zai-proxy/notes/bf-413h.md

JSON Helper Verification (bf-413h)

Summary

Verified all JSON-related helper functions in proxy/helpers_test.go and their corresponding tests in proxy/response_assertions_test.go. All acceptance criteria met.

Acceptance Criteria Verification

1. AssertJSONBody() validates JSON and returns boolean ✅

Function signature: AssertJSONBody(t *testing.T, resp *http.Response) bool

Test cases verified:

• ✅ Valid JSON objects return true
• ✅ Valid JSON arrays return true
• ✅ Complex nested JSON structures return true
• ✅ Invalid JSON (empty body) triggers error and returns false
• ✅ Invalid JSON (malformed) triggers error and returns false

Test function: TestAssertJSONBody in proxy/response_assertions_test.go (lines 137-203)

2. AssertResponseField() validates specific JSON field values ✅

Function signature: AssertResponseField(t *testing.T, resp *http.Response, field string, expectedValue interface{})

Test cases verified:

• ✅ String field validation with matching values
• ✅ Multiple field checks work correctly
• ✅ Numeric field values (JSON numbers unmarshal to float64)
• ✅ Boolean field values
• ✅ Missing fields trigger errors
• ✅ Field path traversal works correctly

Test function: TestAssertResponseField in proxy/response_assertions_test.go (lines 205-247)

3. ReadResponseBody() reads response body correctly ✅

Function signature: ReadResponseBody(t *testing.T, resp *http.Response) []byte

Test cases verified:

• ✅ Reads non-empty bodies correctly
• ✅ Reads empty bodies (returns empty slice)
• ✅ Reads binary data without corruption
• ✅ Handles large bodies (10KB tested)
• ✅ Preserves JSON body content exactly

Test function: TestReadResponseBody in proxy/response_assertions_test.go (lines 343-409)

4. ReadJSONResponse() parses JSON into map correctly ✅

Function signature: ReadJSONResponse(t *testing.T, resp *http.Response) map[string]interface{}

Test cases verified:

• ✅ Parses simple JSON objects into maps
• ✅ Handles nested JSON objects correctly
• ✅ Parses JSON with various types (string, number, float, bool, null)
• ✅ Handles complex API response structures
• ✅ Numbers unmarshal to float64 correctly
• ✅ Null values handled properly

Test function: TestReadJSONResponse in proxy/response_assertions_test.go (lines 411-484)

Additional Integration Tests

The following integration tests were also verified:

• TestCombinedAssertions (lines 570-624): Verifies multiple assertions work together in realistic API scenarios
• TestHelperFunctionReturnValues (lines 626-675): Validates return value types and behavior

Test Results

All JSON helper tests passed successfully:

--- PASS: TestAssertJSONBody (0.00s)
--- PASS: TestAssertResponseField (0.00s)
--- PASS: TestReadResponseBody (0.00s)
--- PASS: TestReadJSONResponse (0.00s)
--- PASS: TestCombinedAssertions (0.00s)
--- PASS: TestHelperFunctionReturnValues (0.00s)

Error Handling Coverage

The tests verify proper error handling for:

• Invalid JSON syntax (unclosed braces, truncated content)
• Empty response bodies
• Malformed JSON data
• Missing response fields
• Binary data corruption

All error paths correctly call t.Errorf or t.Fatalf with descriptive messages.

Conclusion

All acceptance criteria for bead bf-413h have been verified and met. The JSON helper functions are correctly implemented with comprehensive test coverage.