feat: add support for logCustomEvent command

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

@@ -68,7 +68,7 @@
 @SuppressWarnings("unchecked")
 public class AppiumDriver<T extends WebElement>
         extends DefaultGenericMobileDriver<T> implements ComparesImages, FindsByImage<T>, FindsByCustom<T>,
-        ExecutesDriverScript {
+        ExecutesDriverScript, LogsEvents {
 
     private static final ErrorHandler errorHandler = new ErrorHandler(new ErrorCodesMobile(), true);
     // frequently used command parameters

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

@@ -0,0 +1,80 @@
+/*
+ * 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 static io.appium.java_client.MobileCommand.GET_EVENTS;
+import static io.appium.java_client.MobileCommand.LOG_EVENT;
+
+import com.google.common.collect.ImmutableMap;
+import io.appium.java_client.serverevents.CommandEvent;
+import io.appium.java_client.serverevents.CustomEvent;
+import io.appium.java_client.serverevents.TimedEvent;
+import io.appium.java_client.serverevents.ServerEvents;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+import org.openqa.selenium.json.Json;
+import org.openqa.selenium.remote.Response;
+
+public interface LogsEvents extends ExecutesMethod {
+
+    /**
+     * Log a custom event on the Appium server.
+     *
+     * @since Appium 1.16
+     * @param event the event to log
+     * @throws org.openqa.selenium.WebDriverException if there was a failure while executing the script
+     */
+    default void logEvent(CustomEvent event) {
+        execute(LOG_EVENT, ImmutableMap.of("vendor", event.getVendor(), "event", event.getEventName()));
+    }
+
+    /**
+     * Log a custom event on the Appium server.
+     *
+     * @since Appium 1.16
+     * @return ServerEvents object wrapping up the various command and event timestamps
+     * @throws org.openqa.selenium.WebDriverException if there was a failure while executing the script
+     */
+    default ServerEvents getEvents() {
+        Response response = execute(GET_EVENTS);
+        String jsonData = new Json().toJson(response.getValue());
+
+        //noinspection unchecked
+        Map<String, Object> value = (Map<String, Object>) response.getValue();
+
+        //noinspection unchecked
+        List<CommandEvent> commands = ((List<Map<String, Object>>) value.get("commands"))
+            .stream()
+            .map((Map<String, Object> cmd) -> new CommandEvent(
+                (String) cmd.get("cmd"),
+                ((Long) cmd.get("startTime")),
+                ((Long) cmd.get("endTime"))
+            ))
+            .collect(Collectors.toList());
+
+        List<TimedEvent> events = value.keySet().stream()
+            .filter((String name) -> !name.equals("commands"))
+            .map((String name) -> {
+                //noinspection unchecked
+                return new TimedEvent(name, (List<Long>) value.get(name));
+            })
+            .collect(Collectors.toList());
+
+        return new ServerEvents(commands, events, jsonData);
+    }
+}

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

@@ -51,6 +51,8 @@ public class MobileCommand {
     protected static final String CLOSE_APP;
     protected static final String GET_DEVICE_TIME;
     protected static final String GET_SESSION;
+    protected static final String LOG_EVENT;
+    protected static final String GET_EVENTS;
 
     //region Applications Management
     protected static final String IS_APP_INSTALLED;
@@ -128,6 +130,8 @@ public class MobileCommand {
         CLOSE_APP = "closeApp";
         GET_DEVICE_TIME = "getDeviceTime";
         GET_SESSION = "getSession";
+        LOG_EVENT = "logCustomEvent";
+        GET_EVENTS = "getLogEvents";
 
         //region Applications Management
         IS_APP_INSTALLED = "isAppInstalled";
@@ -214,6 +218,10 @@ public class MobileCommand {
                 postC("/session/:sessionId/appium/start_recording_screen"));
         commandRepository.put(STOP_RECORDING_SCREEN,
                 postC("/session/:sessionId/appium/stop_recording_screen"));
+        commandRepository.put(GET_EVENTS,
+                postC("/session/:sessionId/appium/events"));
+        commandRepository.put(LOG_EVENT,
+                postC("/session/:sessionId/appium/log_event"));
 
         //region Applications Management
         commandRepository.put(IS_APP_INSTALLED, postC("/session/:sessionId/appium/device/app_installed"));

src/main/java/io/appium/java_client/serverevents/CommandEvent.java

@@ -0,0 +1,10 @@
+package io.appium.java_client.serverevents;
+
+import lombok.Data;
+
+@Data
+public class CommandEvent {
+    public final String name;
+    public final long startTimestamp;
+    public final long endTimestamp;
+}

src/main/java/io/appium/java_client/serverevents/CustomEvent.java

@@ -0,0 +1,9 @@
+package io.appium.java_client.serverevents;
+
+import lombok.Data;
+
+@Data
+public class CustomEvent {
+    private String vendor;
+    private String eventName;
+}

src/main/java/io/appium/java_client/serverevents/ServerEvents.java

@@ -0,0 +1,19 @@
+package io.appium.java_client.serverevents;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+import lombok.Data;
+
+@Data
+public class ServerEvents {
+
+    public final List<CommandEvent> commands;
+    public final List<TimedEvent> events;
+    public final String jsonData;
+
+    public void save(Path output) throws IOException  {
+        Files.write(output, this.jsonData.getBytes());
+    }
+}

src/main/java/io/appium/java_client/serverevents/TimedEvent.java

@@ -0,0 +1,10 @@
+package io.appium.java_client.serverevents;
+
+import java.util.List;
+import lombok.Data;
+
+@Data
+public class TimedEvent {
+    public final String name;
+    public final List<Long> occurrences;
+}

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

@@ -51,6 +51,7 @@ public class BaseAndroidTest {
         capabilities.setCapability(MobileCapabilityType.AUTOMATION_NAME, AutomationName.ANDROID_UIAUTOMATOR2);
         capabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "Android Emulator");
         capabilities.setCapability(MobileCapabilityType.APP, app.getAbsolutePath());
+        capabilities.setCapability("eventTimings", true);
         driver = new AndroidDriver<>(service.getUrl(), capabilities);
     }
 

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

@@ -0,0 +1,49 @@
+/*
+ * 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 static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import io.appium.java_client.serverevents.CommandEvent;
+import io.appium.java_client.serverevents.CustomEvent;
+import io.appium.java_client.serverevents.TimedEvent;
+import io.appium.java_client.serverevents.ServerEvents;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+public class LogEventTest extends BaseAndroidTest {
+
+    @Test
+    public void verifyLoggingCustomEvents() {
+        CustomEvent evt = new CustomEvent();
+        evt.setEventName("funEvent");
+        evt.setVendor("appium");
+        driver.logEvent(evt);
+        ServerEvents events = driver.getEvents();
+        boolean hasCustomEvent = events.events.stream().anyMatch((TimedEvent event) ->
+            event.name.equals("appium:funEvent") &&
+            event.occurrences.get(0).intValue() > 0
+        );
+        boolean hasCommandName = events.commands.stream().anyMatch((CommandEvent event) ->
+            event.name.equals("logCustomEvent")
+        );
+        assertTrue(hasCustomEvent);
+        assertTrue(hasCommandName);
+        assertThat(events.jsonData, Matchers.containsString("\"appium:funEvent\""));
+    }
+}