/*---------------------------------------------------------
 * Copyright (C) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------*/

import * as assert from 'assert';
import * as fs from 'fs-extra';
import * as path from 'path';
import * as vscode from 'vscode';
import { GoHoverProvider } from '../src/goExtraInfo';
import { GoCompletionItemProvider } from '../src/goSuggest';
import { GoSignatureHelpProvider } from '../src/goSignature';
import { GoDefinitionProvider } from '../src/goDeclaration';
import { getWorkspaceSymbols } from '../src/goSymbol';
import { check } from '../src/goCheck';
import cp = require('child_process');
import { getEditsFromUnifiedDiffStr, getEdits } from '../src/diffUtils';
import jsDiff = require('diff');
import { testCurrentFile } from '../src/goTest';
import { getBinPath, getGoVersion, isVendorSupported } from '../src/util';
import { documentSymbols } from '../src/goOutline';
import { listPackages, getTextEditForAddImport } from '../src/goImport';
import { generateTestCurrentFile, generateTestCurrentPackage, generateTestCurrentFunction } from '../src/goGenerateTests';
import { getAllPackages } from '../src/goPackages';
import { getImportPath } from '../src/util';
import { goPlay } from '../src/goPlayground';
import { goLint } from '../src/goLint';
import { runFillStruct } from '../src/goFillStruct';
import { print } from 'util';

suite('Go Extension Tests', () => {
	let gopath = process.env['GOPATH'];
	if (!gopath) {
		assert.ok(gopath, 'Cannot run tests if GOPATH is not set as environment variable');
		return;
	}

	let repoPath = path.join(gopath, 'src', 'test');
	let fixturePath = path.join(repoPath, 'testfixture');
	let fixtureSourcePath = path.join(__dirname, '..', '..', 'test', 'fixtures');
	let generateTestsSourcePath = path.join(repoPath, 'generatetests');
	let generateFunctionTestSourcePath = path.join(repoPath, 'generatefunctiontest');
	let generatePackageTestSourcePath = path.join(repoPath, 'generatePackagetest');
	let testPath = path.join(__dirname, 'tests');

	suiteSetup(() => {

		fs.removeSync(repoPath);
		fs.removeSync(testPath);
		fs.copySync(path.join(fixtureSourcePath, 'test.go'), path.join(fixturePath, 'test.go'));
		fs.copySync(path.join(fixtureSourcePath, 'errorsTest', 'errors.go'), path.join(fixturePath, 'errorsTest', 'errors.go'));
		fs.copySync(path.join(fixtureSourcePath, 'sample_test.go'), path.join(fixturePath, 'sample_test.go'));
		fs.copySync(path.join(fixtureSourcePath, 'gogetdocTestData', 'test.go'), path.join(fixturePath, 'gogetdocTestData', 'test.go'));
		fs.copySync(path.join(fixtureSourcePath, 'generatetests', 'generatetests.go'), path.join(generateTestsSourcePath, 'generatetests.go'));
		fs.copySync(path.join(fixtureSourcePath, 'generatetests', 'generatetests.go'), path.join(generateFunctionTestSourcePath, 'generatetests.go'));
		fs.copySync(path.join(fixtureSourcePath, 'generatetests', 'generatetests.go'), path.join(generatePackageTestSourcePath, 'generatetests.go'));
		fs.copySync(path.join(fixtureSourcePath, 'diffTestData', 'file1.go'), path.join(fixturePath, 'diffTest1Data', 'file1.go'));
		fs.copySync(path.join(fixtureSourcePath, 'diffTestData', 'file2.go'), path.join(fixturePath, 'diffTest1Data', 'file2.go'));
		fs.copySync(path.join(fixtureSourcePath, 'diffTestData', 'file1.go'), path.join(fixturePath, 'diffTest2Data', 'file1.go'));
		fs.copySync(path.join(fixtureSourcePath, 'diffTestData', 'file2.go'), path.join(fixturePath, 'diffTest2Data', 'file2.go'));
		fs.copySync(path.join(fixtureSourcePath, 'linterTest', 'linter_1.go'), path.join(fixturePath, 'linterTest', 'linter_1.go'));
		fs.copySync(path.join(fixtureSourcePath, 'linterTest', 'linter_2.go'), path.join(fixturePath, 'linterTest', 'linter_2.go'));
		fs.copySync(path.join(fixtureSourcePath, 'errorsTest', 'errors.go'), path.join(testPath, 'errorsTest', 'errors.go'));
		fs.copySync(path.join(fixtureSourcePath, 'linterTest', 'linter_1.go'), path.join(testPath, 'linterTest', 'linter_1.go'));
		fs.copySync(path.join(fixtureSourcePath, 'linterTest', 'linter_2.go'), path.join(testPath, 'linterTest', 'linter_2.go'));
		fs.copySync(path.join(fixtureSourcePath, 'buildTags', 'hello.go'), path.join(fixturePath, 'buildTags', 'hello.go'));
		fs.copySync(path.join(fixtureSourcePath, 'completions', 'unimportedPkgs.go'), path.join(fixturePath, 'completions', 'unimportedPkgs.go'));
		fs.copySync(path.join(fixtureSourcePath, 'completions', 'snippets.go'), path.join(fixturePath, 'completions', 'snippets.go'));
		fs.copySync(path.join(fixtureSourcePath, 'completions', 'nosnippets.go'), path.join(fixturePath, 'completions', 'nosnippets.go'));
		fs.copySync(path.join(fixtureSourcePath, 'completions', 'exportedMemberDocs.go'), path.join(fixturePath, 'completions', 'exportedMemberDocs.go'));
		fs.copySync(path.join(fixtureSourcePath, 'importTest', 'noimports.go'), path.join(fixturePath, 'importTest', 'noimports.go'));
		fs.copySync(path.join(fixtureSourcePath, 'importTest', 'groupImports.go'), path.join(fixturePath, 'importTest', 'groupImports.go'));
		fs.copySync(path.join(fixtureSourcePath, 'importTest', 'singleImports.go'), path.join(fixturePath, 'importTest', 'singleImports.go'));
		fs.copySync(path.join(fixtureSourcePath, 'fillStruct', 'input_1.go'), path.join(fixturePath, 'fillStruct', 'input_1.go'));
		fs.copySync(path.join(fixtureSourcePath, 'fillStruct', 'golden_1.go'), path.join(fixturePath, 'fillStruct', 'golden_1.go'));
		fs.copySync(path.join(fixtureSourcePath, 'fillStruct', 'input_2.go'), path.join(fixturePath, 'fillStruct', 'input_2.go'));
		fs.copySync(path.join(fixtureSourcePath, 'fillStruct', 'golden_2.go'), path.join(fixturePath, 'fillStruct', 'golden_2.go'));
		fs.copySync(path.join(fixtureSourcePath, 'fillStruct', 'input_2.go'), path.join(fixturePath, 'fillStruct', 'input_3.go'));
	});

