fix: show deprecation warning for both https and http2 (#4069)

Author: snitin315

lib/Server.js

@@ -674,14 +674,21 @@ class Server {
     const isHTTPs = Boolean(options.https);
     const isSPDY = Boolean(options.http2);
 
-    if (isHTTPs || isSPDY) {
+    if (isHTTPs) {
       // TODO: remove in the next major release
       util.deprecate(
         () => {},
-        `'${
-          isHTTPs ? "https" : "http2"
-        }' option is deprecated. Please use the 'server' option.`,
-        `DEP_WEBPACK_DEV_SERVER_${isHTTPs ? "HTTPS" : "HTTP2"}`
+        "'https' option is deprecated. Please use the 'server' option.",
+        "DEP_WEBPACK_DEV_SERVER_HTTPS"
+      )();
+    }
+
+    if (isSPDY) {
+      // TODO: remove in the next major release
+      util.deprecate(
+        () => {},
+        "'http2' option is deprecated. Please use the 'server' option.",
+        "DEP_WEBPACK_DEV_SERVER_HTTP2"
       )();
     }
 

test/e2e/http2.test.js

@@ -21,10 +21,13 @@ describe("http2 option", () => {
     let page;
     let browser;
     let HTTPVersion;
+    let utilSpy;
 
     beforeEach(async () => {
       compiler = webpack(config);
 
+      utilSpy = jest.spyOn(util, "deprecate");
+
       server = new Server(
         {
           static: staticDirectory,
@@ -49,6 +52,7 @@ describe("http2 option", () => {
     });
 
     afterEach(async () => {
+      utilSpy.mockRestore();
       await browser.close();
       await server.stop();
     });
@@ -82,6 +86,15 @@ describe("http2 option", () => {
 
       expect(HTTPVersion).toEqual("h2");
 
+      // should show deprecated warning for both `https` and `http2`
+      expect(utilSpy.mock.calls[0][1]).toBe(
+        "'https' option is deprecated. Please use the 'server' option."
+      );
+
+      expect(utilSpy.mock.calls[1][1]).toBe(
+        "'http2' option is deprecated. Please use the 'server' option."
+      );
+
       http2Req.end();
     });
   });
@@ -118,6 +131,7 @@ describe("http2 option", () => {
     });
 
     afterEach(async () => {
+      utilSpy.mockRestore();
       await browser.close();
       await server.stop();
     });