class-validator/test/functional/validation-error.spec.ts at develop · cduff/class-validator · GitHub

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import { IsString, IsUrl, IsOptional, ValidateNested, MinLength } from '../../src/decorator/decorators';
import { Validator } from '../../src/validation/Validator';

const validator = new Validator();

/**
 * TODO: needs to split these test into
 *   - testing basic toString
 *   - testing nested objects
 *   - testing arrays
 *   - testing color codes?
 */
describe('ValidationError', () => {
  it('should correctly log error message without ANSI escape codes', async () => {
    class NestedClass {
      @IsString()
      public name: string;

      @IsUrl()
      public url: string;

      @IsOptional()
      @ValidateNested()
      public insideNested: NestedClass;

      constructor(url: string, name: any, insideNested?: NestedClass) {
        this.url = url;
        this.name = name;
        this.insideNested = insideNested;
      }
    }

    class RootClass {
      @IsString()
      @MinLength(15)
      public title: string;

      @ValidateNested()
      public nestedObj: NestedClass;

      @ValidateNested({ each: true })
      public nestedArr: NestedClass[];

      constructor() {
        this.title = 5 as any;
        this.nestedObj = new NestedClass('invalid-url', 5, new NestedClass('invalid-url', 5));
        this.nestedArr = [new NestedClass('invalid-url', 5), new NestedClass('invalid-url', 5)];
      }
    }

    const validationErrors = await validator.validate(new RootClass());
    expect(validationErrors).toHaveLength(3);
    expect(validationErrors[0].toString()).toEqual(
      'An instance of RootClass has failed the validation:\n' +
        ' - property title has failed the following constraints: minLength, isString \n'
    );
    expect(validationErrors[1].toString()).toEqual(
      'An instance of RootClass has failed the validation:\n' +
        ' - property nestedObj.name has failed the following constraints: isString \n' +
        ' - property nestedObj.url has failed the following constraints: isUrl \n' +
        ' - property nestedObj.insideNested.name has failed the following constraints: isString \n' +
        ' - property nestedObj.insideNested.url has failed the following constraints: isUrl \n'
    );
    expect(validationErrors[2].toString()).toEqual(
      'An instance of RootClass has failed the validation:\n' +
        ' - property nestedArr[0].name has failed the following constraints: isString \n' +
        ' - property nestedArr[0].url has failed the following constraints: isUrl \n' +
        ' - property nestedArr[1].name has failed the following constraints: isString \n' +
        ' - property nestedArr[1].url has failed the following constraints: isUrl \n'
    );
    expect(validationErrors[0].toString(undefined, undefined, undefined, true)).toEqual(
      'An instance of RootClass has failed the validation:\n' +
        ' - property title has failed the following constraints: title must be longer than or equal to 15 characters, title must be a string \n'
    );
    expect(validationErrors[1].toString(undefined, undefined, undefined, true)).toEqual(
      'An instance of RootClass has failed the validation:\n' +
        ' - property nestedObj.name has failed the following constraints: name must be a string \n' +
        ' - property nestedObj.url has failed the following constraints: url must be a URL address \n' +
        ' - property nestedObj.insideNested.name has failed the following constraints: name must be a string \n' +
        ' - property nestedObj.insideNested.url has failed the following constraints: url must be a URL address \n'
    );
    expect(validationErrors[2].toString(undefined, undefined, undefined, true)).toEqual(
      'An instance of RootClass has failed the validation:\n' +
        ' - property nestedArr[0].name has failed the following constraints: name must be a string \n' +
        ' - property nestedArr[0].url has failed the following constraints: url must be a URL address \n' +
        ' - property nestedArr[1].name has failed the following constraints: name must be a string \n' +
        ' - property nestedArr[1].url has failed the following constraints: url must be a URL address \n'
    );
  });
});