Test FragmentScenario lifecycle ordering

Add a test to confirm that Lifecycle observers
added as part of a FragmentFactory allow
developers to access Lifecycle methods prior to
FragmentScenario returning.

Test: newly added test
Change-Id: I53de1ea4052a96f8d1beb366a4a80a15fbc75556

diff --git a/fragment/testing/src/androidTest/java/androidx/fragment/app/testing/FragmentScenarioTest.kt b/fragment/testing/src/androidTest/java/androidx/fragment/app/testing/FragmentScenarioTest.kt
index 127026f..2e23e94 100644
--- a/fragment/testing/src/androidTest/java/androidx/fragment/app/testing/FragmentScenarioTest.kt
+++ b/fragment/testing/src/androidTest/java/androidx/fragment/app/testing/FragmentScenarioTest.kt

@@ -18,7 +18,10 @@
 
 import android.os.Bundle
 import androidx.fragment.app.FragmentFactory
+import androidx.fragment.testing.test.R.id.view_tag_id
 import androidx.fragment.testing.test.R.style.ThemedFragmentTheme
+import androidx.lifecycle.GenericLifecycleObserver
+import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.Lifecycle.State
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.espresso.Espresso.onView
@@ -188,6 +191,33 @@
     }
 
     @Test
+    fun launchInContainerWithEarlyLifecycleCallbacks() {
+        var tagSetBeforeOnStart = false
+        with(launchFragmentInContainer {
+            StateRecordingFragment().also { fragment ->
+                fragment.viewLifecycleOwnerLiveData.observeForever { viewLifecycleOwner ->
+                    if (viewLifecycleOwner != null) {
+                        fragment.requireView().setTag(view_tag_id, "fakeNavController")
+                    }
+                }
+                fragment.lifecycle.addObserver(GenericLifecycleObserver { _, event ->
+                    if (event == Lifecycle.Event.ON_START) {
+                        tagSetBeforeOnStart =
+                            fragment.requireView().getTag(view_tag_id) == "fakeNavController"
+                    }
+                })
+            }
+        }) {
+            assertThat(tagSetBeforeOnStart).isTrue()
+            onFragment { fragment ->
+                assertThat(fragment.state).isEqualTo(State.RESUMED)
+                assertThat(fragment.numberOfRecreations).isEqualTo(0)
+                assertThat(fragment.isViewAttachedToWindow).isTrue()
+            }
+        }
+    }
+
+    @Test
     fun fromResumedToCreated() {
         with(launchFragmentInContainer<StateRecordingFragment>()) {
             moveToState(State.CREATED)

diff --git a/fragment/testing/src/androidTest/res/values/ids.xml b/fragment/testing/src/androidTest/res/values/ids.xml
new file mode 100644
index 0000000..6f11f71
--- /dev/null
+++ b/fragment/testing/src/androidTest/res/values/ids.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2019 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License 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.
+  -->
+
+<resources>
+    <item type="id" name="view_tag_id" />
+</resources>
\ No newline at end of file