test: middleware detector

Author: omermecitoglu

src/core/middleware.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from "@jest/globals";
+import { detectMiddlewareName } from "./middleware";
+
+describe("detectMiddlewareName", () => {
+  it("should return the middleware name when present", () => {
+    const code = "const config = { middleware: authMiddleware }";
+    const result = detectMiddlewareName(code);
+    expect(result).toBe("authMiddleware");
+  });
+
+  it("should return null when middleware name is not present", () => {
+    const code = "const config = { handler: requestHandler }";
+    const result = detectMiddlewareName(code);
+    expect(result).toBeNull();
+  });
+
+  it("should return null when middleware key is present but no name is provided", () => {
+    const code = "const config = { middleware: }";
+    const result = detectMiddlewareName(code);
+    expect(result).toBeNull();
+  });
+
+  it("should return the correct middleware name when there are multiple properties", () => {
+    const code = "const config = { handler: requestHandler, middleware: loggingMiddleware, timeout: 5000 }";
+    const result = detectMiddlewareName(code);
+    expect(result).toBe("loggingMiddleware");
+  });
+
+  it("should handle code without spacing around the colon", () => {
+    const code = "const config = { middleware:errorHandler }";
+    const result = detectMiddlewareName(code);
+    expect(result).toBe("errorHandler");
+  });
+
+  it("should handle code with different spacing around the colon", () => {
+    const code = "const config = { middleware:  errorHandler }";
+    const result = detectMiddlewareName(code);
+    expect(result).toBe("errorHandler");
+  });
+});