	suiteTeardown(() => {
		fs.removeSync(repoPath);
		fs.removeSync(testPath);
	});

	function testDefinitionProvider(goConfig: vscode.WorkspaceConfiguration): Thenable<any> {
		let provider = new GoDefinitionProvider(goConfig);
		let uri = vscode.Uri.file(path.join(fixturePath, 'test.go'));
		let position = new vscode.Position(10, 3);
		return vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return provider.provideDefinition(textDocument, position, null).then(definitionInfo => {
				assert.equal(definitionInfo.uri.path.toLowerCase(), uri.path.toLowerCase(), `${definitionInfo.uri.path} is not the same as ${uri.path}`);
				assert.equal(definitionInfo.range.start.line, 6);
				assert.equal(definitionInfo.range.start.character, 5);
			});
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
			return Promise.reject(err);
		});
	}

	function testSignatureHelpProvider(goConfig: vscode.WorkspaceConfiguration, testCases: [vscode.Position, string, string, string[]][]): Thenable<any> {
		let provider = new GoSignatureHelpProvider(goConfig);
		let uri = vscode.Uri.file(path.join(fixturePath, 'gogetdocTestData', 'test.go'));
		return vscode.workspace.openTextDocument(uri).then((textDocument) => {
			let promises = testCases.map(([position, expected, expectedDoc, expectedParams]) =>
				provider.provideSignatureHelp(textDocument, position, null).then(sigHelp => {
					assert.equal(sigHelp.signatures.length, 1, 'unexpected number of overloads');
					assert.equal(sigHelp.signatures[0].label, expected);
					assert.equal(sigHelp.signatures[0].documentation, expectedDoc);
					assert.equal(sigHelp.signatures[0].parameters.length, expectedParams.length);
					for (let i = 0; i < expectedParams.length; i++) {
						assert.equal(sigHelp.signatures[0].parameters[i].label, expectedParams[i]);
					}
				})
			);
			return Promise.all(promises);
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
			return Promise.reject(err);
		});
	}

	function testHoverProvider(goConfig: vscode.WorkspaceConfiguration, testCases: [vscode.Position, string, string][]): Thenable<any> {
		let provider = new GoHoverProvider(goConfig);
		let uri = vscode.Uri.file(path.join(fixturePath, 'gogetdocTestData', 'test.go'));
		return vscode.workspace.openTextDocument(uri).then((textDocument) => {
			let promises = testCases.map(([position, expectedSignature, expectedDocumentation]) =>
				provider.provideHover(textDocument, position, null).then(res => {
					// TODO: Documentation appears to currently be broken on Go 1.7, so disabling these tests for now
					// if (expectedDocumentation === null) {
					//  assert.equal(res.contents.length, 1);
					// } else {
					// 	assert.equal(res.contents.length, 2);
					// 	assert.equal(expectedDocumentation, <string>(res.contents[0]));
					// }
					if (expectedSignature === null && expectedDocumentation === null) {
						assert.equal(res, null);
						return;
					}
					assert.equal(expectedSignature, (<{ language: string; value: string }>res.contents[0]).value);
				})
			);
			return Promise.all(promises);
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
			return Promise.reject(err);
		});
	}

	test('Test Definition Provider using godoc', (done) => {
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'docsTool': { value: 'godoc' }
		});
		testDefinitionProvider(config).then(() => done(), done);
	});

	test('Test Definition Provider using gogetdoc', (done) => {
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'docsTool': { value: 'gogetdoc' }
		});
		getGoVersion().then(version => {
			if (!version || version.major > 1 || (version.major === 1 && version.minor > 5)) {
				return testDefinitionProvider(config);
			}
			return Promise.resolve();
		}).then(() => done(), done);
	});

	test('Test SignatureHelp Provider using godoc', (done) => {
		let printlnDoc = `Println formats using the default formats for its operands and writes to
standard output. Spaces are always added between operands and a newline
is appended. It returns the number of bytes written and any write error
encountered.
`;
		let testCases: [vscode.Position, string, string, string[]][] = [
			[new vscode.Position(19, 13), 'Println(a ...interface{}) (n int, err error)', printlnDoc, ['a ...interface{}']],
			[new vscode.Position(23, 7), 'print(txt string)', null, ['txt string']],
			[new vscode.Position(41, 19), 'Hello(s string, exclaim bool) string', null, ['s string', 'exclaim bool']]
		];
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'docsTool': { value: 'godoc' }
		});
		testSignatureHelpProvider(config, testCases).then(() => done(), done);
	});

	test('Test SignatureHelp Provider using gogetdoc', (done) => {
		let printlnDoc = `Println formats using the default formats for its operands and writes to standard output.
Spaces are always added between operands and a newline is appended.
It returns the number of bytes written and any write error encountered.
`;
		let testCases: [vscode.Position, string, string, string[]][] = [
			[new vscode.Position(19, 13), 'Println(a ...interface{}) (n int, err error)', printlnDoc, ['a ...interface{}']],
			[new vscode.Position(23, 7), 'print(txt string)', 'This is an unexported function so couldnt get this comment on hover :(\nNot anymore!! gogetdoc to the rescue\n', ['txt string']],
			[new vscode.Position(41, 19), 'Hello(s string, exclaim bool) string', 'Hello is a method on the struct ABC. Will signature help understand this correctly\n', ['s string', 'exclaim bool']]
		];
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'docsTool': { value: 'gogetdoc' }
		});
		getGoVersion().then(version => {
			if (!version || version.major > 1 || (version.major === 1 && version.minor > 5)) {
				return testSignatureHelpProvider(config, testCases);
			}
			return Promise.resolve();
		}).then(() => done(), done);
	});

