这是啥问题啊 ，步骤好像有点不明白。
org.testng.TestNGException:
Cannot instantiate class com.AppiumTestTHEARD.NewTest
at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:40)
at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:363)
at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:275)
at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:126)
at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:191)
at org.testng.TestClass.getInstances(TestClass.java:100)
at org.testng.TestClass.initTestClassesAndInstances(TestClass.java:86)
at org.testng.TestClass.init(TestClass.java:78)
at org.testng.TestClass.(TestClass.java:41)
at org.testng.TestRunner.initMethods(TestRunner.java:425)
at org.testng.TestRunner.init(TestRunner.java:252)
at org.testng.TestRunner.init(TestRunner.java:222)
at org.testng.TestRunner.(TestRunner.java:171)
at org.testng.remote.support.RemoteTestNG6_10$1.newTestRunner(RemoteTestNG6_10.java:28)
at org.testng.remote.support.RemoteTestNG6_10$DelegatingTestRunnerFactory.newTestRunner(RemoteTestNG6_10.java:61)
at org.testng.SuiteRunner$ProxyTestRunnerFactory.newTestRunner(SuiteRunner.java:623)
at org.testng.SuiteRunner.init(SuiteRunner.java:189)
at org.testng.SuiteRunner.(SuiteRunner.java:136)
at org.testng.TestNG.createSuiteRunner(TestNG.java:1375)
at org.testng.TestNG.createSuiteRunners(TestNG.java:1355)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1209)
at org.testng.TestNG.runSuites(TestNG.java:1133)
at org.testng.TestNG.run(TestNG.java:1104)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:29)
... 25 more
Caused by: java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787)
at org.openqa.selenium.support.ui.FluentWait.(FluentWait.java:96)
at org.openqa.selenium.support.ui.WebDriverWait.(WebDriverWait.java:72)
at org.openqa.selenium.support.ui.WebDriverWait.(WebDriverWait.java:46)
at com.AppiumTestTHEARD.NewTest.(NewTest.java:28)
... 30 more