Make sure build command tests has no ordering requisite (#1213)

* Make sure build command tests can has no ordering requisite

Right now the clean command test relies on the build command test to
complete. That's not behaviour we want. Ideally tests should be able to
run in isolation.

Issue: #1184

* Retain the old test lay out
- Add in per test tear down and required test step for clean command
test

Author: michael-weng

test/integration-tests/commands/build.test.ts

@@ -35,6 +35,7 @@ suite("Build Commands", function () {
     let folderContext: FolderContext;
     let workspaceContext: WorkspaceContext;
     let settingsTeardown: () => Promise<void>;
+    let buildPath: string;
     const uri = testAssetUri("defaultPackage/Sources/PackageExe/main.swift");
     const breakpoints = [
         new vscode.SourceBreakpoint(new vscode.Location(uri, new vscode.Position(2, 0))),
@@ -44,6 +45,7 @@ suite("Build Commands", function () {
         workspaceContext = await activateExtension();
         await waitForNoRunningTasks();
         folderContext = await folderInRootWorkspace("defaultPackage", workspaceContext);
+        buildPath = path.join(folderContext.folder.fsPath, ".build");
         await workspaceContext.focusFolder(folderContext);
         await vscode.window.showTextDocument(uri);
         settingsTeardown = await updateSettings({
@@ -58,6 +60,13 @@ suite("Build Commands", function () {
         await deactivateExtension();
     });
 
+    teardown(() => {
+        // Remove the build directory after each test case
+        if (fs.existsSync(buildPath)) {
+            fs.rmSync(buildPath, { recursive: true, force: true });
+        }
+    });
+
     test("Swift: Run Build", async () => {
         // A breakpoint will have not effect on the Run command.
         vscode.debug.addBreakpoints(breakpoints);
@@ -69,10 +78,12 @@ suite("Build Commands", function () {
     });
 
     test("Swift: Clean Build", async () => {
-        const buildPath = path.join(folderContext.folder.fsPath, ".build");
+        let result = await vscode.commands.executeCommand(Commands.RUN);
+        expect(result).to.be.true;
+
         const beforeItemCount = fs.readdirSync(buildPath).length;
 
-        const result = await vscode.commands.executeCommand(Commands.CLEAN_BUILD);
+        result = await vscode.commands.executeCommand(Commands.CLEAN_BUILD);
         expect(result).to.be.true;
 
         const afterItemCount = fs.readdirSync(buildPath).length;