test/integration: test go explorer tree view ui

For #2049

Change-Id: I5b66e4565f0d615a6cff31677981913a3e02d4b7
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/389454
Trust: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>

test/integration/goExplorer.test.ts

@@ -0,0 +1,64 @@
+/*---------------------------------------------------------
+ * Copyright 2022 The Go Authors. All rights reserved.
+ * Licensed under the MIT License. See LICENSE in the project root for license information.
+ *--------------------------------------------------------*/
+
+import assert from 'assert';
+import path from 'path';
+import { TreeItem, Uri, window, workspace } from 'vscode';
+import { getGoConfig, getGoplsConfig } from '../../src/config';
+
+import { GoExplorerProvider } from '../../src/goExplorer';
+import { getConfiguredTools } from '../../src/goTools';
+import { getGoVersion } from '../../src/util';
+import { resolveHomeDir } from '../../src/utils/pathUtils';
+import { MockExtensionContext } from '../mocks/MockContext';
+
+suite('GoExplorerProvider', () => {
+	const fixtureDir = path.join(__dirname, '../../../test/testdata/baseTest');
+	const ctx = MockExtensionContext.new();
+	let explorer: GoExplorerProvider;
+
+	suiteSetup(async () => {
+		explorer = GoExplorerProvider.setup(ctx);
+		const uri = Uri.file(path.join(fixtureDir, 'test.go'));
+		await workspace.openTextDocument(uri);
+		await window.showTextDocument(uri);
+	});
+
+	suiteTeardown(() => {
+		ctx.teardown();
+	});
+
+	test('env tree', async () => {
+		const [env] = await explorer.getChildren();
+		assert.strictEqual(env.label, 'env');
+		assert.strictEqual(env.contextValue, 'go:explorer:env');
+	});
+
+	test('env tree items', async () => {
+		const [env] = await explorer.getChildren();
+		const [goenv, gomod] = (await explorer.getChildren(env)) as { key: string; value: string }[];
+		assert.strictEqual(goenv.key, 'GOENV');
+		assert.strictEqual(gomod.key, 'GOMOD');
+		assert.strictEqual(resolveHomeDir(gomod.value), `${fixtureDir}/go.mod`);
+	});
+
+	test('tools tree', async () => {
+		const [, tools] = await explorer.getChildren();
+		assert(tools.label === 'tools');
+		assert.strictEqual(tools.contextValue, 'go:explorer:tools');
+	});
+
+	test('tools tree items', async () => {
+		const goVersion = await getGoVersion();
+		const allTools = getConfiguredTools(goVersion, getGoConfig(), getGoplsConfig());
+		const expectTools = allTools.map((t) => t.name);
+		const [, tools] = await explorer.getChildren();
+		const items = (await explorer.getChildren(tools)) as TreeItem[];
+		assert.deepStrictEqual(
+			items.map((t) => t.label),
+			expectTools
+		);
+	});
+});