def testInvalidInput(self):
"""
Validation of an input
"""
self.assertEqual(classify_triangle(2, 2, -3), 'not valid')
self.assertEqual(classify_triangle('a', '2', 3), 'not valid')
def testRightTriangle(self):
"""
cheching for right angle and display the type of a triangle
"""
self.assertEqual(classify_triangle(1, 1, 1.414213),
'isosceles and right')
self.assertEqual(classify_triangle(3, 4, 5), 'scalene and right')
def testScaleneTriangle(self):
"""
check for scalene
"""
self.assertEqual(classify_triangle(4, 5, 6), 'scalene')
def testIsoscelesTriangle(self):
"""
check for Isosceles
"""
self.assertEqual(classify_triangle(2, 2, 3), 'isosceles')
def testEquilateralTriangle(self):
"""
check for equilateral
"""
self.assertEqual(classify_triangle(1, 1, 1), 'equilateral')
def testInvalidTriangle(self):
"""
to see that the input satisfy the condition to be a triangle
"""
self.assertEqual(classify_triangle(1, 2, 3), 'not valid')