src/goTestExplorer: implement a test provider for the new test api

What this does:
- Implements a test provider using the new API
- Populates the test explorer with a list of modules and/or workspaces
- Populates each module/workspace/package/file as it is expanded
- Creates test entries for the current file, and package/module parents
- Runs tests!

What this does not:
- Debug tests
- Handle stretchr suites

Issues:
- Handling of benchmarks isn't great. But I'm not sure it can get much
  better without changes to `go test`.
- If a test has subtests, I add those subtests. This can get annoying if
  you have a bunch of subtests. Should this be configurable? Disabling
  `testing.followRunningTest` can improve this UX.

Fixes #1579

Change-Id: I027c7c3b615eda4c528da9739520e6bfd1aa6911
GitHub-Last-Rev: 59af29b
GitHub-Pull-Request: #1590
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/330809
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
Trust: Suzy Mueller <suzmue@golang.org>

Author: firelizzard18

docs/commands.md

@@ -59,6 +59,10 @@ Runs all unit tests in the current file.
 
 Runs all unit tests in the package of the current file.
 
+### `Go Test: Refresh`
+
+Refresh a test in the test explorer. Only available as a context menu option in the test explorer.
+
 ### `Go: Benchmark Package`
 
 Runs all benchmarks in the package of the current file.

docs/settings.md

@@ -393,6 +393,22 @@ Absolute path to a file containing environment variables definitions. File conte
 ### `go.testEnvVars`
 
 Environment variables that will be passed to the process that runs the Go tests
+### `go.testExplorerConcatenateMessages`
+
+If true, test log messages associated with a given location will be shown as a single message.
+
+Default: `true`
+### `go.testExplorerPackages`
+
+Control whether packages in the test explorer are presented flat or nested.<br/>
+Allowed Options: `flat`, `nested`
+
+Default: `"flat"`
+### `go.testExplorerRunBenchmarks`
+
+Include benchmarks when running all tests in a group.
+
+Default: `false`
 ### `go.testFlags`
 
 Flags to pass to `go test`. If null, then buildFlags will be used. This is not propagated to the language server.

package-lock.json

@@ -15,7 +15,8 @@
     "Snippets",
     "Linters",
     "Debuggers",
-    "Formatters"
+    "Formatters",
+    "Testing"
   ],
   "galleryBanner": {
     "color": "#F2F2F2",
@@ -70,7 +71,7 @@
     "@types/node": "^13.11.1",
     "@types/semver": "^7.1.0",
     "@types/sinon": "^9.0.0",
-    "@types/vscode": "^1.52.0",
+    "@types/vscode": "^1.59.0",
     "adm-zip": "^0.4.14",
     "fs-extra": "^9.0.0",
     "get-port": "^5.1.1",
@@ -232,6 +233,13 @@
         "title": "Go: Test Package",
         "description": "Runs all unit tests in the package of the current file."
       },
+      {
+        "command": "go.test.refresh",
+        "title": "Go Test: Refresh",
+        "description": "Refresh a test in the test explorer. Only available as a context menu option in the test explorer.",
+        "category": "Test",
+        "icon": "$(refresh)"
+      },
       {
         "command": "go.benchmark.package",
         "title": "Go: Benchmark Package",
@@ -1282,6 +1290,28 @@
           "description": "Flags to pass to `go test`. If null, then buildFlags will be used. This is not propagated to the language server.",
           "scope": "resource"
         },
+        "go.testExplorerPackages": {
+          "type": "string",
+          "enum": [
+            "flat",
+            "nested"
+          ],
+          "default": "flat",
+          "description": "Control whether packages in the test explorer are presented flat or nested.",
+          "scope": "resource"
+        },
+        "go.testExplorerRunBenchmarks": {
+          "type": "boolean",
+          "default": false,
+          "description": "Include benchmarks when running all tests in a group.",
+          "scope": "resource"
+        },
+        "go.testExplorerConcatenateMessages": {
+          "type": "boolean",
+          "default": true,
+          "description": "If true, test log messages associated with a given location will be shown as a single message.",
+          "scope": "resource"
+        },
         "go.generateTestsFlags": {
           "type": "array",
           "items": {
@@ -2356,6 +2386,12 @@
       }
     },
     "menus": {
+      "commandPalette": [
+        {
+          "command": "go.test.refresh",
+          "when": "false"
+        }
+      ],
       "editor/context": [
         {
           "when": "editorTextFocus && config.go.editorContextMenuCommands.toggleTestFile && resourceLangId == go",
@@ -2437,6 +2473,13 @@
           "command": "go.show.commands",
           "group": "Go group 2"
         }
+      ],
+      "testing/item/context": [
+        {
+          "command": "go.test.refresh",
+          "when": "testId =~ /_test\\.go/",
+          "group": "inline"
+        }
       ]
     }
   }

