src/goTest: populate tests for open docs on start

Reverts CL 343490 and explicitly scans all open documents when the
extension is activated. From the discussion on microsoft/vscode#131282,
I am confident that the strage Git URLs are created by the Git extension
and are not intended for use by other extensions.

Change-Id: I234c572e9f31b0af5eb21dd2e0ff67d8f4d818a7
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/348570
Reviewed-by: Hyang-Ah Hana Kim <[email protected]>
Trust: Hyang-Ah Hana Kim <[email protected]>
Trust: Suzy Mueller <[email protected]>
Run-TryBot: Hyang-Ah Hana Kim <[email protected]>
TryBot-Result: kokoro <[email protected]>

Author: firelizzard18

src/goTest/explore.ts

@@ -40,6 +40,11 @@ export class GoTestExplorer {
 			symProvider.provideDocumentSymbols(doc, token)
 		);
 
+		// Process already open editors
+		vscode.window.visibleTextEditors.forEach((ed) => {
+			inst.documentUpdate(ed.document);
+		});
+
 		context.subscriptions.push(ctrl);
 		context.subscriptions.push(vscode.window.registerTreeDataProvider('go.test.profile', inst.profiler.view));
 
@@ -271,12 +276,6 @@ export class GoTestExplorer {
 
 	// Handle opened documents, document changes, and file creation.
 	private async documentUpdate(doc: TextDocument, ranges?: Range[]) {
-		if (doc.uri.scheme === 'git') {
-			// TODO(firelizzard18): When a workspace is reopened, VSCode passes us git: URIs. Why?
-			const { path } = JSON.parse(doc.uri.query);
-			doc = await vscode.workspace.openTextDocument(path);
-		}
-
 		if (!doc.uri.path.endsWith('_test.go')) {
 			return;
 		}