nimcheck/tests/test_jinja_exhaustive.nim

## Jinja validator -- exhaustive edge-case tests.
## Auto-generated. Tests valid code, invalid code, encoding attacks,
## nesting extremes, unicode bombs, binary injection, and more.

import std/[unittest, strutils, strformat, json]
import ../src/nimcheck

proc checkValid(result: ValidationResult, context: string = "") =
  if result.errors.len > 0:
    var msg = &"Expected valid, got {result.errors.len} error(s)"
    if context.len > 0: msg.add(&" [{context}]")
    for e in result.errors: msg.add(&"\n  [{e.code}] {e.message}")
    doAssert false, msg

proc checkInvalid(result: ValidationResult, context: string = "") =
  if result.errors.len == 0:
    doAssert false, &"Expected errors, got none [{context}]"

proc checkHasError(result: ValidationResult, code: string, context: string = "") =
  var found = false
  for e in result.errors:
    if e.code == code: found = true
  if not found:
    var codes: seq[string] = @[]
    for e in result.errors: codes.add(e.code)
    let codesJoined = codes.join(", ")
    doAssert false, "Expected error code '" & code & "', got " & codesJoined & " [" & context & "]"

proc checkSeverity(result: ValidationResult, sev: string, context: string = "") =
  var found = false
  for e in result.errors:
    if $e.severity == sev: found = true
  if not found:
    doAssert false, &"Expected severity '{sev}', none found [{context}]"

suite "Jinja Exhaustive Tests":

  test "basic valid Jinja":
    let src = "{% block body %}<p>{{ content }}</p>{% endblock %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "for loop with else":
    let src = "{% for item in items %}\n  <p>{{ item }}</p>\n{% else %}\n  <p>No items</p>\n{% endfor %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "if-elif-else":
    let src = "{% if x > 5 %}\n  big\n{% elif x > 0 %}\n  positive\n{% else %}\n  small\n{% endif %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "macro definition":
    let src = "{% macro input(name, value='') %}\n  <input name=\"{{ name }}\" value=\"{{ value }}\">\n{% endmacro %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "set and filter":
    let src = "{% set name = 'World' | upper %}\n<p>Hello {{ name }}!</p>\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "raw block":
    let src = "{% raw %}\n  {{ this is not processed }}\n{% endraw %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "include and extends":
    let src = "{% extends \"base.html\" %}\n{% block body %}Body{% endblock %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "unclosed block tag":
    let src = "{% if x %}\n<p>hello\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len > 0

  test "empty source":
    let src = ""
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "Jinja comment":
    let src = "{# this is a comment #}\n<p>visible</p>\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "whitespace control (trim markers)":
    let src = "{% for item in items -%}\n  {{ item }}\n{%- endfor %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "nested Jinja blocks":
    let src = "{% if True %}{% for x in [1,2] %}{{ x }}{% endfor %}{% endif %}\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0

  test "line statements":
    let src = "# for item in items\n<li>{{ item }}</li>\n# endfor\n"
    let result = validateSource(src, flavor = lfJinja)
    check result.errors.len >= 0