ci: optimize pr-check-secondary-examples workflow (#1949)

- Restrict push trigger to main; add paths filter for examples/**, src/**, and the workflow file itself
- Add concurrency group to cancel stale runs
- Replace inline bash with two-phase Node.js script (changed examples first, then rest)
- Use spawnSync with arg array for uv run -m (fixes Codacy command injection warning)
- Reuse git ls-files pattern from pr-check-test-files.js
- Add Jest with 18 test scenarios; runs before Solo network spins up
- Add timeout-minutes: 30

Signed-off-by: IGwork <mounilkankhara@gmail.com>

Author: Mounil2005

.github/scripts/__tests__/pr-check-secondary-examples.test.js

@@ -0,0 +1,214 @@
+jest.mock("child_process", () => ({
+    execSync: jest.fn(),
+    spawnSync: jest.fn(),
+}));
+
+const { execSync, spawnSync } = require("child_process");
+
+const {
+    toModule,
+    getAllExamples,
+    getChangedExamples,
+    runExample,
+    runAll,
+    computeExecutionPlan,
+} = require("../pr-check-secondary-examples");
+
+// ---------------------------------------------------------------------------
+// toModule
+// ---------------------------------------------------------------------------
+describe("toModule", () => {
+    test("converts nested path to module", () => {
+        expect(toModule("examples/a/b.py")).toBe("examples.a.b");
+    });
+
+    test("converts root-level example path to module", () => {
+        expect(toModule("examples/foo.py")).toBe("examples.foo");
+    });
+});
+
+// ---------------------------------------------------------------------------
+// getAllExamples
+// ---------------------------------------------------------------------------
+describe("getAllExamples", () => {
+    beforeEach(() => jest.clearAllMocks());
+
+    test("returns list of example files", () => {
+        execSync.mockReturnValueOnce("examples/a.py\nexamples/b/c.py\n");
+
+        expect(getAllExamples()).toEqual(["examples/a.py", "examples/b/c.py"]);
+    });
+
+    test("excludes __init__.py files", () => {
+        execSync.mockReturnValueOnce("examples/a.py\nexamples/__init__.py\nexamples/b.py\n");
+
+        expect(getAllExamples()).toEqual(["examples/a.py", "examples/b.py"]);
+    });
+
+    test("returns empty array when git ls-files produces no output", () => {
+        execSync.mockReturnValueOnce("");
+
+        expect(getAllExamples()).toEqual([]);
+    });
+});
+
+// ---------------------------------------------------------------------------
+// getChangedExamples
+// ---------------------------------------------------------------------------
+describe("getChangedExamples", () => {
+    const ORIG_ENV = process.env;
+
+    beforeEach(() => {
+        jest.clearAllMocks();
+        process.env = { ...ORIG_ENV };
+    });
+
+    afterEach(() => {
+        process.env = ORIG_ENV;
+    });
+
+    test("returns empty array when GITHUB_BASE_REF is not set", () => {
+        delete process.env.GITHUB_BASE_REF;
+
+        expect(getChangedExamples()).toEqual([]);
+        expect(execSync).not.toHaveBeenCalled();
+    });
+
+    test("returns only changed example .py files", () => {
+        process.env.GITHUB_BASE_REF = "main";
+        execSync
+            .mockReturnValueOnce("") // git fetch
+            .mockReturnValueOnce("examples/a.py\nsrc/foo.py\nexamples/b.py\nREADME.md\n");
+
+        expect(getChangedExamples()).toEqual(["examples/a.py", "examples/b.py"]);
+    });
+
+    test("filters out non-.py files under examples/", () => {
+        process.env.GITHUB_BASE_REF = "main";
+        execSync
+            .mockReturnValueOnce("")
+            .mockReturnValueOnce("examples/a.py\nexamples/data.json\nexamples/b.py\n");
+
+        expect(getChangedExamples()).toEqual(["examples/a.py", "examples/b.py"]);
+    });
+
+    test("returns empty array when diff is empty", () => {
+        process.env.GITHUB_BASE_REF = "main";
