chore(config-resolver): add NodeUseDualstackEndpointConfigOptions

Author: trivikr

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

@@ -0,0 +1,51 @@
+import { booleanSelector, SelectorType } from "@aws-sdk/node-config-provider";
+
+import {
+  CONFIG_USE_DUALSTACK_ENDPOINT,
+  DEFAULT_USE_DUALSTACK_ENDPOINT,
+  ENV_USE_DUALSTACK_ENDPOINT,
+  NODE_USE_DUALSTACK_ENDPOINT_CONFIG_OPTIONS,
+} from "./NodeUseDualstackEndpointConfigOptions";
+
+jest.mock("@aws-sdk/node-config-provider");
+
+describe("NODE_USE_DUALSTACK_ENDPOINT_CONFIG_OPTIONS", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const test = (func: Function, obj: { [key: string]: string }, key: string, type: SelectorType) => {
+    it.each([true, false, undefined])("returns %s", (output) => {
+      (booleanSelector as jest.Mock).mockReturnValueOnce(output);
+      expect(func(obj)).toEqual(output);
+      expect(booleanSelector).toBeCalledWith(obj, key, type);
+    });
+
+    it("throws error", () => {
+      const mockError = new Error("error");
+      (booleanSelector as jest.Mock).mockImplementationOnce(() => {
+        throw mockError;
+      });
+      expect(() => {
+        func(obj);
+      }).toThrow(mockError);
+    });
+  };
+
+  describe("calls booleanSelector for environmentVariableSelector", () => {
+    const env: { [ENV_USE_DUALSTACK_ENDPOINT]: any } = {} as any;
+    const { environmentVariableSelector } = NODE_USE_DUALSTACK_ENDPOINT_CONFIG_OPTIONS;
+    test(environmentVariableSelector, env, ENV_USE_DUALSTACK_ENDPOINT, SelectorType.ENV);
+  });
+
+  describe("calls booleanSelector for configFileSelector", () => {
+    const profileContent: { [CONFIG_USE_DUALSTACK_ENDPOINT]: any } = {} as any;
+    const { configFileSelector } = NODE_USE_DUALSTACK_ENDPOINT_CONFIG_OPTIONS;
+    test(configFileSelector, profileContent, CONFIG_USE_DUALSTACK_ENDPOINT, SelectorType.CONFIG);
+  });
+
+  it("returns false for default", () => {
+    const { default: defaultValue } = NODE_USE_DUALSTACK_ENDPOINT_CONFIG_OPTIONS;
+    expect(defaultValue).toEqual(DEFAULT_USE_DUALSTACK_ENDPOINT);
+  });
+});

packages/config-resolver/src/regionConfig/NodeUseDualstackEndpointConfigOptions.ts

@@ -0,0 +1,13 @@
+import { LoadedConfigSelectors } from "@aws-sdk/node-config-provider";
+import { booleanSelector, SelectorType } from "@aws-sdk/node-config-provider";
+
+export const ENV_USE_DUALSTACK_ENDPOINT = "AWS_USE_DUALSTACK_ENDPOINT";
+export const CONFIG_USE_DUALSTACK_ENDPOINT = "use_dualstack_endpoint";
+export const DEFAULT_USE_DUALSTACK_ENDPOINT = false;
+
+export const NODE_USE_DUALSTACK_ENDPOINT_CONFIG_OPTIONS: LoadedConfigSelectors<boolean> = {
+  environmentVariableSelector: (env: NodeJS.ProcessEnv) =>
+    booleanSelector(env, ENV_USE_DUALSTACK_ENDPOINT, SelectorType.ENV),
+  configFileSelector: (profile) => booleanSelector(profile, CONFIG_USE_DUALSTACK_ENDPOINT, SelectorType.CONFIG),
+  default: false,
+};

packages/config-resolver/src/regionConfig/index.ts

@@ -1,3 +1,4 @@
+export * from "./NodeUseDualstackEndpointConfigOptions";
 export * from "./NodeUseFipsEndpointConfigOptions";
 export * from "./config";
 export * from "./resolveRegionConfig";