misc: override toString in business metrics (#1188)

Author: 0marperez

runtime/runtime-core/api/runtime-core.api

@@ -103,6 +103,7 @@ public final class aws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetri
 	public static final field WAITER Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static fun getEntries ()Lkotlin/enums/EnumEntries;
 	public fun getIdentifier ()Ljava/lang/String;
+	public fun toString ()Ljava/lang/String;
 	public static fun valueOf (Ljava/lang/String;)Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static fun values ()[Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 }

runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/businessmetrics/BusinessMetricsUtils.kt

@@ -90,4 +90,7 @@ public enum class SmithyBusinessMetric(public override val identifier: String) :
     SERVICE_ENDPOINT_OVERRIDE("N"),
     ACCOUNT_ID_BASED_ENDPOINT("O"),
     SIGV4A_SIGNING("S"),
+    ;
+
+    override fun toString(): String = identifier
 }

runtime/runtime-core/common/test/aws/smithy/kotlin/runtime/businessmetrics/BusinessMetricsUtilsTest.kt

@@ -7,6 +7,7 @@ package aws.smithy.kotlin.runtime.businessmetrics
 import aws.smithy.kotlin.runtime.collections.get
 import aws.smithy.kotlin.runtime.operation.ExecutionContext
 import kotlin.test.Test
+import kotlin.test.assertEquals
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue
 
@@ -55,4 +56,12 @@ class BusinessMetricsUtilsTest {
         executionContext.removeBusinessMetric(SmithyBusinessMetric.GZIP_REQUEST_COMPRESSION)
         assertFalse(executionContext.containsBusinessMetric(SmithyBusinessMetric.GZIP_REQUEST_COMPRESSION))
     }
+
+    @Test
+    fun businessMetricToString() {
+        val businessMetricToString = SmithyBusinessMetric.GZIP_REQUEST_COMPRESSION.toString()
+        val businessMetricIdentifier = SmithyBusinessMetric.GZIP_REQUEST_COMPRESSION.identifier
+
+        assertEquals(businessMetricIdentifier, businessMetricToString)
+    }
 }