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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using Moq;
using Xunit;
namespace System.Web.Mvc.Test
{
public class ParameterInfoUtilTest
{
[Fact]
public void TryGetDefaultValue_FirstChecksDefaultValue()
{
// Arrange
Mock<ParameterInfo> mockPInfo = new Mock<ParameterInfo>() { DefaultValue = DefaultValue.Mock };
mockPInfo.Setup(p => p.DefaultValue).Returns(42);
mockPInfo.Setup(p => p.Name).Returns("someParameter");
// Act
object defaultValue;
bool retVal = ParameterInfoUtil.TryGetDefaultValue(mockPInfo.Object, out defaultValue);
// Assert
Assert.True(retVal);
Assert.Equal(42, defaultValue);
}
[Fact]
public void TryGetDefaultValue_SecondChecksDefaultValueAttribute()
{
// Arrange
ParameterInfo pInfo = typeof(MyController).GetMethod("DefaultValues").GetParameters()[1]; // hasDefaultValue
// Act
object defaultValue;
bool retVal = ParameterInfoUtil.TryGetDefaultValue(pInfo, out defaultValue);
// Assert
Assert.True(retVal);
Assert.Equal("someValue", defaultValue);
}
[Fact]
public void TryGetDefaultValue_RespectsNullDefaultValue()
{
// Arrange
Mock<ParameterInfo> mockPInfo = new Mock<ParameterInfo>() { DefaultValue = DefaultValue.Mock };
mockPInfo.Setup(p => p.DefaultValue).Returns(null);
mockPInfo.Setup(p => p.Name).Returns("someParameter");
mockPInfo
.Setup(p => p.GetCustomAttributes(typeof(DefaultValueAttribute[]), false))
.Returns(new DefaultValueAttribute[] { new DefaultValueAttribute(42) });
// Act
object defaultValue;
bool retVal = ParameterInfoUtil.TryGetDefaultValue(mockPInfo.Object, out defaultValue);
// Assert
Assert.True(retVal);
Assert.Null(defaultValue);
}
[Fact]
public void TryGetDefaultValue_ReturnsFalseIfNoDefaultValue()
{
// Arrange
ParameterInfo pInfo = typeof(MyController).GetMethod("DefaultValues").GetParameters()[0]; // noDefaultValue
// Act
object defaultValue;
bool retVal = ParameterInfoUtil.TryGetDefaultValue(pInfo, out defaultValue);
// Assert
Assert.False(retVal);
Assert.Equal(default(object), defaultValue);
}
[Fact]
public void TryGetDefaultValue_DefaultValueAttributeParameters()
{
DefaultValueAttributeHelper<bool>(true, "boolParam");
DefaultValueAttributeHelper<byte>(42, "byteParam");
DefaultValueAttributeHelper<char>('a', "charParam");
DefaultValueAttributeHelper<double>(1.0, "doubleParam");
DefaultValueAttributeHelper<MyEnum>(MyEnum.All, "enumParam");
DefaultValueAttributeHelper<float>((float)1.0, "floatParam");
DefaultValueAttributeHelper<int>(42, "intParam");
DefaultValueAttributeHelper<long>(42, "longParam");
DefaultValueAttributeHelper<object>(null, "objectParam");
DefaultValueAttributeHelper<short>(42, "shortParam");
DefaultValueAttributeHelper<string>("abc", "stringParam");
DefaultValueAttributeHelper<DateTime>(new DateTime(2010, 09, 27), "customParam");
}
[Fact]
public void TryGetDefaultValue_OptionalParameters()
{
OptionalParamHelper<bool>(true, "boolParam");
OptionalParamHelper<byte>(42, "byteParam");
OptionalParamHelper<char>('a', "charParam");
OptionalParamHelper<double>(1.0, "doubleParam");
OptionalParamHelper<MyEnum>(MyEnum.All, "enumParam");
OptionalParamHelper<float>((float)1.0, "floatParam");
OptionalParamHelper<int>(42, "intParam");
OptionalParamHelper<long>(42, "longParam");
OptionalParamHelper<object>(null, "objectParam");
OptionalParamHelper<short>(42, "shortParam");
OptionalParamHelper<string>("abc", "stringParam");
}
private static void DefaultValueAttributeHelper<TParam>(TParam expectedValue, string paramName)
{
ParameterTestHelper<TParam>(expectedValue, paramName, "AttributeDefaultValues");
}
private static void OptionalParamHelper<TParam>(TParam expectedValue, string paramName)
{
ParameterTestHelper<TParam>(expectedValue, paramName, "OptionalParamDefaultValues");
}
private static void ParameterTestHelper<TParam>(TParam expectedValue, string paramName, string actionMethodName)
{
ParameterInfo pInfo = typeof(MyController).GetMethod(actionMethodName).GetParameters().Single(p => p.Name == paramName);
object returnValueObject;
bool result = ParameterInfoUtil.TryGetDefaultValue(pInfo, out returnValueObject);
Assert.True(result);
if (expectedValue != null)
{
Assert.IsType<TParam>(returnValueObject);
}
TParam returnValue = (TParam)returnValueObject;
Assert.Equal<TParam>(expectedValue, returnValue);
}
private class MyController : Controller
{
public void DefaultValues(string noDefaultValue, [DefaultValue("someValue")] string hasDefaultValue)
{
}
public void AttributeDefaultValues(
[DefaultValue(true)] bool boolParam,
[DefaultValue((byte)42)] byte byteParam,
[DefaultValue('a')] char charParam,
[DefaultValue(typeof(DateTime), "2010-09-27")] object customParam,
[DefaultValue((double)1.0)] double doubleParam,
[DefaultValue(MyEnum.All)] MyEnum enumParam,
[DefaultValue((float)1.0)] float floatParam,
[DefaultValue(42)] int intParam,
[DefaultValue((long)42)] long longParam,
[DefaultValue(null)] object objectParam,
[DefaultValue((short)42)] short shortParam,
[DefaultValue("abc")] string stringParam
)
{
}
public void OptionalParamDefaultValues(
bool boolParam = true,
byte byteParam = 42,
char charParam = 'a',
double doubleParam = 1.0,
MyEnum enumParam = MyEnum.All,
float floatParam = (float)1.0,
int intParam = 42,
long longParam = 42,
object objectParam = null,
short shortParam = 42,
string stringParam = "abc"
)
{
}
}
private enum MyEnum
{
None = 0,
All = 1
}
}
}
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