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);

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

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

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, type);

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

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

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, type);

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

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

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, type);

        // Arrange
        a = 2;
        b = 3;
        c = 10;

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

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, type);

        // Arrange
        a = 10;
        b = 3;
        c = 4;

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

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, type);

        // Arrange
        a = 2;
        b = 10;
        c = 4;

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

        // Assert
        assertEquals(TriangleChecker.TriangleType.NONE, type);
    }

    @Test
    public void testIsoTriangle(){
        // Arrange
        float a = 3;
        float b = 3;
        float c = 2;

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

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

    @Test
    public void testEqualTriangle(){
        // Arrange
        float a = 3;
        float b = 3;
        float c = 3;

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

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

}