How to use TestedOnSupplier class of org.junit.experimental.theories.suppliers package

Best junit code snippet using org.junit.experimental.theories.suppliers.TestedOnSupplier

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...9/​* */​ 10/​* */​ 11/​* */​ 12/​* */​ 13/​* */​ public class TestedOnSupplier14/​* */​ extends ParameterSupplier15/​* */​ {16/​* */​ public List<PotentialAssignment> getValueSources(ParameterSignature sig) {17/​* 17 */​ List<PotentialAssignment> list = new ArrayList<PotentialAssignment>();18/​* 18 */​ TestedOn testedOn = (TestedOn)sig.getAnnotation(TestedOn.class);19/​* 19 */​ int[] ints = testedOn.ints();20/​* 20 */​ for (int i : ints) {21/​* 21 */​ list.add(PotentialAssignment.forValue("ints", Integer.valueOf(i)));22/​* */​ }23/​* 23 */​ return list;24/​* */​ }25/​* */​ }26/​* Location: /​home/​arpit/​Downloads/​Picking-Tool-6.5.2.jar!/​org/​junit/​experimental/​theories/​suppliers/​TestedOnSupplier.class27 * Java compiler version: 5 (49.0)28 * JD-Core Version: 1.1.329 */​...

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...6import org.junit.Test;7import org.junit.experimental.theories.ParameterSignature;8import org.junit.experimental.theories.PotentialAssignment;9import org.junit.experimental.theories.suppliers.TestedOn;10import org.junit.experimental.theories.suppliers.TestedOnSupplier;11public class TestedOnSupplierTest {12 public void foo(@TestedOn(ints = {1}) int x) {13 }14 @Test15 public void descriptionStatesParameterName() throws Exception {16 TestedOnSupplier supplier = new TestedOnSupplier();17 List<PotentialAssignment> assignments = supplier.getValueSources(signatureOfFoo());18 assertThat(assignments.get(0).getDescription(), is("\"1\" <from ints>"));19 }20 private ParameterSignature signatureOfFoo() throws NoSuchMethodException {21 Method method = getClass().getMethod("foo", int.class);22 return ParameterSignature.signatures(method).get(0);23 }24}...

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TestedOnSupplier

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1import org.junit.experimental.theories.suppliers.TestedOnSupplier;2import org.junit.experimental.theories.Theories;3import org.junit.experimental.theories.Theory;4import org.junit.runner.RunWith;5@RunWith(Theories.class)6public class TheoriesExample {7 public void testWithSupplier(@TestedOn(ints = {1, 2, 3, 4, 5}) int value) {8 System.out.println("value = " + value);9 }10}11public static int dataPoint1 = 1;12public static int dataPoint2 = 2;13public static int dataPoint3 = 3;14public static int dataPoint4 = 4;15public static int dataPoint5 = 5;16public static int dataPoint6 = 6;17public static int dataPoint7 = 7;18public static int dataPoint8 = 8;19public static int dataPoint9 = 9;20public static int dataPoint10 = 10;21public static int dataPoint11 = 11;22public static int dataPoint12 = 12;23public static int dataPoint13 = 13;24public static int dataPoint14 = 14;25public static int dataPoint15 = 15;26public static int dataPoint16 = 16;27public static int dataPoint17 = 17;28public static int dataPoint18 = 18;29public static int dataPoint19 = 19;30public static int dataPoint20 = 20;31public static int dataPoint21 = 21;32public static int dataPoint22 = 22;33public static int dataPoint23 = 23;34public static int dataPoint24 = 24;

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TestedOnSupplier

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1package com.javacodegeeks.junit.theories;2import org.junit.experimental.theories.DataPoint;3import org.junit.experimental.theories.Theories;4import org.junit.experimental.theories.Theory;5import org.junit.runner.RunWith;6import org.junit.experimental.theories.suppliers.TestedOn;7@RunWith(Theories.class)8public class TestedOnExample {9 public static int intData = 1;10 public void testInt(@TestedOn(ints = { 1, 2, 3 }) int data) {11 System.out.println("Data: " + data);12 }13}

