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Add C++ test file detection support for test generation #992

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Initial plan
Copilot Sep 9, 2025
fc0615b
Add C++ test file detection support
Copilot Sep 9, 2025
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20 changes: 20 additions & 0 deletions src/extension/prompt/node/test/testFiles.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,18 @@ suite.skipIf(process.platform === 'win32')('TestFileFinder', function () {
await assertTestFileFoundAsync(sourceFile, '/test/app/api/foo_test.rb');
});

test('returns a test for C++', async function () {
const sourceFile = '/project/src/Foo.cpp';
const testFile = '/project/tests/Foo_test.cpp';
await assertTestFileFoundAsync(sourceFile, testFile);
});

test('returns a test for C++ with different extension', async function () {
const sourceFile = '/project/src/Foo.cc';
const testFile = '/project/tests/FooTest.cc';
await assertTestFileFoundAsync(sourceFile, testFile);
});

test('determine java test file with absolute path', async () => {
await assertTestFileFoundAsync(
'/Users/copilot/git/commons-io/src/main/java/org/apache/commons/io/EndianUtils.java',
Expand Down Expand Up @@ -196,6 +208,14 @@ suite.skipIf(process.platform === 'win32')('TestFileFinder', function () {
{ filename: 'FooTest.java', isTestFile: true },
{ filename: 'Foo.cs', isTestFile: false },
{ filename: 'FooTest.cs', isTestFile: true },
{ filename: 'foo.cpp', isTestFile: false },
{ filename: 'foo_test.cpp', isTestFile: true },
{ filename: 'fooTest.cpp', isTestFile: true },
{ filename: 'foo.test.cpp', isTestFile: true },
{ filename: 'foo.cc', isTestFile: false },
{ filename: 'foo_test.cc', isTestFile: true },
{ filename: 'foo.cxx', isTestFile: false },
{ filename: 'foo_test.cxx', isTestFile: true },
{ filename: 'foo.xx', isTestFile: false },
{ filename: 'foo~Test.xx', isTestFile: true },
{ filename: 'foo.spec.xx', isTestFile: true },
Expand Down
4 changes: 4 additions & 0 deletions src/extension/prompt/node/testFiles.ts
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Expand Up @@ -25,6 +25,7 @@ const nullTestHint: Required<TestHint> = {
};

const testHintsByLanguage: Record<string, TestHint> = {
cpp: { suffixes: ['_test', 'Test', '.test'], location: 'testFolder' },
csharp: { suffixes: ['Test'], location: 'testFolder' },
dart: { suffixes: ['_test'], location: 'testFolder' },
go: { suffixes: ['_test'], location: 'sameFolder' },
Expand All @@ -43,6 +44,9 @@ const testHintsByLanguage: Record<string, TestHint> = {
};

export const suffix2Language: Record<string, keyof typeof testHintsByLanguage> = {
cpp: 'cpp',
cc: 'cpp',
cxx: 'cpp',
cs: 'csharp',
dart: 'dart',
go: 'go',
Expand Down
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