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-rw-r--r--js/src/jit-test/tests/debug/Object-forceLexicalInitializationByName.js61
1 files changed, 61 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-forceLexicalInitializationByName.js b/js/src/jit-test/tests/debug/Object-forceLexicalInitializationByName.js
new file mode 100644
index 000000000..4546a23d6
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-forceLexicalInitializationByName.js
@@ -0,0 +1,61 @@
+load(libdir + "asserts.js");
+
+var g = newGlobal();
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+
+let errorOne, errorTwo;
+
+function evalErrorStr(global, evalString) {
+ try {
+ global.evaluate(evalString);
+ return undefined;
+ } catch (e) {
+ return e.toString();
+ }
+}
+
+
+assertEq(evalErrorStr(g, "let y = IDONTEXIST;"), "ReferenceError: IDONTEXIST is not defined");
+assertEq(evalErrorStr(g, "y = 1;"),
+ "ReferenceError: can't access lexical declaration `y' before initialization");
+
+// Here we flip the uninitialized binding to undfined.
+assertEq(gw.forceLexicalInitializationByName("y"), true);
+assertEq(g.evaluate("y"), undefined);
+g.evaluate("y = 1;");
+assertEq(g.evaluate("y"), 1);
+
+// Ensure that bogus bindings return false, but otherwise trigger no error or
+// side effect.
+assertEq(gw.forceLexicalInitializationByName("idontexist"), false);
+assertEq(evalErrorStr(g, "idontexist"), "ReferenceError: idontexist is not defined");
+
+// Ensure that ropes (non-atoms) behave properly
+assertEq(gw.forceLexicalInitializationByName(("foo" + "bar" + "bop" + "zopple" + 2 + 3).slice(1)),
+ false);
+assertEq(evalErrorStr(g, "let oobarbopzopple23 = IDONTEXIST;"), "ReferenceError: IDONTEXIST is not defined");
+assertEq(gw.forceLexicalInitializationByName(("foo" + "bar" + "bop" + "zopple" + 2 + 3).slice(1)),
+ true);
+assertEq(g.evaluate("oobarbopzopple23"), undefined);
+
+// Ensure that only strings are accepted by forceLexicalInitializationByName
+const bad_types = [
+ 2112,
+ {geddy: "lee"},
+ () => 1,
+ [],
+ Array,
+ "'1'", // non-identifier
+]
+
+for (var badType of bad_types) {
+ assertThrowsInstanceOf(() => {
+ gw.forceLexicalInitializationByName(badType);
+ }, TypeError);
+}
+
+// Finally, supplying no arguments should throw a type error
+assertThrowsInstanceOf(() => {
+ Debugger.isCompilableUnit();
+}, TypeError);