Add finish module test case

test/configCases/finish-modules/simple/index.js

@@ -0,0 +1,3 @@
+it("should compile", function(done) {
+	done();
+});

test/configCases/finish-modules/simple/webpack.config.js

@@ -0,0 +1,14 @@
+var testPlugin = function() {
+	this.hooks.compilation.tap("TestPlugin", compilation => {
+		compilation.hooks.finishModules.tapAsync("TestPlugin", function(
+			_modules,
+			callback
+		) {
+			callback();
+		});
+	});
+};
+
+module.exports = {
+	plugins: [testPlugin]
+};