src/third_party/mozjs-45/js/src/jit-test/tests/parser/yield-without-operand.js

// yield without an operand is fine and dandy.

load(libdir + "asserts.js");

assertNoWarning(() => Function("yield"), SyntaxError,
                "yield followed by EOF is fine");
assertNoWarning(() => Function("yield;"), SyntaxError,
                "yield followed by semicolon is fine");
assertNoWarning(() => Function("yield\n"), SyntaxError,
                "yield followed by newline is fine");
assertNoWarning(() => Function("yield\n  print('ok');"), SyntaxError,
                "yield followed by newline and statement is fine");
assertNoWarning(() => Function("yield\n  /x/;"), SyntaxError,
                "yield followed by newline and regexp is fine");
assertThrowsInstanceOf(() => Function("yield\n  /"), SyntaxError,
                       "yield followed by newline and slash is fine");

assertNoWarning(() => eval("(function () { yield; })"), SyntaxError,
                "yield followed by semicolon in eval code is fine");
assertNoWarning(() => eval("(function () { yield })"), SyntaxError,
                "yield followed by } in eval code is fine");

assertNoWarning(() => Function("yield 0;"),
                "yield with an operand should be fine");
assertNoWarning(() => Function("yield 0"),
                "yield with an operand should be fine, even without a semicolon");