From 31c4cdc4002ae131f8adebbed5d4b529cb3d2a23 Mon Sep 17 00:00:00 2001
From: Tobias Koppers <tobias.koppers@googlemail.com>
Date: Wed, 7 Mar 2018 13:12:25 +0100
Subject: [PATCH] Add ident to loaders passed to child compilation

add test case how css deduplication works
---
 src/loader.js                               |  1 +
 test/cases/composes-async/async-1.css       |  4 +++
 test/cases/composes-async/async-2.css       |  3 ++
 test/cases/composes-async/expected/1.css    |  4 +++
 test/cases/composes-async/expected/3.css    |  4 +++
 test/cases/composes-async/index.js          |  2 ++
 test/cases/composes-async/webpack.config.js | 38 +++++++++++++++++++++
 7 files changed, 56 insertions(+)
 create mode 100644 test/cases/composes-async/async-1.css
 create mode 100644 test/cases/composes-async/async-2.css
 create mode 100644 test/cases/composes-async/expected/1.css
 create mode 100644 test/cases/composes-async/expected/3.css
 create mode 100644 test/cases/composes-async/index.js
 create mode 100644 test/cases/composes-async/webpack.config.js

diff --git a/src/loader.js b/src/loader.js
index a8f3ac2f..44f7940b 100644
--- a/src/loader.js
+++ b/src/loader.js
@@ -51,6 +51,7 @@ export function pitch(request) {
           return ({
             loader: loader.path,
             options: loader.options,
+            ident: loader.ident,
           });
         });
       }
diff --git a/test/cases/composes-async/async-1.css b/test/cases/composes-async/async-1.css
new file mode 100644
index 00000000..0cd611ac
--- /dev/null
+++ b/test/cases/composes-async/async-1.css
@@ -0,0 +1,4 @@
+:local .base {
+  composes: composed from './async-2.css';
+  background: blue;
+}
diff --git a/test/cases/composes-async/async-2.css b/test/cases/composes-async/async-2.css
new file mode 100644
index 00000000..4cc245e5
--- /dev/null
+++ b/test/cases/composes-async/async-2.css
@@ -0,0 +1,3 @@
+:local .composed {
+  background: green;
+}
diff --git a/test/cases/composes-async/expected/1.css b/test/cases/composes-async/expected/1.css
new file mode 100644
index 00000000..2fa9e2cb
--- /dev/null
+++ b/test/cases/composes-async/expected/1.css
@@ -0,0 +1,4 @@
+.base {
+  background: blue;
+}
+
diff --git a/test/cases/composes-async/expected/3.css b/test/cases/composes-async/expected/3.css
new file mode 100644
index 00000000..23f2a9f7
--- /dev/null
+++ b/test/cases/composes-async/expected/3.css
@@ -0,0 +1,4 @@
+.composed {
+  background: green;
+}
+
diff --git a/test/cases/composes-async/index.js b/test/cases/composes-async/index.js
new file mode 100644
index 00000000..b9f79b90
--- /dev/null
+++ b/test/cases/composes-async/index.js
@@ -0,0 +1,2 @@
+import('./async-1.css');
+import('./async-2.css');
diff --git a/test/cases/composes-async/webpack.config.js b/test/cases/composes-async/webpack.config.js
new file mode 100644
index 00000000..ef38e7f6
--- /dev/null
+++ b/test/cases/composes-async/webpack.config.js
@@ -0,0 +1,38 @@
+const Self = require('../../../');
+
+module.exports = {
+  entry: './index.js',
+  module: {
+    rules: [
+      {
+        test: /\.css$/,
+        use: [
+          Self.loader,
+          {
+            loader: 'css-loader',
+            options: {
+              localIdentName: '[local]'
+            }
+          }
+        ],
+      },
+    ],
+  },
+  optimization: {
+    splitChunks: {
+      cacheGroups: {
+        cssDedupe: {
+          test: /\.css$/,
+          chunks: 'all',
+          minChunks: 2,
+          enforce: true
+        }
+      }
+    }
+  },
+  plugins: [
+    new Self({
+      filename: '[name].css',
+    }),
+  ],
+};