tests: add schema tests

Author: evenstensberg

packages/generate-loader/package-lock.json

@@ -0,0 +1,3 @@
+module.exports={
+entry: "hey"
+};

packages/generate-plugin/package-lock.json

@@ -0,0 +1,17 @@
+"use strict";
+
+constvalidation=require("../../../../bin/utils/validate-options");
+const{ run }=require("../../../testUtils");
+
+test("validation",()=>{
+constmockExit=jest.spyOn(process,"exit").mockImplementation(()=>{});
+validation(null);
+expect(mockExit).toHaveBeenCalledWith(-1);
+mockExit.mockRestore();
+});
+
+test("validation-success",()=>{
+const{ stdout, code }=run(__dirname,["--config","./options.js"]);
+expect(stdout).toContain("Can't resolve 'hey'");
+expect(code).toBe(2);
+});