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How to use ThrowableUtil class of com.tngtech.jgiven.impl.util package

Best JGiven code snippet using com.tngtech.jgiven.impl.util.ThrowableUtil

Source:StepInterceptorImpl.java

...5import java.lang.reflect.Method;6import java.util.Arrays;7import java.util.List;8import java.util.Stack;9import com.tngtech.jgiven.impl.util.ThrowableUtil;10import org.slf4j.Logger;11import org.slf4j.LoggerFactory;12import com.tngtech.jgiven.annotation.DoNotIntercept;13import com.tngtech.jgiven.annotation.Hidden;14import com.tngtech.jgiven.annotation.NestedSteps;15import com.tngtech.jgiven.annotation.Pending;16import com.tngtech.jgiven.impl.ScenarioExecutor;17import com.tngtech.jgiven.impl.util.ParameterNameUtil;18import com.tngtech.jgiven.report.model.InvocationMode;19import com.tngtech.jgiven.report.model.NamedArgument;20public class StepInterceptorImpl implements StepInterceptor {21    private static final Logger log = LoggerFactory.getLogger( StepInterceptorImpl.class );22    private static final int INITIAL_MAX_STEP_DEPTH = 1;23    private ScenarioExecutor scenarioExecutor;24    private StageTransitionHandler stageTransitionHandler;25    private ScenarioListener listener;26    /**27     * Contains the stack of call receivers. This is used to update28     * the state of a parent stage after a call to a child stage has returned29     */30    protected final Stack<Object> stageStack = new Stack<Object>();31    private int maxStepDepth = INITIAL_MAX_STEP_DEPTH;32    private InvocationMode defaultInvocationMode = InvocationMode.NORMAL;33    /**34     * Whether methods should be intercepted or not35     */36    private boolean interceptingEnabled;37    /**38     * Whether step methods are actually executed or just skipped39     */40    private boolean methodExecutionEnabled = true;41    /**42     * Whether all exceptions should be suppressed and not be rethrown43     */44    private boolean suppressExceptions = true;45    public StepInterceptorImpl(ScenarioExecutor scenarioExecutor, ScenarioListener listener, StageTransitionHandler stageTransitionHandler) {46        this.scenarioExecutor = scenarioExecutor;47        this.listener = listener;48        this.stageTransitionHandler = stageTransitionHandler;49    }50    public final Object intercept( final Object receiver, Method method, final Object[] parameters, Invoker invoker ) throws Throwable {51        if( !shouldInterceptMethod( method ) ) {52            return invoker.proceed();53        }54        int currentStackDepth = stageStack.size();55        Object parentStage = null;56        if( !stageStack.isEmpty() ) {57            parentStage = stageStack.peek();58        }59        stageStack.push( receiver );60        try {61            stageTransitionHandler.enterStage( parentStage, receiver );62            return doIntercept( receiver, method, parameters, invoker, currentStackDepth );63        } finally {64            stageStack.pop();65            stageTransitionHandler.leaveStage( parentStage, receiver );66        }67    }68    private Object doIntercept(Object receiver, Method method, Object[] parameters, Invoker invoker, int currentStackDepth )69            throws Throwable {70        long started = System.nanoTime();71        InvocationMode mode = getInvocationMode( receiver, method );72        boolean hasNestedSteps = method.isAnnotationPresent( NestedSteps.class );73        boolean handleMethod = shouldHandleMethod( method );74        if( handleMethod ) {75            handleMethod( receiver, method, parameters, mode, hasNestedSteps );76        }77        if( mode == SKIPPED || mode == PENDING ) {78            return returnReceiverOrNull( receiver, method );79        }80        if( hasNestedSteps ) {81            maxStepDepth++;82        }83        try {84            return invoker.proceed();85        } catch( Exception e ) {86            return handleThrowable( receiver, method, e, System.nanoTime() - started, handleMethod );87        } catch( AssertionError e ) {88            return handleThrowable( receiver, method, e, System.nanoTime() - started, handleMethod );89        } finally {90            if( hasNestedSteps ) {91                maxStepDepth--;92            }93            if( handleMethod ) {94                handleMethodFinished( System.nanoTime() - started, hasNestedSteps );95            }96        }97    }98    private boolean shouldHandleMethod( Method method ) {99        if( method.isSynthetic() && !method.isBridge() ) {100            return false;101        }102        if( method.isAnnotationPresent( Hidden.class ) ) {103            return false;104        }105        if( stageStack.size() > maxStepDepth ) {106            return false;107        }108        return true;109    }110    private boolean shouldInterceptMethod( Method method ) {111        return interceptingEnabled112                && method.getDeclaringClass() != Object.class113                && !method.isAnnotationPresent(DoNotIntercept.class);114    }115    protected Object handleThrowable( Object receiver, Method method, Throwable t, long durationInNanos, boolean handleMethod )116            throws Throwable {117        if( handleMethod ) {118            handleThrowable( t );119            return returnReceiverOrNull( receiver, method );120        }121        throw t;122    }123    protected Object returnReceiverOrNull( Object receiver, Method method ) {124        // we assume here that the implementation follows the fluent interface125        // convention and returns the receiver object. If not, we fall back to null126        // and hope for the best.127        if( !method.getReturnType().isAssignableFrom( receiver.getClass() ) ) {128            if( method.getReturnType() != Void.class ) {129                log.warn( "The step method " + method.getName()130                        + " of class " + method.getDeclaringClass().getSimpleName()131                        + " does not follow the fluent interface convention of returning "132                        + "the receiver object. Please change the return type to the SELF type parameter." );133            }134            return null;135        }136        return receiver;137    }138    protected InvocationMode getInvocationMode( Object receiver, Method method ) {139        if( !methodExecutionEnabled ) {140            return SKIPPED;141        }142        if( method.isAnnotationPresent( Pending.class )143            || method.getDeclaringClass().isAnnotationPresent( Pending.class )144            || receiver.getClass().isAnnotationPresent( Pending.class ) ) {145            return PENDING;146        }147        return defaultInvocationMode;148    }149    public void enableMethodInterception(boolean b ) {150        interceptingEnabled = b;151    }152    public void disableMethodExecution() {153        methodExecutionEnabled = false;154    }155    public boolean enableMethodExecution( boolean b ) {156        boolean previousMethodExecution = methodExecutionEnabled;157        methodExecutionEnabled = b;158        return previousMethodExecution;159    }160    public void setSuppressExceptions(boolean b) {161        suppressExceptions = b;162    }163    public void setDefaultInvocationMode(InvocationMode defaultInvocationMode) {164        this.defaultInvocationMode = defaultInvocationMode;165    }166    private void handleMethod(Object stageInstance, Method paramMethod, Object[] arguments, InvocationMode mode,167                              boolean hasNestedSteps ) throws Throwable {168        List<NamedArgument> namedArguments = ParameterNameUtil.mapArgumentsWithParameterNames( paramMethod,169                Arrays.asList( arguments ) );170        listener.stepMethodInvoked( paramMethod, namedArguments, mode, hasNestedSteps );171    }172    private void handleThrowable( Throwable t ) throws Throwable {173        if( ThrowableUtil.isAssumptionException(t) ) {174            throw t;175        }176        listener.stepMethodFailed( t );177        scenarioExecutor.failed( t );178        if (!suppressExceptions) {179            throw t;180        }181    }182    private void handleMethodFinished( long durationInNanos, boolean hasNestedSteps ) {183        listener.stepMethodFinished( durationInNanos, hasNestedSteps );184    }185    public void setScenarioListener(ScenarioListener scenarioListener) {186        this.listener = scenarioListener;187    }...

Source:ThrowableUtil.java

1package com.tngtech.jgiven.impl.util;2public class ThrowableUtil {3    public static boolean isAssumptionException(Throwable t) {4        return t.getClass().getName().equals( "org.junit.AssumptionViolatedException" )5            || t.getClass().getName().equals( "org.testng.SkipException");6    }7}...

ThrowableUtil

Using AI Code Generation

1import com.tngtech.jgiven.impl.util.ThrowableUtil;2public class TestJgiven {3    public static void main(String[] args) {4        try {5            throw new Exception("This is a test exception");6        } catch (Exception e) {7            System.out.println(ThrowableUtil.getStackTrace(e));8        }9    }10}11    at TestJgiven.main(TestJgiven.java:9)

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