Spring Boot - Testing Spring Boot Applications
You want to test a controller that returns a list of users as JSON. Which MockMvc assertion verifies the JSON array size is 3?
You want to test a controller that returns a list of users as JSON. Which MockMvc assertion verifies the JSON array size is 3?
hard📝 component behavior Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand jsonPath for array size
To check the size of a JSON array, usejsonPath("$", hasSize(n)).Step 2: Identify correct matcher
hasSize(3)correctly asserts the array length is 3.Final Answer:
Use andExpect(jsonPath("$", hasSize(3))) to verify array size -> Option CQuick Check:
JSON array size check = jsonPath("$", hasSize(n)) [OK]
Quick Trick: Use jsonPath("$", hasSize(n)) to check JSON array length [OK]
Common Mistakes:
- Using length() or count() which are invalid in jsonPath
- Using $.size which is not standard
- Confusing matchers like is() with hasSize()
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