public void CreateEqualsExpressions_PassItemType_ProducesValidExpressionFor(
Type itemType, Type expectedBodyType, Type expectedDelegateType)
{
LambdaExpression expression = EqualsExpressions.CreateEqualsExpression(itemType);
Assert.AreEqual(2, expression.Parameters.Count);
Assert.IsTrue(expression.Parameters.All(p => p.Type == itemType));
Assert.AreEqual(typeof(bool), expression.ReturnType);
Assert.IsTrue(expectedBodyType.IsInstanceOfType(expression.Body));
Assert.AreEqual(expectedDelegateType, expression.Compile().GetType());
}
static DictionaryEqualityComparer()
{
var expressionCompiler = ExpressionCompiler.Default;
// ReSharper disable MultipleSpaces
KeyEqualsFunc = expressionCompiler.Compile((Expression <Func <TKey, TKey, bool> >)EqualsExpressions.CreateEqualsExpression(typeof(TKey) /*,typeof(TKey).IsArray*/));
KeyGetHashCodeFunc = expressionCompiler.Compile((Expression <Func <TKey, int> >)HashCodeExpressions.CreateGetHashCodeExpression(typeof(TKey) /*,typeof(TKey).IsArray*/));
ValueEqualsFunc = expressionCompiler.Compile((Expression <Func <TValue, TValue, bool> >)EqualsExpressions.CreateEqualsExpression(typeof(TValue) /*,typeof(TKey).IsArray*/));
ValueGetHashCodeFunc = expressionCompiler.Compile((Expression <Func <TValue, int> >)HashCodeExpressions.CreateGetHashCodeExpression(typeof(TValue) /*,typeof(TKey).IsArray*/));
IsValueNullFunc = expressionCompiler.Compile(NullableHelper.GetIsNullExpression <TValue>());
// ReSharper restore MultipleSpaces
}