test: make planner lanes explicit

test/scripts/test-projects-lib.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, it } from "vitest";
+import { buildVitestArgs, parseTestProjectsArgs } from "../../scripts/test-projects-lib.mjs";
+
+describe("test-projects args", () => {
+  it("drops a pnpm passthrough separator while preserving targeted filters", () => {
+    expect(parseTestProjectsArgs(["--", "src/foo.test.ts", "-t", "target"])).toEqual({
+      forwardedArgs: ["src/foo.test.ts", "-t", "target"],
+      watchMode: false,
+    });
+  });
+
+  it("keeps watch mode explicit without leaking the sentinel to Vitest", () => {
+    expect(buildVitestArgs(["--watch", "--", "src/foo.test.ts"])).toEqual([
+      "exec",
+      "vitest",
+      "--config",
+      "vitest.projects.config.ts",
+      "src/foo.test.ts",
+    ]);
+  });
+
+  it("uses run mode by default", () => {
+    expect(buildVitestArgs(["src/foo.test.ts"])).toEqual([
+      "exec",
+      "vitest",
+      "run",
+      "--config",
+      "vitest.projects.config.ts",
+      "src/foo.test.ts",
+    ]);
+  });
+});