public void Visit_CompareSameMethodsOnSameObject_ThrowsWarning()
{
var account = new Account();
var inspector = new InspectExpressionVisitor();
Expression<Func<bool>> expression = () => account.GetName() == account.GetName();
TestDelegate action = () => inspector.Visit(expression);
Assert.That(action, Throws.TypeOf<InspectionWarning>());
}
public void Visit_ComparisonOfDefaultValueForReferenceType_Warns()
{
Account account = null;
Account otherAccount = null;
var inspector = new InspectExpressionVisitor();
Expression<Func<bool>> expression = () => account == otherAccount;
TestDelegate action = () => inspector.Visit(expression);
Assert.That(action, Throws.TypeOf<DefaultValueWarning>().With.Message.EqualTo("Comparison where both values are null."));
}
public void Visit_CompareSameMethodsOnDifferntObjects_ThrowsWarning()
{
var account = new Account();
account.SetName("A");
var otherAccount = new Account();
account.SetName("B");
var inspector = new InspectExpressionVisitor();
Expression<Func<bool>> expression = () => account.GetMe().GetName() == otherAccount.GetMe().GetName();
TestDelegate action = () => inspector.Visit(expression);
Assert.That(action, Throws.Nothing);
}
public void Visit_ComparisonOfNotDefaultValueForValueType_DoesNotWarn()
{
int a = 1;
int b = default(int);
var inspector = new InspectExpressionVisitor();
Expression<Func<bool>> expression = () => a == b;
TestDelegate action = () => inspector.Visit(expression);
Assert.That(action, Throws.Nothing);
}
public void Visit_ComparisonOfDefaultValueForValueType_Warns()
{
int a = default(int);
int b = default(int);
var inspector = new InspectExpressionVisitor();
Expression<Func<bool>> expression = () => a == b;
TestDelegate action = () => inspector.Visit(expression);
Assert.That(action, Throws.TypeOf<DefaultValueWarning>().With.Message.EqualTo("Comparison of value types where both are the default value."));
}
public void Visit_DifferentMembers_DoesNotThrowWarning()
{
var account = new Account();
var otherAccount = new Account();
var inspector = new InspectExpressionVisitor();
Expression<Func<bool>> expression = () => account == otherAccount;
TestDelegate action = () => inspector.Visit(expression);
Assert.That(action, Throws.Nothing);
}