Add unit tests

Author: Mykola Mokhnach

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

@@ -0,0 +1,39 @@
+package io.appium.java_client.android;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.openqa.selenium.WebDriverException;
+
+import java.time.Duration;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.isEmptyString;
+import static org.hamcrest.Matchers.not;
+
+public class AndroidScreenRecordTest extends BaseAndroidTest {
+
+    @Before
+    public void setUp() {
+        Activity activity = new Activity("io.appium.android.apis", ".ApiDemos");
+        driver.startActivity(activity);
+    }
+
+    @Test
+    public void verifyBasicScreenRecordingWorks() throws InterruptedException {
+        try {
+            driver.startRecordingScreen(
+                    new AndroidStartScreenRecordingOptions()
+                            .withTimeLimit(Duration.ofSeconds(5))
+            );
+        } catch (WebDriverException e) {
+            if (e.getMessage().toLowerCase().contains("emulator")) {
+                // screen recording only works on real devices
+                return;
+            }
+        }
+        Thread.sleep(5000);
+        String result = driver.stopRecordingScreen();
+        assertThat(result, not(isEmptyString()));
+    }
+
+}

src/test/java/io/appium/java_client/ios/IOSScreenRecordTest.java

@@ -0,0 +1,24 @@
+package io.appium.java_client.ios;
+
+import org.junit.Test;
+
+import java.time.Duration;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.isEmptyString;
+import static org.hamcrest.Matchers.not;
+
+public class IOSScreenRecordTest extends AppIOSTest {
+
+    @Test
+    public void verifyBasicScreenRecordingWorks() throws InterruptedException {
+        driver.startRecordingScreen(
+                new IOSStartScreenRecordingOptions()
+                        .withTimeLimit(Duration.ofSeconds(10))
+        );
+        Thread.sleep(5000);
+        String result = driver.stopRecordingScreen();
+        assertThat(result, not(isEmptyString()));
+    }
+
+}