How to use Annotation Type Parameterized.BeforeParam class of org.junit.runners package

Best junit code snippet using org.junit.runners.Annotation Type Parameterized.BeforeParam

Source:BlockJUnit4ClassRunnerWithParameters.java

1package org.junit.runners.parameterized;2import java.lang.annotation.Annotation;3import java.lang.reflect.Field;4import java.util.List;5import org.junit.internal.runners.statements.RunAfters;6import org.junit.internal.runners.statements.RunBefores;7import org.junit.runner.RunWith;8import org.junit.runner.notification.RunNotifier;9import org.junit.runners.BlockJUnit4ClassRunner;10import org.junit.runners.Parameterized;11import org.junit.runners.Parameterized.Parameter;12import org.junit.runners.model.FrameworkField;13import org.junit.runners.model.FrameworkMethod;14import org.junit.runners.model.InitializationError;15import org.junit.runners.model.Statement;16/**17 * A {@link BlockJUnit4ClassRunner} with parameters support. Parameters can be18 * injected via constructor or into annotated fields.19 */20public class BlockJUnit4ClassRunnerWithParameters extends21        BlockJUnit4ClassRunner {22    private enum InjectionType {23        CONSTRUCTOR, FIELD24    }25    private final Object[] parameters;26    private final String name;27    public BlockJUnit4ClassRunnerWithParameters(TestWithParameters test)28            throws InitializationError {29        super(test.getTestClass());30        parameters = test.getParameters().toArray(31                new Object[test.getParameters().size()]);32        name = test.getName();33    }34    @Override35    public Object createTest() throws Exception {36        InjectionType injectionType = getInjectionType();37        switch (injectionType) {38            case CONSTRUCTOR:39                return createTestUsingConstructorInjection();40            case FIELD:41                return createTestUsingFieldInjection();42            default:43                throw new IllegalStateException("The injection type "44                        + injectionType + " is not supported.");45        }46    }47    private Object createTestUsingConstructorInjection() throws Exception {48        return getTestClass().getOnlyConstructor().newInstance(parameters);49    }50    private Object createTestUsingFieldInjection() throws Exception {51        List<FrameworkField> annotatedFieldsByParameter = getAnnotatedFieldsByParameter();52        if (annotatedFieldsByParameter.size() != parameters.length) {53            throw new Exception(54                    "Wrong number of parameters and @Parameter fields."55                            + " @Parameter fields counted: "56                            + annotatedFieldsByParameter.size()57                            + ", available parameters: " + parameters.length58                            + ".");59        }60        Object testClassInstance = getTestClass().getJavaClass().newInstance();61        for (FrameworkField each : annotatedFieldsByParameter) {62            Field field = each.getField();63            Parameter annotation = field.getAnnotation(Parameter.class);64            int index = annotation.value();65            try {66                field.set(testClassInstance, parameters[index]);67            } catch (IllegalAccessException e) {68                IllegalAccessException wrappedException = new IllegalAccessException(69                        "Cannot set parameter '" + field.getName()70                                + "'. Ensure that the field '" + field.getName()71                                + "' is public.");72                wrappedException.initCause(e);73                throw wrappedException;74            } catch (IllegalArgumentException iare) {75                throw new Exception(getTestClass().getName()76                        + ": Trying to set " + field.getName()77                        + " with the value " + parameters[index]78                        + " that is not the right type ("79                        + parameters[index].getClass().getSimpleName()80                        + " instead of " + field.getType().getSimpleName()81                        + ").", iare);82            }83        }84        return testClassInstance;85    }86    @Override87    protected String getName() {88        return name;89    }90    @Override91    protected String testName(FrameworkMethod method) {92        return method.getName() + getName();93    }94    @Override95    protected void validateConstructor(List<Throwable> errors) {96        validateOnlyOneConstructor(errors);97        if (getInjectionType() != InjectionType.CONSTRUCTOR) {98            validateZeroArgConstructor(errors);99        }100    }101    @Override102    protected void validateFields(List<Throwable> errors) {103        super.validateFields(errors);104        if (getInjectionType() == InjectionType.FIELD) {105            List<FrameworkField> annotatedFieldsByParameter = getAnnotatedFieldsByParameter();106            int[] usedIndices = new int[annotatedFieldsByParameter.size()];107            for (FrameworkField each : annotatedFieldsByParameter) {108                int index = each.getField().getAnnotation(Parameter.class)109                        .value();110                if (index < 0 || index > annotatedFieldsByParameter.size() - 1) {111                    errors.add(new Exception("Invalid @Parameter value: "112                            + index + ". @Parameter fields counted: "113                            + annotatedFieldsByParameter.size()114                            + ". Please use an index between 0 and "115                            + (annotatedFieldsByParameter.size() - 1) + "."));116                } else {117                    usedIndices[index]++;118                }119            }120            for (int index = 0; index < usedIndices.length; index++) {121                int numberOfUse = usedIndices[index];122                if (numberOfUse == 0) {123                    errors.add(new Exception("@Parameter(" + index124                            + ") is never used."));125                } else if (numberOfUse > 1) {126                    errors.add(new Exception("@Parameter(" + index127                            + ") is used more than once (" + numberOfUse + ")."));128                }129            }130        }131    }132    @Override133    protected Statement classBlock(RunNotifier notifier) {134        Statement statement = childrenInvoker(notifier);135        statement = withBeforeParams(statement);136        statement = withAfterParams(statement);137        return statement;138    }139    private Statement withBeforeParams(Statement statement) {140        List<FrameworkMethod> befores = getTestClass()141                .getAnnotatedMethods(Parameterized.BeforeParam.class);142        return befores.isEmpty() ? statement : new RunBeforeParams(statement, befores);143    }144    private class RunBeforeParams extends RunBefores {145        RunBeforeParams(Statement next, List<FrameworkMethod> befores) {146            super(next, befores, null);147        }148        @Override149        protected void invokeMethod(FrameworkMethod method) throws Throwable {150            int paramCount = method.getMethod().getParameterTypes().length;151            method.invokeExplosively(null, paramCount == 0 ? (Object[]) null : parameters);152        }153    }154    private Statement withAfterParams(Statement statement) {155        List<FrameworkMethod> afters = getTestClass()156                .getAnnotatedMethods(Parameterized.AfterParam.class);157        return afters.isEmpty() ? statement : new RunAfterParams(statement, afters);158    }159    private class RunAfterParams extends RunAfters {160        RunAfterParams(Statement next, List<FrameworkMethod> afters) {161            super(next, afters, null);162        }163        @Override164        protected void invokeMethod(FrameworkMethod method) throws Throwable {165            int paramCount = method.getMethod().getParameterTypes().length;166            method.invokeExplosively(null, paramCount == 0 ? (Object[]) null : parameters);167        }168    }169    @Override170    protected Annotation[] getRunnerAnnotations() {171        Annotation[] allAnnotations = super.getRunnerAnnotations();172        Annotation[] annotationsWithoutRunWith = new Annotation[allAnnotations.length - 1];173        int i = 0;174        for (Annotation annotation: allAnnotations) {175            if (!annotation.annotationType().equals(RunWith.class)) {176                annotationsWithoutRunWith[i] = annotation;177                ++i;178            }179        }180        return annotationsWithoutRunWith;181    }182    private List<FrameworkField> getAnnotatedFieldsByParameter() {183        return getTestClass().getAnnotatedFields(Parameter.class);184    }185    private InjectionType getInjectionType() {186        if (fieldsAreAnnotated()) {187            return InjectionType.FIELD;188        } else {189            return InjectionType.CONSTRUCTOR;190        }191    }192    private boolean fieldsAreAnnotated() {193        return !getAnnotatedFieldsByParameter().isEmpty();194    }195}...

