1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/xdr/function-flags.js b/js/src/jit-test/tests/xdr/function-flags.js
new file mode 100644
index 0000000000..62c69752b7
--- /dev/null
+++ b/js/src/jit-test/tests/xdr/function-flags.js
@@ -0,0 +1,40 @@
+load(libdir + 'bytecode-cache.js');
+
+var test;
+
+// Ensure that if a function is encoded we don't encode its "name
+// resolved" flag.
+test = `
+  function f() { delete f.name; return f.hasOwnProperty('name'); }
+  f();
+  `
+evalWithCache(test, { assertEqBytecode: true, assertEqResult: true });
+
+test = `
+  function f() { return f.hasOwnProperty('name'); }
+  f();
+  `
+evalWithCache(test, { assertEqBytecode: true, assertEqResult: true });
+
+// Ensure that if a function is encoded we don't encode its "length
+// resolved" flag.
+test = `
+  function f() { delete f.length; return f.hasOwnProperty('length'); }
+  f();
+  `
+evalWithCache(test, { assertEqBytecode: true, assertEqResult: true });
+
+test = `
+  function f() { return f.hasOwnProperty('length'); }
+  f();
+  `
+evalWithCache(test, { assertEqBytecode: true, assertEqResult: true });
+
+// And make sure our bytecode is actually not reflecting the flags,
+// not that we ignore them on decode.
+test = `
+  function f() { return f.hasOwnProperty('length') || f.hasOwnProperty('name'); }
+  f();
+  `
+evalWithCache(test, { assertEqBytecode: true, assertEqResult: true });
+