tests/stress/template-literal-syntax.js

   1
   2 function testSyntax(script) {
   3     try {
   4         eval(script);
   5     } catch (error) {
   6         if (error instanceof SyntaxError)
   7             throw new Error("Bad error: " + String(error));
   8     }
   9 }
  10
  11 function testSyntaxError(script, message) {
  12     var error = null;
  13     try {
  14         eval(script);
  15     } catch (e) {
  16         error = e;
  17     }
  18     if (!error)
  19         throw new Error("Expected syntax error not thrown");
  20
  21     if (String(error) !== message)
  22         throw new Error("Bad error: " + String(error));
  23 }
  24
  25 testSyntax("`Hello`");
  26 testSyntax("(`Hello`)");
  27 testSyntax("(`Hello`) + 42");
  28 testSyntax("`\nHello\nWorld`");
  29 testSyntax("`\nHello\n${World}`");
  30 testSyntax("`${World}`");
  31 testSyntax("`${World} Hello`");
  32 testSyntax("`$ {World} Hello`");
  33 testSyntax("`\\uFEFFtest`");
  34 testSyntax("`\r\n`");
  35 testSyntax("`\\r\\n`");
  36 testSyntax("`\n`");
  37 testSyntax("`\\n`");
  38 testSyntax("`\u2028`");
  39 testSyntax("`\\u2028`");
  40 testSyntax("`\u2029`");
  41 testSyntax("`\\u2029`");
  42 testSyntax("`\\0`");
  43 testSyntax("`\0`");
  44 testSyntax("`\\x7f`");
  45 testSyntax("(`Hello`) + 42");
  46 testSyntax("`\\\n`");
  47 testSyntax("`\\\r\n`");
  48 testSyntax("`\\\r`");
  49
  50 testSyntaxError("`Hello", "SyntaxError: Unexpected EOF");
  51 testSyntaxError("`Hello${expr}", "SyntaxError: Unexpected EOF");
  52 testSyntaxError("`Hello${}", "SyntaxError: Unexpected token '}'. Template literal expression cannot be empty.");
  53 testSyntaxError("`Hello${expr} ${}", "SyntaxError: Unexpected token '}'. Template literal expression cannot be empty.");
  54 testSyntaxError("`Hello${expr}", "SyntaxError: Unexpected EOF");
  55 testSyntaxError("`Hello${expr} ${expr}", "SyntaxError: Unexpected EOF");
  56 testSyntaxError("`Hello${expr`", "SyntaxError: Unexpected EOF");
  57 testSyntaxError("`Hello${expr} ${expr`", "SyntaxError: Unexpected EOF");
  58 testSyntaxError("`Hello expr${`", "SyntaxError: Unexpected EOF");
  59 testSyntaxError("`Hello${expr} expr${`", "SyntaxError: Unexpected EOF");
  60 testSyntaxError("`Hello ${}`", "SyntaxError: Unexpected token '}'. Template literal expression cannot be empty.");
  61 testSyntaxError("`Hello${expr} ${}`", "SyntaxError: Unexpected token '}'. Template literal expression cannot be empty.");
  62 testSyntaxError("`\\07`", "SyntaxError: The only valid numeric escape in strict mode is '\\0'");
  63 for (var i = 1; i < 7; ++i) {
  64     testSyntaxError("`\\" + i + "`", "SyntaxError: The only valid numeric escape in strict mode is '\\0'");
  65     testSyntaxError("`${expr}\\" + i + "`", "SyntaxError: The only valid numeric escape in strict mode is '\\0'");
  66 }
  67 // \8 and \9 are not allowed.
  68 for (var i = 8; i < 9; ++i) {
  69     testSyntaxError("`\\" + i + "`", "SyntaxError: The only valid numeric escape in strict mode is '\\0'");
  70     testSyntaxError("`${expr}\\" + i + "`", "SyntaxError: The only valid numeric escape in strict mode is '\\0'");
  71 }
  72 testSyntaxError("`\\x7`", "SyntaxError: \\x can only be followed by a hex character sequence");
  73 testSyntaxError("`${expr}\\x7`", "SyntaxError: \\x can only be followed by a hex character sequence");
  74 testSyntaxError("`\\x`", "SyntaxError: \\x can only be followed by a hex character sequence");
  75 testSyntaxError("`${expr}\\x`", "SyntaxError: \\x can only be followed by a hex character sequence");
  76 testSyntaxError("`\\u`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  77 testSyntaxError("`${expr}\\u`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  78 testSyntaxError("`\\u2`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  79 testSyntaxError("`${expr}\\u2`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  80 testSyntaxError("`\\u20`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  81 testSyntaxError("`${expr}\\u20`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  82 testSyntaxError("`\\u202`", "SyntaxError: \\u can only be followed by a Unicode character sequence");
  83 testSyntaxError("`${expr}\\u202`", "SyntaxError: \\u can only be followed by a Unicode character sequence");