func TestReturnError_WhenInputIs_Minus111(t *testing.T) {
message := "Left operand value could not less than 0"
_, err := captcha.New(-1, 1, 1)
if err.Error() != message {
t.Errorf("Expected %v but got nothing", message)
}
}
func TestLeftOperandShouldEquals_1_WhenInputIs_111(t *testing.T) {
c, _ := captcha.New(1, 1, 1)
lo := c.LeftOperand()
if lo != "1" {
t.Errorf("Expected %v but got %v", 1, lo)
}
}
func TestReturnError_WhenInputIs_1011(t *testing.T) {
message := "Left operand value could not greater than 9"
_, err := captcha.New(10, 1, 1)
if err.Error() != message {
t.Errorf("Expected %v but got nothing", message)
}
}