package.json

@@ -631,7 +631,9 @@ export async function buildLanguageClient(cfg: BuildLanguageClientOption): Promi
 							// cause to reorder candiates, which is not ideal.
 							// Force to use non-empty `label`.
 							// https://github.com/golang/vscode-go/issues/441
-							hardcodedFilterText = items[0].label;
+							let { label } = items[0];
+							if (typeof label !== 'string') label = label.label;
+							hardcodedFilterText = label;
 						}
 						for (const item of items) {
 							item.filterText = hardcodedFilterText;

src/goLanguageServer.ts

@@ -114,6 +114,7 @@ import { getFormatTool } from './goFormat';
 import { resetSurveyConfig, showSurveyConfig, timeMinute } from './goSurvey';
 import { ExtensionAPI } from './export';
 import extensionAPI from './extensionAPI';
+import { isVscodeTestingAPIAvailable, TestExplorer } from './goTestExplorer';
 
 export let buildDiagnosticCollection: vscode.DiagnosticCollection;
 export let lintDiagnosticCollection: vscode.DiagnosticCollection;
@@ -335,6 +336,16 @@ If you would like additional configuration for diagnostics from gopls, please se
 		})
 	);
 
+	if (isVscodeTestingAPIAvailable) {
+		const testExplorer = TestExplorer.setup(ctx);
+
+		ctx.subscriptions.push(
+			vscode.commands.registerCommand('go.test.refresh', (args) => {
+				if (args) testExplorer.resolve(args);
+			})
+		);
+	}
+
 	ctx.subscriptions.push(
 		vscode.commands.registerCommand('go.subtest.cursor', (args) => {
 			const goConfig = getGoConfig();

src/goMain.ts

@@ -36,7 +36,8 @@ async function runGoModEnv(folderPath: string): Promise<string> {
 				return resolve('');
 			}
 			const [goMod] = stdout.split('\n');
-			resolve(goMod);
+			if (goMod === '/dev/null' || goMod === 'NUL') resolve('');
+			else resolve(goMod);
 		});
 	});
 }

src/goModules.ts

@@ -122,11 +122,14 @@ export class GoCompletionItemProvider implements vscode.CompletionItemProvider,
 			return;
 		}
 
+		let { label } = item;
+		if (typeof label !== 'string') label = label.label;
+
 		return runGodoc(
 			path.dirname(item.fileName),
 			item.package || path.dirname(item.fileName),
 			item.receiver,
-			item.label,
+			label,
 			token
 		)
 			.then((doc) => {
@@ -358,7 +361,9 @@ export class GoCompletionItemProvider implements vscode.CompletionItemProvider,
 								areCompletionsForPackageSymbols = true;
 							}
 							if (suggest.class === 'package') {
-								const possiblePackageImportPaths = this.getPackageImportPath(item.label);
+								let { label } = item;
+								if (typeof label !== 'string') label = label.label;
+								const possiblePackageImportPaths = this.getPackageImportPath(label);
 								if (possiblePackageImportPaths.length === 1) {
 									item.detail = possiblePackageImportPaths[0];
 								}