test: convert activity tests to kotlin (#1246)

Author: fractalwrench

instrumentation/activity/src/test/java/io/opentelemetry/android/instrumentation/activity/ActivityCallbackTestHarness.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.android.instrumentation.activity
+
+import android.app.Activity
+import android.os.Bundle
+import org.mockito.Mockito
+
+internal class ActivityCallbackTestHarness(
+    private val callbacks: ActivityCallbacks,
+) {
+    fun runAppStartupLifecycle(mainActivity: Activity) {
+        // app startup lifecycle is the same as a normal activity lifecycle
+        runActivityCreationLifecycle(mainActivity)
+    }
+
+    fun runActivityCreationLifecycle(activity: Activity) {
+        val bundle = Mockito.mock(Bundle::class.java)
+        callbacks.onActivityPreCreated(activity, bundle)
+        callbacks.onActivityCreated(activity, bundle)
+        callbacks.onActivityPostCreated(activity, bundle)
+        runActivityStartedLifecycle(activity)
+        runActivityResumedLifecycle(activity)
+    }
+
+    fun runActivityStartedLifecycle(activity: Activity) {
+        callbacks.onActivityPreStarted(activity)
+        callbacks.onActivityStarted(activity)
+        callbacks.onActivityPostStarted(activity)
+    }
+
+    fun runActivityPausedLifecycle(activity: Activity) {
+        callbacks.onActivityPrePaused(activity)
+        callbacks.onActivityPaused(activity)
+        callbacks.onActivityPostPaused(activity)
+    }
+
+    fun runActivityResumedLifecycle(activity: Activity) {
+        callbacks.onActivityPreResumed(activity)
+        callbacks.onActivityResumed(activity)
+        callbacks.onActivityPostResumed(activity)
+    }
+
+    fun runActivityStoppedFromRunningLifecycle(activity: Activity) {
+        runActivityPausedLifecycle(activity)
+        runActivityStoppedFromPausedLifecycle(activity)
+    }
+
+    fun runActivityStoppedFromPausedLifecycle(activity: Activity) {
+        callbacks.onActivityPreStopped(activity)
+        callbacks.onActivityStopped(activity)
+        callbacks.onActivityPostStopped(activity)
+    }
+
+    fun runActivityDestroyedFromStoppedLifecycle(activity: Activity) {
+        callbacks.onActivityPreDestroyed(activity)
+        callbacks.onActivityDestroyed(activity)
+        callbacks.onActivityPostDestroyed(activity)
+    }
+
+    fun runActivityDestroyedFromPausedLifecycle(activity: Activity) {
+        runActivityStoppedFromPausedLifecycle(activity)
+        runActivityDestroyedFromStoppedLifecycle(activity)
+    }
+
+    fun runActivityDestroyedFromRunningLifecycle(activity: Activity) {
+        runActivityStoppedFromRunningLifecycle(activity)
+        runActivityDestroyedFromStoppedLifecycle(activity)
+    }
+
+    fun runActivityRestartedLifecycle(activity: Activity) {
+        runActivityStartedLifecycle(activity)
+        runActivityResumedLifecycle(activity)
+    }
+}