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🤖 ci: add robust Electron E2E tests for regression prevention (#884)
## Summary Add comprehensive E2E tests covering window lifecycle, IPC robustness, streaming edge cases, persistence, and error display. These tests target recent regression patterns. ## Recent Regressions Addressed | Regression | Test Coverage | |------------|---------------| | `MockBrowserWindow.isDestroyed()` (#863) | IPC stability tests verify no crashes during heavy IPC | | IPC send to destroyed window (#859) | `ipcRobustness.spec.ts` - concurrent IPC operations | | Duplicate IPC handler registration (#851) | `windowLifecycle.spec.ts` - rapid IPC calls test | | Stream error handling (#880) | `streamEdgeCases.spec.ts` + `errorDisplay.spec.ts` | ## New Test Files (26 tests total) - **windowLifecycle.spec.ts** (6 tests): window operations, IPC stability under load - **ipcRobustness.spec.ts** (4 tests): concurrent IPC calls, state preservation - **streamEdgeCases.spec.ts** (6 tests): streaming during UI operations, error scenarios - **persistence.spec.ts** (4 tests): chat history, settings, mode persistence - **errorDisplay.spec.ts** (6 tests): error messages display, recovery flows ## Infrastructure Changes - **Error mock scenarios**: rate limit, server error, network error scenarios - **Stream timeline capture**: now handles `stream-error` events (previously only `stream-end`) - **CI matrix**: Linux (comprehensive, 47 tests) + macOS (window lifecycle, 6 tests) ## CI Configuration ```yaml matrix: include: - os: linux # Comprehensive E2E tests - os: macos # Window lifecycle tests only (platform-dependent) ``` _Generated with `mux`_
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‎.github/actions/setup-playwright/action.yml‎

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@@ -12,8 +12,8 @@ runs:
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id: playwright-version
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shell: bash
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run: |
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# Extract Playwright version from bun.lock
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VERSION=$(grep -A1 '"playwright":' bun.lock | grep -oP '"\K[0-9]+\.[0-9]+\.[0-9]+' | head -1)
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# Extract Playwright version from bun.lock (macOS-compatible regex)
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VERSION=$(grep -A1 '"playwright":' bun.lock | grep -oE '[0-9]+\.[0-9]+\.[0-9]+' | head -1)
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echo "version=$VERSION" >> $GITHUB_OUTPUT
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echo "Playwright version: $VERSION"
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@@ -31,6 +31,7 @@ runs:
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shell: bash
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run: bun x playwright install ${{ inputs.browsers }}
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- name: Install Playwright system dependencies
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- name: Install Playwright system dependencies (Linux)
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if: runner.os == 'Linux'
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shell: bash
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run: bun x playwright install-deps ${{ inputs.browsers }}

‎.github/workflows/ci.yml‎

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@@ -148,9 +148,21 @@ jobs:
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run: make test-storybook
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e2e-test:
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name: End-to-End Tests
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runs-on: ${{ github.repository_owner == 'coder' && 'depot-ubuntu-22.04-16' || 'ubuntu-latest' }}
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name: E2E Tests (${{ matrix.os }})
153152
if: github.event.inputs.test_filter == ''
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strategy:
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fail-fast: false
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matrix:
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include:
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# Linux: comprehensive E2E tests
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- os: linux
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runner: ${{ github.repository_owner == 'coder' && 'depot-ubuntu-22.04-16' || 'ubuntu-latest' }}
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test_scope: "all"
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# macOS: window lifecycle and platform-dependent tests only
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- os: macos
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runner: ${{ github.repository_owner == 'coder' && 'depot-macos-latest' || 'macos-latest' }}
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test_scope: "window-lifecycle"
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runs-on: ${{ matrix.runner }}
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steps:
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- name: Checkout code
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uses: actions/checkout@v4
@@ -159,18 +171,24 @@ jobs:
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- uses: ./.github/actions/setup-mux
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- name: Install xvfb
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- name: Install xvfb (Linux)
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if: matrix.os == 'linux'
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run: |
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sudo apt-get update
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sudo apt-get install -y xvfb
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- uses: ./.github/actions/setup-playwright
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- name: Run e2e tests
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- name: Run comprehensive e2e tests (Linux)
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if: matrix.os == 'linux'
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run: xvfb-run -a make test-e2e
171185
env:
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ELECTRON_DISABLE_SANDBOX: 1
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- name: Run window lifecycle e2e tests (macOS)
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if: matrix.os == 'macos'
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run: make test-e2e PLAYWRIGHT_ARGS="tests/e2e/scenarios/windowLifecycle.spec.ts"
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docker-smoke-test:
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name: Docker Smoke Test
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runs-on: ${{ github.repository_owner == 'coder' && 'depot-ubuntu-22.04-16' || 'ubuntu-latest' }}

