16797:M 03 Aug 2020 09:11:11.246 # Error accepting a client connection: (null)
Best junit code snippet using org.junit.experimental.theories.Theories
Source: DataPoints.java
...7/**8 * Annotating an array or iterable-typed field or method with @DataPoints9 * will cause the values in the array or iterable given to be used as potential10 * parameters for theories in that class when run with the11 * {@link org.junit.experimental.theories.Theories Theories} runner.12 * <p>13 * DataPoints will only be considered as potential values for parameters for14 * which their types are assignable. When multiple sets of DataPoints exist with15 * overlapping types more control can be obtained by naming the DataPoints using16 * the value of this annotation, e.g. with17 * <code>@DataPoints({"dataset1", "dataset2"})</code>, and then specifying18 * which named set to consider as potential values for each parameter using the19 * {@link org.junit.experimental.theories.FromDataPoints @FromDataPoints}20 * annotation.21 * <p>22 * Parameters with no specified source (i.e. without @FromDataPoints or23 * other {@link org.junit.experimental.theories.ParametersSuppliedBy24 * @ParameterSuppliedBy} annotations) will use all DataPoints that are25 * assignable to the parameter type as potential values, including named sets of26 * DataPoints.27 * <p>28 * DataPoints methods whose array types aren't assignable from the target29 * parameter type (and so can't possibly return relevant values) will not be30 * called when generating values for that parameter. Iterable-typed datapoints31 * methods must always be called though, as this information is not available32 * here after generic type erasure, so expensive methods returning iterable33 * datapoints are a bad idea.34 * 35 * <pre>36 * @DataPoints37 * public static String[] dataPoints = new String[] { ... };38 * 39 * @DataPoints40 * public static String[] generatedDataPoints() {41 * return new String[] { ... };42 * }43 * 44 * @Theory45 * public void theoryMethod(String param) {46 * ...47 * }48 * </pre>49 * 50 * @see org.junit.experimental.theories.Theories51 * @see org.junit.experimental.theories.Theory52 * @see org.junit.experimental.theories.DataPoint53 * @see org.junit.experimental.theories.FromDataPoints54 */55@Retention(RetentionPolicy.RUNTIME)56@Target({ FIELD, METHOD })57public @interface DataPoints {58 String[] value() default {};59 Class<? extends Throwable>[] ignoredExceptions() default {};60}...
Source: DataPoint.java
...7/**8 * Annotating an field or method with @DataPoint will cause the field value9 * or the value returned by the method to be used as a potential parameter for10 * theories in that class, when run with the11 * {@link org.junit.experimental.theories.Theories Theories} runner.12 * <p>13 * A DataPoint is only considered as a potential value for parameters for14 * which its type is assignable. When multiple {@code DataPoint}s exist 15 * with overlapping types more control can be obtained by naming each DataPoint 16 * using the value of this annotation, e.g. with17 * <code>@DataPoint({"dataset1", "dataset2"})</code>, and then specifying18 * which named set to consider as potential values for each parameter using the19 * {@link org.junit.experimental.theories.FromDataPoints @FromDataPoints}20 * annotation.21 * <p>22 * Parameters with no specified source (i.e. without @FromDataPoints or23 * other {@link org.junit.experimental.theories.ParametersSuppliedBy24 * @ParameterSuppliedBy} annotations) will use all {@code DataPoint}s that are25 * assignable to the parameter type as potential values, including named sets of26 * {@code DataPoint}s.27 * 28 * <pre>29 * @DataPoint30 * public static String dataPoint = "value";31 * 32 * @DataPoint("generated")33 * public static String generatedDataPoint() {34 * return "generated value";35 * }36 * 37 * @Theory38 * public void theoryMethod(String param) {39 * ...40 * }41 * </pre>42 * 43 * @see org.junit.experimental.theories.Theories44 * @see org.junit.experimental.theories.Theory45 * @see org.junit.experimental.theories.DataPoint46 * @see org.junit.experimental.theories.FromDataPoints47 */48@Retention(RetentionPolicy.RUNTIME)49@Target({FIELD, METHOD})50public @interface DataPoint {51 String[] value() default {};52 Class<? extends Throwable>[] ignoredExceptions() default {};53}...
