def test_is_single_symbol(self):
# Signature: name(cls, expr)
# Returns ``True`` if the expression is a single symbol, possibly
# surrounded with white-spaces
#
# >>> is_single_symbol('hello')
# True
#
# >>> is_single_symbol('hello * world')
# False
self.assertTrue(MathUtil.is_single_symbol('t'))
self.assertTrue(MathUtil.is_single_symbol('var_1'))
self.assertTrue(MathUtil.is_single_symbol('var_long_name'))
self.assertTrue(MathUtil.is_single_symbol('_myName'))
self.assertFalse(MathUtil.is_single_symbol('r + y'))
self.assertFalse(MathUtil.is_single_symbol('r+y'))
self.assertFalse(MathUtil.is_single_symbol('sin(y)'))
