
import unittest
import user_code
import ast
import re   
import importlib
import csv
import unittest
import importlib

class TestTask(unittest.TestCase):
    def test_return_structure(self):
        import user_code
        importlib.reload(user_code)
        log_data = """
2024-07-01 10:00:01 INFO System started successfully
2024-07-01 10:01:15 WARNING Disk usage at 85%
2024-07-01 10:02:22 ERROR Failed to connect to database
2024-07-01 10:03:30 INFO User logged in: admin
2024-07-01 10:04:05 ERROR Timeout while waiting for response
2024-07-01 10:05:10 WARNING High memory usage detected
2024-07-01 10:06:12 INFO Scheduled backup completed
2024-07-01 10:07:19 ERROR Unable to write to log file
"""
        result = user_code.parse_log(log_data)
        _dynamic_test(
            self,
            isinstance(result, tuple) and len(result) == 4,
            "Function returns a tuple with four elements",
            f"Expected tuple of length 4, got {type(result)} with length {len(result) if isinstance(result, tuple) else 'N/A'}",
        )

    def test_error_lines_content(self):
        import user_code
        importlib.reload(user_code)
        log_data = """
2024-07-01 10:00:01 INFO System started successfully
2024-07-01 10:01:15 WARNING Disk usage at 85%
2024-07-01 10:02:22 ERROR Failed to connect to database
2024-07-01 10:03:30 INFO User logged in: admin
2024-07-01 10:04:05 ERROR Timeout while waiting for response
2024-07-01 10:05:10 WARNING High memory usage detected
2024-07-01 10:06:12 INFO Scheduled backup completed
2024-07-01 10:07:19 ERROR Unable to write to log file
"""
        expected_errors = [
            "2024-07-01 10:02:22 ERROR Failed to connect to database",
            "2024-07-01 10:04:05 ERROR Timeout while waiting for response",
            "2024-07-01 10:07:19 ERROR Unable to write to log file",
        ]
        result = user_code.parse_log(log_data)
        _dynamic_test(
            self,
            result is not None and isinstance(result, tuple) and isinstance(result[3], list),
            "Fourth element is a list of error lines",
            "Fourth element of return value is not a list of error lines",
        )
        _dynamic_test(
            self,
            result[3] == expected_errors,
            "List of error lines matches expected output",
            f"Expected error lines: {expected_errors}, got: {result[3]}",
        )

    def test_counts_are_correct(self):
        import user_code
        importlib.reload(user_code)
        log_data = """
2024-07-01 10:00:01 INFO System started successfully
2024-07-01 10:01:15 WARNING Disk usage at 85%
2024-07-01 10:02:22 ERROR Failed to connect to database
2024-07-01 10:03:30 INFO User logged in: admin
2024-07-01 10:04:05 ERROR Timeout while waiting for response
2024-07-01 10:05:10 WARNING High memory usage detected
2024-07-01 10:06:12 INFO Scheduled backup completed
2024-07-01 10:07:19 ERROR Unable to write to log file
"""
        result = user_code.parse_log(log_data)
        _dynamic_test(
            self,
            result is not None and result[0] == 3 and result[1] == 2 and result[2] == 3,
            "Counts for ERROR, WARNING, and INFO are correct",
            f"Expected ERROR=3, WARNING=2, INFO=3, got ERROR={result[0]}, WARNING={result[1]}, INFO={result[2]}",
        )

    def test_empty_log(self):
        import user_code
        importlib.reload(user_code)
        log_data = """"""
        result = user_code.parse_log(log_data)
        _dynamic_test(
            self,
            result is not None and result[0] == 0 and result[1] == 0 and result[2] == 0 and result[3] == [],
            "Handles empty log correctly",
            f"Expected (0, 0, 0, []), got {result}",
        )

def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)

def normalize_text(text):
    text = text.lower()
    text = re.sub(r"\\s{2,}", " ", text)
    text = re.sub(r"\\s*([,:?])\\s*", r"\\1 ", text)
    return text.strip()

def change_var(code: str, var_name: str, value: str) -> str:
    tree = ast.parse(code)
    lines = code.splitlines()
    changed = False
    # Collect all assignment nodes to modify
    assign_nodes = [
        (i, node)
        for i, node in enumerate(tree.body)
        if isinstance(node, ast.Assign)
        and any(isinstance(target, ast.Name) and target.id == var_name for target in node.targets)
    ]

    # If nothing to change, return unmodified code
    if not assign_nodes:
        return code

    # Perform replacements for all matching assignments (from last to first to not break line offsets)
    for i, node in reversed(assign_nodes):
        start_line = node.lineno - 1
        line = lines[start_line]
        indent = ' ' * (len(line) - len(line.lstrip()))
        lines[start_line] = f"{indent}{var_name} = {value}"
        next_line = len(lines)
        for next_node in tree.body[i+1:]:
            if hasattr(next_node, 'lineno'):
                next_line = next_node.lineno - 1
                break
        if next_line > start_line + 1:
            lines[start_line+1:next_line] = []
        changed = True

    return '\\n'.join(lines) if changed else code

if __name__ == "__main__":
    unittest.main()


test_main.py

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Challenge: Parse and Summarize Log Data

Solution