class-validator-is-nullable/test/isnullable.spec.ts

@IsNullable validator for class-validator

import "es6-shim";
import "mocha";

import { IsNotEmpty, Validator } from "class-validator";

import { IsNullable } from "../src";
import { expect } from "chai";

const validator = new Validator();

describe("IsNullable", function () {
    it("shouldn't validate a property when field is null", function () {
        class MyClass {
            @IsNullable()
            @IsNotEmpty()
            title: string = null;
        }

        const model = new MyClass();
        return validator.validate(model).then(errors => {
            expect(errors.length).to.equal(0);
        });
    });

    it("should validate a property when field is not null", function () {
        class MyClass {
            @IsNullable()
            @IsNotEmpty()
            title: string = "";
        }

        const model = new MyClass();
        return validator.validate(model).then(errors => {
            expect(errors.length).to.equal(1);
            expect(errors[0].target).to.equal(model);
            expect(errors[0].property).to.equal("title");
            expect(errors[0].constraints).to.eql({ isNotEmpty: "title should not be empty" });
            expect(errors[0].value).to.equal("");
        });
    });
});