Initial Commit

packages/testkit/testing/testing-integration/src/fixture/service-fixture.test.ts

@@ -0,0 +1,38 @@
+import { describe, expectTypeOf, it } from "@suaveplan/testing/runner";
+import type { InferConfig, ServiceFixture } from "./service-fixture.js";
+
+describe("ServiceFixture interface", () => {
+    it("enforces the ServiceFixture<TConfig> shape", { timeout: 5000 }, () => {
+        type ExampleConfig = { host: string; port: number };
+        const fixture: ServiceFixture<ExampleConfig> = {
+            name: "example",
+            start: async () => ({ host: "localhost", port: 1234 }),
+            stop: async () => {},
+            healthCheck: async () => true,
+        };
+        expectTypeOf(fixture.name).toEqualTypeOf<string>();
+        expectTypeOf(fixture.start).toEqualTypeOf<
+            () => Promise<ExampleConfig>
+        >();
+        expectTypeOf(fixture.stop).toEqualTypeOf<() => Promise<void>>();
+        expectTypeOf(fixture.healthCheck).toEqualTypeOf<
+            () => Promise<boolean>
+        >();
+    });
+
+    it("InferConfig extracts TConfig from a ServiceFixture implementation", {
+        timeout: 5000,
+    }, () => {
+        type ExampleConfig = { endpoint: string; apiKey: string };
+        interface MyFixture extends ServiceFixture<ExampleConfig> {}
+        type Extracted = InferConfig<MyFixture>;
+        expectTypeOf<Extracted>().toEqualTypeOf<ExampleConfig>();
+    });
+
+    it("InferConfig returns never for non-ServiceFixture types", {
+        timeout: 5000,
+    }, () => {
+        type Extracted = InferConfig<string>;
+        expectTypeOf<Extracted>().toEqualTypeOf<never>();
+    });
+});