KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use Annotation Type DataPoints class of org.junit.experimental.theories package

Best junit code snippet using org.junit.experimental.theories.Annotation Type DataPoints

Source:DataPoints.java

1package org.junit.experimental.theories;2import static java.lang.annotation.ElementType.FIELD;3import static java.lang.annotation.ElementType.METHOD;4import java.lang.annotation.Retention;5import java.lang.annotation.RetentionPolicy;6import java.lang.annotation.Target;7/**8 * Annotating an array or iterable-typed field or method with &#064;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>&#064;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 &#064;FromDataPoints}20 * annotation.21 * <p>22 * Parameters with no specified source (i.e. without &#064;FromDataPoints or23 * other {@link org.junit.experimental.theories.ParametersSuppliedBy24 * &#064;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 * &#064;DataPoints37 * public static String[] dataPoints = new String[] { ... };38 * 39 * &#064;DataPoints40 * public static String[] generatedDataPoints() {41 *     return new String[] { ... };42 * }43 * 44 * &#064;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: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 * &#064;Theory} method with <code>&#064;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 * &#064;DataPoints annotation.14 * <p>15 * DataPoints without names will not be considered as values for any parameters16 * annotated with &#064;FromDataPoints.17 * <pre>18 * &#064;DataPoints19 * public static String[] unnamed = new String[] { ... };20 * 21 * &#064;DataPoints("regexes")22 * public static String[] regexStrings = new String[] { ... };23 * 24 * &#064;DataPoints({"forMatching", "alphanumeric"})25 * public static String[] testStrings = new String[] { ... }; 26 * 27 * &#064;Theory28 * public void stringTheory(String param) {29 *     // This will be called with every value in 'regexStrings',30 *     // 'testStrings' and 'unnamed'.31 * }32 * 33 * &#064;Theory34 * public void regexTheory(&#064;FromDataPoints("regexes") String regex,35 *                         &#064;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}...

Annotation Type DataPoints

Using AI Code Generation

1import org.junit.experimental.theories.DataPoints;2import org.junit.experimental.theories.Theories;3import org.junit.experimental.theories.Theory;4import org.junit.runner.RunWith;5@RunWith(Theories.class)6public class TheoryTest {7    public static int[] data() {8        return new int[] { 1, 2, 3 };9    }10    public void test(int value) {11        System.out.println(value);12    }13}

Annotation Type DataPoints

Using AI Code Generation

1import org.junit.experimental.theories.DataPoints; 2import org.junit.experimental.theories.Theory; 3import org.junit.runner.RunWith; 4import org.junit.runners.Theories; 5import org.junit.runners.model.TestClass;6@RunWith(Theories.class) 7public class TestClassExample { 8   public static int[] data() { 9      return new int[] { 1, 2, 3 }; 10   } 11   public void test(int x) { 12      System.out.println("x = " + x); 13   } 14}

Annotation Type DataPoints

Using AI Code Generation

1public class DataPoint {2    public static int[] intArray = {1, 2, 3, 4, 5};3}4public class DataPoint {5    public static int int1 = 1;6    public static int int2 = 2;7    public static int int3 = 3;8    public static int int4 = 4;9    public static int int5 = 5;10}11public class Theory {12    public void testTheory(int i) {13        System.out.println("i = " + i);14    }15}16public class Theories {17    @RunWith(Theories.class)18    public class TheoriesTest {19        public static int[] intArray = {1, 2, 3, 4, 5};20        public void testTheory(int i) {21            System.out.println("i = " + i);22        }23    }24}25public class Theory {26    public void testTheory(int i, int j) {27        System.out.println("i = " + i + ", j = " + j);28    }29}30public class Theories {31    @RunWith(Theories.class)32    public class TheoriesTest {33        public static int[] intArray = {1, 2, 3, 4, 5};34        public void testTheory(int i, int j) {35            System.out.println("i = " + i + ", j = " + j);36        }37    }38}39public class Theory {40    public void testTheory(int i, int j, int k) {41        System.out.println("i = " + i + ", j = " + j + ", k = " + k);42    }

Annotation Type DataPoints

Using AI Code Generation

1@RunWith(Theories.class)2public class DataPointsTest {3    public static int[] data() {4        return new int[]{1, 2, 3};5    }6    public static Integer[] data2() {7        return new Integer[]{1, 2, 3};8    }9    public static String[] data3() {10        return new String[]{"a", "b", "c"};11    }12    public static int[] data4() {13        return new int[]{1, 2, 3};14    }15    public static int[] data5() {16        return new int[]{1, 2, 3};17    }18    public void test1(int a, int b, int c) {19        System.out.println("a = " + a + ", b = " + b + ", c = " + c);20    }21}

Source: List of annotations in JUnit

1@JsonInclude(JsonInclude.Include.NON_NULL)2@Data3public class Person {4   String id;5   String first;6   String last;7}8

Source: JUnit & warning exporting non public type through public api

1if (_cfgConstructorPropertiesImpliesCreator2            && config.isEnabled(MapperFeature.INFER_CREATOR_FROM_CONSTRUCTOR_PROPERTIES)3

Source:JUnit & warning exporting non public type through public api

if (_cfgConstructorPropertiesImpliesCreator
            && config.isEnabled(MapperFeature.INFER_CREATOR_FROM_CONSTRUCTOR_PROPERTIES)

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

JUnit Tutorial Chapters:

Here are the detailed JUnit testing chapters to help you get started:

Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
Top Java Unit testing frameworks - Here are the upcoming JUnit automation testing frameworks that you can use in 2023 to boost your unit testing.
What is the JUnit framework
Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
JUnit 5 vs. JUnit 4: Differences - Here is a complete comparison between JUnit 5 and JUnit 4 testing frameworks.
Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.