public void TestFirstWhenDoesntExists()
{
var array = new int[] { 2, 5, 3 };
Func <int, bool> myFunc = (x) => { return(x == 4); };
Assert.Throws <InvalidOperationException>(() => LINQFunctions.First(array, p => myFunc(p)));
}
public void TestFirstWhenThrowingExceptions()
{
int[] array = null;
Func <int, bool> myFunc = (x) => { return(x == 4); };
Assert.Throws <ArgumentNullException>(() => LINQFunctions.First(array, p => myFunc(p)));
}
public void TestFirstWhenExists()
{
var array = new int[] { 2, 4, 3 };
Func <int, bool> myFunc = (x) => { return(x == 4); };
var result = LINQFunctions.First(array, p => myFunc(p));
Assert.Equal(4, result);
}