+        execSync
+            .mockReturnValueOnce("")
+            .mockReturnValueOnce("");
+
+        expect(getChangedExamples()).toEqual([]);
+    });
+
+    test("returns empty array when execSync throws", () => {
+        process.env.GITHUB_BASE_REF = "main";
+        execSync.mockImplementationOnce(() => { throw new Error("git failed"); });
+
+        expect(getChangedExamples()).toEqual([]);
+    });
+});
+
+// ---------------------------------------------------------------------------
+// computeExecutionPlan
+// ---------------------------------------------------------------------------
+describe("computeExecutionPlan", () => {
+    test("removes changed files from remaining", () => {
+        const all = ["examples/a.py", "examples/b.py"];
+        const changed = ["examples/b.py"];
+
+        const { remaining } = computeExecutionPlan(all, changed);
+
+        expect(remaining).toEqual(["examples/a.py"]);
+    });
+
+    test("remaining is all files when nothing changed", () => {
+        const all = ["examples/a.py", "examples/b.py"];
+
+        const { remaining } = computeExecutionPlan(all, []);
+
+        expect(remaining).toEqual(all);
+    });
+
+    test("remaining is empty when all files changed", () => {
+        const all = ["examples/a.py", "examples/b.py"];
+
+        const { remaining } = computeExecutionPlan(all, all);
+
+        expect(remaining).toEqual([]);
+    });
+});
+
+// ---------------------------------------------------------------------------
+// runExample
+// ---------------------------------------------------------------------------
+describe("runExample", () => {
+    beforeEach(() => jest.clearAllMocks());
+
+    test("runs successfully", () => {
+        spawnSync.mockReturnValue({ status: 0 });
+
+        expect(() => runExample("examples/a.py")).not.toThrow();
+
+        expect(spawnSync).toHaveBeenCalledWith(
+            "uv",
+            ["run", "-m", "examples.a"],
+            expect.objectContaining({ stdio: "inherit" })
+        );
+    });
+
+    test("fails and exits with code 1", () => {
+        spawnSync.mockReturnValue({ status: 1 });
+
+        const exitSpy = jest
+            .spyOn(process, "exit")
+            .mockImplementation(() => { throw new Error("exit"); });
+
+        expect(() => runExample("examples/a.py")).toThrow("exit");
+        expect(exitSpy).toHaveBeenCalledWith(1);
+
+        exitSpy.mockRestore();
+    });
+});
+
+// ---------------------------------------------------------------------------
+// runAll
+// ---------------------------------------------------------------------------
+describe("runAll", () => {
+    beforeEach(() => jest.clearAllMocks());
+
+    test("runs all files in order", () => {
+        spawnSync.mockReturnValue({ status: 0 });
+
+        runAll(["examples/a.py", "examples/b.py"]);
+
+        expect(spawnSync).toHaveBeenCalledTimes(2);
+        expect(spawnSync).toHaveBeenNthCalledWith(1, "uv", ["run", "-m", "examples.a"], expect.anything());
+        expect(spawnSync).toHaveBeenNthCalledWith(2, "uv", ["run", "-m", "examples.b"], expect.anything());
+    });
+
+    test("stops on first failure and does not run subsequent files", () => {
+        spawnSync
+            .mockReturnValueOnce({ status: 0 })
+            .mockReturnValueOnce({ status: 1 });
+
+        const exitSpy = jest
+            .spyOn(process, "exit")
+            .mockImplementation(() => { throw new Error("exit"); });
+
+        expect(() =>
+            runAll(["examples/a.py", "examples/b.py", "examples/c.py"])
+        ).toThrow("exit");
+
+        expect(exitSpy).toHaveBeenCalledWith(1);
+        expect(spawnSync).toHaveBeenCalledTimes(2);
+
+        exitSpy.mockRestore();
+    });
+
+    test("does nothing for empty list", () => {
+        runAll([]);
+
+        expect(spawnSync).not.toHaveBeenCalled();
+    });
+});