‎src/node/services/mock/scenarios.ts‎

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@@ -3,6 +3,7 @@ import * as review from "./scenarios/review";
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import * as toolFlows from "./scenarios/toolFlows";
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import * as slashCommands from "./scenarios/slashCommands";
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import * as permissionModes from "./scenarios/permissionModes";
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import * as errorScenarios from "./scenarios/errorScenarios";
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import type { ScenarioTurn } from "./scenarioTypes";
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export const allScenarios: ScenarioTurn[] = [
@@ -11,4 +12,5 @@ export const allScenarios: ScenarioTurn[] = [
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...toolFlows.scenarios,
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...slashCommands.scenarios,
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...permissionModes.scenarios,
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...errorScenarios.scenarios,
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];

‎src/node/services/mock/scenarios/errorScenarios.ts‎

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import type { ScenarioTurn } from "@/node/services/mock/scenarioTypes";
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import { STREAM_BASE_DELAY } from "@/node/services/mock/scenarioTypes";
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import { KNOWN_MODELS } from "@/common/constants/knownModels";
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export const ERROR_PROMPTS = {
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TRIGGER_RATE_LIMIT: "Trigger rate limit error",
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TRIGGER_API_ERROR: "Trigger API error",
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TRIGGER_NETWORK_ERROR: "Trigger network error",
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} as const;
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11+
export const ERROR_MESSAGES = {
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RATE_LIMIT: "Rate limit exceeded. Please retry after 60 seconds.",
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API_ERROR: "Internal server error occurred while processing the request.",
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NETWORK_ERROR: "Network connection lost. Please check your internet connection.",
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} as const;
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const rateLimitErrorTurn: ScenarioTurn = {
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user: {
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text: ERROR_PROMPTS.TRIGGER_RATE_LIMIT,
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thinkingLevel: "low",
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mode: "exec",
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},
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assistant: {
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messageId: "msg-error-ratelimit",
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events: [
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{
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kind: "stream-start",
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delay: 0,
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messageId: "msg-error-ratelimit",
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model: KNOWN_MODELS.GPT.id,
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},
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{
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kind: "stream-delta",
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delay: STREAM_BASE_DELAY,
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text: "Processing your request...",
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},
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{
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kind: "stream-error",
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delay: STREAM_BASE_DELAY * 2,
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error: ERROR_MESSAGES.RATE_LIMIT,
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errorType: "rate_limit",
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},
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],
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},
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};
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const apiErrorTurn: ScenarioTurn = {
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user: {
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text: ERROR_PROMPTS.TRIGGER_API_ERROR,
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thinkingLevel: "low",
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mode: "exec",
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},
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assistant: {
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messageId: "msg-error-api",
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events: [
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{
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kind: "stream-start",
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delay: 0,
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messageId: "msg-error-api",
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model: KNOWN_MODELS.GPT.id,
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},
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{
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kind: "stream-error",
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delay: STREAM_BASE_DELAY,
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error: ERROR_MESSAGES.API_ERROR,
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errorType: "server_error",
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},
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],
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},
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};
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const networkErrorTurn: ScenarioTurn = {
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user: {
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text: ERROR_PROMPTS.TRIGGER_NETWORK_ERROR,
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thinkingLevel: "low",
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mode: "exec",
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},
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assistant: {
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messageId: "msg-error-network",
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events: [
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{
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kind: "stream-start",
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delay: 0,
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messageId: "msg-error-network",
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model: KNOWN_MODELS.GPT.id,
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},
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{
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kind: "stream-error",
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delay: STREAM_BASE_DELAY,
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error: ERROR_MESSAGES.NETWORK_ERROR,
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errorType: "network",
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},
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],
94+
},
95+
};
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97+
export const scenarios: ScenarioTurn[] = [rateLimitErrorTurn, apiErrorTurn, networkErrorTurn];

