test(cli): cover staged rule parity

packages/react-doctor/tests/e2e/staged-rule-parity.test.ts

@@ -0,0 +1,70 @@
+import { spawnSync } from "node:child_process";
+import * as fs from "node:fs";
+import os from "node:os";
+import * as path from "node:path";
+import { fileURLToPath } from "node:url";
+import { afterAll, describe, expect, it } from "vite-plus/test";
+import { initGitRepo, setupReactProject, writeFile } from "../regressions/_helpers.js";
+
+interface CliDiagnostic {
+  readonly plugin: string;
+  readonly rule: string;
+}
+
+interface CliReport {
+  readonly diagnostics: ReadonlyArray<CliDiagnostic>;
+}
+
+const currentDirectory = path.dirname(fileURLToPath(import.meta.url));
+const builtCliPath = path.resolve(currentDirectory, "../../dist/cli.js");
+const hasBuiltCli = fs.existsSync(builtCliPath);
+const temporaryRoot = fs.mkdtempSync(path.join(os.tmpdir(), "rd-staged-rule-parity-"));
+
+afterAll(() => {
+  fs.rmSync(temporaryRoot, { recursive: true, force: true });
+});
+
+const runJsonScan = (directory: string, argumentsList: ReadonlyArray<string>): CliReport => {
+  const result = spawnSync(process.execPath, [builtCliPath, ".", ...argumentsList], {
+    cwd: directory,
+    encoding: "utf8",
+    env: { ...process.env, CI: "1", FORCE_COLOR: "0" },
+  });
+
+  expect(result.status).toBe(1);
+  return JSON.parse(result.stdout);
+};
+
+const diagnosticRuleKeys = (report: CliReport): string[] =>
+  report.diagnostics.map((diagnostic) => `${diagnostic.plugin}/${diagnostic.rule}`);
+
+describe.skipIf(!hasBuiltCli)("staged rule parity", () => {
+  it("reports an enabled no-clone-element finding in a newly staged file", () => {
+    const projectDirectory = setupReactProject(temporaryRoot, "issue-1691", {
+      files: {
+        "doctor.config.json": `${JSON.stringify({
+          noScore: true,
+          rules: { "react-doctor/no-clone-element": "error" },
+        })}\n`,
+      },
+    });
+    initGitRepo(projectDirectory, { commit: true });
+
+    writeFile(
+      path.join(projectDirectory, "src/tab-pill.tsx"),
+      `import { cloneElement, type ReactElement } from "react";
+
+export const TabPill = ({ children }: { children: ReactElement }) =>
+  cloneElement(children, { className: "tab" });
+`,
+    );
+    spawnSync("git", ["add", "src/tab-pill.tsx"], { cwd: projectDirectory });
+
+    const commonArguments = ["--json", "--no-score", "--no-supply-chain", "--no-telemetry"];
+    const fullReport = runJsonScan(projectDirectory, ["--yes", ...commonArguments]);
+    const stagedReport = runJsonScan(projectDirectory, ["--staged", ...commonArguments]);
+
+    expect(diagnosticRuleKeys(fullReport)).toContain("react-doctor/no-clone-element");
+    expect(diagnosticRuleKeys(stagedReport)).toContain("react-doctor/no-clone-element");
+  }, 60_000);
+});