1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Object/toPrimitive-callers.js b/js/src/tests/ecma_6/Object/toPrimitive-callers.js
new file mode 100644
index 000000000..ffeef2225
--- /dev/null
+++ b/js/src/tests/ecma_6/Object/toPrimitive-callers.js
@@ -0,0 +1,57 @@
+// Check all the algorithms that call ToPrimitive. Confirm that they're passing
+// the correct hint, per spec.
+
+var STRING = "xyzzy";
+var NUMBER = 42;
+
+function assertCallsToPrimitive(f, expectedHint, expectedResult) {
+    var hint = undefined;
+    var testObj = {
+        [Symbol.toPrimitive](h) {
+            assertEq(hint, undefined);
+            hint = h;
+            return h === "number" ? NUMBER : STRING;
+        }
+    };
+    var result = f(testObj);
+    assertEq(hint, expectedHint, String(f));
+    assertEq(result, expectedResult, String(f));
+}
+
+// ToNumber
+assertCallsToPrimitive(Number, "number", NUMBER);
+
+// ToString
+assertCallsToPrimitive(String, "string", STRING);
+
+// ToPropertyKey
+var obj = {[STRING]: "pass"};
+assertCallsToPrimitive(key => obj[key], "string", "pass");
+
+// Abstract Relational Comparison
+assertCallsToPrimitive(x => x >= 42, "number", true);
+assertCallsToPrimitive(x => x > "42", "number", false);
+
+// Abstract Equality Comparison
+assertCallsToPrimitive(x => x != STRING, "default", false);
+assertCallsToPrimitive(x => STRING == x, "default", true);
+assertCallsToPrimitive(x => x == NUMBER, "default", false);
+assertCallsToPrimitive(x => NUMBER != x, "default", true);
+
+// Addition
+assertCallsToPrimitive(x => 1 + x, "default", "1" + STRING);
+assertCallsToPrimitive(x => "" + x, "default", STRING);
+
+// Date constructor
+assertCallsToPrimitive(x => (new Date(x)).valueOf(), "default", Number(STRING));
+
+// Date.prototype.toJSON
+var expected = "a suffusion of yellow";
+function testJSON(x) {
+    x.toJSON = Date.prototype.toJSON;
+    x.toISOString = function () { return expected; };
+    return JSON.stringify(x);
+}
+assertCallsToPrimitive(testJSON, "number", JSON.stringify(expected));
+
+reportCompare(0, 0);