1 files changed, 109 insertions, 0 deletions

diff --git a/packages/turbo-ignore/__tests__/args.test.ts b/packages/turbo-ignore/__tests__/args.test.ts
new file mode 100644
index 0000000..f546247
--- /dev/null
+++ b/packages/turbo-ignore/__tests__/args.test.ts
@@ -0,0 +1,109 @@
+import parseArgs, { help } from "../src/args";
+import pkg from "../package.json";
+import { spyConsole, spyExit } from "@turbo/test-utils";
+
+describe("parseArgs()", () => {
+  const mockConsole = spyConsole();
+  const mockExit = spyExit();
+
+  it("does not throw with no args", async () => {
+    const result = parseArgs({ argv: [] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe(undefined);
+  });
+
+  it("outputs help text (--help)", async () => {
+    parseArgs({ argv: ["--help"] });
+    expect(mockExit.exit).toHaveBeenCalledWith(0);
+    expect(mockConsole.log).toHaveBeenCalledWith(help);
+  });
+
+  it("outputs help text (-h)", async () => {
+    parseArgs({ argv: ["-h"] });
+    expect(mockExit.exit).toHaveBeenCalledWith(0);
+    expect(mockConsole.log).toHaveBeenCalledWith(help);
+  });
+
+  it("outputs version text (--version)", async () => {
+    parseArgs({ argv: ["--version"] });
+    expect(mockExit.exit).toHaveBeenCalledWith(0);
+    expect(mockConsole.log).toHaveBeenCalledWith(pkg.version);
+  });
+
+  it("outputs version text (-v)", async () => {
+    parseArgs({ argv: ["-v"] });
+    expect(mockExit.exit).toHaveBeenCalledWith(0);
+    expect(mockConsole.log).toHaveBeenCalledWith(pkg.version);
+  });
+
+  it("correctly finds workspace", async () => {
+    const result = parseArgs({ argv: ["this-workspace"] });
+    expect(result.workspace).toBe("this-workspace");
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe(undefined);
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("correctly finds fallback", async () => {
+    const result = parseArgs({ argv: ["--fallback=HEAD^"] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe("HEAD^");
+    expect(result.task).toBe(undefined);
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("correctly finds task", async () => {
+    const result = parseArgs({ argv: ["--task=some-workspace#build"] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe("some-workspace#build");
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("uses default fallback if incorrectly specified", async () => {
+    const result = parseArgs({ argv: ["--fallback"] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe(undefined);
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("uses default fallback if empty string", async () => {
+    const result = parseArgs({ argv: ["--fallback="] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe(undefined);
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("uses default task if incorrectly specified", async () => {
+    const result = parseArgs({ argv: ["--task"] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe(undefined);
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("uses default task if empty string", async () => {
+    const result = parseArgs({ argv: ["--task="] });
+    expect(result.workspace).toBe(undefined);
+    expect(result.fallback).toBe(undefined);
+    expect(result.task).toBe(undefined);
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+
+  it("correctly finds fallback and workspace", async () => {
+    const result = parseArgs({
+      argv: [
+        "this-workspace",
+        "--fallback=HEAD~10",
+        "--task=some-workspace#build",
+      ],
+    });
+    expect(result.workspace).toBe("this-workspace");
+    expect(result.fallback).toBe("HEAD~10");
+    expect(result.task).toBe("some-workspace#build");
+    expect(mockExit.exit).toHaveBeenCalledTimes(0);
+  });
+});