public void TestZipWhenValid()
{
int[] numbers = { 1, 2, 3, 4 };
string[] words = { "one", "two", "three", "nine", "six" };
var result = LinqFunctions.Zip(numbers, words, (first, second) => first + " " + second);
Assert.True(result.Contains("3 three"));
}
public void TestZipExceptions()
{
int[] numbers = null;
string[] words = { "one", "two", "three", "nine", "six" };
var result = LinqFunctions.Zip(numbers, words, (first, second) => first + " " + second);
var exception = Assert.Throws <ArgumentNullException>(() => result.Count());
Assert.Equal("source", exception.ParamName);
}
