test: ignore plugin

.gitignore

@@ -8,6 +8,7 @@ npm-debug.log*
 /local
 /reports
 /node_modules
+/test/outputs
 /test/fixtures/import/import-absolute.css
 /test/fixtures/url/url-absolute.css
 /test/fixtures/modules/composes/composes-absolute.css

test/fixtures/url/ignore-plugin.css

@@ -0,0 +1,70 @@
+/*
+  Unknown
+ */
+div {
+    background: url("/assets/unknown.png");
+}
+
+div {
+    background: url("./assets/unknown.png");
+}
+
+div {
+    background: url("assets/unknown.png");
+}
+
+div {
+    background: url("/unknwon.png");
+}
+
+div {
+    background: url("./unknwon.png");
+}
+
+div {
+    background: url("unknwon.png");
+}
+
+/*
+  Known
+ */
+
+div {
+    background: url("/nested/img.png");
+}
+
+div {
+    background: url("./nested/img.png");
+}
+
+div {
+    background: url("./nested/img.png");
+}
+
+div {
+    background: url("/img.png");
+}
+
+div {
+    background: url("./img.png");
+}
+
+div {
+    background: url("img.png");
+}
+
+/*
+  Directory
+ */
+
+div {
+    background: url("/directory/unknown.png");
+}
+
+div {
+    background: url("./directory/unknown.png");
+}
+
+div {
+    background: url("directory/unknown.png");
+}

test/fixtures/url/ignore-plugin.js

@@ -0,0 +1,5 @@
+import css from './ignore-plugin.css';
+
+__export__ = css;
+
+export default css;

test/url-option.test.js

@@ -1,6 +1,8 @@
 import fs from "fs";
 import path from "path";
 
+import webpack from "webpack";
+
 import MiniCssExtractPlugin from "mini-css-extract-plugin";
 
 import {
@@ -378,4 +380,26 @@ describe('"url" option', () => {
     expect(getWarnings(stats)).toMatchSnapshot("warnings");
     expect(getErrors(stats)).toMatchSnapshot("errors");
   });
+
+  // TODO bug on webpack side
+  it.skip("should work with the 'IgnorePlugin' plugin", async () => {
+    const compiler = getCompiler("./url/ignore-plugin.js");
+
+    new webpack.IgnorePlugin({ resourceRegExp: /directory\// }).apply(compiler);
+    new webpack.IgnorePlugin({ resourceRegExp: /unknwon\.png/ }).apply(
+      compiler
+    );
+    new webpack.IgnorePlugin({ resourceRegExp: /img\.png/ }).apply(compiler);
+
+    const stats = await compile(compiler);
+
+    expect(getModuleSource("./url/ignore-plugin.css", stats)).toMatchSnapshot(
+      "module"
+    );
+    expect(getExecutedCode("main.bundle.js", compiler, stats)).toMatchSnapshot(
+      "result"
+    );
+    expect(getWarnings(stats)).toMatchSnapshot("warnings");
+    expect(getErrors(stats)).toMatchSnapshot("errors");
+  });
 });