src/v8/test/preparser/duplicate-parameter.pyt

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# Templatated tests with duplicate parameter names.

# ----------------------------------------------------------------------
# Constants and utility functions

# A template that performs the same strict-mode test in different
# scopes (global scope, function scope, and nested function scope),
# and in non-strict mode too.
def DuplicateParameterTest(name, source):
  expectation = "strict_param_dupe"
  non_selfstrict = {"selfstrict":"", "id":"selfnormal"}

  Template(name, '"use strict";\n' + source)(non_selfstrict, expectation)
  Template(name + '-infunc',
           'function foo() {\n "use strict";\n' + source +'\n}\n')(
               non_selfstrict, expectation)
  Template(name + '-infunc2',
           'function foo() {\n "use strict";\n  function bar() {\n' +
           source +'\n }\n}\n')(non_selfstrict, expectation)

  selfstrict = {"selfstrict": "\"use strict\";", "id": "selfstrict"}
  nestedstrict = {"selfstrict": "function bar(){\"use strict\";}",
                  "id": "nestedstrict"}
  selfstrictnestedclean = {"selfstrict": """
      "use strict";
      function bar(){}
    """, "id": "selfstrictnestedclean"}
  selftest = Template(name + '-$id', source)
  selftest(selfstrict, expectation)
  selftest(selfstrictnestedclean, expectation)
  selftest(nestedstrict, None)
  selftest(non_selfstrict, None)


# ----------------------------------------------------------------------
# Test templates

DuplicateParameterTest("dups", """
  function foo(a, a) { $selfstrict }
""");

DuplicateParameterTest("dups-apart", """
  function foo(a, b, c, d, e, f, g, h, i, j, k, l, m, n, a) { $selfstrict }
""");

DuplicateParameterTest("dups-escaped", """
  function foo(\u0061, b, c, d, e, f, g, h, i, j, k, l, m, n, a) { $selfstrict }
""");

DuplicateParameterTest("triples", """
  function foo(a, b, c, d, e, f, g, h, a, i, j, k, l, m, n, a) { $selfstrict }
""");

DuplicateParameterTest("escapes", """
  function foo(a, \u0061) { $selfstrict }
""");

DuplicateParameterTest("long-names", """
  function foo(arglebargleglopglyfarglebargleglopglyfarglebargleglopglyfa,
               arglebargleglopglyfarglebargleglopglyfarglebargleglopglyfa) {
    $selfstrict
  }
""");