1 files changed, 172 insertions, 0 deletions

diff --git a/packages/turbo-codemod/__tests__/transform.test.ts b/packages/turbo-codemod/__tests__/transform.test.ts
new file mode 100644
index 0000000..abd015d
--- /dev/null
+++ b/packages/turbo-codemod/__tests__/transform.test.ts
@@ -0,0 +1,172 @@
+import transform from "../src/commands/transform";
+import { MigrateCommandArgument } from "../src/commands";
+import { setupTestFixtures, spyExit } from "@turbo/test-utils";
+import * as checkGitStatus from "../src/utils/checkGitStatus";
+import * as getPackageManager from "../src/utils/getPackageManager";
+import * as getPackageManagerVersion from "../src/utils/getPackageManagerVersion";
+
+describe("transform", () => {
+  const mockExit = spyExit();
+  const { useFixture } = setupTestFixtures({
+    directory: __dirname,
+    test: "transform",
+  });
+
+  it("runs the selected transform", async () => {
+    const { root, readJson } = useFixture({
+      fixture: "basic",
+    });
+
+    const packageManager = "pnpm";
+    const packageManagerVersion = "1.2.3";
+
+    // setup mocks
+    const mockedCheckGitStatus = jest
+      .spyOn(checkGitStatus, "default")
+      .mockReturnValue(undefined);
+    const mockedGetPackageManagerVersion = jest
+      .spyOn(getPackageManagerVersion, "default")
+      .mockReturnValue(packageManagerVersion);
+    const mockedGetPackageManager = jest
+      .spyOn(getPackageManager, "default")
+      .mockReturnValue(packageManager);
+
+    await transform(
+      "add-package-manager" as MigrateCommandArgument,
+      root as MigrateCommandArgument,
+      {
+        list: false,
+        force: false,
+        dry: false,
+        print: false,
+      }
+    );
+
+    expect(readJson("package.json")).toStrictEqual({
+      dependencies: {},
+      devDependencies: {
+        turbo: "1.0.0",
+      },
+      name: "transform-basic",
+      packageManager: "pnpm@1.2.3",
+      version: "1.0.0",
+    });
+
+    // verify mocks were called
+    expect(mockedCheckGitStatus).toHaveBeenCalled();
+    expect(mockedGetPackageManagerVersion).toHaveBeenCalled();
+    expect(mockedGetPackageManager).toHaveBeenCalled();
+
+    // restore mocks
+    mockedCheckGitStatus.mockRestore();
+    mockedGetPackageManagerVersion.mockRestore();
+    mockedGetPackageManager.mockRestore();
+  });
+
+  it("runs the selected transform - dry & print", async () => {
+    const { root, readJson } = useFixture({
+      fixture: "basic",
+    });
+
+    const packageManager = "pnpm";
+    const packageManagerVersion = "1.2.3";
+
+    // setup mocks
+    const mockedCheckGitStatus = jest
+      .spyOn(checkGitStatus, "default")
+      .mockReturnValue(undefined);
+    const mockedGetPackageManagerVersion = jest
+      .spyOn(getPackageManagerVersion, "default")
+      .mockReturnValue(packageManagerVersion);
+    const mockedGetPackageManager = jest
+      .spyOn(getPackageManager, "default")
+      .mockReturnValue(packageManager);
+
+    await transform(
+      "add-package-manager" as MigrateCommandArgument,
+      root as MigrateCommandArgument,
+      {
+        list: false,
+        force: false,
+        dry: true,
+        print: true,
+      }
+    );
+
+    expect(readJson("package.json")).toStrictEqual({
+      dependencies: {},
+      devDependencies: {
+        turbo: "1.0.0",
+      },
+      name: "transform-basic",
+      version: "1.0.0",
+    });
+
+    // verify mocks were called
+    expect(mockedCheckGitStatus).not.toHaveBeenCalled();
+    expect(mockedGetPackageManagerVersion).toHaveBeenCalled();
+    expect(mockedGetPackageManager).toHaveBeenCalled();
+
+    // restore mocks
+    mockedCheckGitStatus.mockRestore();
+    mockedGetPackageManagerVersion.mockRestore();
+    mockedGetPackageManager.mockRestore();
+  });
+
+  it("lists transforms", async () => {
+    const { root } = useFixture({
+      fixture: "basic",
+    });
+
+    await transform(
+      "add-package-manager" as MigrateCommandArgument,
+      root as MigrateCommandArgument,
+      {
+        list: true,
+        force: false,
+        dry: false,
+        print: false,
+      }
+    );
+
+    expect(mockExit.exit).toHaveBeenCalledWith(0);
+  });
+
+  it("exits on invalid transform", async () => {
+    const { root } = useFixture({
+      fixture: "basic",
+    });
+
+    await transform(
+      "not-a-real-option" as MigrateCommandArgument,
+      root as MigrateCommandArgument,
+      {
+        list: false,
+        force: false,
+        dry: false,
+        print: false,
+      }
+    );
+
+    expect(mockExit.exit).toHaveBeenCalledWith(1);
+  });
+
+  it("exits on invalid directory", async () => {
+    const { root } = useFixture({
+      fixture: "basic",
+    });
+
+    await transform(
+      "add-package-manager" as MigrateCommandArgument,
+      "~/path/that/does/not/exist" as MigrateCommandArgument,
+      {
+        list: false,
+        force: false,
+        dry: false,
+        print: false,
+      }
+    );
+
+    expect(mockExit.exit).toHaveBeenCalledWith(1);
+  });
+});