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package junitparams.internal;
import java.lang.reflect.Field;
import org.junit.internal.AssumptionViolatedException;
import org.junit.internal.runners.model.EachTestNotifier;
import org.junit.runner.Description;
import org.junit.runner.notification.RunNotifier;
import org.junit.runners.model.Statement;
/**
* Testmethod-level functionalities for parameterised tests
*
* @author Pawel Lipinski
*/
public class ParameterisedTestMethodRunner {
public final TestMethod method;
private int count;
public ParameterisedTestMethodRunner(TestMethod testMethod) {
this.method = testMethod;
}
public int nextCount() {
return count++;
}
public int count() {
return count;
}
Object currentParamsFromAnnotation() {
return method.parametersSets()[nextCount()];
}
void runTestMethod(Statement methodInvoker, RunNotifier notifier) {
Description methodWithParams = findChildForParams(methodInvoker, method.describe());
runMethodInvoker(notifier, methodInvoker, methodWithParams);
}
private void runMethodInvoker(RunNotifier notifier, Statement methodInvoker, Description methodWithParams) {
EachTestNotifier eachNotifier = new EachTestNotifier(notifier, methodWithParams);
eachNotifier.fireTestStarted();
try {
methodInvoker.evaluate();
} catch (AssumptionViolatedException e) {
eachNotifier.addFailedAssumption(e);
} catch (Throwable e) {
eachNotifier.addFailure(e);
} finally {
eachNotifier.fireTestFinished();
}
}
private Description findChildForParams(Statement methodInvoker, Description methodDescription) {
if (System.getProperty("JUnitParams.flat") != null)
return methodDescription;
InvokeParameterisedMethod parameterisedInvoker = findParameterisedMethodInvokerInChain(methodInvoker);
for (Description child : methodDescription.getChildren()) {
if (parameterisedInvoker.matchesDescription(child))
return child;
}
return null;
}
private InvokeParameterisedMethod findParameterisedMethodInvokerInChain(Statement methodInvoker) {
while (methodInvoker != null && !(methodInvoker instanceof InvokeParameterisedMethod))
methodInvoker = nextChainedInvoker(methodInvoker);
if (methodInvoker == null)
throw new RuntimeException("Cannot find invoker for the parameterised method. Using wrong JUnit version?");
return (InvokeParameterisedMethod) methodInvoker;
}
private Statement nextChainedInvoker(Statement methodInvoker) {
Field[] declaredFields = methodInvoker.getClass().getDeclaredFields();
for (Field field : declaredFields) {
Statement statement = statementOrNull(methodInvoker, field);
if (statement != null)
return statement;
}
return null;
}
private Statement statementOrNull(Statement methodInvoker, Field field) {
if (Statement.class.isAssignableFrom(field.getType()))
return getOriginalStatement(methodInvoker, field);
return null;
}
private Statement getOriginalStatement(Statement methodInvoker, Field field) {
field.setAccessible(true);
try {
return (Statement) field.get(methodInvoker);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
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