forked from fluentassertions/fluentassertions
/
TypeAssertions.cs
1290 lines (1134 loc) · 75.8 KB
/
TypeAssertions.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using FluentAssertions.Common;
using FluentAssertions.Execution;
using FluentAssertions.Primitives;
namespace FluentAssertions.Types
{
/// <summary>
/// Contains a number of methods to assert that a <see cref="System.Type"/> meets certain expectations.
/// </summary>
[DebuggerNonUserCode]
public class TypeAssertions : ReferenceTypeAssertions<Type, TypeAssertions>
{
/// <summary>
/// Initializes a new instance of the <see cref="T:System.Object" /> class.
/// </summary>
public TypeAssertions(Type type)
{
Subject = type;
}
/// <summary>
/// Asserts that the current type is equal to the specified <typeparamref name="TExpected"/> type.
/// </summary>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> Be<TExpected>(string because = "", params object[] becauseArgs)
{
return Be(typeof(TExpected), because, becauseArgs);
}
/// <summary>
/// Asserts that the current type is equal to the specified <paramref name="expected"/> type.
/// </summary>
/// <param name="expected">The expected type</param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> Be(Type expected, string because = "", params object[] becauseArgs)
{
Execute.Assertion
.ForCondition(Subject.IsSameOrEqualTo(expected))
.BecauseOf(because, becauseArgs)
.FailWith(GetFailureMessageIfTypesAreDifferent(Subject, expected));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts than an instance of the subject type is assignable variable of type <typeparamref name="T"/>.
/// </summary>
/// <typeparam name="T">The type to which instances of the type should be assignable.</typeparam>
/// <param name="because">The reason why instances of the type should be assignable to the type.</param>
/// <param name="becauseArgs">The parameters used when formatting the <paramref name="because"/>.</param>
/// <returns>An <see cref="AndConstraint{T}"/> which can be used to chain assertions.</returns>
public new AndConstraint<TypeAssertions> BeAssignableTo<T>(string because = "", params object[] becauseArgs)
{
return BeAssignableTo(typeof(T), because, becauseArgs);
}
bool CheckIfAssignableToOpenGeneric(Type definition)
{
// The CLR type system does not consider anything to be assignable to an open generic type.
// For the purposes of test assertions, the user probably means that the subject type is
// assignable to any generic type based on the given generic type definition.
if (definition.GetTypeInfo().IsInterface)
{
// check subject and its interfaces against definition
TypeInfo subjectInfo = Subject.GetTypeInfo();
if (subjectInfo.IsInterface && subjectInfo.IsGenericType &&
subjectInfo.GetGenericTypeDefinition().IsSameOrEqualTo(definition))
{
return true;
}
foreach (TypeInfo iface in subjectInfo.ImplementedInterfaces.Select(i => i.GetTypeInfo()))
{
if (iface.IsGenericType && iface.GetGenericTypeDefinition().IsSameOrEqualTo(definition))
{
return true;
}
}
}
else
{
// check subject and its base types against definition
for (TypeInfo baseType = Subject.GetTypeInfo(); baseType != null;
baseType = baseType.BaseType?.GetTypeInfo())
{
if (baseType.IsGenericType && baseType.GetGenericTypeDefinition().IsSameOrEqualTo(definition))
{
return true;
}
}
}
return false;
}
/// <summary>
/// Asserts than an instance of the subject type is assignable variable of given <paramref name="type"/>.
/// </summary>
/// <param name="type">The type to which instances of the type should be assignable.</param>
/// <param name="because">The reason why instances of the type should be assignable to the type.</param>
/// <param name="becauseArgs"></param>
/// <returns>An <see cref="AndConstraint{T}"/> which can be used to chain assertions.</returns>
public new AndConstraint<TypeAssertions> BeAssignableTo(Type type, string because = "", params object[] becauseArgs)
{
bool condition;
if (type.GetTypeInfo().IsGenericTypeDefinition)
{
condition = CheckIfAssignableToOpenGeneric(type);
}
else
{
condition = type.IsAssignableFrom(Subject);
}
Execute.Assertion
.ForCondition(condition)
.BecauseOf(because, becauseArgs)
.FailWith(
"Expected {context:" + Identifier + "} {0} to be assignable to {1}{reason}, but it is not.",
Subject,
type);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts than an instance of the subject type is not assignable variable of type <typeparamref name="T"/>.
