StringEnumValidatorTests.cs

#region License
// Copyright (c) .NET Foundation and contributors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// The latest version of this file can be found at https://github.com/FluentValidation/FluentValidation
#endregion

namespace FluentValidation.Tests {
	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading.Tasks;
	using Xunit;

	public class StringEnumValidatorTests {
		private readonly TestValidator _caseInsensitiveValidator;

		private readonly TestValidator _caseSensitiveValidator;

		public StringEnumValidatorTests() {
			CultureScope.SetDefaultCulture();

			_caseInsensitiveValidator = new TestValidator {
				v => v.RuleFor(x => x.GenderString).IsEnumName(typeof(EnumGender), false)
			};

			_caseSensitiveValidator = new TestValidator {
				v => v.RuleFor(x => x.GenderString).IsEnumName(typeof(EnumGender), true)
			};
		}

		[Fact]
		public void IsValidTests_CaseInsensitive_CaseCorrect() {
			_caseInsensitiveValidator.Validate(new Person { GenderString = "Female" }).IsValid.ShouldBeTrue();
			_caseInsensitiveValidator.Validate(new Person { GenderString = "Male" }).IsValid.ShouldBeTrue();
		}

		[Fact]
		public void IsValidTests_CaseInsensitive_CaseIncorrect() {
			_caseInsensitiveValidator.Validate(new Person { GenderString = "femAlE" }).IsValid.ShouldBeTrue();
			_caseInsensitiveValidator.Validate(new Person { GenderString = "maLe" }).IsValid.ShouldBeTrue();
		}

		[Fact]
		public void IsValidTests_CaseSensitive_CaseCorrect() {
			_caseSensitiveValidator.Validate(new Person { GenderString = "Female" }).IsValid.ShouldBeTrue();
			_caseSensitiveValidator.Validate(new Person { GenderString = "Male" }).IsValid.ShouldBeTrue();
		}

		[Fact]
		public void IsValidTests_CaseSensitive_CaseIncorrect() {
			_caseSensitiveValidator.Validate(new Person { GenderString = "femAlE" }).IsValid.ShouldBeFalse();
			_caseSensitiveValidator.Validate(new Person { GenderString = "maLe" }).IsValid.ShouldBeFalse();
		}

		[Fact]
		public void When_the_property_is_initialized_with_invalid_string_then_the_validator_should_fail() {
			_caseInsensitiveValidator.Validate(new Person { GenderString = "other" }).IsValid.ShouldBeFalse();
		}

		[Fact]
		public void When_the_property_is_initialized_with_empty_string_then_the_validator_should_fail() {
			_caseInsensitiveValidator.Validate(new Person { GenderString = string.Empty }).IsValid.ShouldBeFalse();
		}

		[Fact]
		public void When_the_property_is_initialized_with_null_then_the_validator_should_be_valid() {
			_caseInsensitiveValidator.Validate(new Person { GenderString = null }).IsValid.ShouldBeTrue();
		}

		[Fact]
		public void When_validation_fails_the_default_error_should_be_set() {
			var result = _caseInsensitiveValidator.Validate(new Person { GenderString = "invalid" });
			result.Errors.Single().ErrorMessage.ShouldEqual("'Gender String' has a range of values which does not include 'invalid'.");
		}

		[Fact]
		public void When_enumType_is_null_it_should_throw() {
			Assert.Throws<ArgumentNullException>(() => new TestValidator { v => v.RuleFor(x => x.GenderString).IsEnumName(null) });
		}

		[Fact]
		public void When_enumType_is_not_an_enum_it_should_throw() {
			var exception = Assert.Throws<ArgumentOutOfRangeException>(() => new TestValidator { v => v.RuleFor(x => x.GenderString).IsEnumName(typeof(Person)) });
			string expectedMessage = "The type 'Person' is not an enum and can't be used with IsEnumName. (Parameter 'enumType')";
			exception.Message.ShouldEqual(expectedMessage);
		}
	}
}