Source: FromDataPoints.java
1package org.junit.experimental.theories;2import java.lang.annotation.ElementType;3import java.lang.annotation.Retention;4import java.lang.annotation.RetentionPolicy;5import java.lang.annotation.Target;6import org.junit.experimental.theories.internal.SpecificDataPointsSupplier;7/**8 * Annotating a parameter of a {@link org.junit.experimental.theories.Theory9 * @Theory} method with <code>@FromDataPoints</code> will limit the10 * datapoints considered as potential values for that parameter to just the11 * {@link org.junit.experimental.theories.DataPoints DataPoints} with the given12 * name. DataPoint names can be given as the value parameter of the13 * @DataPoints annotation.14 * <p>15 * DataPoints without names will not be considered as values for any parameters16 * annotated with @FromDataPoints.17 * <pre>18 * @DataPoints19 * public static String[] unnamed = new String[] { ... };20 * 21 * @DataPoints("regexes")22 * public static String[] regexStrings = new String[] { ... };23 * 24 * @DataPoints({"forMatching", "alphanumeric"})25 * public static String[] testStrings = new String[] { ... }; 26 * 27 * @Theory28 * public void stringTheory(String param) {29 * // This will be called with every value in 'regexStrings',30 * // 'testStrings' and 'unnamed'.31 * }32 * 33 * @Theory34 * public void regexTheory(@FromDataPoints("regexes") String regex,35 * @FromDataPoints("forMatching") String value) {36 * // This will be called with only the values in 'regexStrings' as 37 * // regex, only the values in 'testStrings' as value, and none 38 * // of the values in 'unnamed'.39 * }40 * </pre>41 * 42 * @see org.junit.experimental.theories.Theory43 * @see org.junit.experimental.theories.DataPoint44 * @see org.junit.experimental.theories.DataPoints45 */46@Retention(RetentionPolicy.RUNTIME)47@Target(ElementType.PARAMETER)48@ParametersSuppliedBy(SpecificDataPointsSupplier.class)49public @interface FromDataPoints {50 String value();51}...
Source: Assignments.java
1public class org.junit.experimental.theories.internal.Assignments {2 public static org.junit.experimental.theories.internal.Assignments allUnassigned(java.lang.reflect.Method, org.junit.runners.model.TestClass);3 public boolean isComplete();4 public org.junit.experimental.theories.ParameterSignature nextUnassigned();5 public org.junit.experimental.theories.internal.Assignments assignNext(org.junit.experimental.theories.PotentialAssignment);6 public java.lang.Object[] getActualValues(int, int) throws org.junit.experimental.theories.PotentialAssignment$CouldNotGenerateValueException;7 public java.util.List<org.junit.experimental.theories.PotentialAssignment> potentialsForNextUnassigned() throws java.lang.Throwable;8 public java.lang.Object[] getConstructorArguments() throws org.junit.experimental.theories.PotentialAssignment$CouldNotGenerateValueException;9 public java.lang.Object[] getMethodArguments() throws org.junit.experimental.theories.PotentialAssignment$CouldNotGenerateValueException;10 public java.lang.Object[] getAllArguments() throws org.junit.experimental.theories.PotentialAssignment$CouldNotGenerateValueException;11 public java.lang.Object[] getArgumentStrings(boolean) throws org.junit.experimental.theories.PotentialAssignment$CouldNotGenerateValueException;12}...
Source: TestedOnSupplier.java
1package org.junit.experimental.theories.suppliers;2import java.util.ArrayList;3import java.util.List;4import org.junit.experimental.theories.ParameterSignature;5import org.junit.experimental.theories.ParameterSupplier;6import org.junit.experimental.theories.PotentialAssignment;7/**8 * @see org.junit.experimental.theories.suppliers.TestedOn9 * @see org.junit.experimental.theories.ParameterSupplier10 */11public class TestedOnSupplier extends ParameterSupplier {12 @Override13 public List<PotentialAssignment> getValueSources(ParameterSignature sig) {14 List<PotentialAssignment> list = new ArrayList<PotentialAssignment>();15 TestedOn testedOn = sig.getAnnotation(TestedOn.class);16 int[] ints = testedOn.ints();17 for (final int i : ints) {18 list.add(PotentialAssignment.forValue("ints", i));19 }20 return list;21 }22}...