	test('Test Hover Provider using godoc', (done) => {
		let printlnDoc = `Println formats using the default formats for its operands and writes to
standard output. Spaces are always added between operands and a newline
is appended. It returns the number of bytes written and any write error
encountered.
`;
		let testCases: [vscode.Position, string, string][] = [
			// [new vscode.Position(3,3), '/usr/local/go/src/fmt'],
			[new vscode.Position(0, 3), null, null], // keyword
			[new vscode.Position(23, 14), null, null], // inside a string
			[new vscode.Position(20, 0), null, null], // just a }
			[new vscode.Position(28, 16), null, null], // inside a number
			[new vscode.Position(22, 5), 'main func()', null],
			[new vscode.Position(40, 23), 'import (math "math")', null],
			[new vscode.Position(19, 6), 'Println func(a ...interface{}) (n int, err error)', printlnDoc],
			[new vscode.Position(23, 4), 'print func(txt string)', null]
		];
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'docsTool': { value: 'godoc' }
		});
		testHoverProvider(config, testCases).then(() => done(), done);
	});

	test('Test Hover Provider using gogetdoc', (done) => {
		let printlnDoc = `Println formats using the default formats for its operands and writes to standard output.
Spaces are always added between operands and a newline is appended.
It returns the number of bytes written and any write error encountered.
`;
		let testCases: [vscode.Position, string, string][] = [
			[new vscode.Position(0, 3), null, null], // keyword
			[new vscode.Position(23, 11), null, null], // inside a string
			[new vscode.Position(20, 0), null, null], // just a }
			[new vscode.Position(28, 16), null, null], // inside a number
			[new vscode.Position(22, 5), 'func main()', ''],
			[new vscode.Position(23, 4), 'func print(txt string)', 'This is an unexported function so couldnt get this comment on hover :(\nNot anymore!! gogetdoc to the rescue\n'],
			[new vscode.Position(40, 23), 'package math', 'Package math provides basic constants and mathematical functions.\n'],
			[new vscode.Position(19, 6), 'func Println(a ...interface{}) (n int, err error)', printlnDoc],
			[new vscode.Position(27, 14), 'type ABC struct {\n    a int\n    b int\n    c int\n}', 'ABC is a struct, you coudnt use Goto Definition or Hover info on this before\nNow you can due to gogetdoc\n'],
			[new vscode.Position(28, 6), 'func CIDRMask(ones, bits int) IPMask', 'CIDRMask returns an IPMask consisting of `ones\' 1 bits\nfollowed by 0s up to a total length of `bits\' bits.\nFor a mask of this form, CIDRMask is the inverse of IPMask.Size.\n']
		];
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'docsTool': { value: 'gogetdoc' }
		});
		getGoVersion().then(version => {
			if (!version || version.major > 1 || (version.major === 1 && version.minor > 5)) {
				return testHoverProvider(config, testCases);
			}
			return Promise.resolve();
		}).then(() => done(), done);
	});

	test('Error checking', (done) => {
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'vetOnSave': { value: 'package' },
			'vetFlags': { value: ['-all'] },
			'lintOnSave': { value: 'package' },
			'lintTool': { value: 'golint' },
			'lintFlags': { value: [] }
		});
		let expected = [
			{ line: 7, severity: 'warning', msg: 'exported function Print2 should have comment or be unexported' },
			{ line: 11, severity: 'error', msg: 'undefined: prin' },
		];
		getGoVersion().then(version => {
			if (version && version.major === 1 && version.minor < 6) {
				// golint is not supported in Go 1.5, so skip the test
				return Promise.resolve();
			}
			return check(vscode.Uri.file(path.join(fixturePath, 'errorsTest', 'errors.go')), config).then(diagnostics => {
				let sortedDiagnostics = diagnostics.sort((a, b) => a.line - b.line);
				assert.equal(sortedDiagnostics.length > 0, true, `Failed to get linter results`);
				let matchCount = 0;
				for (let i in expected) {
					for (let j in sortedDiagnostics) {
						if (expected[i].line
							&& (expected[i].line === sortedDiagnostics[j].line)
							&& (expected[i].severity === sortedDiagnostics[j].severity)
							&& (expected[i].msg === sortedDiagnostics[j].msg)) {
							matchCount++;
						}
					}
				}
				assert.equal(matchCount >= expected.length, true, `Failed to match expected errors`);
			});
		}).then(() => done(), done);
	});

	test('Test Generate unit tests skeleton for file', (done) => {
		getGoVersion().then(version => {
			if (version && version.major === 1 && version.minor < 6) {
				// gotests is not supported in Go 1.5, so skip the test
				return Promise.resolve();
			}

			let uri = vscode.Uri.file(path.join(generateTestsSourcePath, 'generatetests.go'));
			return vscode.workspace.openTextDocument(uri).then(document => {
				return vscode.window.showTextDocument(document).then(editor => {
					return generateTestCurrentFile().then((result: boolean) => {
						assert.equal(result, true);
						return Promise.resolve();
					});
				});
			}).then(() => {
				vscode.commands.executeCommand('workbench.action.closeActiveEditor');
				if (fs.existsSync(path.join(generateTestsSourcePath, 'generatetests_test.go'))) {
					return Promise.resolve();
				} else {
					return Promise.reject('generatetests_test.go not found');
				}
			});
		}).then(() => done(), done);
	});

	test('Test Generate unit tests skeleton for a function', (done) => {
		getGoVersion().then(version => {
			if (version && version.major === 1 && version.minor < 6) {
				// gotests is not supported in Go 1.5, so skip the test
				return Promise.resolve();
			}

			let uri = vscode.Uri.file(path.join(generateFunctionTestSourcePath, 'generatetests.go'));
			return vscode.workspace.openTextDocument(uri).then(document => {
				return vscode.window.showTextDocument(document).then((editor: vscode.TextEditor) => {
					assert(vscode.window.activeTextEditor, 'No active editor');
					let selection = new vscode.Selection(5, 0, 6, 0);
					editor.selection = selection;
					return generateTestCurrentFunction().then((result: boolean) => {
						assert.equal(result, true);
						return Promise.resolve();
					});
				});
			}).then(() => {
				vscode.commands.executeCommand('workbench.action.closeActiveEditor');
				if (fs.existsSync(path.join(generateTestsSourcePath, 'generatetests_test.go'))) {
					return Promise.resolve();
				} else {
					return Promise.reject('generatetests_test.go not found');
				}
			});
		}).then(() => done(), done);
	});

	test('Test Generate unit tests skeleton for package', (done) => {
		getGoVersion().then(version => {
			if (version && version.major === 1 && version.minor < 6) {
				// gotests is not supported in Go 1.5, so skip the test
				return Promise.resolve();
			}

