public void MaybeDeep_nullFirstStep_returnsNull()
{
var instance = new MaybeTestHelper() {NestedInstance = null};
var actual = instance.MaybeDeep(x => x.NestedInstance.DeepProperty);
Assert.IsNull( actual);
}
public void MaybeDeep_NestedValue_returnsValue()
{
var expected = "expected";
var instance = new MaybeTestHelper()
{NestedInstance = new MaybeTestHelper() {DeepProperty =expected }};
var actual = instance.MaybeDeep(x => x.NestedInstance.DeepProperty);
Assert.AreEqual(expected, actual);
}
public void MaybeShallowNullable_value_returnsValue()
{
//arrange
var instance = new MaybeTestHelper();
var expected = MaybeTestHelper.HasValueConstant;
var actual = instance.MaybeShallowNullable(x => x.InstanceNullableIntFieldWithValue);
Assert.AreEqual(expected, actual.Value);
}
public void MaybeDeep_PrimitiveValue_ThrowsArgumentException()
{
var instance = new MaybeTestHelper();
try
{
var action = instance.MaybeDeep(x => x.InstanceIntField);
Assert.Fail("Did not throw exception");
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentException));
}
}
public void Maybe_NullableValueWithNull_ReturnsNull()
{
var instance = new MaybeTestHelper();
var actual = instance.MaybeDeep(x => x.InstanceNullableIntField);
Assert.IsNull(actual);
}
public void MaybeDeep_nullSecondStep_returnsNull()
{
var instance = new MaybeTestHelper()
{NestedInstance = new MaybeTestHelper() {NestedInstance = null}};
var actual = instance.MaybeDeep(i => i.NestedInstance.NestedInstance.DeepProperty);
}
public void Maybe_NullableValueWithValue_ReturnsValue()
{
var instance = new MaybeTestHelper();
int? expected = MaybeTestHelper.HasValueConstant;
var actual = instance.MaybeDeep(x => x.InstanceNullableIntFieldWithValue);
Assert.AreEqual(expected, actual);
}