feat: enable cache by default for webpack@4 (#164)

BREAKING CHANGE: the `cache` is `true` by default for webpack@4

Author: evilebottnawi

src/index.js

@@ -26,7 +26,7 @@ class CompressionPlugin {
       test,
       include,
       exclude,
-      cache = false,
+      cache = true,
       algorithm = 'gzip',
       compressionOptions = {},
       filename = '[path].gz[query]',

test/CompressionPlugin.test.js

@@ -6,9 +6,14 @@ import {
   getCompiler,
   getErrors,
   getWarnings,
+  removeCache,
 } from './helpers/index';
 
 describe('CompressionPlugin', () => {
+  beforeEach(() => {
+    return removeCache();
+  });
+
   it('should work', async () => {
     const compiler = getCompiler(
       './entry.js',

test/algorithm.test.js

@@ -6,13 +6,16 @@ import {
   getCompiler,
   getErrors,
   getWarnings,
+  removeCache,
 } from './helpers/index';
 
 describe('"algorithm" option', () => {
   let compiler;
 
   beforeEach(() => {
     compiler = getCompiler('./entry.js');
+
+    return removeCache();
   });
 
   it('matches snapshot for `unknown` value ({String})', () => {

test/cache-option.test.js

@@ -6,6 +6,7 @@ import findCacheDir from 'find-cache-dir';
 import del from 'del';
 
 import CompressionPlugin from '../src/index';
+import Webpack4Cache from '../src/Webpack4Cache';
 
 import {
   compile,
@@ -17,13 +18,15 @@ import {
 
 const cacheDir = findCacheDir({ name: 'compression-webpack-plugin' });
 const otherCacheDir = findCacheDir({ name: 'other-cache-directory' });
+const uniqueDirectory = findCacheDir({ name: 'unique-cache-directory' });
 
 if (getCompiler.isWebpack4()) {
   describe('"cache" option', () => {
     beforeEach(() => {
       return Promise.all([
         cacache.rm.all(cacheDir),
         cacache.rm.all(otherCacheDir),
+        cacache.rm.all(uniqueDirectory),
       ]);
     });
 
@@ -65,6 +68,12 @@ if (getCompiler.isWebpack4()) {
       cacache.get = jest.fn(cacache.get);
       cacache.put = jest.fn(cacache.put);
 
+      const getCacheDirectorySpy = jest
+        .spyOn(Webpack4Cache, 'getCacheDirectory')
+        .mockImplementation(() => {
+          return uniqueDirectory;
+        });
+
       const stats = await compile(beforeCacheCompiler);
 
       expect(getAssetsNameAndSize(stats)).toMatchSnapshot('assets');
@@ -78,7 +87,7 @@ if (getCompiler.isWebpack4()) {
       // Put files in cache
       expect(cacache.put.mock.calls.length).toBe(countAssets / 2);
 
-      const cacheEntriesList = await cacache.ls(cacheDir);
+      const cacheEntriesList = await cacache.ls(uniqueDirectory);
 
       const cacheKeys = Object.keys(cacheEntriesList);
 
@@ -117,6 +126,8 @@ if (getCompiler.isWebpack4()) {
       // Now we have cached files so we get their and don't put
       expect(cacache.get.mock.calls.length).toBe(newCountAssets / 2);
       expect(cacache.put.mock.calls.length).toBe(0);
+
+      getCacheDirectorySpy.mockRestore();
     });
 
     it('matches snapshot for `other-cache-directory` value ({String})', async () => {

test/compressionOptions-option.test.js

@@ -6,13 +6,16 @@ import {
   getCompiler,
   getErrors,
   getWarnings,
+  removeCache,
 } from './helpers/index';
 
 describe('"compressionOptions" option', () => {
   let compiler;
 
   beforeEach(() => {
     compiler = getCompiler('./entry.js');
+
+    return removeCache();
   });
 
   it('matches snapshot without values', async () => {

test/deleteOriginalAssets.test.js

@@ -6,13 +6,16 @@ import {
   getCompiler,
   getErrors,
   getWarnings,
+  removeCache,
 } from './helpers/index';
 
 describe('"deleteOriginalAssets" option', () => {
   let compiler;
 
   beforeEach(() => {
     compiler = getCompiler('./entry.js');
+
+    return removeCache();
   });
 
   it('matches snapshot for `true` value ({Boolean})', async () => {

test/exclude-option.test.js

@@ -6,6 +6,7 @@ import {
   getCompiler,
   getErrors,
   getWarnings,
+  removeCache,
 } from './helpers/index';
 
 describe('"exclude" option', () => {
@@ -23,6 +24,8 @@ describe('"exclude" option', () => {
         },
       }
     );
+
+    return removeCache();
   });
 
   it('matches snapshot for a single `exclude` value ({RegExp})', async () => {

test/filename-option.test.js

@@ -6,6 +6,7 @@ import {
   getCompiler,
   getErrors,
   getWarnings,
+  removeCache,
 } from './helpers/index';
 
 describe('"filename" option', () => {
@@ -23,6 +24,8 @@ describe('"filename" option', () => {
         },
       }
     );
+
+    return removeCache();
   });
 
   it('matches snapshot for `[path].super-compressed.gz[query]` value ({String})', async () => {

test/helpers/getCacheDirectory.js

@@ -0,0 +1,9 @@
+import os from 'os';
+
+import findCacheDir from 'find-cache-dir';
+
+function getCacheDirectory() {
+  return findCacheDir({ name: 'compression-webpack-plugin' }) || os.tmpdir();
+}
+
+export default getCacheDirectory;

test/helpers/index.js

@@ -7,6 +7,7 @@ import getWarnings from './getWarnings';
 import normalizeErrors from './normalizeErrors';
 import readAsset from './readAsset';
 import readsAssets from './readAssets';
+import removeCache from './removeCache';
 
 export {
   compile,
@@ -18,4 +19,5 @@ export {
   normalizeErrors,
   readAsset,
   readsAssets,
+  removeCache,
 };