JSONPath assertions — Structured output queries

[sleipi]

Requested

Add json query type for asserting structured JSON output.

Example

curl -s http://localhost/api/users
EXIT 0
[Asserts]
stdout.json $.items[0].name equals "foo"
stdout.json $.count greaterThan 0
stdout.json $.items length 3

Open questions

• JSONPath library? (e.g. github.com/ohler55/ojg, github.com/PaesslerAG/jsonpath)
• Syntax: stdout.json <path> or json <path> as query?
• Which predicates make sense? (equals, contains, greaterThan, length, exists)
• Support for stderr.json?
• What about nested arrays/objects as expected value?