add test case

Author: sokra

test/cases/scope-hoisting/intra-references/a.js

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+export { default } from "./b";

test/cases/scope-hoisting/intra-references/b.js

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+export { default } from "./c";

test/cases/scope-hoisting/intra-references/c.js

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+export default "ok";

test/cases/scope-hoisting/intra-references/index.js

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+import value from "./a";
+
+it("should have the correct values", function() {
+	value.should.be.eql("ok");
+});
+
+
+// prevent scope hoisting of b
+require("./b");