chore(config-resolver): add utility isFipsRegion

Author: trivikr

packages/config-resolver/src/regionInfo/isFipsRegion.spec.ts

@@ -0,0 +1,15 @@
+import { isFipsRegion } from "./isFipsRegion";
+
+describe(isFipsRegion.name, () => {
+  it.each([
+    [true, "fips-us-east-1"],
+    [true, "us-east-1-fips"],
+    [false, "us-east-1"],
+  ])(`returns %s for region "%s"`, (output, input) => {
+    expect(isFipsRegion(input)).toEqual(output);
+  });
+
+  it.each([undefined, null])("returns false for %s", (input) => {
+    expect(isFipsRegion(input)).toEqual(false);
+  });
+});

packages/config-resolver/src/regionInfo/isFipsRegion.ts

@@ -0,0 +1,2 @@
+export const isFipsRegion = (region: string) =>
+  typeof region === "string" && (region.startsWith("fips-") || region.endsWith("-fips"));