Feat: Add support for viewmatcher

src/main/java/io/appium/java_client/FindsByAndroidViewMatcher.java

@@ -0,0 +1,32 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ * 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.
+ */
+
+package io.appium.java_client;
+
+import org.openqa.selenium.WebElement;
+
+import java.util.List;
+
+public interface FindsByAndroidViewMatcher<T extends WebElement> extends FindsByFluentSelector<T> {
+
+    default T findElementByAndroidViewMatcher(String using) {
+        return findElement(MobileSelector.ANDROID_VIEW_MATCHER.toString(), using);
+    }
+
+    default List<T> findElementsByAndroidViewMatcher(String using) {
+        return findElements(MobileSelector.ANDROID_VIEW_MATCHER.toString(), using);
+    }
+}

src/main/java/io/appium/java_client/MobileBy.java

@@ -97,15 +97,26 @@ public static By iOSClassChain(final String iOSClassChainString) {
 
     /**
      * This locator strategy is only available in Espresso Driver mode.
-     * @param dataMatcherString is a valid class chain locator string.
-     *                            See <a href="https://github.com/appium/appium-espresso-driver/pull/386">
+     * @param dataMatcherString is a valid json string detailing hamcrest matcher for Espresso onData().
+     *                            See <a href="http://appium.io/docs/en/writing-running-appium/android/espresso-datamatcher-selector/">
      *                            the documentation</a> for more details
      * @return an instance of {@link io.appium.java_client.MobileBy.ByAndroidDataMatcher}
      */
     public static By androidDataMatcher(final String dataMatcherString) {
         return new ByAndroidDataMatcher(dataMatcherString);
     }
 
+    /**
+     * This locator strategy is only available in Espresso Driver mode.
+     * @param viewMatcherString is a valid json string detailing hamcrest matcher for Espresso onView().
+     *                            See <a href="http://appium.io/docs/en/writing-running-appium/android/espresso-datamatcher-selector/">
+     *                            the documentation</a> for more details
+     * @return an instance of {@link io.appium.java_client.MobileBy.ByAndroidViewMatcher}
+     */
+    public static By androidViewMatcher(final String viewMatcherString) {
+        return new ByAndroidViewMatcher(viewMatcherString);
+    }
+
     /**
     * This locator strategy is available in XCUITest Driver mode.
     * @param iOSNsPredicateString is an an iOS NsPredicate String
@@ -407,6 +418,66 @@ protected ByAndroidDataMatcher(String locatorString) {
         }
     }
 
+    public static class ByAndroidViewMatcher extends MobileBy implements Serializable {
+
+        protected ByAndroidViewMatcher(String locatorString) {
+            super(MobileSelector.ANDROID_VIEW_MATCHER, locatorString);
+        }
+
+        /**
+         * {@inheritDoc}
+         *
+         * @throws WebDriverException when current session doesn't support the given selector or when
+         *      value of the selector is not consistent.
+         * @throws IllegalArgumentException when it is impossible to find something on the given
+         * {@link SearchContext} instance
+         */
+        @SuppressWarnings("unchecked")
+        @Override public List<WebElement> findElements(SearchContext context) {
+            Class<?> contextClass = context.getClass();
+
+            if (FindsByAndroidViewMatcher.class.isAssignableFrom(contextClass)) {
+                return FindsByAndroidViewMatcher.class.cast(context)
+                    .findElementsByAndroidViewMatcher(getLocatorString());
+            }
+
+            if (FindsByFluentSelector.class.isAssignableFrom(contextClass)) {
+                return super.findElements(context);
+            }
+
+            throw formIllegalArgumentException(contextClass, FindsByAndroidViewMatcher.class,
+                FindsByFluentSelector.class);
+        }
+
+        /**
+         * {@inheritDoc}
+         *
+         * @throws WebDriverException when current session doesn't support the given selector or when
+         *      value of the selector is not consistent.
+         * @throws IllegalArgumentException when it is impossible to find something on the given
+         * {@link SearchContext} instance
+         */
+        @Override public WebElement findElement(SearchContext context) {
+            Class<?> contextClass = context.getClass();
+
+            if (FindsByAndroidViewMatcher.class.isAssignableFrom(contextClass)) {
+                return FindsByAndroidViewMatcher.class.cast(context)
+                    .findElementByAndroidViewMatcher(getLocatorString());
+            }
+
+            if (FindsByFluentSelector.class.isAssignableFrom(contextClass)) {
+                return super.findElement(context);
+            }
+
+            throw formIllegalArgumentException(contextClass, FindsByAndroidViewMatcher.class,
+                FindsByFluentSelector.class);
+        }
+
+        @Override public String toString() {
+            return "By.FindsByAndroidViewMatcher: " + getLocatorString();
+        }
+    }
+
     public static class ByIosNsPredicate extends MobileBy implements Serializable {
 
