Coverage for assignment to left hand side expressions that are an assignment. Fixes gh-2487

test/language/expressions/assignment/target-assignment-inside-function.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-assignment-operators-static-semantics-early-errors
+description: Applied to assignment
+info: |
+  AssignmentExpression : LeftHandSideExpression = AssignmentExpression
+
+  - It is an early Syntax Error if LeftHandSideExpression is neither an
+    ObjectLiteral nor an ArrayLiteral and AssignmentTargetType of
+    LeftHandSideExpression is invalid or strict.
+
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+function f() {
+  var a, b = 2;
+  (a = b) = 1;
+}

test/language/expressions/assignment/target-assignment.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-assignment-operators-static-semantics-early-errors
+description: Applied to assignment
+info: |
+  AssignmentExpression : LeftHandSideExpression = AssignmentExpression
+
+  - It is an early Syntax Error if LeftHandSideExpression is neither an
+    ObjectLiteral nor an ArrayLiteral and AssignmentTargetType of
+    LeftHandSideExpression is invalid or strict.
+
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+var a, b = 2;
+(a = b) = 1;