Added TestDestinationsNavigator API.

compose-destinations/src/main/java/com/ramcosta/composedestinations/testing/TestDestinationsNavigator.kt

@@ -0,0 +1,24 @@
+package com.ramcosta.composedestinations.testing
+
+import androidx.lifecycle.Lifecycle
+import androidx.navigation.NavController
+import com.ramcosta.composedestinations.navigation.DestinationsNavController
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+
+/**
+ * Creates a [DestinationsNavigator] good for testing.
+ *
+ * @param testNavController should be `TestNavHostController` from navigation testing artifact
+ * @param isCurrentBackStackEntryResumed allows you to control behavior of `onlyIfResumed` parameter
+ * on navigate calls. By default, uses the real response from [testNavController]'s current nav back stack entry.
+ */
+@Suppress("FunctionName")
+fun TestDestinationsNavigator(
+    testNavController: NavController,
+    isCurrentBackStackEntryResumed: () -> Boolean = {
+        testNavController.currentBackStackEntry?.lifecycle?.currentState == Lifecycle.State.RESUMED
+    }
+): DestinationsNavigator = DestinationsNavController(
+    navController = testNavController,
+    isCurrentBackStackEntryResumed = isCurrentBackStackEntryResumed
+)