			let uri = vscode.Uri.file(path.join(generatePackageTestSourcePath, 'generatetests.go'));
			return vscode.workspace.openTextDocument(uri).then(document => {
				return vscode.window.showTextDocument(document).then(editor => {
					return generateTestCurrentPackage().then((result: boolean) => {
						assert.equal(result, true);
						return Promise.resolve();
					});
				});
			}).then(() => {
				vscode.commands.executeCommand('workbench.action.closeActiveEditor');
				if (fs.existsSync(path.join(generateTestsSourcePath, 'generatetests_test.go'))) {
					return Promise.resolve();
				} else {
					return Promise.reject('generatetests_test.go not found');
				}
			});
		}).then(() => done(), done);
	});

	test('Gometalinter error checking', (done) => {
		getGoVersion().then(version => {
			if (version && version.major === 1 && version.minor < 6) {
				// golint in gometalinter is not supported in Go 1.5, so skip the test
				return Promise.resolve();
			}

			let config = Object.create(vscode.workspace.getConfiguration('go'), {
				'lintOnSave': { value: 'package' },
				'lintTool': { value: 'gometalinter' },
				'lintFlags': { value: ['--disable-all', '--enable=varcheck', '--enable=errcheck'] },
				'vetOnSave': { value: 'off' },
				'buildOnSave': { value: 'off' }
			});
			let expected = [
				{ line: 11, severity: 'warning', msg: 'error return value not checked (undeclared name: prin) (errcheck)' },
				{ line: 11, severity: 'warning', msg: 'unused variable or constant undeclared name: prin (varcheck)' },
			];
			let errorsTestPath = path.join(fixturePath, 'errorsTest', 'errors.go');
			return check(vscode.Uri.file(errorsTestPath), config).then(diagnostics => {
				let sortedDiagnostics = diagnostics.sort((a, b) => {
					if (a.msg < b.msg)
						return -1;
					if (a.msg > b.msg)
						return 1;
					return 0;
				});

				assert.equal(sortedDiagnostics.length > 0, true, `Failed to get linter results`);
				let matchCount = 0;
				for (let i in expected) {
					for (let j in sortedDiagnostics) {
						if ((expected[i].line === sortedDiagnostics[j].line)
							&& (expected[i].severity === sortedDiagnostics[j].severity)
							&& (expected[i].msg === sortedDiagnostics[j].msg)) {
							matchCount++;
						}
					}
				}
				assert.equal(matchCount >= expected.length, true, `Failed to match expected errors`);

				return Promise.resolve();
			});
		}).then(() => done(), done);
	});

	test('Test diffUtils.getEditsFromUnifiedDiffStr', (done) => {
		let file1path = path.join(fixturePath, 'diffTest1Data', 'file1.go');
		let file2path = path.join(fixturePath, 'diffTest1Data', 'file2.go');
		let file1uri = vscode.Uri.file(file1path);
		let file2contents = fs.readFileSync(file2path, 'utf8');

		let diffPromise = new Promise((resolve, reject) => {

			cp.exec(`diff -u ${file1path} ${file2path}`, (err, stdout, stderr) => {
				let filePatches = getEditsFromUnifiedDiffStr(stdout);

				if (!filePatches && filePatches.length !== 1) {
					assert.fail(null, null, 'Failed to get patches for the test file', '');
					return reject();
				}

				if (!filePatches[0].fileName) {
					assert.fail(null, null, 'Failed to parse the file path from the diff output', '');
					return reject();
				}

				if (!filePatches[0].edits) {
					assert.fail(null, null, 'Failed to parse edits from the diff output', '');
					return reject();
				}
				resolve(filePatches);
			});
		});

		diffPromise.then((filePatches) => {
			return vscode.workspace.openTextDocument(file1uri).then((textDocument) => {
				return vscode.window.showTextDocument(textDocument).then(editor => {
					return editor.edit((editBuilder) => {
						filePatches[0].edits.forEach(edit => {
							edit.applyUsingTextEditorEdit(editBuilder);
						});
					}).then(() => {
						assert.equal(editor.document.getText(), file2contents);
						return Promise.resolve();
					});
				});
			});
		}).then(() => done(), done);
	});

	test('Test diffUtils.getEdits', (done) => {
		let file1path = path.join(fixturePath, 'diffTest2Data', 'file1.go');
		let file2path = path.join(fixturePath, 'diffTest2Data', 'file2.go');
		let file1uri = vscode.Uri.file(file1path);
		let file1contents = fs.readFileSync(file1path, 'utf8');
		let file2contents = fs.readFileSync(file2path, 'utf8');

		let fileEdits = getEdits(file1path, file1contents, file2contents);

		if (!fileEdits) {
			assert.fail(null, null, 'Failed to get patches for the test file', '');
			done();
			return;
		}

		if (!fileEdits.fileName) {
			assert.fail(null, null, 'Failed to parse the file path from the diff output', '');
			done();
			return;
		}

		if (!fileEdits.edits) {
			assert.fail(null, null, 'Failed to parse edits from the diff output', '');
			done();
			return;
		}

		vscode.workspace.openTextDocument(file1uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {
				return editor.edit((editBuilder) => {
					fileEdits.edits.forEach(edit => {
						edit.applyUsingTextEditorEdit(editBuilder);
					});
				}).then(() => {
					assert.equal(editor.document.getText(), file2contents);
					return Promise.resolve();
				});
			}).then(() => done(), done);
		});
	});

	test('Test Env Variables are passed to Tests', (done) => {
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'testEnvVars': { value: { 'dummyEnvVar': 'dummyEnvValue', 'dummyNonString': 1 } }
		});

		let uri = vscode.Uri.file(path.join(fixturePath, 'sample_test.go'));
		vscode.workspace.openTextDocument(uri).then(document => {
			return vscode.window.showTextDocument(document).then(editor => {
				return testCurrentFile(config, []).then((result: boolean) => {
					assert.equal(result, true);
					return Promise.resolve();
				});
			});
		}).then(() => done(), done);
	});

	test('Test Outline', (done) => {
		let filePath = path.join(fixturePath, 'test.go');
		let options = { fileName: filePath };
		documentSymbols(options, null).then(outlines => {
			let packageOutline = outlines[0];
			let symbols = packageOutline.children;
			let imports = symbols.filter(x => x.type === 'import');
			let functions = symbols.filter(x => x.type === 'function');

			assert.equal(packageOutline.type, 'package');
			assert.equal(packageOutline.label, 'main');
			assert.equal(imports[0].label, '"fmt"');
			assert.equal(functions[0].label, 'print');
			assert.equal(functions[1].label, 'main');
			done();
		}, done);
	});

