
import unittest
import user_code
import ast
import re   
import unittest
import importlib
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
import sys
import types

class TestTask(unittest.TestCase):
    def setUp(self):
        # Patch plt.show to prevent actual plot display
        self._original_show = plt.show
        plt.show = lambda: None
        import user_code
        importlib.reload(user_code)

    def tearDown(self):
        plt.show = self._original_show
        plt.clf()

    def test_bar_chart_seven_bars(self):
        import user_code
        plt.clf()
        expenses = [10, 20, 30, 40, 50, 60, 70]
        user_code.plot_weekly_spending(expenses)
        bars = [child for child in plt.gca().get_children() if isinstance(child, matplotlib.patches.Rectangle)]
        # The first bar is the background, so skip it
        bar_count = len([b for b in bars if b.get_x() != 0 or b.get_y() != 0 or b.get_width() != 1 or b.get_height() != 1])
        _dynamic_test(
            self,
            bar_count == 7,
            "Bar chart has 7 bars for 7 days of the week",
            f"Expected 7 bars, found {bar_count} bars."
        )

    def test_x_axis_label(self):
        import user_code
        plt.clf()
        user_code.plot_weekly_spending([1,2,3,4,5,6,7])
        xlabel = plt.gca().get_xlabel()
        _dynamic_test(
            self,
            xlabel == "Day of the Week",
            "X-axis label is correctly set to 'Day of the Week'",
            f"Expected x-axis label 'Day of the Week', got '{xlabel}'"
        )

    def test_y_axis_label(self):
        import user_code
        plt.clf()
        user_code.plot_weekly_spending([1,2,3,4,5,6,7])
        ylabel = plt.gca().get_ylabel()
        _dynamic_test(
            self,
            ylabel == "Amount Spent ($)",
            "Y-axis label is correctly set to 'Amount Spent ($)'",
            f"Expected y-axis label 'Amount Spent ($)', got '{ylabel}'"
        )

    def test_chart_title(self):
        import user_code
        plt.clf()
        user_code.plot_weekly_spending([1,2,3,4,5,6,7])
        title = plt.gca().get_title()
        _dynamic_test(
            self,
            title == "Weekly Spending Overview",
            "Chart title is correctly set to 'Weekly Spending Overview'",
            f"Expected chart title 'Weekly Spending Overview', got '{title}'"
        )

    def test_expenses_order(self):
        import user_code
        plt.clf()
        test_expenses = [11, 22, 33, 44, 55, 66, 77]
        user_code.plot_weekly_spending(test_expenses)
        bars = [child for child in plt.gca().get_children() if isinstance(child, matplotlib.patches.Rectangle)]
        # Filter out the background rectangle (patch)
        filtered_bars = [b for b in bars if b.get_x() != 0 or b.get_y() != 0 or b.get_width() != 1 or b.get_height() != 1]
        heights = [b.get_height() for b in filtered_bars]
        _dynamic_test(
            self,
            heights == test_expenses,
            "Bar heights match the expenses in the order given",
            f"Expected bar heights {test_expenses}, got {heights}"
        )

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: Visualize Your Weekly Spending

解答