Fix baseline CLI build tests (#740)

Author: machty

packages/core/__tests__/cli/build.test.ts

@@ -15,7 +15,7 @@ import {
   setupCompositeProject,
 } from 'glint-monorepo-test-utils';
 
-describe.skip('CLI: single-pass build mode typechecking', () => {
+describe('CLI: single-pass build mode typechecking', () => {
   describe('simple projects using `--build`', () => {
     let project!: Project;
     beforeEach(async () => {
@@ -52,9 +52,12 @@ describe.skip('CLI: single-pass build mode typechecking', () => {
       expect(checkResult.exitCode).toBe(0);
       expect(checkResult.stdout).toEqual('');
       expect(checkResult.stderr).toEqual('');
+
+      // This tests that the `--emitDeclarationOnly` flag within project.build is working.
+      expect(existsSync(project.filePath('dist/index.gts.js'))).toBe(false);
     });
 
-    test('rejects a basic project with a template syntax error', async () => {
+    test.skip('rejects a basic project with a template syntax error', async () => {
       let code = stripIndent`
         import '@glint/environment-ember-template-imports';
         import Component from '@glimmer/component';
@@ -122,18 +125,20 @@ describe.skip('CLI: single-pass build mode typechecking', () => {
       let checkResult = await project.build({ reject: false });
 
       expect(checkResult.exitCode).toBe(1);
-      expect(checkResult.stdout).toEqual('');
-      expect(stripAnsi(checkResult.stderr)).toMatchInlineSnapshot(`
+      expect(stripAnsi(checkResult.stdout)).toMatchInlineSnapshot(`
         "src/index.gts:16:36 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
 
         16     The current time is {{truncate this.startupTime 12}}.
                                               ~~~~~~~~~~~~~~~~
+
+
+        Found 1 error.
         "
       `);
     });
   });
 
-  describe('composite projects', () => {
+  describe.skip('composite projects', () => {
     // The basic structure here is designed to give minimal coverage over all
     // interesting combinations of project invalidation:
     //

test-packages/test-utils/src/composite-project.ts

@@ -21,9 +21,13 @@ export const BASE_TS_CONFIG = {
     allowJs: true,
     checkJs: false,
     declaration: true,
-    emitDeclarationOnly: true,
+
+    // commented out for Volar; Volar-ized `tsc` variants (e.g. `vue-tsc` as well as `glint`)
+    // behave more closely to `tsc`, and it is expected for `noEmit` to be explicitly
+    // specified in CLI args.
+    // noEmit: false,
+
     incremental: true,
-    noEmit: false,
     noEmitOnError: true,
     outDir: OUT_DIR,
   },

test-packages/test-utils/src/project.ts

@@ -298,7 +298,7 @@ export class Project {
     // Not sure why this is needed, but in some contexts, `--pretty` is disabled
     // because TS doesn't detect a TTY setup.
     // https://github.com/microsoft/TypeScript/blob/c38569655bb151ec351c27032fbd3ef43b8856ba/src/compiler/executeCommandLine.ts#L160
-    options.flags = [...options.flags, '--pretty'];
+    options.flags = [...options.flags, '--noEmit', '--pretty'];
 
     return execaNode(require.resolve('@glint/core/bin/glint'), options.flags, {
       cwd: this.rootDir,
@@ -312,7 +312,7 @@ export class Project {
   }
 
   public build(options: Options & { flags?: string[] } = {}, debug = false): ExecaChildProcess {
-    let flags = ['--build', '--pretty', ...(options.flags ?? [])];
+    let flags = ['--build', '--emitDeclarationOnly', '--pretty', ...(options.flags ?? [])];
     return execaNode(require.resolve('@glint/core/bin/glint'), flags, {
       cwd: this.rootDir,
       nodeOptions: debug ? ['--inspect-brk'] : [],