	test('Test Outline imports only', (done) => {
		let filePath = path.join(fixturePath, 'test.go');
		let options = { fileName: filePath, importsOnly: true };
		documentSymbols(options, null).then(outlines => {
			let packageOutline = outlines[0];
			let symbols = packageOutline.children;
			let imports = symbols.filter(x => x.type === 'import');
			let functions = symbols.filter(x => x.type === 'function');

			assert.equal(packageOutline.type, 'package');
			assert.equal(packageOutline.label, 'main');
			assert.equal(imports[0].label, '"fmt"');
			assert.equal(functions.length, 0);
			assert.equal(imports.length, 1);
			done();
		}, done);
	});

	test('Test listPackages', (done) => {
		let uri = vscode.Uri.file(path.join(fixturePath, 'test.go'));
		vscode.workspace.openTextDocument(uri).then(document => {
			return vscode.window.showTextDocument(document).then(editor => {
				let includeImportedPkgs = listPackages(false);
				let excludeImportedPkgs = listPackages(true);
				return Promise.all([includeImportedPkgs, excludeImportedPkgs]).then(([pkgsInclude, pkgsExclude]) => {
					assert.equal(pkgsInclude.indexOf('fmt') > -1, true);
					assert.equal(pkgsExclude.indexOf('fmt') > -1, false);
				});
			});
		}).then(() => done(), done);
	});

	test('Replace vendor packages with relative path', (done) => {
		// This test needs a go project that has vendor folder and vendor packages
		// Since the Go extension takes a dependency on the godef tool at github.com/rogpeppe/godef
		// which has vendor packages, we are using it here to test the "replace vendor packages with relative path" feature.
		// If the extension ever stops depending on godef tool or if godef ever stops having vendor packages, then this test
		// will fail and will have to be replaced with any other go project with vendor packages

		let vendorSupportPromise = isVendorSupported();
		let filePath = path.join(process.env['GOPATH'], 'src', 'github.com', 'rogpeppe', 'godef', 'go', 'ast', 'ast.go');
		let workDir = path.dirname(filePath);
		let vendorPkgsFullPath = [
			'github.com/rogpeppe/godef/vendor/9fans.net/go/acme',
			'github.com/rogpeppe/godef/vendor/9fans.net/go/plan9',
			'github.com/rogpeppe/godef/vendor/9fans.net/go/plan9/client'
		];
		let vendorPkgsRelativePath = [
			'9fans.net/go/acme',
			'9fans.net/go/plan9',
			'9fans.net/go/plan9/client'
		];

		vendorSupportPromise.then((vendorSupport: boolean) => {
			let gopkgsPromise = getAllPackages(workDir).then(pkgMap => {
				let pkgs = Array.from(pkgMap.keys());
				pkgs = pkgs.filter(p => pkgMap.get(p) !== 'main');
				if (vendorSupport) {
					vendorPkgsFullPath.forEach(pkg => {
						assert.equal(pkgs.indexOf(pkg) > -1, true, `Package not found by goPkgs: ${pkg}`);
					});
					vendorPkgsRelativePath.forEach(pkg => {
						assert.equal(pkgs.indexOf(pkg), -1, `Relative path to vendor package ${pkg} should not be returned by gopkgs command`);
					});
				}
				return Promise.resolve(pkgs);
			});

			let listPkgPromise: Thenable<string[]> = vscode.workspace.openTextDocument(vscode.Uri.file(filePath)).then(document => {
				return vscode.window.showTextDocument(document).then(editor => {
					return listPackages().then(pkgs => {
						if (vendorSupport) {
							vendorPkgsRelativePath.forEach(pkg => {
								assert.equal(pkgs.indexOf(pkg) > -1, true, `Relative path for vendor package ${pkg} not found`);
							});
							vendorPkgsFullPath.forEach(pkg => {
								assert.equal(pkgs.indexOf(pkg), -1, `Full path for vendor package ${pkg} should be shown by listPackages method`);
							});
						}
						return Promise.resolve(pkgs);
					});
				});
			});

			return Promise.all<string[]>([gopkgsPromise, listPkgPromise]).then((values: string[][]) => {
				if (!vendorSupport) {
					let originalPkgs = values[0].sort();
					let updatedPkgs = values[1].sort();
					assert.equal(originalPkgs.length, updatedPkgs.length);
					for (let index = 0; index < originalPkgs.length; index++) {
						assert.equal(updatedPkgs[index], originalPkgs[index]);
					}
				}
			});
		}).then(() => done(), done);
	});

	test('Vendor pkgs from other projects should not be allowed to import', (done) => {
		// This test needs a go project that has vendor folder and vendor packages
		// Since the Go extension takes a dependency on the godef tool at github.com/rogpeppe/godef
		// which has vendor packages, we are using it here to test the "replace vendor packages with relative path" feature.
		// If the extension ever stops depending on godef tool or if godef ever stops having vendor packages, then this test
		// will fail and will have to be replaced with any other go project with vendor packages

		let vendorSupportPromise = isVendorSupported();
		let filePath = path.join(process.env['GOPATH'], 'src', 'github.com', 'ramya-rao-a', 'go-outline', 'main.go');
		let vendorPkgs = [
			'github.com/rogpeppe/godef/vendor/9fans.net/go/acme',
			'github.com/rogpeppe/godef/vendor/9fans.net/go/plan9',
			'github.com/rogpeppe/godef/vendor/9fans.net/go/plan9/client'
		];

		vendorSupportPromise.then((vendorSupport: boolean) => {
			let gopkgsPromise = new Promise<void>((resolve, reject) => {
				let cmd = cp.spawn(getBinPath('gopkgs'), ['-format', '{{.ImportPath}}'], { env: process.env });
				let chunks = [];
				cmd.stdout.on('data', (d) => chunks.push(d));
				cmd.on('close', () => {
					let pkgs = chunks.join('').split('\n').filter((pkg) => pkg).sort();
					if (vendorSupport) {
						vendorPkgs.forEach(pkg => {
							assert.equal(pkgs.indexOf(pkg) > -1, true, `Package not found by goPkgs: ${pkg}`);
						});
					}
					return resolve();
				});
			});

