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Add test to make sure .d.ts files are ignored when checking for TypeScript #6858

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Merged
merged 1 commit into from
May 21, 2019
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Add test to make sure .d.ts files are ignored when checking for TypeScript #6858

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8 changes: 8 additions & 0 deletions test/fixtures/issue-5947-not-typescript/index.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ test('Ignores node_modules when detecting TypeScript', async () => {
'package',
'index.ts',
];
const dtsSrcPath = [testSetup.testDirectory, 'src', 'types', 'index.d.ts'];
const tsSrcPath = path.join(testSetup.testDirectory, 'src', 'index.ts');

// Step 1.
Expand All @@ -28,6 +29,13 @@ test('Ignores node_modules when detecting TypeScript', async () => {
await testSetup.scripts.build();
expect(fs.existsSync(tsConfigPath)).toBe(false);

// Step 1b.
// See if src/types/index.d.ts is treated as a JS project
fs.mkdirSync(path.join(...dtsSrcPath.slice(0, 3)));
fs.writeFileSync(path.join(...dtsSrcPath));
await testSetup.scripts.build();
expect(fs.existsSync(tsConfigPath)).toBe(false);

// Step 2.
// Add TS and ensure tsconfig.json is generated
fs.writeFileSync(tsSrcPath);
Expand Down