1 files changed, 35 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 0000000000..9b4b36bf42
--- /dev/null
+++ b/js/src/jit-test/tests/modules/global-scope.js
@@ -0,0 +1,35 @@
+// Test interaction with global object and global lexical scope.
+
+function evalModuleAndCheck(source, expected) {
+    let m = parseModule(source);
+    moduleLink(m);
+    moduleEvaluate(m);
+    assertEq(getModuleEnvironmentValue(m, "r"), expected);
+}
+
+var x = 1;
+evalModuleAndCheck("export let r = x; x = 2;", 1);
+assertEq(x, 2);
+
+let y = 3;
+evalModuleAndCheck("export let r = y; y = 4;", 3);
+assertEq(y, 4);
+
+if (helperThreadCount() == 0)
+    quit();
+
+function offThreadEvalModuleAndCheck(source, expected) {
+    offThreadCompileModuleToStencil(source);
+    let stencil = finishOffThreadStencil();
+    let m = instantiateModuleStencil(stencil);
+    print("compiled");
+    moduleLink(m);
+    moduleEvaluate(m);
+    assertEq(getModuleEnvironmentValue(m, "r"), expected);
+}
+
+offThreadEvalModuleAndCheck("export let r = x; x = 5;", 2);
+assertEq(x, 5);
+
+offThreadEvalModuleAndCheck("export let r = y; y = 6;", 4);
+assertEq(y, 6);