			let listPkgPromise: Thenable<void> = vscode.workspace.openTextDocument(vscode.Uri.file(filePath)).then(document => {
				return vscode.window.showTextDocument(document).then(editor => {
					return listPackages().then(pkgs => {
						if (vendorSupport) {
							vendorPkgs.forEach(pkg => {
								assert.equal(pkgs.indexOf(pkg), -1, `Vendor package ${pkg} should not be shown by listPackages method`);
							});
						}
						return Promise.resolve();
					});
				});
			});

			return Promise.all<void>([gopkgsPromise, listPkgPromise]);
		}).then(() => done(), done);
	});

	test('Workspace Symbols', () => {
		// This test needs a go project that has vendor folder and vendor packages
		// Since the Go extension takes a dependency on the godef tool at github.com/rogpeppe/godef
		// which has vendor packages, we are using it here to test the "replace vendor packages with relative path" feature.
		// If the extension ever stops depending on godef tool or if godef ever stops having vendor packages, then this test
		// will fail and will have to be replaced with any other go project with vendor packages

		let workspacePath = path.join(process.env['GOPATH'], 'src', 'github.com', 'rogpeppe', 'godef');
		let configWithoutIgnoringFolders = Object.create(vscode.workspace.getConfiguration('go'), {
			'gotoSymbol': {
				value: {
					'ignoreFolders': []
				}
			}
		});
		let configWithIgnoringFolders = Object.create(vscode.workspace.getConfiguration('go'), {
			'gotoSymbol': {
				value: {
					'ignoreFolders': ['vendor']
				}
			}
		});
		let configWithIncludeGoroot = Object.create(vscode.workspace.getConfiguration('go'), {
			'gotoSymbol': {
				value: {
					'includeGoroot': true
				}
			}
		});
		let configWithoutIncludeGoroot = Object.create(vscode.workspace.getConfiguration('go'), {
			'gotoSymbol': {
				value: {
					'includeGoroot': false
				}
			}
		});

		let withoutIgnoringFolders = getWorkspaceSymbols(workspacePath, 'WinInfo', null, configWithoutIgnoringFolders).then(results => {
			assert.equal(results[0].name, 'WinInfo');
			assert.equal(results[0].path, path.join(workspacePath, 'vendor/9fans.net/go/acme/acme.go'));
		});
		let withIgnoringFolders = getWorkspaceSymbols(workspacePath, 'WinInfo', null, configWithIgnoringFolders).then(results => {
			assert.equal(results.length, 0);
		});
		let withoutIncludingGoroot = getWorkspaceSymbols(workspacePath, 'Mutex', null, configWithoutIncludeGoroot).then(results => {
			assert.equal(results.length, 0);
		});
		let withIncludingGoroot = getWorkspaceSymbols(workspacePath, 'Mutex', null, configWithIncludeGoroot).then(results => {
			assert(results.some(result => result.name === 'Mutex'));
		});

		return Promise.all([withIgnoringFolders, withoutIgnoringFolders, withIncludingGoroot, withoutIncludingGoroot]);
	});

	test('Test Completion', (done) => {
		let provider = new GoCompletionItemProvider();
		let testCases: [vscode.Position, string[]][] = [
			[new vscode.Position(1, 0), []],
			[new vscode.Position(4, 1), ['main', 'print', 'fmt']],
			[new vscode.Position(7, 4), ['fmt']],
			[new vscode.Position(8, 0), ['main', 'print', 'fmt', 'txt']]
		];
		let uri = vscode.Uri.file(path.join(fixturePath, 'test.go'));
		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {
				let promises = testCases.map(([position, expected]) =>
					provider.provideCompletionItems(editor.document, position, null).then(items => {
						let labels = items.map(x => x.label);
						for (let entry of expected) {
							if (labels.indexOf(entry) < 0) {
								assert.fail('', entry, 'missing expected item in competion list', '');
							}
						}
					})
				);
				return Promise.all(promises);
			}).then(() => {
				vscode.commands.executeCommand('workbench.action.closeActiveEditor');
				return Promise.resolve();
			});
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
		}).then(() => done(), done);
	});

	test('Test Completion Snippets For Functions', (done) => {
		let provider = new GoCompletionItemProvider();
		let uri = vscode.Uri.file(path.join(fixturePath, 'completions', 'snippets.go'));
		let testCases: [vscode.Position, string[]][] = [
			[new vscode.Position(5, 6), ['Print']]
		];
		let baseConfig = vscode.workspace.getConfiguration('go');
		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {

				let noFunctionSnippet = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(9, 6), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: false } })).then(items => {
					let item = items.find(x => x.label === 'Print');
					assert.equal(!item.insertText, true);
				});

				let withFunctionSnippet = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(9, 6), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'Print');
					assert.equal((<vscode.SnippetString>item.insertText).value, 'Print(${1:a ...interface{\\}})');

				});

				let withFunctionSnippetNotype = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(9, 6), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggestWithoutType': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'Print');
					assert.equal((<vscode.SnippetString>item.insertText).value, 'Print(${1:a})');
				});

				let noFunctionAsVarSnippet = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(11, 3), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: false } })).then(items => {
					let item = items.find(x => x.label === 'funcAsVariable');
					assert.equal(!item.insertText, true);
				});

				let withFunctionAsVarSnippet = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(11, 3), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'funcAsVariable');
					assert.equal((<vscode.SnippetString>item.insertText).value, 'funcAsVariable(${1:k string})');
				});

				let withFunctionAsVarSnippetNoType = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(11, 3), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggestWithoutType': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'funcAsVariable');
					assert.equal((<vscode.SnippetString>item.insertText).value, 'funcAsVariable(${1:k})');
				});

				let noFunctionAsTypeSnippet = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(14, 0), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: false } })).then(items => {
					let item1 = items.find(x => x.label === 'HandlerFunc');
					let item2 = items.find(x => x.label === 'HandlerFuncWithArgNames');
					let item3 = items.find(x => x.label === 'HandlerFuncNoReturnType');
					assert.equal(!item1.insertText, true);
					assert.equal(!item2.insertText, true);
					assert.equal(!item3.insertText, true);
				});

				let withFunctionAsTypeSnippet = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(14, 0), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: true } })).then(items => {
					let item1 = items.find(x => x.label === 'HandlerFunc');
					let item2 = items.find(x => x.label === 'HandlerFuncWithArgNames');
					let item3 = items.find(x => x.label === 'HandlerFuncNoReturnType');
					assert.equal((<vscode.SnippetString>item1.insertText).value, 'HandlerFunc(func(${1:arg1} string, ${2:arg2} string) {\n\t$3\n}) (string, string)');
					assert.equal((<vscode.SnippetString>item2.insertText).value, 'HandlerFuncWithArgNames(func(${1:w} string, ${2:r} string) {\n\t$3\n}) int');
					assert.equal((<vscode.SnippetString>item3.insertText).value, 'HandlerFuncNoReturnType(func(${1:arg1} string, ${2:arg2} string) {\n\t$3\n})');
				});

