How to use validateConstructor method of org.junit.runners.parameterized.BlockJUnit4RunnerWithParameters class

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1import org.junit.Test;2import org.junit.runner.RunWith;3import org.junit.runners.Parameterized;4import java.util.Arrays;5import java.util.Collection;6@RunWith(Parameterized.class)7public class JunitTest {8 private int input;9 private int expected;10 public JunitTest(int input, int expected) {11 this.input = input;12 this.expected = expected;13 }14 public static Collection<Object[]> data() {15 Object[][] data = new Object[][]{{1, 1}, {2, 2}, {3, 3}};16 return Arrays.asList(data);17 }18 public void test() {19 System.out.println("test(" + input + ") = " + expected);20 }21}22test(1) = 123test(2) = 224test(3) = 325@RunWith(Parameterized.class)26public class JunitTest {27 private int input;28 private int expected;29 public JunitTest(int input, int expected) {30 this.input = input;31 this.expected = expected;32 }33 public static Collection<Object[]> data() {34 Object[][] data = new Object[][]{{1, 1}, {2, 2}, {3, 3}};35 return Arrays.asList(data);36 }37 public void test() {38 System.out.println("test(" + input + ") = " + expected);39 }40}41test(1) = 142test(2) = 243test(3) = 344@RunWith(Parameterized.class)45public class JunitTest {46 @Parameterized.Parameter(0)47 public int input;48 @Parameterized.Parameter(1)49 public int expected;50 public static Collection<Object[]> data() {51 Object[][] data = new Object[][]{{1, 1}, {2, 2}, {

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validateConstructor

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1public class TestRunner {2 private static final String[] TEST_CLASSES = { "com.example.test1", "com.example.test2" };3 public static void main(String[] args) throws InitializationError {4 for (String testClass : TEST_CLASSES) {5 System.out.println("Running tests for: " + testClass);6 BlockJUnit4RunnerWithParameters runner = new BlockJUnit4RunnerWithParameters(7 Class.forName(testClass));8 try {9 runner.validateConstructor();10 } catch (Throwable e) {11 System.out.println("Error: " + e.getMessage());12 }13 }14 }15}

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1[ERROR] symbol: method validateConstructor(java.lang.Class)2[ERROR] symbol: method validateConstructor(java.lang.Class)3[ERROR] symbol: method validateConstructor(java.lang.Class)4[ERROR] symbol: method validateConstructor(java.lang.Class)5[ERROR] symbol: method validateConstructor(java.lang.Class)6[ERROR] symbol: method validateConstructor(java

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You need to have prepared the class calling the constructor, not the class on which the constructor is called, the following should fix you up:

@PrepareForTest(DummyTarget.class)

For more information check this page.

https://stackoverflow.com/questions/13481702/powermock-mocking-constructor-via-whennew-does-not-work-with-anonymous-class

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