Add e2e tests

Note: rushx only dispatches package.json scripts, so it's probably not necessary to add it as a distinct manager at all.

test/e2e/rushx.e2e.spec.js

@@ -0,0 +1,100 @@
+import { describe, it, before, beforeEach, afterEach } from "node:test";
+import { DockerTestContainer } from "./DockerTestContainer.js";
+import assert from "node:assert";
+
+describe("E2E: rushx coverage", () => {
+  let container;
+
+  before(async () => {
+    DockerTestContainer.buildImage();
+  });
+
+  beforeEach(async () => {
+    container = new DockerTestContainer();
+    await container.start();
+
+    const installationShell = await container.openShell("zsh");
+    await installationShell.runCommand("safe-chain setup");
+    await setupRushWorkspace(installationShell);
+  });
+
+  afterEach(async () => {
+    if (container) {
+      await container.stop();
+      container = null;
+    }
+  });
+
+  it("safe-chain successfully scans safe package downloads from rushx scripts", async () => {
+    const shell = await container.openShell("zsh");
+    const result = await shell.runCommand(
+      "cd /testapp/apps/test-app && rushx install-safe --safe-chain-logging=verbose"
+    );
+
+    assert.ok(
+      result.output.includes("no malware found."),
+      `Output did not include expected text. Output was:\n${result.output}`
+    );
+  });
+
+  it("safe-chain blocks malicious package downloads from rushx scripts", async () => {
+    const shell = await container.openShell("zsh");
+    const result = await shell.runCommand(
+      "cd /testapp/apps/test-app && rushx install-malicious"
+    );
+
+    assert.ok(
+      result.output.includes("blocked 1 malicious package downloads"),
+      `Output did not include expected text. Output was:\n${result.output}`
+    );
+    assert.ok(
+      result.output.includes("- safe-chain-test"),
+      `Output did not include expected text. Output was:\n${result.output}`
+    );
+    assert.ok(
+      result.output.includes("Exiting without installing malicious packages."),
+      `Output did not include expected text. Output was:\n${result.output}`
+    );
+  });
+});
+
+async function setupRushWorkspace(shell) {
+  await shell.runCommand("mkdir -p /testapp/common/config/rush /testapp/apps/test-app");
+  await shell.runCommand(`cat > /testapp/common/config/rush/rush.json <<'EOF'
+{
+  "$schema": "https://developer.microsoft.com/json-schemas/rush/v5/rush.schema.json",
+  "rushVersion": "5.175.1",
+  "pnpmVersion": "11.0.6",
+  "nodeSupportedVersionRange": ">=18.0.0",
+  "projectFolderMinDepth": 1,
+  "projectFolderMaxDepth": 2,
+  "gitPolicy": {},
+  "repository": {
+    "url": "https://example.com/testapp.git",
+    "defaultBranch": "main"
+  },
+  "eventHooks": {
+    "preRushInstall": [],
+    "postRushInstall": [],
+    "preRushBuild": [],
+    "postRushBuild": []
+  },
+  "projects": [
+    {
+      "packageName": "test-app",
+      "projectFolder": "apps/test-app"
+    }
+  ]
+}
+EOF`);
+  await shell.runCommand(`cat > /testapp/apps/test-app/package.json <<'EOF'
+{
+  "name": "test-app",
+  "version": "1.0.0",
+  "scripts": {
+    "install-safe": "npm install axios@1.13.0",
+    "install-malicious": "npm install safe-chain-test@0.0.1-security"
+  }
+}
+EOF`);
+}