Code:
def minimum_index(seq):
if len(seq) == 0:
raise ValueError("Cannot get the minimum value index from an empty sequence")
min_idx = 0
for i in range(1, len(seq)):
if seq[i] < seq[min_idx]:
min_idx = i
return min_idx
class TestDataEmptyArray():
@staticmethod
def get_array():
return list()
class TestDataUniqueValues():
@staticmethod
def get_array():
return [5, 2, 8, 3, 1, -6, 9]
@staticmethod
def get_expected_result():
return 5
class TestDataExactlyTwoDifferentMinimums():
@staticmethod
def get_array():
return [5, 2, 8, 3, 1, -6, 9, -6, 10]
@staticmethod
def get_expected_result():
return 5
def TestWithEmptyArray():
try:
seq = TestDataEmptyArray.get_array()
result = minimum_index(seq)
except ValueError as e:
pass
else:
assert False
def TestWithUniqueValues():
seq = TestDataUniqueValues.get_array()
assert len(seq) >= 2
assert len(list(set(seq))) == len(seq)
expected_result = TestDataUniqueValues.get_expected_result()
result = minimum_index(seq)
assert result == expected_result
def TestiWithExactyTwoDifferentMinimums():
seq = TestDataExactlyTwoDifferentMinimums.get_array()
assert len(seq) >= 2
tmp = sorted(seq)
assert tmp[0] == tmp[1] and (len(tmp) == 2 or tmp[1] < tmp[2])
expected_result = TestDataExactlyTwoDifferentMinimums.get_expected_result()
result = minimum_index(seq)
assert result == expected_result
TestWithEmptyArray()
TestWithUniqueValues()
TestiWithExactyTwoDifferentMinimums()
print("OK")
