diff --git a/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/AppScope.kt b/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/AppScope.kt
index edbe561..0fa6fe2 100644
--- a/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/AppScope.kt
+++ b/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/AppScope.kt
@@ -4,7 +4,7 @@ package cn.vove7.andro_accessibility_api
  * # AppScope
  *
  * @property packageName String  app pkg
- * @property pageName String  class name of Activity or Dialog
+ * @property pageName String  class name of Activity or Dialog (empty means any page)
  * @constructor
  */
 data class AppScope(
@@ -22,4 +22,4 @@ data class AppScope(
                 that.pageName.endsWith("$$pageName")
 
     }
-}
\ No newline at end of file
+}
diff --git a/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/utils/ScreenAdapter.kt b/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/utils/ScreenAdapter.kt
index 1e31d78..1b0e7b8 100644
--- a/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/utils/ScreenAdapter.kt
+++ b/accessibility-api/src/main/java/cn/vove7/andro_accessibility_api/utils/ScreenAdapter.kt
@@ -52,18 +52,9 @@ object ScreenAdapter {
 
 
     fun scalePoints(points: Array<Pair<Int, Int>>): Array<Pair<Float, Float>> {
-
-        val ps = Array(points.size) { Pair(0f, 0f) }
-
-        val index = 0
-        points.forEach {
-            val x =
-                scaleX(it.first)
-            val y =
-                scaleY(it.second)
-            ps[index] = Pair(x, y)
-        }
-        return ps
+        return points.map { point ->
+            Pair(scaleX(point.first), scaleY(point.second))
+        }.toTypedArray()
     }
 
     fun scaleX(x: Int): Float = scaleX(x.toFloat())
@@ -106,4 +97,3 @@ class AdapterRectF : RectF {
         )
     }
 }
-
diff --git a/accessibility-api/src/test/java/cn/vove7/andro_accessibility_api/utils/ResultBoxTest.kt b/accessibility-api/src/test/java/cn/vove7/andro_accessibility_api/utils/ResultBoxTest.kt
new file mode 100644
index 0000000..f6d7090
--- /dev/null
+++ b/accessibility-api/src/test/java/cn/vove7/andro_accessibility_api/utils/ResultBoxTest.kt
@@ -0,0 +1,25 @@
+package cn.vove7.andro_accessibility_api.utils
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class ResultBoxTest {
+    @Test
+    fun setAndNotify_releasesLatchAndReturnsValue() {
+        val box = ResultBox<String>()
+
+        box.setAndNotify("done")
+
+        assertEquals(0, box.lock.count)
+        assertEquals("done", box.blockedGet())
+    }
+
+    @Test
+    fun blockedGet_returnsValueWithoutThrowingWhenAlreadySet() {
+        val box = ResultBox(42)
+
+        box.setAndNotify(7)
+
+        assertEquals(7, box.blockedGet(safely = false))
+    }
+}
diff --git a/app/src/main/java/cn/vove7/andro_accessibility_api/demo/actions/actoins.kt b/app/src/main/java/cn/vove7/andro_accessibility_api/demo/actions/actoins.kt
index c526d1c..31523ed 100644
--- a/app/src/main/java/cn/vove7/andro_accessibility_api/demo/actions/actoins.kt
+++ b/app/src/main/java/cn/vove7/andro_accessibility_api/demo/actions/actoins.kt
@@ -22,7 +22,7 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.withContext
 
 /**
- * # actoins
+ * # actions
  *
  * Created on 2020/6/10
  * @author Vove
@@ -271,4 +271,4 @@ class TraverseAllAction : Action {
         // assert = [ Bottom, SubView ]
 
     }
-}
\ No newline at end of file
+}