test: add mazerunner scenarios for stopping/resuming a session

when a session is stopped, no session information should be present in error payloads.

features/fixtures/mazerunner/src/main/java/com/bugsnag/android/mazerunner/scenarios/ResumedSessionScenario.kt

@@ -0,0 +1,35 @@
+package com.bugsnag.android.mazerunner.scenarios
+
+import android.content.Context
+import com.bugsnag.android.Bugsnag
+import com.bugsnag.android.Configuration
+import android.os.Handler
+import android.os.HandlerThread
+
+/**
+ * Sends 2 exceptions, 1 before resuming a session, and 1 after resuming a session.
+ */
+internal class ResumedSessionScenario(config: Configuration,
+                                      context: Context) : Scenario(config, context) {
+    init {
+        config.setAutoCaptureSessions(false)
+    }
+
+    override fun run() {
+        super.run()
+        val client = Bugsnag.getClient()
+        val thread = HandlerThread("HandlerThread")
+        thread.start()
+
+        Handler(thread.looper).post {
+            // send 1st exception
+            client.startSession()
+            client.notifyBlocking(generateException())
+
+            // send 2nd exception after resuming a session
+            client.stopSession()
+            client.resumeSession()
+            client.notifyBlocking(generateException())
+        }
+    }
+}

features/fixtures/mazerunner/src/main/java/com/bugsnag/android/mazerunner/scenarios/StoppedSessionScenario.kt

@@ -0,0 +1,34 @@
+package com.bugsnag.android.mazerunner.scenarios
+
+import android.content.Context
+import com.bugsnag.android.Bugsnag
+import com.bugsnag.android.Configuration
+import android.os.Handler
+import android.os.HandlerThread
+
+/**
+ * Sends an exception after stopping the session
+ */
+internal class StoppedSessionScenario(config: Configuration,
+                                      context: Context) : Scenario(config, context) {
+    init {
+        config.setAutoCaptureSessions(false)
+    }
+
+    override fun run() {
+        super.run()
+        val client = Bugsnag.getClient()
+        val thread = HandlerThread("HandlerThread")
+        thread.start()
+
+        Handler(thread.looper).post {
+            // send 1st exception which should include session info
+            client.startSession()
+            client.notifyBlocking(generateException())
+
+            // send 2nd exception which should not include session info
+            client.stopSession()
+            client.notifyBlocking(generateException())
+        }
+    }
+}

features/session_stopping.feature

@@ -0,0 +1,19 @@
+Feature: Stopping and resuming sessions
+
+Scenario: When a session is stopped the error has no session information
+    When I run "StoppedSessionScenario"
+    Then I should receive 3 requests
+    And the request 0 is valid for the session tracking API
+    And the request 1 is valid for the error reporting API
+    And the request 2 is valid for the error reporting API
+    And the payload field "events.0.session" is not null for request 1
+    And the payload field "events.0.session" is null for request 2
+
+Scenario: When a session is resumed the error uses the previous session information
+    When I run "ResumedSessionScenario"
+    Then I should receive 3 requests
+    And the request 0 is valid for the session tracking API
+    And the request 1 is valid for the error reporting API
+    And the request 2 is valid for the error reporting API
+    And the payload field "events.0.session.events.handled" equals 1 for request 1
+    And the payload field "events.0.session.events.handled" equals 2 for request 2