add test

__tests__/main.test.ts

@@ -28,6 +28,14 @@ jest.unstable_mockModule('@azure-rest/ai-inference', () => ({
   isUnexpected: jest.fn(() => false)
 }))
 
+const mockExistsSync = jest.fn().mockReturnValue(true)
+const mockReadFileSync = jest.fn().mockReturnValue('Hello, AI!')
+
+jest.unstable_mockModule('fs', () => ({
+  existsSync: mockExistsSync,
+  readFileSync: mockReadFileSync
+}))
+
 jest.unstable_mockModule('@actions/core', () => core)
 
 // The module being tested should be imported dynamically. This ensures that the
@@ -35,7 +43,7 @@ jest.unstable_mockModule('@actions/core', () => core)
 const { run } = await import('../src/main.js')
 
 describe('main.ts', () => {
-  beforeEach(() => {
+  it('Sets the response output', async () => {
     // Set the action's inputs as return values from core.getInput().
     core.getInput.mockImplementation((name) => {
       if (name === 'prompt') return 'Hello, AI!'
@@ -43,13 +51,7 @@ describe('main.ts', () => {
       if (name === 'model_name') return 'gpt-4o'
       return ''
     })
-  })
 
-  afterEach(() => {
-    jest.resetAllMocks()
-  })
-
-  it('Sets the response output', async () => {
     await run()
 
     expect(core.setOutput).toHaveBeenNthCalledWith(
@@ -78,4 +80,29 @@ describe('main.ts', () => {
     // Verify that the action was marked as failed.
     expect(core.setFailed).toHaveBeenNthCalledWith(1, 'prompt is not set')
   })
+
+  it('uses prompt-file', async () => {
+    const promptFile = 'prompt.txt'
+    core.getInput.mockImplementation((name) => {
+      if (name === 'prompt-file') return promptFile
+      if (name === 'system-prompt') return 'You are a test assistant.'
+      if (name === 'model-name') return 'gpt-4o'
+      return ''
+    })
+
+    await run()
+
+    expect(mockExistsSync).toHaveBeenCalledWith(promptFile)
+    expect(mockReadFileSync).toHaveBeenCalledWith(promptFile, 'utf-8')
+    expect(core.setOutput).toHaveBeenNthCalledWith(
+      1,
+      'response',
+      'Hello, user!'
+    )
+    expect(core.setOutput).toHaveBeenNthCalledWith(
+      2,
+      'response-path',
+      expect.stringContaining('modelResponse.txt')
+    )
+  })
 })

dist/index.js

@@ -33560,14 +33560,18 @@ const RESPONSE_FILE = 'modelResponse.txt';
 async function run() {
     try {
         const promptFile = coreExports.getInput('prompt-file');
-        let prompt = coreExports.getInput('prompt');
+        const promptString = coreExports.getInput('prompt');
+        let prompt;
         if (promptFile !== undefined && promptFile !== '') {
             if (!fs.existsSync(promptFile)) {
                 throw new Error(`Prompt file not found: ${promptFile}`);
             }
             prompt = fs.readFileSync(promptFile, 'utf-8');
         }
-        if (prompt === undefined || prompt === '') {
+        else if (promptString !== undefined && promptString !== '') {
+            prompt = promptString;
+        }
+        else {
             throw new Error('prompt is not set');
         }
         const systemPrompt = coreExports.getInput('system-prompt');

src/main.ts

@@ -15,16 +15,17 @@ const RESPONSE_FILE = 'modelResponse.txt'
 export async function run(): Promise<void> {
   try {
     const promptFile: string = core.getInput('prompt-file')
-    let prompt: string = core.getInput('prompt')
+    const promptString: string = core.getInput('prompt')
 
+    let prompt: string
     if (promptFile !== undefined && promptFile !== '') {
       if (!fs.existsSync(promptFile)) {
         throw new Error(`Prompt file not found: ${promptFile}`)
       }
       prompt = fs.readFileSync(promptFile, 'utf-8')
-    }
-
-    if (prompt === undefined || prompt === '') {
+    } else if (promptString !== undefined && promptString !== '') {
+      prompt = promptString
+    } else {
       throw new Error('prompt is not set')
     }