‎tests/e2e/scenarios/persistence.spec.ts‎

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1+
import { electronTest as test, electronExpect as expect } from "../electronTest";
2+
import { LIST_PROGRAMMING_LANGUAGES } from "@/node/services/mock/scenarios/basicChat";
3+
4+
test.skip(
5+
({ browserName }) => browserName !== "chromium",
6+
"Electron scenario runs on chromium only"
7+
);
8+
9+
test.describe("persistence", () => {
10+
test("chat history persists across page reload", async ({ ui, page }) => {
11+
await ui.projects.openFirstWorkspace();
12+
13+
await ui.chat.captureStreamTimeline(async () => {
14+
await ui.chat.sendMessage(LIST_PROGRAMMING_LANGUAGES);
15+
});
16+
await ui.chat.expectTranscriptContains("Python");
17+
18+
await page.reload();
19+
await page.waitForLoadState("domcontentloaded");
20+
await ui.projects.openFirstWorkspace();
21+
22+
await ui.chat.expectTranscriptContains("Python");
23+
});
24+
25+
test("chat history survives settings navigation", async ({ ui }) => {
26+
await ui.projects.openFirstWorkspace();
27+
28+
await ui.chat.captureStreamTimeline(async () => {
29+
await ui.chat.sendMessage(LIST_PROGRAMMING_LANGUAGES);
30+
});
31+
32+
// Navigate through settings (potential state corruption points)
33+
await ui.settings.open();
34+
await ui.settings.selectSection("Models");
35+
await ui.settings.selectSection("Providers");
36+
await ui.settings.close();
37+
38+
await ui.chat.expectTranscriptContains("Python");
39+
await ui.chat.expectTranscriptContains("JavaScript");
40+
});
41+
});

‎tests/e2e/scenarios/streamingBehavior.spec.ts‎

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1+
import { electronTest as test, electronExpect as expect } from "../electronTest";
2+
import { LIST_PROGRAMMING_LANGUAGES } from "@/node/services/mock/scenarios/basicChat";
3+
import { ERROR_PROMPTS, ERROR_MESSAGES } from "@/node/services/mock/scenarios/errorScenarios";
4+
5+
test.skip(
6+
({ browserName }) => browserName !== "chromium",
7+
"Electron scenario runs on chromium only"
8+
);
9+
10+
test.describe("streaming behavior", () => {
11+
test("stream continues after settings modal opens", async ({ ui, page }) => {
12+
await ui.projects.openFirstWorkspace();
13+
14+
const streamPromise = ui.chat.captureStreamTimeline(async () => {
15+
await ui.chat.sendMessage(LIST_PROGRAMMING_LANGUAGES);
16+
});
17+
18+
await page.waitForTimeout(50);
19+
await ui.settings.open();
20+
const timeline = await streamPromise;
21+
await ui.settings.close();
22+
23+
expect(timeline.events.some((e) => e.type === "stream-end")).toBe(true);
24+
await ui.chat.expectTranscriptContains("Python");
25+
});
26+
27+
test("mode switching doesn't break streaming", async ({ ui }) => {
28+
await ui.projects.openFirstWorkspace();
29+
30+
await ui.chat.setMode("Exec");
31+
await ui.chat.setMode("Plan");
32+
33+
const timeline = await ui.chat.captureStreamTimeline(async () => {
34+
await ui.chat.sendMessage(LIST_PROGRAMMING_LANGUAGES);
35+
});
36+
37+
expect(timeline.events.some((e) => e.type === "stream-end")).toBe(true);
38+
await ui.chat.expectTranscriptContains("Python");
39+
});
40+
41+
// Consolidate error tests using parameterization
42+
for (const [errorType, prompt, expectedMessage] of [
43+
["rate limit", ERROR_PROMPTS.TRIGGER_RATE_LIMIT, ERROR_MESSAGES.RATE_LIMIT],
44+
["server", ERROR_PROMPTS.TRIGGER_API_ERROR, ERROR_MESSAGES.API_ERROR],
45+
["network", ERROR_PROMPTS.TRIGGER_NETWORK_ERROR, ERROR_MESSAGES.NETWORK_ERROR],
46+
] as const) {
47+
test(`${errorType} error displays in transcript`, async ({ ui, page }) => {
48+
await ui.projects.openFirstWorkspace();
49+
await ui.chat.setMode("Exec");
50+
51+
const timeline = await ui.chat.captureStreamTimeline(async () => {
52+
await ui.chat.sendMessage(prompt);
53+
});
54+
55+
expect(timeline.events.some((e) => e.type === "stream-error")).toBe(true);
56+
const transcript = page.getByRole("log", { name: "Conversation transcript" });
57+
await expect(transcript.getByText(expectedMessage)).toBeVisible();
58+
});
59+
}
60+
61+
test("app recovers after error", async ({ ui }) => {
62+
await ui.projects.openFirstWorkspace();
63+
await ui.chat.setMode("Exec");
64+
65+
await ui.chat.captureStreamTimeline(async () => {
66+
await ui.chat.sendMessage(ERROR_PROMPTS.TRIGGER_API_ERROR);
67+
});
68+
69+
await ui.chat.setMode("Plan");
70+
const timeline = await ui.chat.captureStreamTimeline(async () => {
71+
await ui.chat.sendMessage(LIST_PROGRAMMING_LANGUAGES);
72+
});
73+
74+
expect(timeline.events.some((e) => e.type === "stream-end")).toBe(true);
75+
await ui.chat.expectTranscriptContains("Python");
76+
});
77+
});

