test: remove copy plugin build folder (#8251)

Author: LingyuCoder

.gitignore

@@ -223,6 +223,8 @@ tests/plugin-test/css-extract/js
 
 tests/plugin-test/html-plugin/js
 
+tests/plugin-test/copy-plugin/build
+
 /webpack-examples/**/dist
 
 smoke-example

tests/plugin-test/copy-plugin/CopyPlugin.test.js

@@ -6,10 +6,14 @@ const rspack = require("@rspack/core");
 const { run, runEmit, runChange } = require("./helpers/run");
 
 const { readAssets, getCompiler, compile } = require("./helpers");
+const rimraf = require("rimraf");
 
 const FIXTURES_DIR = path.join(__dirname, "fixtures");
 
 describe("CopyPlugin", () => {
+	beforeEach(() => {
+		rimraf.sync(path.join(__dirname, "build"));
+	});
 	describe("basic", () => {
 		it("should copy a file", done => {
 			runEmit({