1 files changed, 58 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Debugger-isCompilableUnit.js b/js/src/jit-test/tests/debug/Debugger-isCompilableUnit.js
new file mode 100644
index 0000000000..dbfde0ef46
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Debugger-isCompilableUnit.js
@@ -0,0 +1,58 @@
+load(libdir + "asserts.js");
+
+const bad_types = [
+    2112,
+    {geddy: "lee"},
+    () => 1,
+    [],
+    Array
+]
+
+// We only accept strings around here!
+for (var badType of bad_types) {
+    assertThrowsInstanceOf(() => {
+        Debugger.isCompilableUnit(badType);
+    }, TypeError);
+}
+
+const compilable_units = [
+   "wubba-lubba-dub-dub",
+   "'Get Schwifty!'",
+   "1 + 2",
+   "function f(x) {}",
+   "function x(...f,) {", // statements with bad syntax are always compilable
+   "let x = 100",
+   ";;;;;;;;",
+   "",
+   " ",
+   "\n",
+   "let x",
+]
+
+const non_compilable_units = [
+    "function f(x) {",
+    "(...d) =>",
+    "{geddy:",
+    "{",
+    "[1, 2",
+    "[",
+    "1 +",
+    "let x =",
+    "3 ==",
+]
+
+for (var code of compilable_units) {
+    assertEq(Debugger.isCompilableUnit(code), true);
+}
+
+for (var code of non_compilable_units) {
+    assertEq(Debugger.isCompilableUnit(code), false);
+}
+
+// Supplying no arguments should throw a type error
+assertThrowsInstanceOf(() => {
+    Debugger.isCompilableUnit();
+}, TypeError);
+
+// Supplying extra arguments should be fine
+assertEq(Debugger.isCompilableUnit("", 1, 2, 3, 4, {}, []), true);