feat: Add viewmatcher

appium/webdriver/common/mobileby.py

@@ -22,6 +22,7 @@ class MobileBy(By):
     ANDROID_UIAUTOMATOR = '-android uiautomator'
     ANDROID_VIEWTAG = '-android viewtag'
     ANDROID_DATA_MATCHER = '-android datamatcher'
+    ANDROID_VIEW_MATCHER = '-android viewmatcher'
     WINDOWS_UI_AUTOMATION = '-windows uiautomation'
     ACCESSIBILITY_ID = 'accessibility id'
     IMAGE = '-image'

appium/webdriver/extensions/search_context/android.py

@@ -24,6 +24,39 @@
 class AndroidSearchContext(BaseSearchContext):
     """Define search context for Android"""
 
+    def find_element_by_android_view_matcher(self, name=None, args=None, className=None):
+        """Finds element by [onView](https://developer.android.com/training/testing/espresso/basics) in Android
+
+        It works with [Espresso Driver](https://github.com/appium/appium-espresso-driver).
+
+        Args:
+            name (:obj:`str`, optional): The name of a method to invoke.
+                The method must return a Hamcrest
+                [Matcher](http://hamcrest.org/JavaHamcrest/javadoc/1.3/org/hamcrest/Matcher.html)
+            args (:obj:`str`, optional): The args provided to the method
+            className (:obj:`str`, optional): The class name that the method is part of (defaults to `org.hamcrest.Matchers`).
+                Can be fully qualified by having the androidx.test.espresso.matcher. prefix.
+                If the prefix is not provided then it is going to be added implicitly.
+                (e.g.: `class=CursorMatchers` fully qualified is `class=androidx.test.espresso.matcher.CursorMatchers`
+
+        Returns:
+            `appium.webdriver.webelement.WebElement`: The found element
+
+        Raises:
+            TypeError - Raises a TypeError if the arguments are not validated for JSON format
+
+        Usage:
+            driver.find_element_by_android_view_matcher(name='withText', args=['Accessibility'], className='ViewMatchers')
+
+        # To enable auto completion in PyCharm(IDE)
+        :rtype: `appium.webdriver.webelement.WebElement`
+        """
+
+        return self.find_element(
+            by=MobileBy.ANDROID_VIEW_MATCHER,
+            value=self._build_data_matcher(name=name, args=args, className=className)
+        )
+
     def find_element_by_android_data_matcher(self, name=None, args=None, className=None):
         """Finds element by [onData](https://medium.com/androiddevelopers/adapterviews-and-espresso-f4172aa853cf) in Android
 
@@ -58,6 +91,7 @@ def find_element_by_android_data_matcher(self, name=None, args=None, className=N
 
     def find_elements_by_android_data_matcher(self, name=None, args=None, className=None):
         """Finds elements by [onData](https://medium.com/androiddevelopers/adapterviews-and-espresso-f4172aa853cf) in Android
+
         It works with [Espresso Driver](https://github.com/appium/appium-espresso-driver).
 
         Args:

test/functional/android/search_context/find_by_view_matcher_tests.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import unittest
+
+import pytest
+from selenium.common.exceptions import WebDriverException
+
+from appium import webdriver
+from appium.webdriver.common.mobileby import MobileBy
+from appium.webdriver.extensions.search_context.android import (
+    AndroidSearchContext
+)
+from test.functional.android.helper.test_helper import (
+    desired_capabilities,
+    is_ci
+)
+
+
+class FindByViewMatcherTests(unittest.TestCase):
+
+    def setUp(self):
+        desired_caps = desired_capabilities.get_desired_capabilities('ApiDemos-debug.apk.zip')
+        desired_caps['automationName'] = 'Espresso'
+        self.driver = webdriver.Remote('http://localhost:4723/wd/hub', desired_caps)
+
+    def tearDown(self):
+        if is_ci():
+            # Take the screenshot to investigate when tests failed only on CI
+            img_path = os.path.join(os.getcwd(), self._testMethodName + '.png')
+            self.driver.get_screenshot_as_file(img_path)
+        self.driver.quit()
+
+    def test_find_single_element(self):
+        el = self.driver.find_element_by_android_view_matcher(
+            name='withText', args=['Accessibility'], className='ViewMatchers')
+        assert el.text == 'Accessibility'
+
+    def test_find_single_element_ful_class_name(self):
+        el = self.driver.find_element_by_android_view_matcher(
+            name='withText', args=['Accessibility'], className='androidx.test.espresso.matcher.ViewMatchers')
+        assert el.text == 'Accessibility'
+
+    def test_find_single_element_using_hamcrest_matcher(self):
+        el = self.driver.find_element_by_android_view_matcher(
+            name='withText',
+            args={
+                'name': 'containsString',
+                'args': 'Animati',
+                'class': 'org.hamcrest.Matchers'},
+            className='ViewMatchers')
+        assert el.text == 'Animation'
+
+    # androidx.test.espresso.AmbiguousViewMatcherException:
+    # 'with text: a string containing "Access"' matches multiple views in the hierarchy.
+    def test_find_multiple_elements(self):
+        value = AndroidSearchContext()._build_data_matcher(
+            name='withSubstring', args=['Access'], className='ViewMatchers')
+        with pytest.raises(WebDriverException):
+            self.driver.find_elements(by=MobileBy.ANDROID_VIEW_MATCHER, value=value)
+
+
+if __name__ == '__main__':
+    suite = unittest.TestLoader().loadTestsFromTestCase(FindByViewMatcherTests)
+    unittest.TextTestRunner(verbosity=2).run(suite)