Annotation Type Parameterized.BeforeParam

Using AI Code Generation

1import org.junit.runner.RunWith;2import org.junit.runners.Parameterized;3import org.junit.runners.Parameterized.Parameters;4import java.util.Arrays;5import java.util.Collection;6@RunWith(Parameterized.class)7public class BeforeParam {8    public static Collection<Object[]> data() {9        return Arrays.asList(new Object[][] { { "is" }, { "a" }, { "test" } });10    }11    private String fInput;12    public BeforeParam(String input) {13        fInput = input;14    }15}16import static org.junit.Assert.assertEquals;17import org.junit.Test;18import org.junit.runner.RunWith;19import org.junit.runners.Parameterized;20import org.junit.runners.Parameterized.Parameters;21import java.util.Arrays;22import java.util.Collection;23@RunWith(Parameterized.class)24public class AfterParam {25    public static Collection<Object[]> data() {26        return Arrays.asList(new Object[][] { { "is" }, { "a" }, { "test" } });27    }28    private String fInput;29    public AfterParam(String input) {30        fInput = input;31    }32    public void test() {33        assertEquals("a", fInput);34    }35}36import static org.junit.Assert.assertEquals;37import org.junit.Test;38import org.junit.runner.RunWith;39import org.junit.runners.Parameterized;40import org.junit.runners.Parameterized.Parameters;41import java.util.Arrays;42import java.util.Collection;43@RunWith(Parameterized.class)44public class BeforeParam {45    public static Collection<Object[]> data() {46        return Arrays.asList(new Object[][] { { "is" }, { "a" }, { "test" } });47    }48    private String fInput;49    public BeforeParam(String input) {50        fInput = input;51    }52    public void test() {53        assertEquals("a", fInput);54    }55}56import static org.junit.Assert.assertEquals;57import org.junit.Test;58import org.junit.runner.RunWith;59import org.junit.runners.Parameterized;60import org.junit.runners.Parameterized.Parameters;61import java.util.Arrays;62import java.util.Collection;63@RunWith(Parameterized.class)64public class AfterParam {65    public static Collection<Object[]> data() {66        return Arrays.asList(new Object[][] {

Annotation Type Parameterized.BeforeParam

Using AI Code Generation

1import java.util.Arrays;2import java.util.Collection;3import org.junit.Test;4import org.junit.runner.RunWith;5import org.junit.runners.Parameterized;6import org.junit.runners.Parameterized.Parameters;7@RunWith(Parameterized.class)8public class TestParameterized {9	public static Collection<Object[]> data(){10		return Arrays.asList(new Object[][] {11			{1, 2}, {5, 3}, {121, 4}12		});13	}14	private int input;15	private int expected;16	public TestParameterized(int input, int expected) {17		this.input = input;18		this.expected = expected;19	}20	public void test() {21		System.out.println(input + " " + expected);22	}23}24import java.util.Arrays;25import java.util.Collection;26import org.junit.Test;27import org.junit.runner.RunWith;28import org.junit.runners.Parameterized;29import org.junit.runners.Parameterized.Parameters;30@RunWith(Parameterized.class)31public class TestParameterized {32	public static Collection<Object[]> data(){33		return Arrays.asList(new Object[][] {34			{1, 2}, {5, 3}, {121, 4}35		});36	}37	private int input;38	private int expected;39	public TestParameterized(int input, int expected) {40		this.input = input;41		this.expected = expected;42	}43	public void test() {44		System.out.println(input + " " + expected);45	}46}47import java.util.Arrays;48import java.util.Collection;49import org.junit.Test;50import org.junit.runner.RunWith;51import org.junit.runners.Parameterized;52import org.junit.runners.Parameterized.Parameters;53@RunWith(Parameterized.class)54public class TestParameterized {55	public static Collection<Object[]> data(){56		return Arrays.asList(new Object[][] {57			{1, 2}, {5, 3}, {121, 4}58		});59	}60	private int input;61	private int expected;62	public TestParameterized(int input, int expected) {63		this.input = input;