/// </summary>
/// <typeparam name="T">The type to which instances of the type should not be assignable.</typeparam>
/// <param name="because">The reason why instances of the type should not be assignable to the type.</param>
/// <param name="becauseArgs">The parameters used when formatting the <paramref name="because"/>.</param>
/// <returns>An <see cref="AndConstraint{T}"/> which can be used to chain assertions.</returns>
public new AndConstraint<TypeAssertions> NotBeAssignableTo<T>(string because = "", params object[] becauseArgs)
{
return NotBeAssignableTo(typeof(T), because, becauseArgs);
}
/// <summary>
/// Asserts than an instance of the subject type is not assignable variable of given <paramref name="type"/>.
/// </summary>
/// <param name="type">The type to which instances of the type should not be assignable.</param>
/// <param name="because">The reason why instances of the type should not be assignable to the type.</param>
/// <param name="becauseArgs"></param>
/// <returns>An <see cref="AndConstraint{T}"/> which can be used to chain assertions.</returns>
public new AndConstraint<TypeAssertions> NotBeAssignableTo(Type type, string because = "", params object[] becauseArgs)
{
bool condition;
if (type.GetTypeInfo().IsGenericTypeDefinition)
{
condition = !CheckIfAssignableToOpenGeneric(type);
}
else
{
condition = !type.IsAssignableFrom(Subject);
}
Execute.Assertion
.ForCondition(condition)
.BecauseOf(because, becauseArgs)
.FailWith(
"Expected {context:" + Identifier + "} {0} to not be assignable to {1}{reason}, but it is.",
Subject,
type);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Creates an error message in case the specified <paramref name="actual"/> type differs from the
/// <paramref name="expected"/> type.
/// </summary>
/// <returns>
/// An empty <see cref="string"/> if the two specified types are the same, or an error message that describes that
/// the two specified types are not the same.
/// </returns>
private static string GetFailureMessageIfTypesAreDifferent(Type actual, Type expected)
{
if (actual == expected)
{
return "";
}
string expectedType = expected?.FullName ?? "<null>";
string actualType = actual?.FullName ?? "<null>";
if (expectedType == actualType)
{
expectedType = "[" + expected.AssemblyQualifiedName + "]";
actualType = "[" + actual.AssemblyQualifiedName + "]";
}
return string.Format("Expected type to be {0}{{reason}}, but found {1}.", expectedType, actualType);
}
/// <summary>
/// Asserts that the current type is not equal to the specified <typeparamref name="TUnexpected"/> type.
/// </summary>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> NotBe<TUnexpected>(string because = "", params object[] becauseArgs)
{
return NotBe(typeof(TUnexpected), because, becauseArgs);
}
/// <summary>
/// Asserts that the current type is not equal to the specified <paramref name="unexpected"/> type.
/// </summary>
/// <param name="unexpected">The unexpected type</param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> NotBe(Type unexpected, string because = "", params object[] becauseArgs)
{
string nameOfUnexpectedType = (unexpected != null) ? $"[{unexpected.AssemblyQualifiedName}]" : "<null>";
Execute.Assertion
.ForCondition(Subject != unexpected)
.BecauseOf(because, becauseArgs)
.FailWith("Expected type not to be " + nameOfUnexpectedType + "{reason}, but it is.");
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is decorated with the specified <typeparamref name="TAttribute"/>.