				return Promise.all([
					noFunctionSnippet, withFunctionSnippet, withFunctionSnippetNotype,
					noFunctionAsVarSnippet, withFunctionAsVarSnippet, withFunctionAsVarSnippetNoType,
					noFunctionAsTypeSnippet, withFunctionAsTypeSnippet]).then(() => vscode.commands.executeCommand('workbench.action.closeActiveEditor'));
			});
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
		}).then(() => done(), done);
	});

	test('Test No Completion Snippets For Functions', (done) => {
		let provider = new GoCompletionItemProvider();
		let uri = vscode.Uri.file(path.join(fixturePath, 'completions', 'nosnippets.go'));
		let baseConfig = vscode.workspace.getConfiguration('go');
		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {

				let symbolFollowedByBrackets = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(5, 10), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'Print');
					assert.equal(!item.insertText, true, 'Unexpected snippet when symbol is followed by ().');
				});

				let symbolAsLastParameter = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(7, 13), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'funcAsVariable');
					assert.equal(!item.insertText, true, 'Unexpected snippet when symbol is a parameter inside func call');
				});

				let symbolsAsNonLastParameter = provider.provideCompletionItemsInternal(editor.document, new vscode.Position(8, 11), null, Object.create(baseConfig, { 'useCodeSnippetsOnFunctionSuggest': { value: true } })).then(items => {
					let item = items.find(x => x.label === 'funcAsVariable');
					assert.equal(!item.insertText, true, 'Unexpected snippet when symbol is one of the parameters inside func call.');
				});

				return Promise.all([
					symbolFollowedByBrackets, symbolAsLastParameter, symbolsAsNonLastParameter]).then(() => vscode.commands.executeCommand('workbench.action.closeActiveEditor'));
			});
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
		}).then(() => done(), done);
	});

	test('Test Completion on unimported packages', (done) => {
		let config = Object.create(vscode.workspace.getConfiguration('go'), {
			'autocompleteUnimportedPackages': { value: true }
		});
		let provider = new GoCompletionItemProvider();
		let testCases: [vscode.Position, string[]][] = [
			[new vscode.Position(10, 3), ['bytes']],
			[new vscode.Position(11, 6), ['Abs', 'Acos', 'Asin']]
		];
		let uri = vscode.Uri.file(path.join(fixturePath, 'completions', 'unimportedPkgs.go'));

		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {
				let promises = testCases.map(([position, expected]) =>
					provider.provideCompletionItemsInternal(editor.document, position, null, config).then(items => {
						let labels = items.map(x => x.label);
						for (let entry of expected) {
							assert.equal(labels.indexOf(entry) > -1, true, `missing expected item in completion list: ${entry} Actual: ${labels}`);
						}
					})
				);
				return Promise.all(promises).then(() => vscode.commands.executeCommand('workbench.action.closeActiveEditor'));
			});
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
		}).then(() => done(), done);
	});

	test('Test Completion on Comments for Exported Members', (done) => {
		let provider = new GoCompletionItemProvider();
		let testCases: [vscode.Position, string[]][] = [
			[new vscode.Position(6, 4), ['Language']],
			[new vscode.Position(9, 4), ['GreetingText']],
			// checking for comment completions with begining of comment without space
			[new vscode.Position(12, 2), []],
			// cursor between /$/ this should not trigger any completion
			[new vscode.Position(12, 1), []],
			[new vscode.Position(12, 4), ['SayHello']],
			[new vscode.Position(17, 5), ['HelloParams']],
			[new vscode.Position(26, 5), ['Abs']],
		];
		let uri = vscode.Uri.file(path.join(fixturePath, 'completions', 'exportedMemberDocs.go'));

		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {
				let promises = testCases.map(([position, expected]) =>
					provider.provideCompletionItems(editor.document, position, null).then(items => {
						let labels = items.map(x => x.label);
						assert.equal(expected.length, labels.length, `expected number of completions: ${expected.length} Actual: ${labels.length} at position(${position.line},${position.character}) ${labels}`);
						expected.forEach((entry, index) => {
							assert.equal(entry, labels[index], `mismatch in comment completion list Expected: ${entry} Actual: ${labels[index]}`);
						});

					})
				);
				return Promise.all(promises).then(() => vscode.commands.executeCommand('workbench.action.closeActiveEditor'));
			});
		}, (err) => {
			assert.ok(false, `error in OpenTextDocument ${err}`);
		}).then(() => done(), done);
	});

	test('getImportPath()', () => {
		let testCases: [string, string][] = [
			['import "github.com/sirupsen/logrus"', 'github.com/sirupsen/logrus'],
			['import "net/http"', 'net/http'],
			['"github.com/sirupsen/logrus"', 'github.com/sirupsen/logrus'],
			['', ''],
			['func foo(bar int) (int, error) {', ''],
			['// This is a comment, complete with punctuation.', '']
		];

		testCases.forEach(run => {
			assert.equal(run[1], getImportPath(run[0]));
		});
	});

	test('goPlay - success run', (done) => {
		const validCode = `
			package main
			import (
				"fmt"
			)
			func main() {
				for i := 1; i < 4; i++ {
					fmt.Printf("%v ", i)
				}
				fmt.Print("Go!")
			}`;
		const goConfig = Object.create(vscode.workspace.getConfiguration('go'), {
			'playground': { value: { run: true, openbrowser: false, share: false } }
		});

		goPlay(validCode, goConfig['playground']).then(result => {
			assert(
				result.includes('1 2 3 Go!')
			);
		}, (e) => {
			assert.ifError(e);
		}).then(() => done(), done);
	});

	test('goPlay - success run & share', (done) => {
		const validCode = `
			package main
			import (
				"fmt"
			)
			func main() {
				for i := 1; i < 4; i++ {
					fmt.Printf("%v ", i)
				}
				fmt.Print("Go!")
			}`;
		const goConfig = Object.create(vscode.workspace.getConfiguration('go'), {
			'playground': { value: { run: true, openbrowser: false, share: true } }
		});

