def test_only_G_and_C():
'''
Sequence of only G's and C's has fraction 1.0
'''
fixture = 'GGCGCCGGC'
result = calculate_gc(fixture)
assert_equal(result, 1.0)
def test_lower_case():
'''
Sequence with lower case letters
'''
fixture = 'atgc'
result = calculate_gc(fixture)
assert_equal(result, 0.5)
def test_half():
'''
Sequence with half G and C has fraction 0.5
'''
fixture = 'ATGC'
result = calculate_gc(fixture)
assert_equal(result, 0.5)
def test_only_G_and_C():
"""
Sequence of only G's and C's has fraction 1.0
"""
fixture = "GGCGCCGGC"
result = calculate_gc(fixture)
assert_equal(result, 1.0)
def test_lower_case():
"""
Sequence with lower case letters
"""
fixture = "atgc"
result = calculate_gc(fixture)
assert_equal(result, 0.5)
def test_half():
"""
Sequence with half G and C has fraction 0.5
"""
fixture = "ATGC"
result = calculate_gc(fixture)
assert_equal(result, 0.5)