/// </summary>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> BeDecoratedWith<TAttribute>(string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
Execute.Assertion
.ForCondition(Subject.IsDecoratedWith<TAttribute>())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be decorated with {1}{reason}, but the attribute was not found.",
Subject, typeof(TAttribute));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is decorated with an attribute of type <typeparamref name="TAttribute"/>
/// that matches the specified <paramref name="isMatchingAttributePredicate"/>.
/// </summary>
/// <param name="isMatchingAttributePredicate">
/// The predicate that the attribute must match.
/// </param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> BeDecoratedWith<TAttribute>(
Expression<Func<TAttribute, bool>> isMatchingAttributePredicate, string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
BeDecoratedWith<TAttribute>(because, becauseArgs);
Execute.Assertion
.ForCondition(Subject.HasMatchingAttribute(isMatchingAttributePredicate))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be decorated with {1} that matches {2}{reason}, but no matching attribute was found.",
Subject, typeof(TAttribute), isMatchingAttributePredicate.Body);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is decorated with, or inherits from a parent class, the specified <typeparamref name="TAttribute"/>.
/// </summary>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> BeDecoratedWithOrInherit<TAttribute>(string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
Execute.Assertion
.ForCondition(Subject.IsDecoratedWith<TAttribute>(true))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be decorated with or inherit {1}{reason}, but the attribute was not found.",
Subject, typeof(TAttribute));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is decorated with, or inherits from a parent class, an attribute of type <typeparamref name="TAttribute"/>
/// that matches the specified <paramref name="isMatchingAttributePredicate"/>.
/// </summary>
/// <param name="isMatchingAttributePredicate">
/// The predicate that the attribute must match.
/// </param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> BeDecoratedWithOrInherit<TAttribute>(
Expression<Func<TAttribute, bool>> isMatchingAttributePredicate, string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
BeDecoratedWithOrInherit<TAttribute>(because, becauseArgs);
Execute.Assertion
.ForCondition(Subject.HasMatchingAttribute(isMatchingAttributePredicate, true))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be decorated with or inherit {1} that matches {2}{reason}, but no matching attribute was found.",
Subject, typeof(TAttribute), isMatchingAttributePredicate.Body);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not decorated with the specified <typeparamref name="TAttribute"/>.
/// </summary>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> NotBeDecoratedWith<TAttribute>(string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
Execute.Assertion
.ForCondition(!Subject.IsDecoratedWith<TAttribute>())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to not be decorated with {1}{reason}, but the attribute was found.",
Subject, typeof(TAttribute));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not decorated with an attribute of type <typeparamref name="TAttribute"/>
/// that matches the specified <paramref name="isMatchingAttributePredicate"/>.
/// </summary>
/// <param name="isMatchingAttributePredicate">
/// The predicate that the attribute must match.
/// </param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> NotBeDecoratedWith<TAttribute>(
Expression<Func<TAttribute, bool>> isMatchingAttributePredicate, string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
Execute.Assertion
.ForCondition(!Subject.HasMatchingAttribute(isMatchingAttributePredicate))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to not be decorated with {1} that matches {2}{reason}, but a matching attribute was found.",
Subject, typeof(TAttribute), isMatchingAttributePredicate.Body);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not decorated with and does not inherit from a parent class, the specified <typeparamref name="TAttribute"/>.
/// </summary>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> NotBeDecoratedWithOrInherit<TAttribute>(string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
Execute.Assertion
.ForCondition(!Subject.IsDecoratedWith<TAttribute>(true))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to not be decorated with or inherit {1}{reason}, but the attribute was found.",
Subject, typeof(TAttribute));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not decorated with and does not inherit from a parent class, an attribute of type <typeparamref name="TAttribute"/>
/// that matches the specified <paramref name="isMatchingAttributePredicate"/>.
/// </summary>
/// <param name="isMatchingAttributePredicate">
/// The predicate that the attribute must match.
