Chore: add test case for escaped quote url in css

packages/core/integration-tests/test/css.js

@@ -397,6 +397,27 @@ describe('css', () => {
         );
       });
 
+      it('should handle the dependency imported with url() includes escaped quote', async () => {
+        let b = await bundle(
+          path.join(__dirname, '/integration/css-url-escaped-quote/index.css'),
+        );
+        assertBundles(b, [
+          {
+            name: 'index.css',
+            assets: ['index.css'],
+          },
+          {
+            type: 'png',
+            assets: ['f"oo.png'],
+          },
+        ]);
+        let css = await outputFS.readFile(
+          path.join(distDir, 'index.css'),
+          'utf8',
+        );
+        assert(css.includes('url("f\\"oo'));
+      });
+
       it('should remap locations in diagnostics using the input source map', async () => {
         let fixture = path.join(
           __dirname,

packages/core/integration-tests/test/integration/css-url-escaped-quote/index.css

@@ -0,0 +1,3 @@
+.escaped-quote {
+  background: url(./f\"oo.png);
+}