/*
 * © 2017 Stratio Big Data Inc., Sucursal en España.
 *
 * This software is licensed under the Apache License, Version 2.0.
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the terms of the License for more details.
 *
 * SPDX-License-Identifier: Apache-2.0.
 */
import { SimpleChanges, SimpleChange } from '@angular/core';

import { StMinValidator } from './st-min-validator';
import { FormControl, ValidationErrors } from '@angular/forms';

describe('Directive: StMinValidator', () => {
   let directive: StMinValidator;
   let allowedMin: number = 20;
   let formControl: FormControl = new FormControl(allowedMin);
   let simpleChanges: SimpleChanges = {
      min: new SimpleChange('0', String(allowedMin), true)
   };

   beforeEach(() => {
      directive = new StMinValidator();
      directive.min = String(allowedMin);
      directive.ngOnChanges(simpleChanges);
   });

   describe('should be able to validate if a number is minor than another', () => {

      it('if the allowed minimum number is not defined, it does not return any error', () => {
         directive.min = undefined;
         formControl.patchValue(allowedMin + 1);

         let validationErrors: ValidationErrors = directive.validate(formControl);

         expect(validationErrors).toBeNull();
      });

      it('if number is undefined, it does not return any error', () => {
         formControl.patchValue(undefined);

         let validationErrors: ValidationErrors = directive.validate(formControl);

         expect(validationErrors).toBeNull();
      });

      it('if number is minor than the allowed, it returns an error', () => {
         formControl.patchValue(10);
         let validationErrors: ValidationErrors = directive.validate(formControl);

         expect(validationErrors).not.toBeNull();
         expect(validationErrors.min).toBeDefined();
         expect(validationErrors.min.min).toBe(allowedMin);
         expect(validationErrors.min.actual).toBe(10);

         directive.min = String(10.6);
         directive.ngOnChanges(simpleChanges);

         formControl.patchValue(10);
         validationErrors = directive.validate(formControl);

         expect(validationErrors).not.toBeNull();
         expect(validationErrors.min).toBeDefined();
         expect(validationErrors.min.min).toBe(10.6);
         expect(validationErrors.min.actual).toBe(10);
      });

      it('if number is equal to the allowed, it does not return any error', () => {
         formControl.patchValue(allowedMin);

         let validationErrors: ValidationErrors = directive.validate(formControl);

         expect(validationErrors).toBeNull();
      });

      it('if number is major than the allowed, it does not return any error', () => {
         formControl.patchValue(allowedMin + 1);

         let validationErrors: ValidationErrors = directive.validate(formControl);

         expect(validationErrors).toBeNull();
      });

   });

   it('it should register the onChange function in order to be executed when form control is updated', () => {
      let fakeOnChangeFunction = jasmine.createSpy('onChange');

      directive.registerOnValidatorChange(fakeOnChangeFunction);

      directive.ngOnChanges(simpleChanges);

      expect(fakeOnChangeFunction).toHaveBeenCalled();
   });
});