test(config-resolver): getRealRegion.spec.ts

Author: trivikr

packages/config-resolver/src/regionConfig/getRealRegion.spec.ts

@@ -0,0 +1,36 @@
+import { getRealRegion } from "./getRealRegion";
+import { isFipsRegion } from "./isFipsRegion";
+
+jest.mock("./isFipsRegion");
+
+describe(getRealRegion.name, () => {
+  beforeEach(() => {
+    (isFipsRegion as jest.Mock).mockReturnValue(true);
+  });
+
+  afterEach(() => {
+    expect(isFipsRegion).toHaveBeenCalledTimes(1);
+    jest.clearAllMocks();
+  });
+
+  it("returns provided region if it's not FIPS", () => {
+    const mockRegion = "mockRegion";
+    (isFipsRegion as jest.Mock).mockReturnValue(false);
+    expect(getRealRegion(mockRegion)).toStrictEqual(mockRegion);
+  });
+
+  describe("FIPS regions", () => {
+    it.each(["fips-aws-global", "aws-fips"])(`returns "us-east-1" for "%s"`, (input) => {
+      expect(getRealRegion(input)).toStrictEqual("us-east-1");
+    });
+
+    it.each([
+      ["us-west-1", "us-west-1-fips"],
+      ["us-west-1", "fips-us-west-1"],
+      ["us-west-1", "fips-dkr-us-west-1"],
+      ["us-west-1", "fips-prod-us-west-1"],
+    ])(`returns "%s" for "%s"`, (output, input) => {
+      expect(getRealRegion(input)).toStrictEqual(output);
+    });
+  });
+});