/// </param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
public AndConstraint<TypeAssertions> NotBeDecoratedWithOrInherit<TAttribute>(
Expression<Func<TAttribute, bool>> isMatchingAttributePredicate, string because = "", params object[] becauseArgs)
where TAttribute : Attribute
{
Execute.Assertion
.ForCondition(!Subject.HasMatchingAttribute(isMatchingAttributePredicate, true))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to not be decorated with or inherit {1} that matches {2}{reason}, but a matching attribute was found.",
Subject, typeof(TAttribute), isMatchingAttributePredicate.Body);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> implements Interface <paramref name="interfaceType"/>.
/// </summary>
/// <param name="interfaceType">The interface that should be implemented.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> Implement(Type interfaceType, string because = "", params object[] becauseArgs)
{
if (!interfaceType.GetTypeInfo().IsInterface)
{
throw new ArgumentException("Must be an interface Type.", nameof(interfaceType));
}
Execute.Assertion.ForCondition(Subject.GetInterfaces().Contains(interfaceType))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to implement interface {1}{reason}, but it does not.", Subject, interfaceType);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> implements Interface <typeparamref name="TInterface"/>.
/// </summary>
/// <typeparam name="TInterface">The interface that should be implemented.</typeparam>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> Implement<TInterface>(string because = "", params object[] becauseArgs)
where TInterface : class
{
return Implement(typeof(TInterface), because, becauseArgs);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> does not implement Interface <paramref name="interfaceType"/>.
/// </summary>
/// <param name="interfaceType">The interface that should be not implemented.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotImplement(Type interfaceType, string because = "", params object[] becauseArgs)
{
if (!interfaceType.GetTypeInfo().IsInterface)
{
throw new ArgumentException("Must be an interface Type.", nameof(interfaceType));
}
Execute.Assertion.ForCondition(!Subject.GetInterfaces().Contains(interfaceType))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to not implement interface {1}{reason}, but it does.", Subject, interfaceType);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> does not implement Interface <typeparamref name="TInterface"/>.
/// </summary>
/// <typeparam name="TInterface">The interface that should not be implemented.</typeparam>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotImplement<TInterface>(string because = "", params object[] becauseArgs)
where TInterface : class
{
return NotImplement(typeof(TInterface), because, becauseArgs);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is derived from <see cref="System.Type"/> <paramref name="baseType"/>.
/// </summary>
/// <param name="baseType">The Type that should be derived from.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> BeDerivedFrom(Type baseType, string because = "", params object[] becauseArgs)
{
if (baseType.GetTypeInfo().IsInterface)
{
throw new ArgumentException("Must not be an interface Type.", nameof(baseType));
}
Execute.Assertion.ForCondition(Subject.GetTypeInfo().IsSubclassOf(baseType))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be derived from {1}{reason}, but it is not.", Subject, baseType);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is derived from <typeparamref name="TBaseClass"/>.
/// </summary>
/// <typeparam name="TBaseClass">The Type that should be derived from.</typeparam>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> BeDerivedFrom<TBaseClass>(string because = "", params object[] becauseArgs)
where TBaseClass : class
{
return BeDerivedFrom(typeof(TBaseClass), because, becauseArgs);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not derived from <see cref="System.Type"/> <paramref name="baseType"/>.
/// </summary>
/// <param name="baseType">The Type that should not be derived from.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotBeDerivedFrom(Type baseType, string because = "", params object[] becauseArgs)
{
if (baseType.GetTypeInfo().IsInterface)
{
throw new ArgumentException("Must not be an interface Type.", nameof(baseType));
}
Execute.Assertion
.ForCondition(!Subject.GetTypeInfo().IsSubclassOf(baseType))
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} not to be derived from {1}{reason}, but it is.", Subject, baseType);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not derived from <typeparamref name="TBaseClass"/>.