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TestedOnSupplier

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1public class TestedOnSupplierTest {2 public void test(@TestedOn(ints = { 1, 2, 3 }) int i) {3 assertTrue(i > 0 && i < 4);4 }5}6public class TestWithSupplierTest {7 public void test(@TestWith(supplier = StringSupplier.class, value = "Hello") String s) {8 assertEquals("Hello", s);9 }10}11public class TestWithSupplierTest {12 public void test(@TestedOn(ints = { 1, 2, 3 }) int i) {13 assertTrue(i > 0 && i < 4);14 }15}16public class TestWithSupplierTest {17 public void test(@TestWith(supplier = StringSupplier.class, value = "Hello") String s) {18 assertEquals("Hello", s);19 }20}21public class TestedOnSupplierTest {22 public void test(@TestedOn(ints = { 1, 2, 3 }) int i) {23 assertTrue(i > 0 && i < 4);24 }25}26public class TestWithSupplierTest {27 public void test(@TestWith(supplier = StringSupplier.class, value = "Hello") String s) {28 assertEquals("Hello", s);29 }30}31public class TestedOnSupplierTest {32 public void test(@TestedOn(ints = { 1, 2, 3 }) int i) {33 assertTrue(i > 0 && i < 4);34 }35}36public class TestWithSupplierTest {37 public void test(@TestWith(supplier = StringSupplier.class, value = "Hello") String s) {

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TestedOnSupplier

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1import org.junit.experimental.theories.suppliers.TestedOnSupplier;2import org.junit.experimental.theories.suppliers.TestedOn;3public class TheoryTest {4 public void testTheory(@TestedOn(ints = {1, 2, 3, 4}) int i) {5 System.out.println(i);6 }7}8@RunWith(Theories.class)9public class TheoryTest {10 public void testTheory(@TestedOn(ints = {1, 2, 3, 4}) int i) {11 System.out.println(i);12 }13}14public static int[] dataPoints = new int[]{1, 2, 3, 4};15@RunWith(Theories.class)16public class TheoryTest {17 public void testTheory(@DataPoint int i) {18 System.out.println(i);19 }20}21@RunWith(Theories.class)22public class TheoryTest {23 public static int[] dataPoints = new int[]{1, 2, 3, 4};24 public void testTheory(@DataPoint int i) {25 System.out.println(i);26 }27}28@RunWith(Theories.class)29public class TheoryTest {30 public static int[] dataPoints = new int[]{1, 2, 3, 4

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TestedOnSupplier

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1import org.junit.experimental.theories.DataPoint;2import org.junit.experimental.theories.DataPoints;3import org.junit.experimental.theories.Theories;4import org.junit.experimental.theories.Theory;5import org.junit.runner.RunWith;6@RunWith(Theories.class)7public class TheoriesTest {8 public static int INT_VALUE = 10;9 public static int[] INT_VALUES = {1, 2, 3};10 public void testTheory(int intValue, int[] intValues) {11 System.out.println(intValue);12 for (int value : intValues) {13 System.out.println(value);14 }15 }16}17TheoriesTest.java:18: error: no suitable constructor found for TestedOn(int)18 public void testTheory(int intValue, int[] intValues) {19 constructor org.junit.experimental.theories.Theory.public org.junit.experimental.theories.Theory(java.lang.String,int[],int[],java.lang.String) is not applicable20 (actual and formal argument lists differ in length)21 constructor org.junit.experimental.theories.Theory.public org.junit.experimental.theories.Theory(java.lang.String,int[],int[],java.lang.String,java.lang.String) is not applicable22 (actual and formal argument lists differ in length)23 constructor org.junit.experimental.theories.Theory.public org.junit.experimental.theories.Theory(java.lang.String,int[],int[],java.lang.String,java.lang.String,java.lang.String) is not applicable24 (actual and formal argument lists differ in length)25 constructor org.junit.experimental.theories.Theory.public org.junit.experimental.theories.Theory(java.lang.String,int[],int[],java.lang.String,java.lang.String,java.lang.String,java.lang.String) is not applicable26 (actual and formal argument lists differ in length)27 constructor org.junit.experimental.theories.Theory.public org.junit.experimental.theories.Theory(java.lang.String,int[],int[],java.lang.String,java.lang.String,java.lang.String,java.lang.String,org.junit.experimental.theories.ParameterSupplier[]) is not applicable28 (actual and formal argument lists differ in length)29 constructor org.junit.experimental.theories.Theory.public org.junit.experimental.theories.Theory(java.lang.String,int[],int[],java.lang.String,java.lang.String,java

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TestedOnSupplier

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1package com.journaldev.junit.theories;2import org.junit.experimental.theories.DataPoint;3import org.junit.experimental.theories.Theories;4import org.junit.experimental.theories.Theory;5import org.junit.runner.RunWith;6import org.junit.experimental.theories.suppliers.TestedOnSupplier;7@RunWith(Theories.class)8public class JUnitTheoriesTest {9 public static int dataPoint1 = 10;10 public static int dataPoint2 = 20;11 public static int dataPoint3 = 30;12 public static int dataPoint4 = 40;13 public static int dataPoint5 = 50;14 public static int dataPoint6 = 60;15 public static int dataPoint7 = 70;16 public static int dataPoint8 = 80;17 public static int dataPoint9 = 90;18 public static int dataPoint10 = 100;19 public static int[] dataPointArray = new TestedOnSupplier(int[].class, "1, 2, 3, 4, 5").getValues();20 public static String dataPointString = "Hello";21 public void testTheory(int i, int j, int[] k, String str) {22 System.out.println(i + " " + j + " " + k[0] + " " + str);23 }24}

