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-rw-r--r--js/src/tests/non262/lexical-environment/block-scoped-functions-deprecated-redecl.js78
1 files changed, 78 insertions, 0 deletions
diff --git a/js/src/tests/non262/lexical-environment/block-scoped-functions-deprecated-redecl.js b/js/src/tests/non262/lexical-environment/block-scoped-functions-deprecated-redecl.js
new file mode 100644
index 0000000000..af32be5d3d
--- /dev/null
+++ b/js/src/tests/non262/lexical-environment/block-scoped-functions-deprecated-redecl.js
@@ -0,0 +1,78 @@
+{
+ assertEq(f(), 4);
+ function f() { return 3; }
+ assertEq(f(), 4);
+ function f() { return 4; }
+ assertEq(f(), 4);
+}
+
+// Annex B still works.
+assertEq(f(), 4);
+
+// The same thing with labels.
+{
+ assertEq(f(), 4);
+ function f() { return 3; }
+ assertEq(f(), 4);
+ l: function f() { return 4; }
+ assertEq(f(), 4);
+}
+
+// Annex B still works.
+assertEq(f(), 4);
+
+function test() {
+ {
+ assertEq(f(), 2);
+ function f() { return 1; }
+ assertEq(f(), 2);
+ function f() { return 2; }
+ assertEq(f(), 2);
+ }
+
+ // Annex B still works.
+ assertEq(f(), 2);
+}
+
+test();
+
+var log = '';
+
+try {
+ // Strict mode still cannot redeclare.
+ eval(`"use strict";
+ {
+ function f() { }
+ function f() { }
+ }`);
+} catch (e) {
+ assertEq(e instanceof SyntaxError, true);
+ log += 'e';
+}
+
+try {
+ // Redeclaring an explicitly 'let'-declared binding doesn't work.
+ eval(`{
+ let x = 42;
+ function x() {}
+ }`);
+} catch (e) {
+ assertEq(e instanceof SyntaxError, true);
+ log += 'e';
+}
+
+try {
+ // Redeclaring an explicitly 'const'-declared binding doesn't work.
+ eval(`{
+ const x = 42;
+ function x() {}
+ }`);
+} catch (e) {
+ assertEq(e instanceof SyntaxError, true);
+ log += 'e';
+}
+
+assertEq(log, 'eee');
+
+if ('reportCompare' in this)
+ reportCompare(true, true);