
import unittest
import user_code
import ast
import re   
import importlib
import csv
import unittest
import importlib
import io
from contextlib import redirect_stdout

class TestTask(unittest.TestCase):
    def setUp(self):
        self.module_name = "user_code"
        self.test_cases = [
            {"name": "Test Addition", "expected": 5, "actual": 2 + 3},
            {"name": "Test Subtraction", "expected": 3, "actual": 5 - 2},
            {"name": "Test Multiplication", "expected": 9, "actual": 3 * 3},
            {"name": "Test Division", "expected": 2, "actual": 10 // 5},
            {"name": "Test Failure", "expected": 4, "actual": 2 * 2 + 1}
        ]

    def test_each_test_case_pass_fail_recorded(self):
        import user_code
        importlib.reload(user_code)
        # Patch print to capture output
        f = io.StringIO()
        with redirect_stdout(f):
            user_code.run_test_suite(self.test_cases)
        output = f.getvalue()
        # Check that each test case has PASS/FAIL line
        for test in self.test_cases:
            expected = test["expected"]
            actual = test["actual"]
            status = "PASS" if actual == expected else "FAIL"
            line = f"{test['name']}: {status}"
            _dynamic_test(
                self,
                line in output,
                f"Test '{test['name']}' correctly records {status}",
                f"Test '{test['name']}' missing or wrong status line. Output: {output}",
            )

    def test_summary_counts_correct(self):
        import user_code
        importlib.reload(user_code)
        f = io.StringIO()
        with redirect_stdout(f):
            user_code.run_test_suite(self.test_cases)
        output = f.getvalue()
        total = len(self.test_cases)
        passed = sum(1 for t in self.test_cases if t["actual"] == t["expected"])
        failed = total - passed
        _dynamic_test(
            self,
            f"Total: {total}" in output,
            "Summary includes correct total count",
            f"Summary missing or wrong total count. Output: {output}",
        )
        _dynamic_test(
            self,
            f"Passed: {passed}" in output,
            "Summary includes correct passed count",
            f"Summary missing or wrong passed count. Output: {output}",
        )
        _dynamic_test(
            self,
            f"Failed: {failed}" in output,
            "Summary includes correct failed count",
            f"Summary missing or wrong failed count. Output: {output}",
        )

    def test_pass_fail_logic(self):
        import user_code
        importlib.reload(user_code)
        # Test with custom cases
        cases = [
            {"name": "All Pass", "expected": 1, "actual": 1},
            {"name": "All Fail", "expected": 2, "actual": 3},
        ]
        f = io.StringIO()
        with redirect_stdout(f):
            user_code.run_test_suite(cases)
        output = f.getvalue()
        _dynamic_test(
            self,
            "All Pass: PASS" in output and "All Fail: FAIL" in output,
            "Function correctly distinguishes pass/fail for custom cases",
            f"Output missing correct pass/fail for custom cases. Output: {output}",
        )

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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