void FromDelegate() { IComparer comp = null; Test.If.Action.ThrowsException(() => comp = DynamicComparer.FromDelegate(null), out ArgumentNullException ex1); Test.If.Value.IsEqual(ex1.ParamName, "compare"); Test.IfNot.Action.ThrowsException(() => comp = DynamicComparer.FromDelegate((x, y) => 21), out Exception ex2); }
void ComparisonInvokes() { IComparer comp = null; Int32 result = 0; comp = DynamicComparer.FromDelegate((x, y) => throw new NotImplementedException()); Test.If.Action.ThrowsException(() => result = comp.Compare(0, 1), out NotImplementedException ex1); comp = DynamicComparer.FromDelegate((x, y) => 42); Test.IfNot.Action.ThrowsException(() => result = comp.Compare(0, 1), out Exception ex2); Test.If.Value.IsEqual(result, 42); }
void FromDelegateT() { IComparer <Dummy> comp = null; Int32 result = 0; Test.If.Action.ThrowsException(() => comp = DynamicComparer.FromDelegate <Dummy>(null), out ArgumentNullException ex1); Test.If.Value.IsEqual(ex1.ParamName, "compare"); Test.IfNot.Action.ThrowsException(() => comp = DynamicComparer.FromDelegate <Dummy>((x, y) => 42), out Exception ex2); result = comp.Compare(0, 1); Test.If.Value.IsEqual(result, 42); }
void MaxIComparerT_ThrowsException() { IEnumerable <Dummy> notEmpty = new Dummy[] { null, -1, -1, null, 0, 1, 1 }; IEnumerable <Dummy> empty = Enumerable.Empty <Dummy>(); IEnumerable <Dummy> nulls = new Dummy[] { null, null }; Test.If.Action.ThrowsException(() => IEnumerableTExtensions.Maximum(null, null as IComparer <Dummy>), out ArgumentNullException ex1); Test.If.Value.IsEqual(ex1.ParamName, "_this"); Test.If.Action.ThrowsException(() => IEnumerableTExtensions.Maximum(null, DynamicComparer.FromDelegate <Dummy>((x, y) => 0)), out ex1); Test.If.Value.IsEqual(ex1.ParamName, "_this"); Test.If.Action.ThrowsException(() => notEmpty.Maximum(null as IComparer <Dummy>), out ex1); Test.If.Value.IsEqual(ex1.ParamName, "comparer"); Test.If.Action.ThrowsException(() => empty.Maximum(DynamicComparer.FromDelegate <Dummy>((x, y) => 0)), out ArgumentException ex2); Test.If.Value.IsEqual(ex2.ParamName, "_this"); Test.If.String.StartsWith(ex2.Message, "The enumeration is empty."); Test.If.Action.ThrowsException(() => nulls.Maximum(DynamicComparer.FromDelegate <Dummy>((x, y) => 0)), out ex2); Test.If.Value.IsEqual(ex2.ParamName, "_this"); Test.If.String.StartsWith(ex2.Message, "The enumeration only contains null values."); }