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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
namespace Microsoft.AspNetCore.Mvc.Core;
public class HtmlHelperDropDownListExtensionsTest
{
private static readonly List<SelectListItem> BasicSelectList = new List<SelectListItem>
{
new SelectListItem("Zero", "0"),
new SelectListItem("One", "1"),
new SelectListItem("Two", "2"),
new SelectListItem("Three", "3"),
};
[Fact]
public void DropDownList_FindsSelectList()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\">" +
"<option value=\"HtmlEncode[[0]]\">HtmlEncode[[Zero]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[1]]\">HtmlEncode[[One]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[2]]\">HtmlEncode[[Two]]</option>" + Environment.NewLine +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[3]]\">HtmlEncode[[Three]]</option>" + Environment.NewLine +
"</select>";
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.ModelState.SetModelValue("Property1", 3, "3");
helper.ViewData["Property1"] = BasicSelectList;
// Act
var dropDownListResult = helper.DropDownList("Property1");
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListResult));
}
[Fact]
public void DropDownList_FindsSelectList_UsesOptionLabel()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\">" +
"<option value=\"\">HtmlEncode[[--select--]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[0]]\">HtmlEncode[[Zero]]</option>" + Environment.NewLine +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[1]]\">HtmlEncode[[One]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[2]]\">HtmlEncode[[Two]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[3]]\">HtmlEncode[[Three]]</option>" + Environment.NewLine +
"</select>";
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.ModelState.SetModelValue("Property1", 1, "1");
helper.ViewData["Property1"] = BasicSelectList;
// Act
var dropDownListResult = helper.DropDownList("Property1", "--select--");
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListResult));
}
[Fact]
public void DropDownList_UsesSpecifiedExpressionAndSelectList()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property2]]\" name=\"HtmlEncode[[Property2]]\">" +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[4]]\">HtmlEncode[[Four]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[5]]\">HtmlEncode[[Five]]</option>" + Environment.NewLine +
"</select>";
var selectList = new List<SelectListItem>
{
new SelectListItem("Four", "4"),
new SelectListItem("Five", "5"),
};
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.Model = new TestModel { Property2 = "4" };
// Act
var dropDownListResult = helper.DropDownList("Property2", selectList);
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListResult));
}
[Fact]
public void DropDownList_UsesSpecifiedExpressionAndSelectListAndHtmlAttributes()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property1]]\" Key=\"HtmlEncode[[Value]]\" name=\"HtmlEncode[[Property1]]\">" +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[4]]\">HtmlEncode[[Four]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[5]]\">HtmlEncode[[Five]]</option>" + Environment.NewLine +
"</select>";
var selectList = new List<SelectListItem>
{
new SelectListItem("Four", "4"),
new SelectListItem("Five", "5"),
};
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.ModelState.SetModelValue("Property1", 4, "4");
helper.ViewData["Property1"] = BasicSelectList;
// Act
var dropDownListResult = helper.DropDownList("Property1", selectList, new { Key = "Value", name = "CustomName" });
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListResult));
}
[Fact]
public void DropDownList_UsesExpressionAndSpecifiedSelectListAndOptionLabel()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property2]]\" name=\"HtmlEncode[[Property2]]\">" +
"<option value=\"\">HtmlEncode[[--select--]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[4]]\">HtmlEncode[[Four]]</option>" + Environment.NewLine +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[5]]\">HtmlEncode[[Five]]</option>" + Environment.NewLine +
"</select>";
var selectList = new List<SelectListItem>
{
new SelectListItem("Four", "4"),
new SelectListItem("Five", "5"),
};
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.Model = new TestModel { Property2 = "5" };
// Act
var dropDownListResult = helper.DropDownList("Property2", selectList, "--select--");
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListResult));
}
[Fact]
public void DropDownListFor_NullSelectListFindsListFromViewData()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property1]]\" name=\"HtmlEncode[[Property1]]\">" +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[0]]\">HtmlEncode[[Zero]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[1]]\">HtmlEncode[[One]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[2]]\">HtmlEncode[[Two]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[3]]\">HtmlEncode[[Three]]</option>" + Environment.NewLine +
"</select>";
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData["Property1"] = BasicSelectList;
helper.ViewData.Model = new TestModel { Property1 = 0 };
// Act
var dropDownListForResult = helper.DropDownListFor(m => m.Property1, selectList: null);
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListForResult));
}
[Fact]
public void DropDownListFor_UsesSpecifiedExpressionAndSelectList()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property2]]\" name=\"HtmlEncode[[Property2]]\">" +
"<option value=\"HtmlEncode[[4]]\">HtmlEncode[[Four]]</option>" + Environment.NewLine +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[5]]\">HtmlEncode[[Five]]</option>" + Environment.NewLine +
"</select>";
var selectList = new List<SelectListItem>
{
new SelectListItem("Four", "4"),
new SelectListItem("Five", "5"),
};
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData["Property1"] = BasicSelectList;
helper.ViewData.Model = new TestModel { Property2 = "5" };
// Act
var dropDownListForResult = helper.DropDownListFor(m => m.Property2, selectList);
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListForResult));
}
[Fact]
public void DropDownListFor_UsesSpecifiedExpressionAndSelectListAndHtmlAttributes()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property3_2_]]\" Key=\"HtmlEncode[[Value]]\" name=\"HtmlEncode[[Property3[2]]]\">" +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[4]]\">HtmlEncode[[Four]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[5]]\">HtmlEncode[[Five]]</option>" + Environment.NewLine +
"</select>";
var selectList = new List<SelectListItem>
{
new SelectListItem("Four", "4"),
new SelectListItem("Five", "5"),
};
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.Model = new TestModel { Property3 = new List<string> { "0", "2", "4" } };
// Act
var dropDownListForResult = helper.DropDownListFor(m => m.Property3[2], selectList, new { Key = "Value", name = "CustomName" });
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListForResult));
}
[Fact]
public void DropDownListFor_UsesSpecifiedSelectListAndOptionLabel()
{
// Arrange
var expectedHtml = "<select id=\"HtmlEncode[[Property2]]\" name=\"HtmlEncode[[Property2]]\">" +
"<option value=\"\">HtmlEncode[[--select--]]</option>" + Environment.NewLine +
"<option value=\"HtmlEncode[[4]]\">HtmlEncode[[Four]]</option>" + Environment.NewLine +
"<option selected=\"HtmlEncode[[selected]]\" value=\"HtmlEncode[[5]]\">HtmlEncode[[Five]]</option>" + Environment.NewLine +
"</select>";
var selectList = new List<SelectListItem>
{
new SelectListItem("Four", "4"),
new SelectListItem("Five", "5"),
};
var metadataProvider = new EmptyModelMetadataProvider();
var helper = DefaultTemplatesUtilities.GetHtmlHelper(new ViewDataDictionary<TestModel>(metadataProvider));
helper.ViewContext.ClientValidationEnabled = false;
helper.ViewData.Model = new TestModel { Property2 = "5" };
// Act
var dropDownListForResult = helper.DropDownListFor(m => m.Property2, selectList, "--select--");
// Assert
Assert.Equal(expectedHtml, HtmlContentUtilities.HtmlContentToString(dropDownListForResult));
}
private class TestModel
{
public int Property1 { get; set; }
public string Property2 { get; set; }
public List<string> Property3 { get; set; }
}
}
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