1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/language/function-code/if-decl-no-else-func-skip-dft-param.js b/js/src/tests/test262/annexB/language/function-code/if-decl-no-else-func-skip-dft-param.js
new file mode 100644
index 0000000000..f69e1063be
--- /dev/null
+++ b/js/src/tests/test262/annexB/language/function-code/if-decl-no-else-func-skip-dft-param.js
@@ -0,0 +1,39 @@
+// This file was procedurally generated from the following sources:
+// - src/annex-b-fns/func-skip-dft-param.case
+// - src/annex-b-fns/func/if-decl-no-else.template
+/*---
+description: Extension not observed when there is a default parameter with the same name (IfStatement without an else clause in function scope)
+esid: sec-functiondeclarations-in-ifstatement-statement-clauses
+flags: [generated, noStrict]
+info: |
+    The following rules for IfStatement augment those in 13.6:
+
+    IfStatement[Yield, Return]:
+        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else Statement[?Yield, ?Return]
+        if ( Expression[In, ?Yield] ) Statement[?Yield, ?Return] else FunctionDeclaration[?Yield]
+        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else FunctionDeclaration[?Yield]
+        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield]
+
+
+    B.3.3.1 Changes to FunctionDeclarationInstantiation
+
+    [...]
+    ii. If replacing the FunctionDeclaration f with a VariableStatement that
+        has F as a BindingIdentifier would not produce any Early Errors for
+        func and F is not an element of BoundNames of argumentsList, then
+    [...]
+---*/
+var init, after;
+
+(function(f = 123) {
+  init = f;
+
+  if (true) function f() {  }
+
+  after = f;
+}());
+
+assert.sameValue(init, 123, 'binding is not initialized to `undefined`');
+assert.sameValue(after, 123, 'value is not updated following evaluation');
+
+reportCompare(0, 0);