Theories
Using AI Code Generation
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;6import org.junit.runners.Suite;7import org.junit.runners.Suite.SuiteClasses;8@RunWith(Theories.class)9public class TheoriesTest {10 public static int INT_PARAM_1 = 5;11 public static int INT_PARAM_2 = 10;12 public static int INT_PARAM_3 = 15;13 public static int INT_PARAM_4 = 20;14 public static int INT_PARAM_5 = 25;15 public static int INT_PARAM_6 = 30;16 public static int INT_PARAM_7 = 35;17 public static int INT_PARAM_8 = 40;18 public static int INT_PARAM_9 = 45;19 public static int INT_PARAM_10 = 50;20 public static int INT_PARAM_11 = 55;21 public static int INT_PARAM_12 = 60;22 public static int INT_PARAM_13 = 65;23 public static int INT_PARAM_14 = 70;24 public static int INT_PARAM_15 = 75;25 public static int INT_PARAM_16 = 80;26 public static int INT_PARAM_17 = 85;27 public static int INT_PARAM_18 = 90;28 public static int INT_PARAM_19 = 95;29 public static int INT_PARAM_20 = 100;30 public static int[] INT_PARAMS = new int[]{INT_PARAM_1, INT_PARAM_2, INT_PARAM_3, INT_PARAM_4, INT_PARAM_5, INT_PARAM_6, INT_PARAM_7, INT_PARAM_8, INT_PARAM_9, INT_PARAM_10, INT_PARAM_11, INT_PARAM_12, INT_PARAM_13, INT_PARAM_14, INT_PARAM_15, INT_PARAM_16, INT_PARAM_17, INT_PARAM_18, INT_PARAM_19, INT_PARAM_20};31 public void testTheory(int param1,
Theories
Using AI Code Generation
1package com.javatpoint;2import org.junit.Test;3import org.junit.experimental.theories.DataPoint;4import org.junit.experimental.theories.DataPoints;5import org.junit.experimental.theories.Theories;6import org.junit.experimental.theories.Theory;7import org.junit.runner.RunWith;8@RunWith(Theories.class)9public class JunitTheoriesExample {10 public static int int1 = 1;11 public static int int2 = 2;12 public static int int3 = 3;13 public static int[] ints = { 4, 5, 6 };14 public void test(int i, int j) {15 System.out.println("i = " + i + ", j = " + j);16 }17}
Theories
Using AI Code Generation
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;6@RunWith(Theories.class)7public class TestTheories {8 public static int INT_PARAM_1 = 5;9 public static int INT_PARAM_2 = 10;10 public static String STRING_PARAM_1 = "Hello";11 public static String STRING_PARAM_2 = "World";12 public void testTheory(int i, String s) {13 System.out.println("i=" + i + ", s=" + s);14 }15}
Theories
Using AI Code Generation
1package com.javacodegeeks.junit;2import static org.junit.Assert.assertEquals;3import static org.junit.Assert.assertTrue;4import static org.junit.Assume.assumeTrue;5import java.util.Arrays;6import java.util.List;7import org.junit.Before;8import org.junit.Test;9import org.junit.experimental.theories.DataPoint;10import org.junit.experimental.theories.DataPoints;11import org.junit.experimental.theories.Theories;12import org.junit.experimental.theories.Theory;13import org.junit.runner.RunWith;14@RunWith(Theories.class)15public class TheoriesTest {16 private List<Integer> list;17 public void setUp() {18 list = Arrays.asList(1, 2, 3);19 }20 public static int INT1 = 1;21 public static int INT2 = 2;22 public static int INT3 = 3;23 public void testTheory(int value) {24 assertTrue(list.contains(value));25 }26 public static int[] INT_ARRAY = { 1, 2, 3 };27 public void testTheoryWithArray(int value) {28 assertTrue(list.contains(value));29 }30 public static int[] INT_ARRAY1 = { 1, 2, 3 };31 public static int[] INT_ARRAY2 = { 4, 5, 6 };32 public void testTheoryWithMultipleArrays(int value) {33 assertTrue(list.contains(value));34 }35 public static int[] INT_ARRAY1 = { 1, 2, 3 };36 public static int[] INT_ARRAY2 = { 4, 5, 6 };37 public void testTheoryWithMultipleArrays(int value) {38 assertTrue(list.contains(value));39 }40 public static int[] INT_ARRAY1 = { 1, 2, 3 };41 public static int[] INT_ARRAY2 = { 4, 5, 6 };42 public void testTheoryWithMultipleArrays(int value) {43 assertTrue(list.contains(value));44 }45 public static int[] INT_ARRAY1 = { 1, 2, 3 };
Theories
Using AI Code Generation
1public class TheoriesTest {2 public static int[] data() {3 return new int[]{1, 2, 3};4 }5 public void testMultiply(int n) {6 assertTrue(n * n > 0);7 }8}9import spock.lang.Specification10import org.junit.experimental.theories.DataPoints11import org.junit.experimental.theories.Theories12import org.junit.experimental.theories.Theory13import org.junit.experimental.theories.DataPoint14class TheoriesTest extends Specification {15 void testMultiply(int n) {16 }17}
Theories
Using AI Code Generation
1public class TestClass {2 public static String[] data = {"", "a", "ab", "abc"};3 public void testTheory(String s) {4 System.out.println("s = " + s);5 }6}7[INFO] --- maven-surefire-plugin:2.22.0:test (default-test) @ junit-theories-example ---8@RunWith(Theories.class)9public class TestClass {10}
Theories
Using AI Code Generation
1public class TestJunit {2 public void testMethod(int x, int y) {3 assertTrue(x + y == y + x);4 }5}6public Theories.ParameterSupplier dataPointSupplier(ParameterSupplier supplier) method7public Theories.ParameterSupplier dataPoints(String name, Object... dataPoints) method8public Theories.ParameterSupplier dataPoints(String name, Object[] firstDataPoints, Object[]... moreDataPoints) method9The dataPointSupplier(ParameterSupplier supplier) method is used to define the values of the parameters using a custom parameter supplier. The dataPoints(String name, Object... dataPoints) method is used to define the values of the parameters using an array of objects. The dataPoints(String name, Object[] firstDataPoints, Object[]... moreDataPoints) method
116797:M 03 Aug 2020 09:11:11.246 # Error accepting a client connection: (null)2
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
Meaning of delta or epsilon argument of assertEquals for double values
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
.
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