test: fix

Author: alexander-akait

src/index.js

@@ -163,7 +163,7 @@ class CssMinimizerPlugin {
       minify = /** @type {MinimizerImplementation<InferDefaultType<T>>} */
       (cssnanoMinify),
       minimizerOptions = /** @type {MinimizerOptions<InferDefaultType<T>>} */
-      ({ preset: "default" }),
+      ({}),
       test = /\.css(\?.*)?$/i,
       warningsFilter = () => true,
       parallel = true,
@@ -499,14 +499,14 @@ class CssMinimizerPlugin {
           input = sourceFromInputSource;
 
           if (map) {
-            inputSourceMap = /** @type {RawSourceMap} */ (map);
-
             if (!CssMinimizerPlugin.isSourceMap(map)) {
               compilation.warnings.push(
                 /** @type {WebpackError} */ (
                   new Error(`${name} contains invalid source map`)
                 )
               );
+            } else {
+              inputSourceMap = /** @type {RawSourceMap} */ (map);
             }
           }
 

src/utils.js

@@ -75,7 +75,11 @@ function throttleAll(limit, tasks) {
  * @param {CustomOptions} minimizerOptions
  * @return {Promise<MinimizedResult>}
  */
-async function cssnanoMinify(input, sourceMap, minimizerOptions) {
+async function cssnanoMinify(
+  input,
+  sourceMap,
+  minimizerOptions = { preset: "default" }
+) {
   /**
    * @template T
    * @param {string} module

test/__snapshots__/minify-option.test.js.snap

@@ -272,9 +272,9 @@ exports[`"minify" option should work with "CssMinimizerPlugin.esbuildMinify" min
 exports[`"minify" option should work with "CssMinimizerPlugin.esbuildMinify" minifier and emit warnings: warning 1`] = `
 Array [
   "Warning: foo.css from Css Minimizer plugin
-Expected identifier but found whitespace",
+Expected identifier but found whitespace webpack://./wrong-calc.css:1:0",
   "Warning: foo.css from Css Minimizer plugin
-Unexpected \\"calc(\\"",
+Unexpected \\"calc(\\" webpack://./wrong-calc.css:1:0",
 ]
 `;