add more tests

tests/test_android.py

@@ -0,0 +1,39 @@
+from uiautodev.driver.android import parse_xml
+from uiautodev.model import WindowSize
+
+xml = """
+<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>
+<hierarchy rotation="0">
+  <node display-id="0" index="0" text="" resource-id="" class="android.widget.FrameLayout" hint="" bounds="[20,30][1020,2030]">
+    <node display-id="1" index="1" text="" resource-id="com.android.systemui:id/backdrop" hint="">
+      <node index="0" text="" resource-id="com.android.systemui:id/backdrop_back" hint="" />
+    </node>
+    <node display-id="0" NAF="true" index="2" text="" resource-id="com.android.systemui:id/scrim_behind" class="android.view.View" package="com.android.systemui" content-desc="" checkable="false" checked="false" clickable="true" enabled="true" focusable="true" focused="false" scrollable="false" long-clickable="false" password="false" selected="false" visible-to-user="true" bounds="[0,0][1080,2340]" drawing-order="2" hint="" />
+  </node>
+</hierarchy>
+"""
+
+def test_parse_xml():
+    node = parse_xml(xml.strip(), WindowSize(1000, 1000))
+    assert node.name == "hierarchy"
+    assert len(node.children) == 1
+    assert node.rect is None
+
+    childnode = node.children[0]
+    assert childnode.name == "android.widget.FrameLayout"
+    assert len(childnode.children) == 2
+    assert childnode.rect is not None
+    assert childnode.rect.x == 20
+    assert childnode.rect.y == 30
+    assert childnode.rect.width == 1000
+    assert childnode.rect.height == 2000
+
+
+def test_parse_xml_display_id():
+    node = parse_xml(xml.strip(), WindowSize(1000, 1000), display_id=0)
+    assert node.name == "hierarchy"
+    assert len(node.children) == 1
+
+    childnode = node.children[0]
+    assert childnode.name == "android.widget.FrameLayout"
+    assert len(childnode.children) == 1

uiautodev/driver/android.py

@@ -146,24 +146,25 @@ def wake_up(self):
         self.adb_device.keyevent("WAKEUP")
 
 
-def parse_xml(xml_data: str, wsize: WindowSize, display_id: int) -> Node:
+def parse_xml(xml_data: str, wsize: WindowSize, display_id: Optional[int] = None) -> Node:
     root = ElementTree.fromstring(xml_data)
     node = parse_xml_element(root, wsize, display_id)
     if node is None:
         raise AndroidDriverException("Failed to parse xml")
     return node
 
 
-def parse_xml_element(element, wsize: WindowSize, display_id: int, indexes: List[int] = [0]) -> Optional[Node]:
+def parse_xml_element(element, wsize: WindowSize, display_id: Optional[int], indexes: List[int] = [0]) -> Optional[Node]:
     """
     Recursively parse an XML element into a dictionary format.
     """
     name = element.tag
     if name == "node":
         name = element.attrib.get("class", "node")
-    curr_display_id = int(element.attrib.get("display-id", display_id))
-    if curr_display_id != display_id:
-        return
+    if display_id is not None:
+        elem_display_id = int(element.attrib.get("display-id", display_id))
+        if elem_display_id != display_id:
+            return
 
     bounds = None
     rect = None