test/mjsunit/harmony/module-parsing-eval.js

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// Check that import/export declarations are rejected in eval or local scope.
assertThrows("export let x;", SyntaxError);
assertThrows("import x from 'http://url';", SyntaxError);

assertThrows("{ export let x; }", SyntaxError);
assertThrows("{ import x from 'http://url'; }", SyntaxError);

assertThrows("function f() { export let x; }", SyntaxError);
assertThrows("function f() { import x from 'http://url'; }", SyntaxError);

assertThrows("function f() { { export let x; } }", SyntaxError);
assertThrows("function f() { { import x from 'http://url'; } }", SyntaxError);