// <copyright file="MeterProviderTests.cs" company="OpenTelemetry Authors">
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>

using OpenTelemetry.Exporter;
using Xunit;

namespace OpenTelemetry.Metrics.Tests
{
    public class MeterProviderTests
    {
        [Fact]
        public void MeterProviderFindExporterTest()
        {
            var exportedItems = new List<Metric>();
            using var meterProvider = Sdk.CreateMeterProviderBuilder()
                .AddInMemoryExporter(exportedItems)
                .Build();

            Assert.True(meterProvider.TryFindExporter(out InMemoryExporter<Metric> inMemoryExporter));
            Assert.False(meterProvider.TryFindExporter(out MyExporter myExporter));
        }

        private class MyExporter : BaseExporter<Metric>
        {
            public override ExportResult Export(in Batch<Metric> batch)
            {
                return ExportResult.Success;
            }
        }
    }
}