/// </summary>
/// <typeparam name="TBaseClass">The Type that should not be derived from.</typeparam>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotBeDerivedFrom<TBaseClass>(string because = "", params object[] becauseArgs)
where TBaseClass : class
{
return NotBeDerivedFrom(typeof(TBaseClass), because, becauseArgs);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is sealed.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <returns></returns>
public AndConstraint<TypeAssertions> BeSealed(string because = "", params object[] becauseArgs)
{
AssertThatSubjectIsClass();
Execute.Assertion
.ForCondition(Subject.IsCSharpSealed())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be sealed{reason}.", Subject);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not sealed.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <returns></returns>
public AndConstraint<TypeAssertions> NotBeSealed(string because = "", params object[] becauseArgs)
{
AssertThatSubjectIsClass();
Execute.Assertion
.ForCondition(!Subject.IsCSharpSealed())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} not to be sealed{reason}.", Subject);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is abstract.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <returns></returns>
public AndConstraint<TypeAssertions> BeAbstract(string because = "", params object[] becauseArgs)
{
AssertThatSubjectIsClass();
Execute.Assertion
.ForCondition(Subject.IsCSharpAbstract())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be abstract{reason}.", Subject);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not abstract.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <returns></returns>
public AndConstraint<TypeAssertions> NotBeAbstract(string because = "", params object[] becauseArgs)
{
AssertThatSubjectIsClass();
Execute.Assertion
.ForCondition(!Subject.IsCSharpAbstract())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} not to be abstract{reason}.", Subject);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is static.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <returns></returns>
public AndConstraint<TypeAssertions> BeStatic(string because = "", params object[] becauseArgs)
{
AssertThatSubjectIsClass();
Execute.Assertion
.ForCondition(Subject.IsCSharpStatic())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} to be static{reason}.", Subject);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current <see cref="System.Type"/> is not static.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <returns></returns>
public AndConstraint<TypeAssertions> NotBeStatic(string because = "", params object[] becauseArgs)
{
AssertThatSubjectIsClass();
Execute.Assertion
.ForCondition(!Subject.IsCSharpStatic())
.BecauseOf(because, becauseArgs)
.FailWith("Expected type {0} not to be static{reason}.", Subject);
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type has a property of type <paramref name="propertyType"/> named <paramref name="name"/>.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <param name="propertyType">The type of the property.</param>
/// <param name="name">The name of the property.</param>
public AndWhichConstraint<TypeAssertions, PropertyInfo> HaveProperty(Type propertyType, string name, string because = "", params object[] becauseArgs)
{
PropertyInfo propertyInfo = Subject.GetPropertyByName(name);
string propertyInfoDescription = "";
if (propertyInfo != null)
{
propertyInfoDescription = PropertyInfoAssertions.GetDescriptionFor(propertyInfo);
}
Execute.Assertion.ForCondition(propertyInfo != null)
.BecauseOf(because, becauseArgs)
.FailWith($"Expected {propertyType.Name} {Subject.FullName}.{name} to exist{{reason}}, but it does not.");
Execute.Assertion.ForCondition(propertyInfo.PropertyType == propertyType)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to be of type {1}{{reason}}, but it is not.",
propertyInfoDescription, propertyType));
return new AndWhichConstraint<TypeAssertions, PropertyInfo>(this, propertyInfo);
}
/// <summary>
/// Asserts that the current type has a property of type <typeparamref name="TProperty"/> named <paramref name="name"/>.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndWhichConstraint<TypeAssertions, PropertyInfo> HaveProperty<TProperty>(string name, string because = "", params object[] becauseArgs)
{
return HaveProperty(typeof(TProperty), name, because, becauseArgs);
}
/// <summary>
/// Asserts that the current type does not have a property named <paramref name="name"/>.
/// </summary>
/// <param name="name">The name of the property.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotHaveProperty(string name, string because = "", params object[] becauseArgs)
{
PropertyInfo propertyInfo = Subject.GetPropertyByName(name);
string propertyInfoDescription = "";
if (propertyInfo != null)
{
propertyInfoDescription = PropertyInfoAssertions.GetDescriptionFor(propertyInfo);
}
Execute.Assertion.ForCondition(propertyInfo == null)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to not exist{{reason}}, but it does.", propertyInfoDescription));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type explicitly implements a property named
/// <paramref name="name"/> from interface <paramref name="interfaceType" />.