‎tests/e2e/scenarios/windowLifecycle.spec.ts‎

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import { electronTest as test, electronExpect as expect } from "../electronTest";
2+
import { LIST_PROGRAMMING_LANGUAGES } from "@/node/services/mock/scenarios/basicChat";
3+
4+
test.skip(
5+
({ browserName }) => browserName !== "chromium",
6+
"Electron scenario runs on chromium only"
7+
);
8+
9+
test.describe("window lifecycle", () => {
10+
test("window opens with expected structure", async ({ page }) => {
11+
await expect(page.getByRole("navigation", { name: "Projects" })).toBeVisible();
12+
await expect(page.locator("main, #root, .app-container").first()).toBeVisible();
13+
await expect(page.getByRole("dialog", { name: /error/i })).not.toBeVisible();
14+
});
15+
16+
test("workspace content loads correctly", async ({ ui, page }) => {
17+
await ui.projects.openFirstWorkspace();
18+
await expect(page.getByRole("log", { name: "Conversation transcript" })).toBeVisible();
19+
await expect(page.getByRole("textbox", { name: /message/i })).toBeVisible();
20+
});
21+
22+
test("survives rapid settings navigation", async ({ ui, page }) => {
23+
await ui.projects.openFirstWorkspace();
24+
25+
// Stress test settings modal with rapid open/close/navigate
26+
for (let i = 0; i < 3; i++) {
27+
await ui.settings.open();
28+
await ui.settings.selectSection("Providers");
29+
await ui.settings.selectSection("Models");
30+
await ui.settings.close();
31+
}
32+
33+
// Verify app remains functional
34+
await expect(page.getByRole("navigation", { name: "Projects" })).toBeVisible();
35+
const chatInput = page.getByRole("textbox", { name: /message/i });
36+
await expect(chatInput).toBeVisible();
37+
await chatInput.click();
38+
await expect(chatInput).toBeFocused();
39+
});
40+
41+
// Exercises IPC handler stability under heavy use (regression: #851 duplicate handler registration)
42+
test("IPC stable after heavy operations", async ({ ui, page }) => {
43+
await ui.projects.openFirstWorkspace();
44+
45+
// Many IPC calls: stream + mode switches + settings navigation
46+
const timeline = await ui.chat.captureStreamTimeline(async () => {
47+
await ui.chat.sendMessage(LIST_PROGRAMMING_LANGUAGES);
48+
});
49+
expect(timeline.events.some((e) => e.type === "stream-end")).toBe(true);
50+
51+
await ui.chat.setMode("Exec");
52+
await ui.chat.setMode("Plan");
53+
await ui.settings.open();
54+
await ui.settings.selectSection("Providers");
55+
await ui.settings.close();
56+
57+
// Verify app remains functional after all IPC calls
58+
await expect(page.getByRole("navigation", { name: "Projects" })).toBeVisible();
59+
await ui.chat.expectTranscriptContains("Python");
60+
});
61+
});

‎tests/e2e/utils/ui.ts‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -345,7 +345,10 @@ export function createWorkspaceUI(page: Page, context: DemoProjectConfig): Works
345345
if (!capture) {
346346
return false;
347347
}
348-
return capture.events.some((event) => event.type === "stream-end");
348+
// Wait for either stream-end or stream-error to complete the capture
349+
return capture.events.some(
350+
(event) => event.type === "stream-end" || event.type === "stream-error"
351+
);
349352
},
350353
workspaceId,
351354
{ timeout: timeoutMs }

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