Improve test utility and add docs

sebaslogen · Aug 1, 2022 · 870115c · 870115c
1 parent 44448f4
commit 870115c
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/sample/src/test/java/com/sebaslogen/resacaapp/utils/ComposeTestUtils.kt b/sample/src/test/java/com/sebaslogen/resacaapp/utils/ComposeTestUtils.kt
@@ -53,6 +53,11 @@ interface ComposeTestUtils {
             .value as List<AnnotatedString>).first().toString()
 }
 
+/**
+ * Get the existing [ComposeView] from the Activity and set the Compose content there, but only if the ComposeView already exists.
+ * Otherwise, just call [AndroidComposeTestRule.setContent] to create a new [ComposeView], add the view to the Activity and set its Compose content.
+ */
 fun AndroidComposeTestRule<ActivityScenarioRule<ComposeActivity>, ComposeActivity>.clearAndSetContent(content: @Composable () -> Unit) {
-    (this.activity.findViewById<ViewGroup>(android.R.id.content).getChildAt(0) as ComposeView).setContent(content)
+    (this.activity.findViewById<ViewGroup>(android.R.id.content)?.getChildAt(0) as? ComposeView)?.setContent(content)
+        ?: this.setContent(content)
 }