Discussion on: Day-9 Valid Mountain Array

class Solution:
    def validMountainArray(self, arr: List[int]) -> bool:
        peak_found = False
        for i in range(1, len(arr)):
            if arr[i] == arr[i-1]:
                return False
            if arr[i] < arr[i-1]:
                if peak_found == False:
                    if i == 1:
                        return False
                    else:
                        peak_found = True
            else:
                if peak_found == True:
                    return False
        return peak_found

if __name__ == "__main__":

    solution = Solution()

    test_case = [0, 2, 3, 4, 5, 2, 1, 0]
    accepted_result = True
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [0, 2, 3, 3, 5, 2, 1, 0]
    accepted_result = False
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [0, 1, 2, 3, 2, 1]
    accepted_result = True
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [0, 2, 3, 4, 5, 2, 1, 5, 4, 1]
    accepted_result = False
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [0, 2, 3, 4, 5, 2, 1, 3, 2, 1]
    accepted_result = False
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [0, 2, 1]
    accepted_result = True
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [0, 2, 3]
    accepted_result = False
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)

    test_case = [5, 2, 1]
    accepted_result = False
    result = solution.validMountainArray(test_case)
    assert result == accepted_result, (test_case, accepted_result, result)