test: add e2e tests for setupExitSignals option (#4130)

Co-authored-by: Alexander Akait <4567934+alexander-akait@users.noreply.github.com>

test/e2e/__snapshots__/setup-exit-signals.test.js.snap.webpack4

@@ -0,0 +1,27 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGINT: console messages 1`] = `
+Array [
+  "[HMR] Waiting for update signal from WDS...",
+  "Hey.",
+  "[webpack-dev-server] Hot Module Replacement enabled.",
+  "[webpack-dev-server] Live Reloading enabled.",
+]
+`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGINT: page errors 1`] = `Array []`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGINT: response status 1`] = `200`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGTERM: console messages 1`] = `
+Array [
+  "[HMR] Waiting for update signal from WDS...",
+  "Hey.",
+  "[webpack-dev-server] Hot Module Replacement enabled.",
+  "[webpack-dev-server] Live Reloading enabled.",
+]
+`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGTERM: page errors 1`] = `Array []`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGTERM: response status 1`] = `200`;

test/e2e/__snapshots__/setup-exit-signals.test.js.snap.webpack5

@@ -0,0 +1,27 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGINT: console messages 1`] = `
+Array [
+  "[HMR] Waiting for update signal from WDS...",
+  "Hey.",
+  "[webpack-dev-server] Hot Module Replacement enabled.",
+  "[webpack-dev-server] Live Reloading enabled.",
+]
+`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGINT: page errors 1`] = `Array []`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGINT: response status 1`] = `200`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGTERM: console messages 1`] = `
+Array [
+  "[HMR] Waiting for update signal from WDS...",
+  "Hey.",
+  "[webpack-dev-server] Hot Module Replacement enabled.",
+  "[webpack-dev-server] Live Reloading enabled.",
+]
+`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGTERM: page errors 1`] = `Array []`;
+
+exports[`setupExitSignals option should handle 'SIGINT' and 'SIGTERM' signals should close and exit on SIGTERM: response status 1`] = `200`;

test/e2e/setup-exit-signals.test.js

@@ -0,0 +1,110 @@
+"use strict";
+
+const webpack = require("webpack");
+const Server = require("../../lib/Server");
+const config = require("../fixtures/simple-config/webpack.config");
+const runBrowser = require("../helpers/run-browser");
+const port = require("../ports-map")["setup-exit-signals-option"];
+
+describe("setupExitSignals option", () => {
+  describe("should handle 'SIGINT' and 'SIGTERM' signals", () => {
+    let compiler;
+    let server;
+    let page;
+    let browser;
+    let pageErrors;
+    let consoleMessages;
+    let doExit;
+    let exitSpy;
+    let stopCallbackSpy;
+    let stdinResumeSpy;
+    let closeCallbackSpy;
+
+    const signals = ["SIGINT", "SIGTERM"];
+
+    beforeEach(async () => {
+      compiler = webpack(config);
+
+      server = new Server(
+        {
+          setupExitSignals: true,
+          port,
+        },
+        compiler
+      );
+
+      await server.start();
+
+      ({ page, browser } = await runBrowser());
+
+      pageErrors = [];
+      consoleMessages = [];
+      doExit = false;
+
+      exitSpy = jest.spyOn(process, "exit").mockImplementation(() => {
+        doExit = true;
+      });
+
+      stdinResumeSpy = jest
+        .spyOn(process.stdin, "resume")
+        .mockImplementation(() => {});
+
+      stopCallbackSpy = jest.spyOn(server, "stopCallback");
+
+      if (server.compiler.close) {
+        closeCallbackSpy = jest.spyOn(server.compiler, "close");
+      }
+    });
+
+    afterEach(async () => {
+      exitSpy.mockReset();
+      stdinResumeSpy.mockReset();
+      signals.forEach((signal) => {
+        process.removeAllListeners(signal);
+      });
+      process.stdin.removeAllListeners("end");
+      await browser.close();
+      await server.stop();
+    });
+
+    it.each(signals)("should close and exit on %s", async (signal) => {
+      page
+        .on("console", (message) => {
+          consoleMessages.push(message);
+        })
+        .on("pageerror", (error) => {
+          pageErrors.push(error);
+        });
+
+      const response = await page.goto(`http://127.0.0.1:${port}/main`, {
+        waitUntil: "networkidle0",
+      });
+
+      expect(response.status()).toMatchSnapshot("response status");
+
+      process.emit(signal);
+
+      await new Promise((resolve) => {
+        const interval = setInterval(() => {
+          if (doExit) {
+            expect(stopCallbackSpy.mock.calls.length).toEqual(1);
+
+            if (server.compiler.close) {
+              expect(closeCallbackSpy.mock.calls.length).toEqual(1);
+            }
+
+            clearInterval(interval);
+
+            resolve();
+          }
+        }, 100);
+      });
+
+      expect(consoleMessages.map((message) => message.text())).toMatchSnapshot(
+        "console messages"
+      );
+
+      expect(pageErrors).toMatchSnapshot("page errors");
+    });
+  });
+});