Add Metro message command unit tests

test/extension/commands/reloadApp.test.ts

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for details.
+
+import assert = require("assert");
+import Sinon = require("sinon");
+import proxyquire = require("proxyquire");
+
+suite("reloadAppCommand", function () {
+    function createCommandModule(sendMessageToMetroStub: Sinon.SinonStub) {
+        class FakeCommand {
+            static formInstance(): any {
+                return new this();
+            }
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/reloadApp", {
+            "./util": {
+                sendMessageToMetro: sendMessageToMetroStub,
+            },
+            "./util/command": {
+                Command: FakeCommand,
+            },
+        }) as typeof import("../../../src/extension/commands/reloadApp");
+
+        return module.ReloadApp;
+    }
+
+    test("should send the reload message to Metro for the current project", async function () {
+        const sendMessageToMetroStub = Sinon.stub().returns(Promise.resolve());
+        const ReloadApp = createCommandModule(sendMessageToMetroStub);
+        const command = ReloadApp.formInstance();
+        const project = {};
+        (command as any).project = project;
+
+        await command.baseFn();
+
+        assert.strictEqual(sendMessageToMetroStub.calledWithExactly("reload", project), true);
+    });
+
+    test("should propagate errors from Metro", async function () {
+        const error = new Error("Metro connection failed");
+        const sendMessageToMetroStub = Sinon.stub().returns(Promise.reject(error));
+        const ReloadApp = createCommandModule(sendMessageToMetroStub);
+        const command = ReloadApp.formInstance();
+        (command as any).project = {};
+
+        await assert.rejects(() => command.baseFn(), error);
+    });
+});

test/extension/commands/showDevMenu.test.ts

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for details.
+
+import assert = require("assert");
+import Sinon = require("sinon");
+import proxyquire = require("proxyquire");
+
+suite("showDevMenuCommand", function () {
+    function createCommandModule(sendMessageToMetroStub: Sinon.SinonStub) {
+        class FakeCommand {
+            static formInstance(): any {
+                return new this();
+            }
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/showDevMenu", {
+            "./util": {
+                sendMessageToMetro: sendMessageToMetroStub,
+            },
+            "./util/command": {
+                Command: FakeCommand,
+            },
+        }) as typeof import("../../../src/extension/commands/showDevMenu");
+
+        return module.ShowDevMenu;
+    }
+
+    test("should send the devMenu message to Metro for the current project", async function () {
+        const sendMessageToMetroStub = Sinon.stub().returns(Promise.resolve());
+        const ShowDevMenu = createCommandModule(sendMessageToMetroStub);
+        const command = ShowDevMenu.formInstance();
+        const project = {};
+        (command as any).project = project;
+
+        await command.baseFn();
+
+        assert.strictEqual(sendMessageToMetroStub.calledWithExactly("devMenu", project), true);
+    });
+
+    test("should propagate errors from Metro", async function () {
+        const error = new Error("Metro connection failed");
+        const sendMessageToMetroStub = Sinon.stub().returns(Promise.reject(error));
+        const ShowDevMenu = createCommandModule(sendMessageToMetroStub);
+        const command = ShowDevMenu.formInstance();
+        (command as any).project = {};
+
+        await assert.rejects(() => command.baseFn(), error);
+    });
+});