1 files changed, 75 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/conditional/coalesce-expr-ternary.js b/js/src/tests/test262/language/expressions/conditional/coalesce-expr-ternary.js
new file mode 100644
index 0000000000..543f22127a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/conditional/coalesce-expr-ternary.js
@@ -0,0 +1,75 @@
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    ShortCircuitExpression in the Conditional Expression (? :)
+esid: sec-conditional-operator
+info: |
+    ShortCircuitExpression :
+        LogicalORExpression
+        CoalesceExpression
+
+    CoalesceExpression :
+        CoalesceExpressionHead ?? BitwiseORExpression
+
+    CoalesceExpressionHead :
+        CoalesceExpression
+        BitwiseORExpression
+
+    ConditionalExpression :
+        ShortCircuitExpression
+        ShortCircuitExpression ? AssignmentExpression : AssignmentExpression
+features: [coalesce-expression]
+---*/
+
+var x;
+
+x = undefined ?? true ? 0 : 42;
+assert.sameValue(x, 0, 'undefined ?? true ? 0 : 42');
+
+x = undefined;
+x = null ?? true ? 0 : 42;
+assert.sameValue(x, 0, 'null ?? true ? 0 : 42');
+
+x = undefined;
+x = undefined ?? false ? 0 : 42;
+assert.sameValue(x, 42, 'undefined ?? false ? 0 : 42');
+
+x = undefined;
+x = null ?? false ? 0 : 42;
+assert.sameValue(x, 42, 'null ?? false ? 0 : 42');
+
+x = undefined;
+x = false ?? true ? 0 : 42;
+assert.sameValue(x, 42, 'false ?? true ? 0 : 42');
+
+x = undefined;
+x = 0 ?? true ? 0 : 42;
+assert.sameValue(x, 42, '0 ?? true ? 0 : 42');
+
+x = undefined;
+x = 1 ?? false ? 0 : 42;
+assert.sameValue(x, 0, '1 ?? false ? 0 : 42');
+
+x = undefined;
+x = true ?? false ? 0 : 42;
+assert.sameValue(x, 0, 'true ?? false ? 0 : 42');
+
+x = undefined;
+x = true ?? true ? 0 : 42;
+assert.sameValue(x, 0, 'true ?? true ? 0 : 42');
+
+x = undefined;
+x = '' ?? true ? 0 : 42;
+assert.sameValue(x, 42, '"" ?? true ? 0 : 42');
+
+x = undefined;
+x = Symbol() ?? false ? 0 : 42;
+assert.sameValue(x, 0, 'Symbol() ?? false ? 0 : 42');
+
+x = undefined;
+x = {} ?? false ? 0 : 42;
+assert.sameValue(x, 0, 'object ?? false ? 0 : 42');
+
+reportCompare(0, 0);