1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/modules/global-scope.js b/js/src/jit-test/tests/modules/global-scope.js
new file mode 100644
index 000000000..90a9f7026
--- /dev/null
+++ b/js/src/jit-test/tests/modules/global-scope.js
@@ -0,0 +1,32 @@
+// Test interaction with global object and global lexical scope.
+
+function parseAndEvaluate(source) {
+    let m = parseModule(source);
+    m.declarationInstantiation();
+    return m.evaluation();
+}
+
+var x = 1;
+assertEq(parseAndEvaluate("let r = x; x = 2; r"), 1);
+assertEq(x, 2);
+
+let y = 3;
+assertEq(parseAndEvaluate("let r = y; y = 4; r"), 3);
+assertEq(y, 4);
+
+if (helperThreadCount() == 0)
+    quit();
+
+function offThreadParseAndEvaluate(source) {
+    offThreadCompileModule(source);
+    let m = finishOffThreadModule();
+    print("compiled");
+    m.declarationInstantiation();
+    return m.evaluation();
+}
+
+assertEq(offThreadParseAndEvaluate("let r = x; x = 5; r"), 2);
+assertEq(x, 5);
+
+assertEq(offThreadParseAndEvaluate("let r = y; y = 6; r"), 4);
+assertEq(y, 6);