Add PrebuildClean command unit test

test/extension/commands/prebuildClean.test.ts

@@ -0,0 +1,65 @@
+// 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("prebuildCleanCommand", function () {
+    function createMockProject(projectPath: string): any {
+        return {
+            getPackager: () => ({
+                getProjectPath: () => projectPath,
+            }),
+        };
+    }
+
+    test("should run expo prebuild clean from the project root", async function () {
+        const executeStub = Sinon.stub().returns(Promise.resolve());
+        const getChannelStub = Sinon.stub().returns({
+            info: Sinon.stub(),
+            error: Sinon.stub(),
+            warning: Sinon.stub(),
+            debug: Sinon.stub(),
+        });
+        const getNodeModulesRootStub = Sinon.stub().returns("/workspace/app/node_modules");
+        const constructorArgs: any[][] = [];
+
+        class FakeCommandExecutor {
+            constructor(...args: any[]) {
+                constructorArgs.push(args);
+            }
+
+            public execute = executeStub;
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/prebuildClean", {
+            "../../common/commandExecutor": {
+                CommandExecutor: FakeCommandExecutor,
+            },
+            "../appLauncher": {
+                AppLauncher: {
+                    getNodeModulesRootByProjectPath: getNodeModulesRootStub,
+                },
+            },
+            "../log/OutputChannelLogger": {
+                OutputChannelLogger: {
+                    getChannel: getChannelStub,
+                },
+            },
+        }) as typeof import("../../../src/extension/commands/prebuildClean");
+
+        const command = module.PrebuildClean.formInstance();
+        (command as any).project = createMockProject("/workspace/app");
+
+        await command.baseFn();
+
+        assert.strictEqual(getChannelStub.calledWithExactly("Expo Prebuild Clean", true), true);
+        assert.strictEqual(getNodeModulesRootStub.calledWithExactly("/workspace/app"), true);
+        assert.deepStrictEqual(constructorArgs[0].slice(0, 2), [
+            "/workspace/app/node_modules",
+            "/workspace/app",
+        ]);
+        assert.strictEqual(executeStub.calledWithExactly("npx expo prebuild --clean"), true);
+    });
+});