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TestedOnSupplier

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1import org.junit.experimental.theories.suppliers.TestedOnSupplier;2public void testWithTestedOnSupplier() {3 new Theory(new DataPointSupplier() {4 public List<PotentialAssignment> getValueSources(final TheoryParameterSignature sig) {5 return new TestedOnSupplier(sig.getType(), new int[] { 1, 2, 3 }).getValueSources(sig);6 }7 }) {8 {9 int i = 0;10 addDataPoints("i", i);11 }12 public void testWithTestedOnSupplier(int i) {13 assertTrue(i >= 1 && i <= 3);14 }15 }.perform();16}17import org.junit.experimental.theories.suppliers.TestNameSupplier;18public void testWithTestNameSupplier() {19 new Theory(new DataPointSupplier() {20 public List<PotentialAssignment> getValueSources(final TheoryParameterSignature sig) {21 return new TestNameSupplier().getValueSources(sig);22 }23 }) {24 {25 String s = null;26 addDataPoints("s", s);27 }28 public void testWithTestNameSupplier(String s) {29 assertNotNull(s);30 }31 }.perform();32}33import org.junit.experimental.theories.suppliers.TestedOnSupplier;34public void testWithTestedOnSupplier() {35 new Theory(new DataPointSupplier() {36 public List<PotentialAssignment> getValueSources(final TheoryParameterSignature sig) {37 return new TestedOnSupplier(sig.getType(), new int[] {

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1public class TestTheories {2public void testWithSupplier(@TestedOn(ints = { 1, 2, 3 }) int argument) {3System.out.println("Argument value is : " + argument);4}5}6public class TestTheories {7public static int[] dataPoints = { 1, 2, 3 };8public void testWithFromDataPoints(@FromDataPoints("dataPoints") int argument) {9System.out.println("Argument value is : " + argument);10}11}12@RunWith(Theories.class)13public class TestTheories {14public static int[] dataPoints = { 1, 2, 3 };15public void testWithFromDataPoints(@FromDataPoints("dataPoints") int argument) {16System.out.println("Argument value is : " + argument);17}18}

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StackOverFlow community discussions

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Discussion

JUnit 4 Expected Exception type

java: how to mock Calendar.getInstance()?

Changing names of parameterized tests

Mocking a class vs. mocking its interface

jUnit ignore @Test methods from base class

Important frameworks/tools to learn

Unit testing a Java Servlet

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Different teardown for each @Test in jUnit

Best way to automagically migrate tests from JUnit 3 to JUnit 4?

There's actually an alternative to the @Test(expected=Xyz.class) in JUnit 4.7 using Rule and ExpectedException

In your test case you declare an ExpectedException annotated with @Rule, and assign it a default value of ExpectedException.none(). Then in your test that expects an exception you replace the value with the actual expected value. The advantage of this is that without using the ugly try/catch method, you can further specify what the message within the exception was

@Rule public ExpectedException thrown= ExpectedException.none();

@Test
public void myTest() {
    thrown.expect( Exception.class );
    thrown.expectMessage("Init Gold must be >= 0");

    rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}

Using this method, you might be able to test for the message in the generic exception to be something specific.

ADDITION Another advantage of using ExpectedException is that you can more precisely scope the exception within the context of the test case. If you are only using @Test(expected=Xyz.class) annotation on the test, then the Xyz exception can be thrown anywhere in the test code -- including any test setup or pre-asserts within the test method. This can lead to a false positive.

Using ExpectedException, you can defer specifying the thrown.expect(Xyz.class) until after any setup and pre-asserts, just prior to actually invoking the method under test. Thus, you more accurately scope the exception to be thrown by the actual method invocation rather than any of the test fixture itself.

JUnit 5 NOTE:

JUnit 5 JUnit Jupiter has removed @Test(expected=...), @Rule and ExpectedException altogether. They are replaced with the new assertThrows(), which requires the use of Java 8 and lambda syntax. ExpectedException is still available for use in JUnit 5 through JUnit Vintage. Also JUnit Jupiter will also continue to support JUnit 4 ExpectedException through use of the junit-jupiter-migrationsupport module, but only if you add an additional class-level annotation of @EnableRuleMigrationSupport.

https://stackoverflow.com/questions/16723715/junit-4-expected-exception-type

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