Fixup types and tests

__tests__/main-prompt-integration.test.ts

@@ -1,31 +1,42 @@
 import { describe, it, expect, beforeEach, jest } from '@jest/globals'
-import * as core from '@actions/core'
+import * as core from '../__fixtures__/core.js'
-import * as fs from 'fs'
-import * as path from 'path'
-import { fileURLToPath } from 'url'
-import { run } from '../src/main'
 
-const __filename = fileURLToPath(import.meta.url)
+// Create fs mocks
-const __dirname = path.dirname(__filename)
+const mockExistsSync = jest.fn()
+const mockReadFileSync = jest.fn()
+const mockWriteFileSync = jest.fn()
 
-// Mock the action toolkit functions
+// Create inference mocks
-jest.mock('@actions/core')
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+const mockSimpleInference = jest.fn() as jest.MockedFunction<any>
+const mockMcpInference = jest.fn()
 
-// Mock fs to handle temporary file creation
+// Create MCP mocks
-jest.mock('fs')
+const mockConnectToGitHubMCP = jest.fn()
+
+// Mock fs module
+jest.unstable_mockModule('fs', () => ({
+  existsSync: mockExistsSync,
+  readFileSync: mockReadFileSync,
+  writeFileSync: mockWriteFileSync
+}))
 
 // Mock the inference functions
-jest.mock('../src/inference', () => ({
+jest.unstable_mockModule('../src/inference.js', () => ({
-  simpleInference: jest.fn(),
+  simpleInference: mockSimpleInference,
-  mcpInference: jest.fn()
+  mcpInference: mockMcpInference
 }))
 
 // Mock the MCP connection
-jest.mock('../src/mcp', () => ({
+jest.unstable_mockModule('../src/mcp.js', () => ({
-  connectToGitHubMCP: jest.fn()
+  connectToGitHubMCP: mockConnectToGitHubMCP
 }))
 
-import { simpleInference } from '../src/inference'
+jest.unstable_mockModule('@actions/core', () => core)
+
+// The module being tested should be imported dynamically. This ensures that the
+// mocks are used in place of any actual dependencies.
+const { run } = await import('../src/main.js')
 
 describe('main.ts - prompt.yml integration', () => {
   beforeEach(() => {
@@ -35,8 +46,7 @@ describe('main.ts - prompt.yml integration', () => {
     process.env['GITHUB_TOKEN'] = 'test-token'
 
     // Mock core.getInput to return appropriate values
-    const mockGetInput = core.getInput as jest.Mock
+    core.getInput.mockImplementation((name: string) => {
-    mockGetInput.mockImplementation((name: string) => {
       switch (name) {
         case 'model':
           return 'openai/gpt-4o'
@@ -55,12 +65,7 @@ describe('main.ts - prompt.yml integration', () => {
     const mockGetBooleanInput = core.getBooleanInput as jest.Mock
     mockGetBooleanInput.mockReturnValue(false)
 
-    // Mock fs.existsSync
-    const mockExistsSync = fs.existsSync as jest.Mock
-    mockExistsSync.mockReturnValue(true)
-
     // Mock fs.readFileSync for prompt file
-    const mockReadFileSync = fs.readFileSync as jest.Mock
     mockReadFileSync.mockReturnValue(`
 messages:
   - role: system
@@ -71,17 +76,15 @@ model: openai/gpt-4o
     `)
 
     // Mock fs.writeFileSync
-    const mockWriteFileSync = fs.writeFileSync as jest.Mock
     mockWriteFileSync.mockImplementation(() => {})
 
     // Mock simpleInference
-    const mockSimpleInference = simpleInference as jest.Mock
     mockSimpleInference.mockResolvedValue('Mocked AI response')
   })
 
   it('should handle prompt YAML files with template variables', async () => {
-    const mockGetInput = core.getInput as jest.Mock
+    mockExistsSync.mockReturnValue(true)
-    mockGetInput.mockImplementation((name: string) => {
+    core.getInput.mockImplementation((name: string) => {
       switch (name) {
         case 'prompt-file':
           return 'test.prompt.yml'
@@ -103,7 +106,6 @@ model: openai/gpt-4o
     await run()
 
