Adds tests for log configuration of Otlp{Metric|Trace}Exporter

Author: BennettSmith

Tests/ExportersTests/OpenTelemetryProtocol/OtlpMetricExporterTests.swift

@@ -1,5 +1,6 @@
 
 import Foundation
+import Logging
 import GRPC
 import NIO
 import OpenTelemetryApi
@@ -37,6 +38,23 @@ class OtlpMetricExproterTests: XCTestCase {
         exporter.shutdown()
     }
 
+    func testImplicitGrpcLoggingConfig() throws {
+        let exporter = OtlpMetricExporter(channel: channel)
+        guard let logger = exporter.callOptions?.logger else {
+            throw "Missing logger"
+        }
+        XCTAssertEqual(logger.label, "io.grpc")
+    }
+
+    func testExplicitGrpcLoggingConfig() throws {
+        let exporter = OtlpMetricExporter(channel: channel, logger: Logger(label: "my.grpc.logger"))
+        guard let logger = exporter.callOptions?.logger else {
+            throw "Missing logger"
+        }
+        XCTAssertEqual(logger.label, "my.grpc.logger")
+    }
+
+
     func testGaugeExport() {
         let metric = generateGaugeMetric()
         let exporter = OtlpMetricExporter(channel: channel)

Tests/ExportersTests/OpenTelemetryProtocol/OtlpTraceExporterTests.swift

@@ -4,13 +4,18 @@
  */
 
 import Foundation
+import Logging
 import GRPC
 import NIO
 import OpenTelemetryApi
 @testable import OpenTelemetryProtocolExporter
 @testable import OpenTelemetrySdk
 import XCTest
 
+extension String: LocalizedError {
+    public var errorDescription: String? { return self }
+}
+
 class OtlpTraceExporterTests: XCTestCase {
     let traceId = "00000000000000000000000000abc123"
     let spanId = "0000000000def456"
@@ -42,6 +47,22 @@ class OtlpTraceExporterTests: XCTestCase {
         exporter.shutdown()
     }
 
+    func testImplicitGrpcLoggingConfig() throws {
+        let exporter = OtlpTraceExporter(channel: channel)
+        guard let logger = exporter.callOptions?.logger else {
+            throw "Missing logger"
+        }
+        XCTAssertEqual(logger.label, "io.grpc")
+    }
+
+    func testExplicitGrpcLoggingConfig() throws {
+        let exporter = OtlpTraceExporter(channel: channel, logger: Logger(label: "my.grpc.logger"))
+        guard let logger = exporter.callOptions?.logger else {
+            throw "Missing logger"
+        }
+        XCTAssertEqual(logger.label, "my.grpc.logger")
+    }
+
     func testExportMultipleSpans() {
         var spans = [SpanData]()
         for _ in 0 ..< 10 {