import org.junit.Test; import static org.junit.Assert.*; public class TriangleCheckerTest { @Test public void testValidTriangle() { // 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); } }