Amazon.DNXCore.IntegrationTests.General.TestCredentials C# (CSharp) Method

        private static async Task TestCredentials(ProxyRefreshingAWSCredentials creds, bool expectFailure)
        {
            using (var client = new AmazonS3Client(creds))
            {
                try
                {
                    await client.ListBucketsAsync();
                    Assert.False(expectFailure);
                }
                catch (AmazonClientException ace)
                {
                    Assert.True(expectFailure);
                    Assert.NotNull(ace);
                    Assert.NotNull(ace.Message);
                    Assert.True(ace.Message.IndexOf("already") >= 0);
                }
            }
        }