test: cache (#529)

webpack-contrib · Sep 18, 2020 · 58a574b · 58a574b
1 parent fd03615
commit 58a574b
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diff --git a/test/CopyPlugin.test.js b/test/CopyPlugin.test.js
@@ -6,7 +6,7 @@ import CopyPlugin from '../src';
 
 import { run, runEmit, runChange } from './helpers/run';
 
-import { readAssets } from './helpers';
+import { readAssets, getCompiler, compile } from './helpers';
 
 const FIXTURES_DIR = path.join(__dirname, 'fixtures');
 
@@ -633,6 +633,54 @@ describe('CopyPlugin', () => {
         .then(done)
         .catch(done);
     });
+
+    it('should work and do not emit unchanged assets', async () => {
+      const compiler = getCompiler();
+
+      new CopyPlugin({
+        patterns: [
+          {
+            from: path.resolve(__dirname, './fixtures/directory'),
+          },
+        ],
+      }).apply(compiler);
+
+      const { stats } = await compile(compiler);
+
+      if (webpack.version[0] === '4') {
+        expect(
+          Object.keys(stats.compilation.assets).filter(
+            (assetName) => stats.compilation.assets[assetName].emitted
+          ).length
+        ).toBe(5);
+      } else {
+        expect(stats.compilation.emittedAssets.size).toBe(5);
+      }
+
+      expect(readAssets(compiler, stats)).toMatchSnapshot('assets');
+      expect(stats.compilation.errors).toMatchSnapshot('errors');
+      expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+
+      await new Promise(async (resolve) => {
+        const { stats: newStats } = await compile(compiler);
+
+        if (webpack.version[0] === '4') {
+          expect(
+            Object.keys(newStats.compilation.assets).filter(
+              (assetName) => newStats.compilation.assets[assetName].emitted
+            ).length
+          ).toBe(4);
+        } else {
+          expect(newStats.compilation.emittedAssets.size).toBe(4);
+        }
+
+        expect(readAssets(compiler, newStats)).toMatchSnapshot('assets');
+        expect(newStats.compilation.errors).toMatchSnapshot('errors');
+        expect(newStats.compilation.warnings).toMatchSnapshot('warnings');
+
+        resolve();
+      });
+    });
   });
 
   describe('logging', () => {

diff --git a/test/__snapshots__/CopyPlugin.test.js.snap b/test/__snapshots__/CopyPlugin.test.js.snap
@@ -76,3 +76,31 @@ Object {
   ],
 }
 `;
+
+exports[`CopyPlugin watch mode should work and do not emit unchanged assets: assets 1`] = `
+Object {
+  ".dottedfile": "dottedfile contents
+",
+  "directoryfile.txt": "new",
+  "nested/deep-nested/deepnested.txt": "",
+  "nested/nestedfile.txt": "",
+}
+`;
+
+exports[`CopyPlugin watch mode should work and do not emit unchanged assets: assets 2`] = `
+Object {
+  ".dottedfile": "dottedfile contents
+",
+  "directoryfile.txt": "new",
+  "nested/deep-nested/deepnested.txt": "",
+  "nested/nestedfile.txt": "",
+}
+`;
+
+exports[`CopyPlugin watch mode should work and do not emit unchanged assets: errors 1`] = `Array []`;
+
+exports[`CopyPlugin watch mode should work and do not emit unchanged assets: errors 2`] = `Array []`;
+
+exports[`CopyPlugin watch mode should work and do not emit unchanged assets: warnings 1`] = `Array []`;
+
+exports[`CopyPlugin watch mode should work and do not emit unchanged assets: warnings 2`] = `Array []`;