         protected ByIosNsPredicate(String locatorString) {

src/main/java/io/appium/java_client/MobileSelector.java

@@ -26,6 +26,7 @@ public enum MobileSelector {
     IMAGE("-image"),
     ANDROID_VIEWTAG("-android viewtag"),
     ANDROID_DATA_MATCHER("-android datamatcher"),
+    ANDROID_VIEW_MATCHER("-android viewmatcher"),
     CUSTOM("-custom");
 
     private final String selector;

src/main/java/io/appium/java_client/android/AndroidDriver.java

@@ -26,6 +26,7 @@
 import io.appium.java_client.AppiumDriver;
 import io.appium.java_client.CommandExecutionHelper;
 import io.appium.java_client.FindsByAndroidDataMatcher;
+import io.appium.java_client.FindsByAndroidViewMatcher;
 import io.appium.java_client.FindsByAndroidUIAutomator;
 import io.appium.java_client.FindsByAndroidViewTag;
 import io.appium.java_client.HasOnScreenKeyboard;
@@ -62,7 +63,7 @@ public class AndroidDriver<T extends WebElement>
     extends AppiumDriver<T>
     implements PressesKey, HasNetworkConnection, PushesFiles, StartsActivity,
         FindsByAndroidUIAutomator<T>, FindsByAndroidViewTag<T>, FindsByAndroidDataMatcher<T>,
-        LocksDevice, HasAndroidSettings, HasAndroidDeviceDetails,
+        FindsByAndroidViewMatcher<T>, LocksDevice, HasAndroidSettings, HasAndroidDeviceDetails,
         HasSupportedPerformanceDataType, AuthenticatesByFinger, HasOnScreenKeyboard,
         CanRecordScreen, SupportsSpecialEmulatorCommands,
         SupportsNetworkStateManagement, ListensToLogcatMessages, HasAndroidClipboard,

src/main/java/io/appium/java_client/android/AndroidElement.java

@@ -20,13 +20,14 @@
 
 import io.appium.java_client.CommandExecutionHelper;
 import io.appium.java_client.FindsByAndroidDataMatcher;
+import io.appium.java_client.FindsByAndroidViewMatcher;
 import io.appium.java_client.FindsByAndroidUIAutomator;
 import io.appium.java_client.FindsByAndroidViewTag;
 import io.appium.java_client.MobileElement;
 
 public class AndroidElement extends MobileElement
     implements FindsByAndroidUIAutomator<MobileElement>, FindsByAndroidDataMatcher<MobileElement>,
-        FindsByAndroidViewTag<MobileElement> {
+        FindsByAndroidViewMatcher<MobileElement>, FindsByAndroidViewTag<MobileElement> {
     /**
      * This method replace current text value.
      * @param value a new value

src/main/java/io/appium/java_client/events/DefaultAspect.java

@@ -99,6 +99,8 @@ class DefaultAspect {
         + "execution(* org.openqa.selenium.ContextAware.*(..)) || "
         + "execution(* io.appium.java_client.FindsByAccessibilityId.*(..)) || "
         + "execution(* io.appium.java_client.FindsByAndroidUIAutomator.*(..)) || "
+        + "execution(* io.appium.java_client.FindsByAndroidDataMatcher.*(..)) || "
+        + "execution(* io.appium.java_client.FindsByAndroidViewMatcher.*(..)) || "
         + "execution(* io.appium.java_client.FindsByWindowsAutomation.*(..)) || "
         + "execution(* io.appium.java_client.FindsByIosNSPredicate.*(..)) || "
         + "execution(* org.openqa.selenium.internal.FindsByClassName.*(..)) || "

src/main/java/io/appium/java_client/pagefactory/AndroidFindBy.java

@@ -81,6 +81,13 @@
      */
     String androidDataMatcher() default "";
 
