[java] Fixing null pointer exception in RemoteWebDriver instantiated …

…by no-arg constructor.

When driver object created using default constructor, capabilities is null, results in null pointer exception in executeScript().

Signed-off-by: Alexei Barantsev <barancev@gmail.com>

java/client/src/org/openqa/selenium/remote/RemoteWebDriver.java

@@ -112,7 +112,7 @@ public class RemoteWebDriver implements WebDriver, JavascriptExecutor, HasInputD
 
   // For cglib
   protected RemoteWebDriver() {
-    init(new ImmutableCapabilities());
+    this.capabilities=init(new ImmutableCapabilities());
   }
 
   public RemoteWebDriver(Capabilities capabilities) {
@@ -129,7 +129,7 @@ public RemoteWebDriver(CommandExecutor executor, Capabilities capabilities) {
     }
     this.executor = executor;
 
-    init(capabilities);
+    capabilities=init(capabilities);
 
     if (executor instanceof NeedsLocalLogs) {
       ((NeedsLocalLogs) executor).setLocalLogs(localLogs);
@@ -153,7 +153,7 @@ public static RemoteWebDriverBuilder builder() {
     return new RemoteWebDriverBuilder();
   }
 
-  private void init(Capabilities capabilities) {
+  private Capabilities init(Capabilities capabilities) {
     capabilities = capabilities == null ? new ImmutableCapabilities() : capabilities;
 
     logger.addHandler(LoggingHandler.getInstance());
@@ -185,6 +185,8 @@ private void init(Capabilities capabilities) {
       LoggingHandler.getInstance(), logTypesToInclude);
     localLogs = LocalLogs.getCombinedLogsHolder(clientLogs, performanceLogger);
     remoteLogs = new RemoteLogs(executeMethod, localLogs);
+
+    return capabilities;
   }
 
   /**
@@ -286,6 +288,9 @@ protected void setCommandExecutor(CommandExecutor executor) {
 
   @Override
   public Capabilities getCapabilities() {
+    if(capabilities == null){
+      return new ImmutableCapabilities();
+    }
     return capabilities;
   }
 
@@ -480,7 +485,7 @@ public Object executeAsyncScript(String script, Object... args) {
   }
 
   private boolean isJavascriptEnabled() {
-    return capabilities.is(SUPPORTS_JAVASCRIPT);
+    return getCapabilities().is(SUPPORTS_JAVASCRIPT);
   }
 
   @Override

java/client/test/org/openqa/selenium/remote/RemoteWebDriverUnitTest.java

@@ -785,4 +785,10 @@ public void canHandleResponseWithErrorCodeButNoExceptionReturnedByCommandExecuto
     fixture.verifyCommands(
       new CommandPayload(DriverCommand.GET_CURRENT_URL, emptyMap()));
   }
+
+  @Test
+  public void noArgConstuctorEmptyCapabilitiesTest() {
+    RemoteWebDriver driver = new RemoteWebDriver() {}; // anonymous subclass
+    assertThat(driver.getCapabilities()).isEqualTo(new ImmutableCapabilities());
+  }
 }