/// </summary>
/// <param name="interfaceType">The type of the interface.</param>
/// <param name="name">The name of the property.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> HaveExplicitProperty(Type interfaceType, string name, string because = "", params object[] becauseArgs)
{
Subject.Should().Implement(interfaceType, because, becauseArgs);
var explicitlyImplementsProperty = Subject.HasExplicitlyImplementedProperty(interfaceType, name);
Execute.Assertion.ForCondition(explicitlyImplementsProperty)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to explicitly implement {1}.{2}{{reason}}, but it does not.",
Subject.FullName, interfaceType.FullName, name));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type explicitly implements a property named
/// <paramref name="name"/> from interface <typeparamref name="TInterface"/>.
/// </summary>
/// <typeparam name="TInterface">The interface whose member is being explicitly implemented.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> HaveExplicitProperty<TInterface>(string name, string because = "", params object[] becauseArgs)
where TInterface : class
{
return HaveExplicitProperty(typeof(TInterface), name, because, becauseArgs);
}
/// <summary>
/// Asserts that the current type does not explicitly implement a property named
/// <paramref name="name"/> from interface <paramref name="interfaceType" />.
/// </summary>
/// <param name="interfaceType">The type of the interface.</param>
/// <param name="name">The name of the property.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotHaveExplicitProperty(Type interfaceType, string name, string because = "", params object[] becauseArgs)
{
Subject.Should().Implement(interfaceType, because, becauseArgs);
var explicitlyImplementsProperty = Subject.HasExplicitlyImplementedProperty(interfaceType, name);
Execute.Assertion.ForCondition(!explicitlyImplementsProperty)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to not explicitly implement {1}.{2}{{reason}}, but it does.",
Subject.FullName, interfaceType.FullName, name));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type does not explicitly implement a property named
/// <paramref name="name"/> from interface <typeparamref name="TInterface"/>.
/// </summary>
/// <typeparam name="TInterface">The interface whose member is not being explicitly implemented.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotHaveExplicitProperty<TInterface>(string name, string because = "", params object[] becauseArgs)
where TInterface : class
{
return NotHaveExplicitProperty(typeof(TInterface), name, because, becauseArgs);
}
/// <summary>
/// Asserts that the current type explicitly implements a method named <paramref name="name"/>
/// from interface <paramref name="interfaceType" />.
/// </summary>
/// <param name="interfaceType">The type of the interface.</param>
/// <param name="name">The name of the method.</param>
/// <param name="parameterTypes">The expected types of the method parameters.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> HaveExplicitMethod(Type interfaceType, string name, IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
{
Subject.Should().Implement(interfaceType, because, becauseArgs);
var explicitlyImplementsMethod = Subject.HasMethod(string.Format("{0}.{1}", interfaceType.FullName, name), parameterTypes);
Execute.Assertion.ForCondition(explicitlyImplementsMethod)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to explicitly implement {1}.{2}{{reason}}, but it does not.",
Subject.FullName, interfaceType.FullName, name));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type explicitly implements a method named <paramref name="name"/>
/// from interface <typeparamref name="TInterface"/>.
/// </summary>
/// <typeparam name="TInterface">The interface whose member is being explicitly implemented.</typeparam>
/// <param name="name">The name of the method.</param>
/// <param name="parameterTypes">The expected types of the method parameters.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> HaveExplicitMethod<TInterface>(string name, IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
where TInterface : class
{
return HaveExplicitMethod(typeof(TInterface), name, parameterTypes, because, becauseArgs);
}
/// <summary>
/// Asserts that the current type does not explicitly implement a method named <paramref name="name"/>
/// from interface <paramref name="interfaceType" />.