Annotation Type Parameterized.BeforeParam

Using AI Code Generation

1import org.junit.runners.Parameterized;2import java.util.Arrays;3import java.util.Collection;4import org.junit.Before;5import org.junit.Test;6import org.junit.runner.RunWith;7import static org.junit.Assert.*;8@RunWith(Parameterized.class)9public class BeforeParamTest {10   private int number;11   private boolean result;12   public void initialize() {13      System.out.println("BeforeParamTest.initialize()");14   }15   public BeforeParamTest(int number, boolean result) {16      this.number = number;17      this.result = result;18   }19   public static Collection primeNumbers() {20      return Arrays.asList(new Object[][] {21         { 2, true },22         { 6, false },23         { 19, true },24         { 22, false },25         { 23, true }26      });27   }28   public void testPrimeNumberChecker() {29      System.out.println("Parameterized Number is : " + number);30      assertEquals(result, BeforeParamTest.isPrime(number));31   }32   private static boolean isPrime(int number) {33      for(int i=2; i < (number/2); i++) {34         if(number % i == 0) {35            return false;36         }37      }38      return true;39   }40}41BeforeParamTest.initialize()42BeforeParamTest.initialize()43BeforeParamTest.initialize()44BeforeParamTest.initialize()45BeforeParamTest.initialize()46package com.journaldev.junit;47import org.junit.runners.Parameterized;48import java.util.Arrays;49import java.util.Collection;50import org.junit.Before;51import org.junit.Rule;52import org.junit.Test;53import org.junit.runner.RunWith;54import org.junit.rules.ExpectedException;55import static org.junit.Assert.*;56@RunWith(Parameterized.class)57public class BeforeParamRuleTest {58   private int number;59   private boolean result;60   public ExpectedException thrown = ExpectedException.none();

Annotation Type Parameterized.BeforeParam

Using AI Code Generation

1@RunWith(Parameterized.class)2public class TestJunit1 {3    private String name;4    private int age;5    public TestJunit1(String name, int age) {6        this.name = name;7        this.age = age;8    }9    public String getName() {10        return name;11    }12    public int getAge() {13        return age;14    }15    public static Collection<Object[]> data() {16        Object[][] data = new Object[][] { { "John", 20 }, { "Steve", 30 }, { "Bill", 40 } };17        return Arrays.asList(data);18    }19    public void test() {20        System.out.println("Parameterized name is : " + name);21        System.out.println("Parameterized age is : " + age);22    }23}24@RunWith(Parameterized.class)25public class TestJunit1 {26    private String name;27    private int age;28    public TestJunit1(String name, int age) {29        this.name = name;30        this.age = age;31    }32    public String getName() {33        return name;34    }35    public int getAge() {36        return age;37    }38    public static Collection<Object[]> data() {39        Object[][] data = new Object[][] { { "John", 20 }, { "Steve", 30 }, { "Bill", 40 } };40        return Arrays.asList(data);41    }42    public void test() {43        System.out.println("Parameterized name is : " + name);44        System.out.println("Parameterized age is : " + age);45    }46    public void beforeParam() {47        System.out.println("Before

Annotation Type Parameterized.BeforeParam

Using AI Code Generation

1@RunWith(Parameterized.class)2public class ParameterizedTest {3    private int number;4    public ParameterizedTest(int number) {5        this.number = number;6    }7    public static Collection<Object[]> data() {8        Object[][] data = new Object[][] { { 1 }, { 2 }, { 3 }, { 4 }, { 5 } };9        return Arrays.asList(data);10    }11    public void test() {12        assertTrue(number > 0 && number < 6);13    }14}15@RunWith(Parameterized.class)16public class ParameterizedTest {17public ParameterizedTest(int number) {18this.number = number;19public static Collection<Object[]> data() {20Object[][] data = new Object[][] { { 1 }, { 2 }, { 3 }, { 4 }, { 5 } };21return Arrays.asList(data);22assertTrue(number > 0 && number < 6);23I am using JUnit 4.12 and I have imported the following:24import org.junit.Test;25import org

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