tests: add main test

__tests__/main.test.ts

@@ -0,0 +1,39 @@
+import * as core from "@actions/core";
+import { getFilesByExtension } from "../src/utils/ExtensionFilter";
+import { processFiles } from "../src/utils/FileProcessor";
+import { run } from "../src/main";
+import { InputParams } from "../src/utils/VariableManager";
+
+jest.mock("@actions/core");
+jest.mock("../src/utils/ExtensionFilter");
+jest.mock("../src/utils/FileProcessor");
+jest.mock("path");
+
+const mockedCore = core as jest.Mocked<typeof core>;
+const mockedGetFilesByExtension = getFilesByExtension as jest.MockedFunction<typeof getFilesByExtension>;
+const mockedProcessFiles = processFiles as jest.MockedFunction<typeof processFiles>;
+const inputParams: InputParams = {
+  rootDir: "/root",
+  extension: ".ts",
+  envVars: new Map(),
+  ignoredDir: [],
+  ignoredVars: [],
+  includeSubDir: true,
+  encodings: "utf8"
+};
+
+beforeEach(() => {
+  jest.clearAllMocks();
+});
+
+test("run should process files when files are found", () => {
+  mockedGetFilesByExtension.mockReturnValue(["file1.ts", "file2.ts"]);
+  run(inputParams);
+  expect(mockedProcessFiles).toHaveBeenCalled();
+});
+
+test("run should warn when no files are found", () => {
+  mockedGetFilesByExtension.mockReturnValue([]);
+  run(inputParams);
+  expect(mockedCore.warning).toHaveBeenCalledWith(`No files found with extension ${inputParams.extension} in ${inputParams.rootDir}`);
+});