/// </summary>
/// <param name="interfaceType">The type of the interface.</param>
/// <param name="name">The name of the method.</param>
/// <param name="parameterTypes">The expected types of the method parameters.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotHaveExplicitMethod(Type interfaceType, string name, IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
{
Subject.Should().Implement(interfaceType, because, becauseArgs);
var explicitlyImplementsMethod = Subject.HasMethod(string.Format("{0}.{1}", interfaceType.FullName, name), parameterTypes);
Execute.Assertion.ForCondition(!explicitlyImplementsMethod)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to not explicitly implement {1}.{2}{{reason}}, but it does.",
Subject.FullName, interfaceType.FullName, name));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type does not explicitly implement a method named <paramref name="name"/>
/// from interface <typeparamref name="TInterface"/>.
/// </summary>
/// <typeparam name="TInterface">The interface whose member is not being explicitly implemented.</typeparam>
/// <param name="name">The name of the method.</param>
/// <param name="parameterTypes">The expected types of the method parameters.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndConstraint<TypeAssertions> NotHaveExplicitMethod<TInterface>(string name, IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
where TInterface : class
{
return NotHaveExplicitMethod(typeof(TInterface), name, parameterTypes, because, becauseArgs);
}
/// <summary>
/// Asserts that the current type has an indexer of type <paramref name="indexerType"/>.
/// with parameter types <paramref name="parameterTypes"/>.
/// </summary>
/// <param name="indexerType">The type of the indexer.</param>
/// <param name="parameterTypes">The parameter types for the indexer.</param>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
public AndWhichConstraint<TypeAssertions, PropertyInfo> HaveIndexer(Type indexerType, IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
{
PropertyInfo propertyInfo = Subject.GetIndexerByParameterTypes(parameterTypes);
string propertyInfoDescription = "";
if (propertyInfo != null)
{
propertyInfoDescription = PropertyInfoAssertions.GetDescriptionFor(propertyInfo);
}
Execute.Assertion.ForCondition(propertyInfo != null)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} {1}[{2}] to exist{{reason}}, but it does not.",
indexerType.Name, Subject.FullName,
GetParameterString(parameterTypes)));
Execute.Assertion.ForCondition(propertyInfo.PropertyType == indexerType)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected {0} to be of type {1}{{reason}}, but it is not.",
propertyInfoDescription, indexerType));
return new AndWhichConstraint<TypeAssertions, PropertyInfo>(this, propertyInfo);
}
/// <summary>
/// Asserts that the current type does not have an indexer that takes parameter types <paramref name="parameterTypes"/>.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <param name="parameterTypes">The expected indexer's parameter types.</param>
public AndConstraint<TypeAssertions> NotHaveIndexer(IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
{
PropertyInfo propertyInfo = Subject.GetIndexerByParameterTypes(parameterTypes);
Execute.Assertion.ForCondition(propertyInfo == null)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected indexer {0}[{1}] to not exist{{reason}}, but it does.",
Subject.FullName,
GetParameterString(parameterTypes)));
return new AndConstraint<TypeAssertions>(this);
}
/// <summary>
/// Asserts that the current type has a method named <paramref name="name"/>with parameter types <paramref name="parameterTypes"/>.
/// </summary>
/// <param name="because">A formatted phrase as is supported by <see cref="M:System.String.Format(System.String,System.Object[])"/> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.</param>
/// <param name="becauseArgs">Zero or more objects to format using the placeholders in <see cref="!:because"/>.</param>
/// <param name="name">The name of the method.</param>
/// <param name="parameterTypes">The parameter types for the indexer.</param>
public AndWhichConstraint<TypeAssertions, MethodInfo> HaveMethod(String name, IEnumerable<Type> parameterTypes, string because = "", params object[] becauseArgs)
{
MethodInfo methodInfo = Subject.GetMethod(name, parameterTypes);
Execute.Assertion.ForCondition(methodInfo != null)
.BecauseOf(because, becauseArgs)
.FailWith(string.Format("Expected method {0}.{1}({2}) to exist{{reason}}, but it does not.",
Subject.FullName, name,
GetParameterString(parameterTypes)));
return new AndWhichConstraint<TypeAssertions, MethodInfo>(this, methodInfo);
}