## C++ 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 "C++ Exhaustive Tests":

  test "basic valid C++ with iostream":
    let src = "#include <iostream>\nint main() { std::cout << \"hello\"; return 0; }\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "unclosed string literal":
    let src = "#include <iostream>\nint main() { std::cout << \"unclosed; return 0; }\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "class with template":
    let src = "template<typename T>\nclass Box { T value; public: Box(T v) : value(v) {} };\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "unclosed block comment":
    let src = "#include <iostream>\nint main() { /* unclosed return 0; }\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

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

  test "null byte injection":
    let src = "int x = 5;\x00int y = 10;\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "namespace and using":
    let src = "#include <iostream>\nusing namespace std;\nint main() { cout << \"hi\"; return 0; }\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "lambda expression":
    let src = "#include <vector>\nint main() { auto f = [](int x) { return x * 2; }; return f(21); }\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "deep bracket nesting":
    let src = "int x = ((((((((((((((((((((42))))))))))))))))))));\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "multiple classes":
    let src = "class A {}; class B {}; class C : public A, public B {};\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "pointer and reference":
    let src = "int main() { int x = 42; int& r = x; int* p = &x; return *p; }\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0

  test "very long single line":
    let src = "int x = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;\n"
    let result = validateSource(src, flavor = lfCpp)
    check result.errors.len >= 0