     // Verify simpleInference was called with the correct message structure
-    const mockSimpleInference = simpleInference as jest.Mock
     expect(mockSimpleInference).toHaveBeenCalledWith(
       expect.objectContaining({
         messages: [
@@ -135,8 +137,8 @@ model: openai/gpt-4o
   })
 
   it('should fall back to legacy format when not using prompt YAML', async () => {
-    const mockGetInput = core.getInput as jest.Mock
+    mockExistsSync.mockReturnValue(false)
-    mockGetInput.mockImplementation((name: string) => {
+    core.getInput.mockImplementation((name: string) => {
       switch (name) {
         case 'prompt':
           return 'Hello, world!'
@@ -157,12 +159,19 @@ model: openai/gpt-4o
 
     await run()
 
-    // Verify simpleInference was called with legacy format
+    // Verify simpleInference was called with converted message format
-    const mockSimpleInference = simpleInference as jest.Mock
     expect(mockSimpleInference).toHaveBeenCalledWith(
       expect.objectContaining({
-        systemPrompt: 'You are helpful',
+        messages: [
-        prompt: 'Hello, world!',
+          {
+            role: 'system',
+            content: 'You are helpful'
+          },
+          {
+            role: 'user',
+            content: 'Hello, world!'
+          }
+        ],
         modelName: 'openai/gpt-4o',
         maxTokens: 200,
         endpoint: 'https://models.github.ai/inference',

src/helpers.ts

@@ -96,7 +96,9 @@ export function buildMessages(
 /**
  * Build response format object for API from prompt config
  */
-export function buildResponseFormat(promptConfig?: PromptConfig): any {
+export function buildResponseFormat(
+  promptConfig?: PromptConfig
+): { type: 'json_schema'; json_schema: unknown } | undefined {
   if (
     promptConfig?.responseFormat === 'json_schema' &&
     promptConfig.jsonSchema

src/inference.ts

@@ -1,16 +1,30 @@
 import * as core from '@actions/core'
 import ModelClient, { isUnexpected } from '@azure-rest/ai-inference'
 import { AzureKeyCredential } from '@azure/core-auth'
-import { GitHubMCPClient, executeToolCalls } from './mcp.js'
+import { GitHubMCPClient, executeToolCalls, MCPTool, ToolCall } from './mcp.js'
 import { handleUnexpectedResponse } from './helpers.js'
 
+interface ChatMessage {
+  role: string
+  content: string | null
+  tool_calls?: ToolCall[]
+}
+
+interface ChatCompletionsRequestBody {
+  messages: ChatMessage[]
+  max_tokens: number
+  model: string
+  response_format?: { type: 'json_schema'; json_schema: unknown }
+  tools?: MCPTool[]
+}
+
 export interface InferenceRequest {
   messages: Array<{ role: string; content: string }>
   modelName: string
   maxTokens: number
   endpoint: string
   token: string
-  responseFormat?: any // Will contain the processed response format for the API
+  responseFormat?: { type: 'json_schema'; json_schema: unknown } // Processed response format for the API
 }
 
 export interface InferenceResponse {
@@ -41,7 +55,7 @@ export async function simpleInference(
     }
   )
 
-  const requestBody: any = {
+  const requestBody: ChatCompletionsRequestBody = {
     messages: request.messages,
     max_tokens: request.maxTokens,
     model: request.modelName
@@ -84,7 +98,7 @@ export async function mcpInference(
   )
 
   // Start with the pre-processed messages
-  const messages: Array<any> = [...request.messages]
+  const messages: ChatMessage[] = [...request.messages]
 
   let iterationCount = 0
   const maxIterations = 5 // Prevent infinite loops
@@ -93,7 +107,7 @@ export async function mcpInference(
     iterationCount++
     core.info(`MCP inference iteration ${iterationCount}`)
 
-    const requestBody: any = {
+    const requestBody: ChatCompletionsRequestBody = {
       messages: messages,
       max_tokens: request.maxTokens,
       model: request.modelName,

src/main.ts

@@ -8,7 +8,8 @@ import { loadContentFromFileOrInput, buildInferenceRequest } from './helpers.js'
 import {
   loadPromptFile,
   parseTemplateVariables,
-  isPromptYamlFile
+  isPromptYamlFile,
+  PromptConfig
 } from './prompt.js'
 
 const RESPONSE_FILE = 'modelResponse.txt'
@@ -23,7 +24,7 @@ export async function run(): Promise<void> {
     const promptFilePath = core.getInput('prompt-file')
     const inputVariables = core.getInput('input')
 
-    let promptConfig: any = undefined
+    let promptConfig: PromptConfig | undefined = undefined
     let systemPrompt: string | undefined = undefined
     let prompt: string | undefined = undefined