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BAEL-6849 Junit Tests for Interfaces in Java (#14847) 

* BAEL-6849 Junit Tests for Interfaces in Java

* BAEL-6849 Junit Tests for Interfaces in Java

* BAEL-6849 Junit Tests for Interfaces in Java

* BAEL-6849 JUnit Tests for Interfaces in Java
This commit is contained in:
brokenhardisk 2023-10-02 07:03:58 +02:00 committed by GitHub
parent d1aa92f178
commit 071d0ca2e9
9 changed files with 190 additions and 0 deletions
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19
testing-modules/junit-5-advanced/src/main/java/com/baeldung/interfaces/unittest/Circle.java Normal file
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package com.baeldung.interfaces.unittest;
public class Circle implements Shape {
private double radius;
Circle(double radius) {
this.radius = radius;
}
@Override
public double area() {
return 3.14 * radius * radius;
}
public double circumference() {
return 2 * 3.14 * radius;
}
}

21
testing-modules/junit-5-advanced/src/main/java/com/baeldung/interfaces/unittest/Rectangle.java Normal file
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package com.baeldung.interfaces.unittest;
public class Rectangle implements Shape {
private double length;
private double breadth;
public Rectangle(double length, double breadth) {
this.length = length;
this.breadth = breadth;
}
@Override
public double area() {
return length * breadth;
}
public double perimeter() {
return 2 * (length + breadth);
}
}

6
testing-modules/junit-5-advanced/src/main/java/com/baeldung/interfaces/unittest/Shape.java Normal file
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package com.baeldung.interfaces.unittest;
public interface Shape {
double area();
}

26
testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/CircleExtendsBaseUnitTest.java Normal file
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package com.baeldung.interfaces.unittest;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.HashMap;
import java.util.Map;
import org.junit.jupiter.api.Test;
class CircleExtendsBaseUnitTest extends ShapeUnitTest {
@Override
public Map<String, Object> instantiateShapeWithExpectedArea() {
Map<String, Object> shapeAreaMap = new HashMap<>();
shapeAreaMap.put("shape", new Circle(5));
shapeAreaMap.put("area", 78.5);
return shapeAreaMap;
}
@Test
void whenCircumferenceIsCalculated_thenSuccessful() {
Circle circle = new Circle(2);
double circumference = circle.circumference();
assertEquals(12.56, circumference);
}
}

22
testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/CircleUnitTest.java Normal file
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package com.baeldung.interfaces.unittest;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
class CircleUnitTest {
@Test
void whenAreaIsCalculated_thenSuccessful() {
Shape circle = new Circle(5);
double area = circle.area();
assertEquals(78.5, area);
}
@Test
void whenCircumferenceIsCalculated_thenSuccessful() {
Circle circle = new Circle(2);
double circumference = circle.circumference();
assertEquals(12.56, circumference);
}
}

27
testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/ParameterizedUnitTest.java Normal file
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package com.baeldung.interfaces.unittest;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.Arrays;
import java.util.Collection;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
public class ParameterizedUnitTest {
@ParameterizedTest
@MethodSource("data")
void givenShapeInstance_whenAreaIsCalculated_thenSuccessful(Shape shapeInstance, double expectedArea) {
double area = shapeInstance.area();
assertEquals(expectedArea, area);
}
private static Collection<Object[]> data() {
return Arrays.asList(new Object[][] {
{ new Circle(5), 78.5 },
{ new Rectangle(4, 5), 20 }
});
}
}

26
testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/RectangleExtendsBaseUnitTest.java Normal file
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package com.baeldung.interfaces.unittest;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.HashMap;
import java.util.Map;
import org.junit.jupiter.api.Test;
class RectangleExtendsBaseUnitTest extends ShapeUnitTest {
@Override
public Map<String, Object> instantiateShapeWithExpectedArea() {
Map<String, Object> shapeAreaMap = new HashMap<>();
shapeAreaMap.put("shape", new Rectangle(5, 4));
shapeAreaMap.put("area", 20.0);
return shapeAreaMap;
}
@Test
void whenPerimeterIsCalculated_thenSuccessful() {
Rectangle rectangle = new Rectangle(5, 4);
double perimeter = rectangle.perimeter();
assertEquals(18, perimeter);
}
}

22
testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/RectangleUnitTest.java Normal file
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package com.baeldung.interfaces.unittest;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
class RectangleUnitTest {
@Test
void whenAreaIsCalculated_thenSuccessful() {
Shape rectangle = new Rectangle(5, 4);
double area = rectangle.area();
assertEquals(20, area);
}
@Test
void whenPerimeterIsCalculated_thenSuccessful() {
Rectangle rectangle = new Rectangle(5, 4);
double perimeter = rectangle.perimeter();
assertEquals(18, perimeter);
}
}

21
testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/ShapeUnitTest.java Normal file
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package com.baeldung.interfaces.unittest;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.Map;
import org.junit.jupiter.api.Test;
public abstract class ShapeUnitTest {
public abstract Map<String, Object> instantiateShapeWithExpectedArea();
@Test
void givenShapeInstance_whenAreaIsCalculated_thenSuccessful() {
Map<String, Object> shapeAreaMap = instantiateShapeWithExpectedArea();
Shape shape = (Shape) shapeAreaMap.get("shape");
double expectedArea = (double) shapeAreaMap.get("area");
double area = shape.area();
assertEquals(expectedArea, area);
}
}