fix(analytics): Set start time before generating session ID (#2747)

aws-pinpoint-core/build.gradle.kts

@@ -39,6 +39,7 @@ dependencies {
     testImplementation(libs.test.robolectric)
     testImplementation(libs.test.androidx.core)
     testImplementation(libs.test.kotlin.coroutines)
+    testImplementation(libs.test.kotest.assertions)
 
     androidTestImplementation(libs.test.androidx.core)
     androidTestImplementation(libs.test.androidx.runner)

aws-pinpoint-core/src/main/java/com/amplifyframework/pinpoint/core/AnalyticsClient.kt

@@ -96,7 +96,7 @@ class AnalyticsClient(
         eventTimestamp: Long = System.currentTimeMillis(),
         eventId: String = UUID.randomUUID().toString()
     ): PinpointEvent {
-        val session = sessionClient?.session ?: Session(context, uniqueId)
+        val session = sessionClient?.session ?: Session(uniqueId)
         return createEvent(
             eventType,
             session.sessionId,

aws-pinpoint-core/src/main/java/com/amplifyframework/pinpoint/core/Session.kt

@@ -14,7 +14,6 @@
  */
 package com.amplifyframework.pinpoint.core
 
-import android.content.Context
 import com.amplifyframework.annotations.InternalAmplifyApi
 import java.text.SimpleDateFormat
 import java.util.Locale
@@ -53,11 +52,10 @@ class Session {
     }
 
     constructor(
-        context: Context,
         uniqueId: String
     ) {
-        this@Session.sessionId = generateSessionId(uniqueId)
         this@Session.startTime = System.currentTimeMillis()
+        this@Session.sessionId = generateSessionId(uniqueId)
         this@Session.stopTime = null
     }
 

aws-pinpoint-core/src/main/java/com/amplifyframework/pinpoint/core/SessionClient.kt

@@ -23,7 +23,7 @@ class SessionClient(
     private val context: Context,
     val targetingClient: TargetingClient,
     private val uniqueId: String,
-    var analyticsClient: AnalyticsClient? = null,
+    var analyticsClient: AnalyticsClient? = null
 ) {
 
     var session: Session? = null
@@ -66,7 +66,7 @@ class SessionClient(
 
     private fun executeStart() {
         targetingClient.updateEndpointProfile()
-        val newSession = Session(context, uniqueId)
+        val newSession = Session(uniqueId)
         session = newSession
         analyticsClient?.let {
             val pinpointEvent = it.createEvent(

aws-pinpoint-core/src/test/java/com/amplifyframework/pinpoint/core/SessionTest.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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.
+ */
+
+package com.amplifyframework.pinpoint.core
+
+import io.kotest.matchers.equals.shouldNotBeEqual
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+
+class SessionTest {
+    @Test
+    fun `sessions created at different times have different session IDs`() = runTest {
+        val uniqueId = "id"
+        val session = Session(uniqueId)
+        delay(10)
+        val session2 = Session(uniqueId)
+
+        session.sessionId shouldNotBeEqual session2.sessionId
+    }
+}