add starter logic to generate_log.py and update test_generate_log.py to match spec

Author: viewsdevelop

.canvas/lesson.md

@@ -0,0 +1,19 @@
+from datetime import datetime
+import os
+
+def generate_log(data):
+    # TODO: Implement log generation logic
+
+    # STEP 1: Validate input
+    # Hint: Check if data is a list
+
+    # STEP 2: Generate a filename with today's date (e.g., "log_20250408.txt")
+    # Hint: Use datetime.now().strftime("%Y%m%d")
+
+    # STEP 3: Write the log entries to a file using File I/O
+    # Use a with open() block and write each line from the data list
+    # Example: file.write(f"{entry}\n")
+
+    # STEP 4: Print a confirmation message with the filename
+
+    pass

lib/generate_log.py

@@ -0,0 +1,45 @@
+# testing/test_generate_log.py
+
+import os
+import pytest
+from datetime import datetime
+from lib.generate_log import generate_log
+
+@pytest.fixture
+def log_data():
+    return ["Entry one", "Entry two", "Entry three"]
+
+@pytest.fixture
+def generated_file(log_data):
+    filename = generate_log(log_data)
+    yield filename
+    if os.path.exists(filename):
+        os.remove(filename)
+
+def test_log_file_created(generated_file):
+    """Test that the log file is created with today's date in the filename."""
+    assert os.path.exists(generated_file), f"{generated_file} not found."
+
+def test_log_file_name_format(generated_file):
+    """Test that the filename follows the expected naming convention."""
+    today = datetime.now().strftime("%Y%m%d")
+    assert generated_file == f"log_{today}.txt", "Filename does not match expected format."
+
+def test_log_file_content_matches_input(generated_file, log_data):
+    """Test that the content written to the log matches the input list."""
+    with open(generated_file, "r") as file:
+        lines = [line.strip() for line in file.readlines()]
+    assert lines == log_data, "Log file contents do not match input data."
+
+def test_generate_log_raises_error_on_invalid_input():
+    """Test that the function raises a ValueError when input is not a list."""
+    with pytest.raises(ValueError):
+        generate_log("This should be a list")
+
+def test_empty_log_list_creates_empty_file():
+    """Test that passing an empty list still creates an empty log file."""
+    filename = generate_log([])
+    with open(filename, "r") as file:
+        content = file.read()
+    assert content == ""
+    os.remove(filename)