added config test case for optimization.minimizer

test/configCases/optimization/minimizer/index.js

@@ -0,0 +1 @@
+it("should compile", () => {})

test/configCases/optimization/minimizer/webpack.config.js

@@ -0,0 +1,18 @@
+const Compiler = require('../../../../lib/Compiler');
+
+module.exports = {
+	optimization: {
+		minimize: true,
+		minimizer: [
+			{
+				apply(compiler) {
+					expect(compiler).toBeInstanceOf(Compiler);
+				},
+			},
+			function(compiler) {
+				expect(compiler).toBe(this);
+				expect(compiler).toBeInstanceOf(Compiler);
+			}
+		],
+	},
+};