1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/function/dstr/dflt-obj-ptrn-id-init-skipped.js b/js/src/tests/test262/language/statements/function/dstr/dflt-obj-ptrn-id-init-skipped.js
new file mode 100644
index 0000000000..c6e73db2f9
--- /dev/null
+++ b/js/src/tests/test262/language/statements/function/dstr/dflt-obj-ptrn-id-init-skipped.js
@@ -0,0 +1,67 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/obj-ptrn-id-init-skipped.case
+// - src/dstr-binding/default/func-decl-dflt.template
+/*---
+description: Destructuring initializer is not evaluated when value is not `undefined` (function declaration (default parameter))
+esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
+features: [destructuring-binding, default-parameters]
+flags: [generated]
+info: |
+    FunctionDeclaration :
+        function BindingIdentifier ( FormalParameters ) { FunctionBody }
+
+        [...]
+        3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
+           scope, strict).
+        [...]
+
+    9.2.1 [[Call]] ( thisArgument, argumentsList)
+
+    [...]
+    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
+    [...]
+
+    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
+
+    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
+    [...]
+
+    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
+
+    [...]
+    23. Let iteratorRecord be Record {[[iterator]]:
+        CreateListIterator(argumentsList), [[done]]: false}.
+    24. If hasDuplicates is true, then
+        [...]
+    25. Else,
+        b. Let formalStatus be IteratorBindingInitialization for formals with
+           iteratorRecord and env as arguments.
+    [...]
+
+    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       [...]
+    [...]
+---*/
+var initCount = 0;
+function counter() {
+  initCount += 1;
+}
+
+var callCount = 0;
+function f({ w = counter(), x = counter(), y = counter(), z = counter() } = { w: null, x: 0, y: false, z: '' }) {
+  assert.sameValue(w, null);
+  assert.sameValue(x, 0);
+  assert.sameValue(y, false);
+  assert.sameValue(z, '');
+  assert.sameValue(initCount, 0);
+  callCount = callCount + 1;
+};
+f();
+assert.sameValue(callCount, 1, 'function invoked exactly once');
+
+reportCompare(0, 0);