Merge pull request #13 from sshah112/Add-isInitialized-to-PermissionP…

…rovider

add isInitialized() to PermissionProvider

lib/src/main/java/dev/marcelpinto/permissionktx/PermissionProvider.kt

@@ -48,6 +48,17 @@ class PermissionProvider @OptIn(ExperimentalCoroutinesApi::class) constructor(
         lateinit var instance: PermissionProvider
             private set
 
+        /**
+         * When PermissionProvider self-initialization is disabled, PermissionProvider.init(context)
+         * must be called to manually initialize the PermissionProvider instance. Depending on
+         * implementation if init() is called more than once (multiple times in app OR in app + test),
+         * an IllegalStateException is thrown.
+         *
+         * Provide an easy way to check if PermissionProvider instance is already
+         * initialized, before calling PermissionProvider.init(context).
+         */
+        fun isInitialized() = ::instance.isInitialized
+
         /**
          * Initialize the PermissionProvider instance and wire the components to check and observe
          * PermissionProvider status changes.

lib/src/test/java/dev/marcelpinto/permissionktx/PermissionProviderTest.kt

@@ -0,0 +1,25 @@
+package dev.marcelpinto.permissionktx
+
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.flow.emptyFlow
+import org.junit.Test
+
+class PermissionProviderTest {
+
+
+    private val fakeChecker = object : PermissionChecker {
+        override fun getStatus(type: Permission) = PermissionStatus.Granted(Permission("any"))
+    }
+
+    private val dummyObserver = object : PermissionObserver {
+        override fun getStatusFlow(type: Permission) = emptyFlow<PermissionStatus>()
+        override fun refreshStatus() {}
+    }
+
+    @Test
+    fun `test isInitialized when PermissionProvider is initialized`() {
+        assertThat(PermissionProvider.isInitialized()).isFalse()
+        PermissionProvider.init(fakeChecker, dummyObserver)
+        assertThat(PermissionProvider.isInitialized()).isTrue()
+    }
+}