Fix playwright-ct plugin, add coverage

fixtures/plugins/playwright-ct2/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "@fixtures/playwright-ct2",
+  "knip": {
+    "playwright-ct": true
+  },
+  "devDependencies": {
+    "@playwright/experimental-ct-vue": "*"
+  }
+}

fixtures/plugins/playwright-ct2/playwright-ct.config.ts

@@ -0,0 +1,11 @@
+const defineConfig = c => c;
+
+export default defineConfig({
+  testDir: './tests/component',
+  testMatch: ['**/*.spec.ts'],
+  projects: [
+    {
+      name: 'chromium',
+    },
+  ],
+});

fixtures/plugins/playwright-ct2/src/unused.spec.ts

@@ -0,0 +1,7 @@
+import { defineConfig, devices } from '@playwright/experimental-ct-vue';
+
+test.describe('stuff', () => {
+  test('thing', async () => {
+    expect(null).toMatch(null);
+  });
+});

fixtures/plugins/playwright-ct2/tests/component/some.spec.ts

@@ -0,0 +1,7 @@
+import { defineConfig, devices } from '@playwright/experimental-ct-vue';
+
+test.describe('stuff', () => {
+  test('thing', async () => {
+    expect(null).toMatch(null);
+  });
+});

src/plugins/playwright-ct/index.ts

@@ -1,7 +1,6 @@
-import { dirname, join } from '../../util/path.js';
 import { timerify } from '../../util/Performance.js';
 import { hasDependency, load } from '../../util/plugin.js';
-import { toEntryPattern } from '../../util/protocols.js';
+import { toEntryPatterns } from '../playwright/index.js';
 import type { GenericPluginCallback, IsPluginEnabledCallback } from '../../types/plugins.js';
 
 // https://playwright.dev/docs/test-components
@@ -18,11 +17,11 @@ export const CONFIG_FILE_PATTERNS = ['playwright-ct.config.{js,ts}', 'playwright
 /** @public */
 export const ENTRY_FILE_PATTERNS = ['**/*.@(spec|test).?(c|m)[jt]s?(x)'];
 
-const findPlaywrightCTDependencies: GenericPluginCallback = async configFilePath => {
-  const cfg = await load(configFilePath);
-  const dir = cfg.testDir ? join(dirname(configFilePath), cfg.testDir) : dirname(configFilePath);
-  const entryPatterns = (cfg.testMatch ? [cfg.testMatch] : ENTRY_FILE_PATTERNS).map(p => toEntryPattern(join(dir, p)));
-  return entryPatterns;
+const findPlaywrightCTDependencies: GenericPluginCallback = async (configFilePath, { cwd }) => {
+  const config = await load(configFilePath);
+  const entryPatterns = toEntryPatterns(config.testMatch, cwd, configFilePath, config);
+  if (entryPatterns.length > 0) return entryPatterns;
+  return toEntryPatterns(ENTRY_FILE_PATTERNS, cwd, configFilePath, config);
 };
 
 export const findDependencies = timerify(findPlaywrightCTDependencies);

src/plugins/playwright/index.ts

@@ -19,7 +19,7 @@ export const ENTRY_FILE_PATTERNS = ['**/*.@(spec|test).?(c|m)[jt]s?(x)'];
 
 export const CONFIG_FILE_PATTERNS = ['playwright.config.{js,ts}'];
 
-const toEntryPatterns = (
+export const toEntryPatterns = (
   testMatch: string | RegExp | Array<string | RegExp> | undefined,
   cwd: string,
   configFilePath: string,

tests/plugins/playwright-ct2.test.ts

@@ -0,0 +1,24 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { main } from '../../src/index.js';
+import { join, resolve } from '../../src/util/path.js';
+import baseArguments from '../helpers/baseArguments.js';
+import baseCounters from '../helpers/baseCounters.js';
+
+const cwd = resolve('fixtures/plugins/playwright-ct2');
+
+test('Find dependencies in Playwright for components configuration', async () => {
+  const { issues, counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert(issues.files.has(join(cwd, 'src/unused.spec.ts')));
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    files: 1,
+    processed: 3,
+    total: 3,
+  });
+});