		goPlay(validCode, goConfig['playground']).then(result => {
			assert(result.includes('1 2 3 Go!'));
			assert(result.includes('https://play.golang.org/'));
		}, (e) => {
			assert.ifError(e);
		}).then(() => done(), done);
	});

	test('goPlay - fail', (done) => {
		const invalidCode = `
			package main
			import (
				"fmt"
			)
			func fantasy() {
				fmt.Print("not a main package, sorry")
			}`;
		const goConfig = Object.create(vscode.workspace.getConfiguration('go'), {
			'playground': { value: { run: true, openbrowser: false, share: false } }
		});

		goPlay(invalidCode, goConfig['playground']).then(result => {
			assert.ifError(result);
		}, (e) => {
			assert.ok(e);
		}).then(() => done(), done);
	});

	test('Build Tags checking', (done) => {
		const config1 = Object.create(vscode.workspace.getConfiguration('go'), {
			'vetOnSave': { value: 'off' },
			'lintOnSave': { value: 'off' },
			'buildOnSave': { value: 'package' },
			'buildTags': { value: 'randomtag' }
		});

		const checkWithTags = check(vscode.Uri.file(path.join(fixturePath, 'buildTags', 'hello.go')), config1).then(diagnostics => {
			assert.equal(1, diagnostics.length, 'check with buildtag failed. Unexpected errors found');
			assert.equal(diagnostics[0].msg, 'undefined: fmt.Prinln');
		});

		const config2 = Object.create(vscode.workspace.getConfiguration('go'), {
			'vetOnSave': { value: 'off' },
			'lintOnSave': { value: 'off' },
			'buildOnSave': { value: 'package' },
			'buildTags': { value: 'randomtag othertag' }
		});

		const checkWithMultipleTags = check(vscode.Uri.file(path.join(fixturePath, 'buildTags', 'hello.go')), config2).then(diagnostics => {
			assert.equal(1, diagnostics.length, 'check with multiple buildtags failed. Unexpected errors found');
			assert.equal(diagnostics[0].msg, 'undefined: fmt.Prinln');
		});

		const config3 = Object.create(vscode.workspace.getConfiguration('go'), {
			'vetOnSave': { value: 'off' },
			'lintOnSave': { value: 'off' },
			'buildOnSave': { value: 'package' },
			'buildTags': { value: '' }
		});

		const checkWithoutTags = check(vscode.Uri.file(path.join(fixturePath, 'buildTags', 'hello.go')), config3).then(diagnostics => {
			assert.equal(1, diagnostics.length, 'check without buildtags failed. Unexpected errors found');
			assert.equal(diagnostics[0].msg.indexOf('can\'t load package: package test/testfixture/buildTags') > -1, true, `check without buildtags failed. Go files not excluded. ${diagnostics[0].msg}`);
		});

		Promise.all([checkWithTags, checkWithMultipleTags, checkWithoutTags]).then(() => done(), done);

	});

	test('Add imports when no imports', (done) => {
		let uri = vscode.Uri.file(path.join(fixturePath, 'importTest', 'noimports.go'));
		vscode.workspace.openTextDocument(uri).then(document => {
			return vscode.window.showTextDocument(document).then(editor => {
				const expectedText = document.getText() + '\n' + 'import (\n\t"bytes"\n)\n';
				const edits = getTextEditForAddImport('bytes');
				const edit = new vscode.WorkspaceEdit();
				edit.set(document.uri, edits);
				return vscode.workspace.applyEdit(edit).then(() => {
					assert.equal(vscode.window.activeTextEditor.document.getText(), expectedText);
					return Promise.resolve();
				});
			});
		}).then(() => done(), done);
	});

	test('Add imports to an import block', (done) => {
		let uri = vscode.Uri.file(path.join(fixturePath, 'importTest', 'groupImports.go'));
		vscode.workspace.openTextDocument(uri).then(document => {
			return vscode.window.showTextDocument(document).then(editor => {
				const expectedText = document.getText().replace('\t"fmt"\n\t"math"', '\t"bytes"\n\t"fmt"\n\t"math"');
				const edits = getTextEditForAddImport('bytes');
				const edit = new vscode.WorkspaceEdit();
				edit.set(document.uri, edits);
				return vscode.workspace.applyEdit(edit).then(() => {
					assert.equal(vscode.window.activeTextEditor.document.getText(), expectedText);
					return Promise.resolve();
				});
			});
		}).then(() => done(), done);
	});

	test('Add imports and collapse single imports to an import block', (done) => {
		let uri = vscode.Uri.file(path.join(fixturePath, 'importTest', 'singleImports.go'));
		vscode.workspace.openTextDocument(uri).then(document => {
			return vscode.window.showTextDocument(document).then(editor => {
				const expectedText = document.getText().replace('import "fmt"\nimport . "math" // comment', 'import (\n\t"bytes"\n\t"fmt"\n\t. "math" // comment\n)');
				const edits = getTextEditForAddImport('bytes');
				const edit = new vscode.WorkspaceEdit();
				edit.set(document.uri, edits);
				return vscode.workspace.applyEdit(edit).then(() => {
					assert.equal(vscode.window.activeTextEditor.document.getText(), expectedText);
					return Promise.resolve();
				});
			});
		}).then(() => done(), done);
	});

	test('Fill struct', (done) => {
		let uri = vscode.Uri.file(path.join(fixturePath, 'fillStruct', 'input_1.go'));
		let golden = fs.readFileSync(path.join(fixturePath, 'fillStruct', 'golden_1.go'), 'utf-8');

		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {
				let selection = new vscode.Selection(12, 15, 12, 15);
				editor.selection = selection;
				return runFillStruct(editor).then(() => {
					assert.equal(vscode.window.activeTextEditor.document.getText(), golden);
					return Promise.resolve();
				});
			});
		}).then(() => done(), done);
	});

	test('Fill struct - select line', (done) => {
		let uri = vscode.Uri.file(path.join(fixturePath, 'fillStruct', 'input_2.go'));
		let golden = fs.readFileSync(path.join(fixturePath, 'fillStruct', 'golden_2.go'), 'utf-8');

		vscode.workspace.openTextDocument(uri).then((textDocument) => {
			return vscode.window.showTextDocument(textDocument).then(editor => {
				let selection = new vscode.Selection(7, 0, 7, 10);
				editor.selection = selection;
				return runFillStruct(editor).then(() => {
					assert.equal(vscode.window.activeTextEditor.document.getText(), golden);
					return Promise.resolve();
				});
			});
		}).then(() => done(), done);
	});
});