Flask中HTTP PUT方法断言失败求助：8个测试用例仅第8个未通过

Looks like your PUT endpoint isn't returning the full blog object including the article_text field, which is why test case 8 is failing. Let's break down the issue and fix it step by step.

First, let's analyze the error #

The test expects to find the article_text in the response data, but your API is only returning:

{"1": {"title": "PYTHON APPLICATION PROGRAMMING"}}

This points to two likely issues:

• Your PUT route isn't updating the article_text in your data store (like an in-memory dict or database)
• Even if it is updating the field, you're not including article_text in the JSON response you send back.

Step 1: Check your PUT route in blogs_app.py #

Chances are your current PUT handler looks something like this (the problematic version):

@app.route('/blogs/<int:blog_id>', methods=['PUT'])
def update_blog(blog_id):
    # Assume 'blogs' is your in-memory storage
    if blog_id not in blogs:
        return jsonify({"error": "Blog not found"}), 404
    
    update_data = request.get_json()
    # Only updating the title, ignoring article_text
    if "title" in update_data:
        blogs[blog_id]["title"] = update_data["title"]
    
    # Only returning the title, not the full blog object
    return jsonify({blog_id: {"title": blogs[blog_id]["title"]}})

Step 2: Fix the PUT route #

You need to make two key changes:

1. Handle the article_text field from the incoming request
2. Return the full updated blog object (not just the title)

Here's the corrected version:

@app.route('/blogs/<int:blog_id>', methods=['PUT'])
def update_blog(blog_id):
    if blog_id not in blogs:
        return jsonify({"error": "Blog not found"}), 404
    
    update_data = request.get_json()
    # Update title if provided
    if "title" in update_data:
        blogs[blog_id]["title"] = update_data["title"]
    # Update article_text if provided
    if "article_text" in update_data:
        blogs[blog_id]["article_text"] = update_data["article_text"]
    
    # Return the entire updated blog entry
    return jsonify({blog_id: blogs[blog_id]})

Step 3: Verify the test case request #

Double-check test_app.py's test case 8 to make sure it's actually sending the article_text in the PUT request body. It should look like this:

def test_blogs_api_case8(self):
    target_url = '/blogs/1'
    payload = {
        "title": "PYTHON APPLICATION PROGRAMMING",
        "article_text": "This article talks about Python and illustrates how Python is used in application programming, with examples."
    }
    response = self.client.put(target_url, json=payload)
    # The assertion that was failing
    self.assertIn(b'"article_text": "This article talks about Python and illustrates how Python is used in application programming, with examples."', response.data)

If the test wasn't sending article_text, even a fixed endpoint wouldn't return it—so confirm this part is correct too.

After making these changes, re-run your tests, and test case 8 should pass since the response will now include the full blog object with both title and article_text.

内容的提问来源于stack exchange，提问作者Ashwin Kumar