public void NonNullKeySelectorComparerThrowsWhenFirstItemIsNullAndSecondItemIsNull() { var comparer = new NonNullKeySelectorComparer <KeySelectorTestItem, int>(i => i.Id); KeySelectorTestItem first = null; KeySelectorTestItem second = null; Assert.Throws <ArgumentNullException>(() => comparer.Compare(first, second)); }
public void KeySelectorComparerReturnsZeroWhenFirstItemIsNullAndSecondItemIsNull() { var comparer = new KeySelectorComparer <KeySelectorTestItem, int>(i => i.Id); KeySelectorTestItem first = null; KeySelectorTestItem second = null; var result = comparer.Compare(first, second); Assert.AreEqual(0, result); }
public void KeySelectorComparerRetunsNegativeOneWhenFirstItemIsNullAndSecondItemIsNot() { var comparer = new KeySelectorComparer <KeySelectorTestItem, int>(i => i.Id); KeySelectorTestItem first = null; KeySelectorTestItem second = new KeySelectorTestItem { Id = 1 }; var result = comparer.Compare(first, second); Assert.AreEqual(-1, result); }
public void NonNullKeySelectorComparerReturnsZeroWhenFirstKeyIsEqualToSecondKey() { var comparer = new NonNullKeySelectorComparer <KeySelectorTestItem, int>(i => i.Id); var first = new KeySelectorTestItem { Id = 1 }; var second = new KeySelectorTestItem { Id = 1 }; var result = comparer.Compare(first, second); Assert.AreEqual(0, result); }
public void NonNullKeySelectorComparerReturnsNegativeOneWhenFirstKeyIsLessThanSecondKey() { var comparer = new NonNullKeySelectorComparer <KeySelectorTestItem, int>(i => i.Id); var first = new KeySelectorTestItem { Id = 1 }; var second = new KeySelectorTestItem { Id = 2 }; var result = comparer.Compare(first, second); Assert.AreEqual(-1, result); }
public void KeySelectorComparerReturnsPositiveOneWhenFirstKeyIsGreaterThanSecondKey() { var comparer = new KeySelectorComparer <KeySelectorTestItem, int>(i => i.Id); var first = new KeySelectorTestItem { Id = 2 }; var second = new KeySelectorTestItem { Id = 1 }; var result = comparer.Compare(first, second); Assert.AreEqual(1, result); }