test(webpack-plugin): Test report output

packages/webpack-plugin/test/package/webpack-plugin-webpack-4.test.js

@@ -1,26 +1,23 @@
+const path = require('path');
 const webpack4 = require('webpack4'); // eslint-disable-line
 const MemoryFS = require('memory-fs');
-const { advanceTo } = require('jest-date-mock');
-
-jest.mock('webpack', () => require('./node_modules/webpack4')); // eslint-disable-line
 
 const config = require('./app/webpack.config');
 
-advanceTo(new Date(2020, 10, 30));
-
-jest.setTimeout(10 * 1000);
-
 describe('webpack plugin package', () => {
   test('webpack4', (done) => {
+    const fs = new MemoryFS();
+
     expect.assertions(3);
 
     const compiler = webpack4(config);
-    compiler.outputFileSystem = new MemoryFS();
+    compiler.outputFileSystem = fs;
 
     compiler.run((error, stats) => {
       expect(error).toEqual(null);
       expect(stats.hasErrors()).toBe(false);
-      expect(stats.toJson({ source: false, assets: true }).assets).toMatchSnapshot();
+      const report = fs.readFileSync(path.join(__dirname, './dist/bundle-stats.html'), 'utf-8');
+      expect(report).toBeTruthy();
       done();
     });
   });

packages/webpack-plugin/test/package/webpack-plugin-webpack-5.test.js

@@ -1,31 +1,22 @@
+const path = require('path');
 const webpack5 = require('webpack');
 const MemoryFS = require('memory-fs');
-const { advanceTo } = require('jest-date-mock');
-const { set } = require('lodash');
 
 const config = require('./app/webpack.config');
 
-advanceTo(new Date(2020, 10, 30));
-
-jest.setTimeout(10 * 1000);
-
 describe('webpack plugin package', () => {
   test('webpack5', (done) => {
+    const fs = new MemoryFS();
     expect.assertions(3);
 
     const compiler = webpack5(config);
-    compiler.outputFileSystem = new MemoryFS();
+    compiler.outputFileSystem = fs;
 
     compiler.run((error, stats) => {
       expect(error).toEqual(null);
       expect(stats.hasErrors()).toBe(false);
-
-      // Set bundle-stats.html size to 0 to ignore size changes
-      const { assets } = stats.toJson({ source: false, assets: true });
-      set(assets, '[0].size', 0);
-      set(assets, '[0].info.size', 0);
-
-      expect(assets).toMatchSnapshot();
+      const report = fs.readFileSync(path.join(__dirname, './dist/bundle-stats.html'), 'utf-8');
+      expect(report).toBeTruthy();
       done();
     });
   });