public void Malformed_Weird() { var empty = new EmptyEnumerable <int>(); var emptyOrdered = new EmptyOrderedEnumerable <int>(); var groupByDefault = new GroupByDefaultEnumerable <int, int, int, EmptyEnumerable <int>, EmptyEnumerator <int> >(); var groupBySpecific = new GroupBySpecificEnumerable <int, int, int, EmptyEnumerable <int>, EmptyEnumerator <int> >(); var lookupDefault = new LookupDefaultEnumerable <int, int>(); var lookupSpecific = new LookupSpecificEnumerable <int, int>(); var range = new RangeEnumerable(); var repeat = new RepeatEnumerable <int>(); var reverseRange = new ReverseRangeEnumerable(); var oneItemDefault = new OneItemDefaultEnumerable <int>(); var oneItemSpecific = new OneItemSpecificEnumerable <int>(); var oneItemDefaultOrdered = new OneItemDefaultOrderedEnumerable <int>(); var oneItemSpecificOrdered = new OneItemSpecificOrderedEnumerable <int>(); // empty { try { empty.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { empty.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // emptyOrdered { try { emptyOrdered.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { emptyOrdered.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // groupByDefault { try { groupByDefault.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { groupByDefault.Distinct(new _GroupingComparer <int>()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // groupBySpecific { try { groupBySpecific.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { groupBySpecific.Distinct(new _GroupingComparer <int>()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // lookupDefault { try { lookupDefault.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { lookupDefault.Distinct(new _GroupingComparer <int>()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // lookupSpecific { try { lookupSpecific.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { lookupSpecific.Distinct(new _GroupingComparer <int>()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // range { try { range.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { range.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // repeat { try { repeat.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { repeat.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // reverseRange { try { reverseRange.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { reverseRange.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // oneItemDefault { try { oneItemDefault.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { oneItemDefault.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // oneItemSpecific { try { oneItemSpecific.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { oneItemSpecific.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // oneItemDefaultOrdered { try { oneItemDefaultOrdered.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { oneItemDefaultOrdered.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } // oneItemSpecificOrdered { try { oneItemSpecificOrdered.Distinct(); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } try { oneItemSpecificOrdered.Distinct(new _IntComparer()); Assert.Fail(); } catch (ArgumentException exc) { Assert.AreEqual("source", exc.ParamName); } } }