tests: add tests for experiments related flags

packages/webpack-cli/lib/utils/cli-flags.js

@@ -285,4 +285,5 @@ module.exports = {
 			group: BASIC_GROUP
 		} */
     ],
+    flagsFromCore: [...flagsFromCore],
 };

test/core-flags/experiments-flag.test.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const { run, hyphenToUpperCase } = require('../utils/test-utils');
+const { flagsFromCore } = require('../../packages/webpack-cli/lib/utils/cli-flags');
+
+const experimentsFlags = flagsFromCore.filter((flag) => flag.name.includes('experiments-'));
+
+describe('experiments option related flag', () => {
+    experimentsFlags.forEach((flag) => {
+        // extract property name from flag name
+        const property = flag.name.split('experiments-')[1];
+        const propName = hyphenToUpperCase(property);
+
+        it(`should config ${flag.name} correctly`, () => {
+            const { stderr, stdout } = run(__dirname, [`--${flag.name}`]);
+            expect(stderr).toBeFalsy();
+            expect(stdout).toContain(`${propName}: true`);
+        });
+    });
+});

test/utils/test-utils.js

@@ -292,6 +292,15 @@ const runServe = (args, testPath) => {
     });
 };
 
+const hyphenToUpperCase = (name) => {
+    if (!name) {
+        return name;
+    }
+    return name.replace(/-([a-z])/g, function (g) {
+        return g[1].toUpperCase();
+    });
+};
+
 module.exports = {
     run,
     runWatch,
@@ -304,4 +313,5 @@ module.exports = {
     copyFileAsync,
     appendDataToMultipleIfFilesExists,
     runInstall,
+    hyphenToUpperCase,
 };