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JSON Formatter — Testing

$ cd app && go test ./internal/tools/jsonformat/... -v
=== RUN   TestFormat
--- PASS: TestFormat (0.00s)
    --- PASS: TestFormat/pretty_default_indent
    --- PASS: TestFormat/pretty_custom_indent
    --- PASS: TestFormat/minify
    --- PASS: TestFormat/minify_idempotent
    --- PASS: TestFormat/empty_input
    --- PASS: TestFormat/malformed_json
PASS

Covers REST/CLI usage of jsonformat.Format (pretty/minify, custom indent, empty input, malformed JSON).

Web UI verification (manual/scripted, no Go test coverage)

The web page (internal/web/templates/tools/json-format.html) runs entirely client-side via native JSON.parse()/JSON.stringify() and never calls Format or the REST endpoint, so it isn't exercised by go test. Verified instead with a real browser (Playwright driving the actual binary):

  • Typing in the input textarea triggers zero POST /api/v1/tools/json-format calls (confirms Validate/Beautify/Minify never hit the network).
  • "Validate JSON" on valid input shows the green success banner ("Valid JSON.") and leaves the output field untouched.
  • "Validate JSON" on invalid input (e.g. {"a":}) shows the browser's own JSON.parse() error message in the red error banner.
  • "Beautify" on valid input fills the output with 2-space-indented JSON; on invalid input, clears the output and shows the error banner.
  • "Minify" on valid input fills the output with whitespace-free JSON.
  • "Copy Output" copies the output field to the clipboard.
  • "Clear" empties both fields and hides any banner.

Re-run this check whenever json-format.html changes.