## JavaScript 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 "JavaScript Exhaustive Tests":

  test "basic valid JS":
    let src = "function hello() { return 42; }\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "arrow function":
    let src = "const add = (a, b) => a + b;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "template literal":
    let src = "const msg = `Hello, ${name}!`;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "unclosed template literal":
    let src = "const x = `hello\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "nested template literal":
    let src = "const x = `${`${`deep`}`}`\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "regex literal":
    let src = "const re = /abc[0-9]+/g;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "regex with escapes":
    let src = "const re = /\\d+\\.\\d+/gi;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "class definition":
    let src = "class Animal {\n  constructor(name) { this.name = name; }\n  speak() { return this.name; }\n}\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "async/await":
    let src = "async function fetch() {\n  const res = await fetch('/api');\n  return res.json();\n}\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "destructuring":
    let src = "const { a, b: c } = obj;\nconst [x, ...rest] = arr;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "spread operator":
    let src = "const merged = {...obj1, ...obj2};\nconst nums = [1, ...[2, 3], 4];\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "optional chaining":
    let src = "const x = obj?.prop ?? 'default';\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "generator function":
    let src = "function* gen() {\n  yield 1;\n  yield 2;\n}\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "unclosed string with escape":
    let src = "const s = \"hello\\\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "line comment //":
    let src = "// this is a comment\nconst x = 1;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "block comment /* */":
    let src = "const x = /* inline comment */ 42;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "unclosed block comment":
    let src = "const x = 1; /* never closed\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

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

  test "unicode escape in string":
    let src = "const s = \"\\u00E9\\u00E0\\u00FC\";\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "binary null byte":
    let src = "const x = 1;\x00const y = 2;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "import/export ESM":
    let src = "import { foo } from './bar.js';\nexport const baz = 42;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0

  test "bigint literal":
    let src = "const big = 9007199254740991n;\n"
    let result = validateSource(src, flavor = lfJavaScript)
    check result.errors.len >= 0