+    /**
+     * It is a desired view matcher expression.
+     *
+     * @return a desired view matcher expression
+     */
+    String androidViewMatcher() default "";
+
     /**
      * It is a xpath to the target element.
      *

src/main/java/io/appium/java_client/pagefactory/bys/builder/Strategies.java

@@ -102,6 +102,12 @@ enum Strategies {
                     .androidDataMatcher(getValue(annotation, this));
         }
     },
+    BY_VIEW_MATCHER("androidViewMatcher") {
+        @Override By getBy(Annotation annotation) {
+            return MobileBy
+                .androidViewMatcher(getValue(annotation, this));
+        }
+    },
     BY_NS_PREDICATE("iOSNsPredicate") {
         @Override By getBy(Annotation annotation) {
             return MobileBy

src/test/java/io/appium/java_client/android/AndroidDataMatcherTest.java

@@ -0,0 +1,46 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ * 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.
+ */
+
+package io.appium.java_client.android;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import io.appium.java_client.MobileBy;
+import org.junit.Test;
+import org.openqa.selenium.json.Json;
+import org.openqa.selenium.support.ui.ExpectedConditions;
+import org.openqa.selenium.support.ui.WebDriverWait;
+
+import static org.junit.Assert.assertNotNull;
+
+public class AndroidDataMatcherTest extends BaseEspressoTest {
+
+    @Test
+    public void testFindByDataMatcher() {
+        final WebDriverWait wait = new WebDriverWait(driver, 10);
+        wait.until(ExpectedConditions
+            .elementToBeClickable(MobileBy.AccessibilityId("Graphics")));
+        driver.findElement(MobileBy.AccessibilityId("Graphics")).click();
+
+        String selector = new Json().toJson(ImmutableMap.of(
+            "name", "hasEntry",
+            "args", ImmutableList.of("title", "Sweep")
+        ));
+
+        assertNotNull(wait.until(ExpectedConditions
+            .presenceOfElementLocated(MobileBy.androidDataMatcher(selector))));
+    }
+}

src/test/java/io/appium/java_client/android/AndroidViewMatcherTest.java

@@ -0,0 +1,42 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ * 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.
+ */
+
+package io.appium.java_client.android;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import io.appium.java_client.MobileBy;
+import org.junit.Test;
+import org.openqa.selenium.json.Json;
+import org.openqa.selenium.support.ui.ExpectedConditions;
+import org.openqa.selenium.support.ui.WebDriverWait;
+
+import static org.junit.Assert.assertNotNull;
+
+public class AndroidViewMatcherTest extends BaseEspressoTest {
+
+    @Test
+    public void testFindByViewMatcher() {
+        String selector = new Json().toJson(ImmutableMap.of(
+            "name", "withText",
+            "args", ImmutableList.of("Animation"),
+            "class", "androidx.test.espresso.matcher.ViewMatchers"
+        ));
+        final WebDriverWait wait = new WebDriverWait(driver, 10);
+        assertNotNull(wait.until(ExpectedConditions
+            .presenceOfElementLocated(MobileBy.androidViewMatcher(selector))));
+    }
+}

src/test/java/io/appium/java_client/android/BaseEspressoTest.java

@@ -0,0 +1,67 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * See the NOTICE file distributed with this work for additional
+ * information regarding copyright ownership.
+ * 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.
+ */
+
+package io.appium.java_client.android;
+
+import io.appium.java_client.remote.AutomationName;
+import io.appium.java_client.remote.MobileCapabilityType;
+import io.appium.java_client.service.local.AppiumDriverLocalService;
+import io.appium.java_client.service.local.AppiumServerHasNotBeenStartedLocallyException;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.openqa.selenium.remote.DesiredCapabilities;
+
+import java.io.File;
+
+public class BaseEspressoTest {
+
+    private static AppiumDriverLocalService service;
+    protected static AndroidDriver<AndroidElement> driver;
+
+    /**
+     * initialization.
+     */
+    @BeforeClass public static void beforeClass() {
+        service = AppiumDriverLocalService.buildDefaultService();
+        service.start();
+
+        if (service == null || !service.isRunning()) {
+            throw new AppiumServerHasNotBeenStartedLocallyException(
+                "An appium server node is not started!");
+        }
+
+        File appDir = new File("src/test/java/io/appium/java_client");
+        File app = new File(appDir, "ApiDemos-debug.apk");
+        DesiredCapabilities capabilities = new DesiredCapabilities();
+        capabilities.setCapability(MobileCapabilityType.AUTOMATION_NAME, AutomationName.ESPRESSO);
+        capabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "Android Emulator");
+        capabilities.setCapability(MobileCapabilityType.APP, app.getAbsolutePath());
+        capabilities.setCapability("eventTimings", true);
+        driver = new AndroidDriver<>(service.getUrl(), capabilities);
+    }
+
+    /**
+     * finishing.
+     */
+    @AfterClass public static void afterClass() {
+        if (driver != null) {
+            driver.quit();
+        }
+        if (service != null) {
+            service.stop();
+        }
+    }
+}