Add switch statement test

test/annexB/language/statements/switch/emulates-undefined.js

@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-runtime-semantics-caseclauseisselected
+description: >
+  `switch` statement uses Strict Equality Comparison,
+  which doesn't special-case [[IsHTMLDDA]] objects.
+info: |
+  Runtime Semantics: CaseClauseIsSelected ( C, input )
+
+  [...]
+  4. Return the result of performing Strict Equality Comparison input === clauseSelector.
+
+  Strict Equality Comparison
+
+  1. If Type(x) is different from Type(y), return false.
+features: [IsHTMLDDA]
+---*/
+
+var IsHTMLDDA = $262.IsHTMLDDA;
+
+assert.sameValue(
+  (function() {
+    switch (IsHTMLDDA) {
+      case undefined: return 1;
+      case null: return 2;
+      case IsHTMLDDA: return 3;
+    }
+  })(),
+  3
+);