ALinq.Tests.AsyncEnumerableFirstTests.FirstShouldReturnFirstElement C# (CSharp) Method

        public async Task FirstShouldReturnFirstElement()
        {
            Assert.AreEqual(10,await AsyncEnumerable.Range(10,20).First());
#pragma warning disable 1998
            Assert.AreEqual(11,await AsyncEnumerable.Range(0,20).First(async i => i > 10 && i % 2 > 0));
#pragma warning restore 1998
            
            try
            {
#pragma warning disable 1998
                await AsyncEnumerable.Range(0, 1).First(async i => i > 3);
#pragma warning restore 1998
                Assert.Fail("No exception thrown");
            }
            catch( InvalidOperationException )
            {
                
            }
        }