TriangleChecker/test/TriangleCheckerTest.java

import org.junit.Test;
import static org.junit.Assert.*;

public class TriangleCheckerTest {
    
    @Test
    public void testValidTriangle() {

        // Arrange
        float a = 2;
        float b = 3;
        float c = 4;

        // Act
        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);

        // Assert
        assertEquals(TriangleChecker.TriangleType.NORMAL, type);

    }
    @Test
    public void testEquilateralTriangle() {

        // Arrange
        float a = 2;
        float b = 2;
        float c = 2;

        // Act
        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);

        // Assert
        assertEquals(TriangleChecker.TriangleType.EQUILATERAL, type);

    }

    @Test
    public void testIsoscelesTriangle() {

        // Arrange
        float a = 2;
        float b = 2;
        float c = 3;

        float d = 3;
        float e = 2;
        float f = 2;

        float g = 2;
        float h = 3;
        float i = 2;

        // Act
        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
        TriangleChecker.TriangleType typeOne = TriangleChecker.checkTriangle(d, e, f);
        TriangleChecker.TriangleType typeTwo = TriangleChecker.checkTriangle(g, h, i);

        // Assert
        assertEquals(TriangleChecker.TriangleType.ISOSCELES, type);
        assertEquals(TriangleChecker.TriangleType.ISOSCELES, typeOne);
        assertEquals(TriangleChecker.TriangleType.ISOSCELES, typeTwo);

    }
    @Test
    public void testNoTriangle() {

        // Arrange
        float a = 3; //überlange Seite
        float b = 1;
        float c = 1;

        float d = 0;
        float e = 1;
        float f = 0;

        float g = -1;//negative Zahlen
        float h = -1;
        float i = -1;

        float j = 4;
        float k = 8;
        float l = 12;

        float m =  3;
        float n =  0;
        float o =  4;

        float p =  3;
        float q = -5;
        float r =  4;


        // Act
        TriangleChecker.TriangleType caseOne = TriangleChecker.checkTriangle(a, b, c);
        TriangleChecker.TriangleType caseTwo = TriangleChecker.checkTriangle(d, e, f);
        TriangleChecker.TriangleType caseThree = TriangleChecker.checkTriangle(g, h, i);
        TriangleChecker.TriangleType caseFour = TriangleChecker.checkTriangle(j, k, l);
        TriangleChecker.TriangleType caseFive = TriangleChecker.checkTriangle(m,n,o);
        TriangleChecker.TriangleType caseSix = TriangleChecker.checkTriangle(p, q, r);

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, caseOne);
        assertEquals(TriangleChecker.TriangleType.NONE, caseTwo);
        assertEquals(TriangleChecker.TriangleType.NONE, caseThree);
        assertEquals(TriangleChecker.TriangleType.NONE, caseFour);
        assertEquals(TriangleChecker.TriangleType.NONE, caseFive);
        assertEquals(TriangleChecker.TriangleType.NONE, caseSix);
    }

}