aspnetcore/test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/Rendering/HtmlHelperRadioButtonExtensionsTest.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Testing;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.Core
{
    /// <summary>
    /// Test the RadioButton extensions in <see cref="HtmlHelperInputExtensions" /> class.
    /// </summary>
    public class HtmlHelperRadioButtonExtensionsTest
    {
        [Fact]
        public void RadioButton_UsesSpecifiedExpression()
        {
            // Arrange
            var helper = DefaultTemplatesUtilities.GetHtmlHelper();

            // Act
            var radioButtonResult = helper.RadioButton("Property1", value: "myvalue");

            // Assert
            Assert.Equal(
                "<input id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonResult));
        }

        [Fact]
        public void RadioButtonFor_UsesSpecifiedExpression()
        {
            // Arrange
            var helper = DefaultTemplatesUtilities.GetHtmlHelper();

            // Act
            var radioButtonForResult = helper.RadioButtonFor(m => m.Property1, value: "myvalue");

            // Assert
            Assert.Equal(
                "<input id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonForResult));
        }

        [Theory]
        [InlineData("MyValue")]
        [InlineData("myvalue")]
        public void RadioButton_CheckedWhenValueMatchesSpecifiedExpression(string value)
        {
            // Arrange
            var metadataProvider = new EmptyModelMetadataProvider();
            var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
            helper.ViewContext.ClientValidationEnabled = false;
            helper.ViewData.Model = new TestModel { Property1 = value };

            // Act
            var radioButtonResult = helper.RadioButton("Property1", value: "myvalue");

            // Assert
            Assert.Equal(
                "<input checked=\"HtmlEncode[[checked]]\" id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonResult));
        }

        [Theory]
        [InlineData("MyValue")]
        [InlineData("myvalue")]
        public void RadioButtonFor_CheckedWhenValueMatchesSpecifiedExpression(string value)
        {
            // Arrange
            var metadataProvider = new EmptyModelMetadataProvider();
            var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
            helper.ViewContext.ClientValidationEnabled = false;
            helper.ViewData.Model = new TestModel { Property1 = value };

            // Act
            var radioButtonForResult = helper.RadioButtonFor(m => m.Property1, value: "myvalue");

            // Assert
            Assert.Equal(
                "<input checked=\"HtmlEncode[[checked]]\" id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonForResult));
        }

        [Fact]
        public void RadioButtonHelpers_UsesSpecifiedIsChecked()
        {
            // Arrange
            var helper = DefaultTemplatesUtilities.GetHtmlHelper();

            // Act
            var radioButtonResult = helper.RadioButton("Property1", value: "myvalue", isChecked: true);

            // Assert
            Assert.Equal(
                "<input checked=\"HtmlEncode[[checked]]\" id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonResult));
        }

        [Fact]
        public void RadioButtonHelpers_UsesSpecifiedIsCheckedRegardlessOfValue()
        {
            // Arrange
            var metadataProvider = new EmptyModelMetadataProvider();
            var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
            helper.ViewContext.ClientValidationEnabled = false;
            helper.ViewData.Model = new TestModel { Property2 = true };

            // Act
            var radioButtonResult = helper.RadioButton("Property2", value: "myvalue", isChecked: false);

            // Assert
            Assert.Equal(
                "<input id=\"HtmlEncode[[Property2]]\" name=\"HtmlEncode[[Property2]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonResult));
        }

        [Fact]
        public void RadioButton_UsesSpecifiedHtmlAttributes()
        {
            // Arrange
            var helper = DefaultTemplatesUtilities.GetHtmlHelper();
            var htmlAttributes = new
            {
                attr = "value",
                name = "-expression-", // overridden
            };

            // Act
            var radioButtonResult = helper.RadioButton("Property1", "myvalue", htmlAttributes);

            // Assert
            Assert.Equal(
                "<input attr=\"HtmlEncode[[value]]\" id=\"HtmlEncode[[Property1]]\" " +
                "name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonResult));
        }

        [Fact]
        public void RadioButtonFor_UsesSpecifiedHtmlAttributes()
        {
            // Arrange
            var helper = DefaultTemplatesUtilities.GetHtmlHelper();
            var htmlAttributes = new
            {
                attr = "value",
                name = "-expression-", // overridden
            };

            // Act
            var radioButtonForResult = helper.RadioButtonFor(m => m.Property1, "myvalue", htmlAttributes);

            // Assert
            Assert.Equal(
                "<input attr=\"HtmlEncode[[value]]\" id=\"HtmlEncode[[Property1]]\" " +
                "name=\"HtmlEncode[[Property1]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonForResult));
        }

        [Fact]
        public void RadioButtonFor_Throws_IfFullNameEmpty()
        {
            // Arrange
            var expectedMessage = "The name of an HTML field cannot be null or empty. Instead use methods " +
                "Microsoft.AspNetCore.Mvc.Rendering.IHtmlHelper.Editor or Microsoft.AspNetCore.Mvc.Rendering." +
                "IHtmlHelper`1.EditorFor with a non-empty htmlFieldName argument value.";

            var helper = DefaultTemplatesUtilities.GetHtmlHelper("anotherValue");
            var htmlAttributes = new
            {
                attr = "value",
            };

            // Act & Assert
            ExceptionAssert.ThrowsArgument(
                () => helper.RadioButtonFor(m => m, "myvalue", htmlAttributes),
                paramName: "expression",
                exceptionMessage: expectedMessage);
        }

        [Fact]
        public void RadioButtonFor_DoesNotThrow_IfFullNameEmpty_WithNameAttribute()
        {
            // Arrange
            var helper = DefaultTemplatesUtilities.GetHtmlHelper("anotherValue");
            var htmlAttributes = new
            {
                attr = "value",
                name = "-expression-",
            };

            // Act
            var radioButtonForResult = helper.RadioButtonFor(m => m, "myvalue", htmlAttributes);

            // Assert
            Assert.Equal(
                "<input attr=\"HtmlEncode[[value]]\" " +
                "name=\"HtmlEncode[[-expression-]]\" type=\"HtmlEncode[[radio]]\" value=\"HtmlEncode[[myvalue]]\" />",
                HtmlContentUtilities.HtmlContentToString(radioButtonForResult));
        }

        private class TestModel
        {
            public string Property1 { get; set; }

            public bool Property2 { get; set; }
        }
    }
}