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+/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+ File Name: 11.6.1-1.js
+ ECMA Section: 11.6.1 The addition operator ( + )
+ Description:
+
+ The addition operator either performs string concatenation or numeric
+ addition.
+
+ The production AdditiveExpression : AdditiveExpression + MultiplicativeExpression
+ is evaluated as follows:
+
+ 1. Evaluate AdditiveExpression.
+ 2. Call GetValue(Result(1)).
+ 3. Evaluate MultiplicativeExpression.
+ 4. Call GetValue(Result(3)).
+ 5. Call ToPrimitive(Result(2)).
+ 6. Call ToPrimitive(Result(4)).
+ 7. If Type(Result(5)) is String or Type(Result(6)) is String, go to step 12.
+ (Note that this step differs from step 3 in the algorithm for comparison
+ for the relational operators in using or instead of and.)
+ 8. Call ToNumber(Result(5)).
+ 9. Call ToNumber(Result(6)).
+ 10. Apply the addition operation to Result(8) and Result(9). See the discussion below (11.6.3).
+ 11. Return Result(10).
+ 12. Call ToString(Result(5)).
+ 13. Call ToString(Result(6)).
+ 14. Concatenate Result(12) followed by Result(13).
+ 15. Return Result(14).
+
+ Note that no hint is provided in the calls to ToPrimitive in steps 5 and 6.
+ All native ECMAScript objects except Date objects handle the absence of a
+ hint as if the hint Number were given; Date objects handle the absence of a
+ hint as if the hint String were given. Host objects may handle the absence
+ of a hint in some other manner.
+
+ This test does not cover cases where the Additive or Mulplicative expression
+ ToPrimitive is string.
+
+ Author: christine@netscape.com
+ Date: 12 november 1997
+*/
+var SECTION = "11.6.1-1";
+var VERSION = "ECMA_1";
+startTest();
+
+writeHeaderToLog( SECTION + " The Addition operator ( + )");
+
+// tests for "MyValuelessObject", where the value is
+// set in the object's prototype, not the object itself.
+
+new TestCase( SECTION,
+ "var EXP_1 = new MyValuelessObject(true); var EXP_2 = new MyValuelessObject(false); EXP_1 + EXP_2",
+ 1,
+ eval("var EXP_1 = new MyValuelessObject(true); var EXP_2 = new MyValuelessObject(false); EXP_1 + EXP_2") );
+
+new TestCase( SECTION,
+ "var EXP_1 = new MyValuelessObject(new Boolean(true)); var EXP_2 = new MyValuelessObject(new Boolean(false)); EXP_1 + EXP_2",
+ "truefalse",
+ eval("var EXP_1 = new MyValuelessObject(new Boolean(true)); var EXP_2 = new MyValuelessObject(new Boolean(false)); EXP_1 + EXP_2") );
+
+// tests for "MyValuelessObject", where the value is
+// set in the object's prototype, not the object itself.
+
+
+new TestCase( SECTION,
+ "var EXP_1 = new MyValuelessObject(100); var EXP_2 = new MyValuelessObject(-1); EXP_1 + EXP_2",
+ 99,
+ eval("var EXP_1 = new MyValuelessObject(100); var EXP_2 = new MyValuelessObject(-1); EXP_1 + EXP_2") );
+
+new TestCase( SECTION,
+ "var EXP_1 = new MyValuelessObject(new Number(100)); var EXP_2 = new MyValuelessObject(new Number(-1)); EXP_1 + EXP_2",
+ "100-1",
+ eval("var EXP_1 = new MyValuelessObject(new Number(100)); var EXP_2 = new MyValuelessObject(new Number(-1)); EXP_1 + EXP_2") );
+
+new TestCase( SECTION,
+ "var EXP_1 = new MyValuelessObject( new MyValuelessObject( new Boolean(true) ) ); EXP_1 + EXP_1",
+ "truetrue",
+ eval("var EXP_1 = new MyValuelessObject( new MyValuelessObject( new Boolean(true) ) ); EXP_1 + EXP_1") );
+
+test();
+
+function MyProtoValuelessObject() {
+ this.valueOf = new Function ( "" );
+ this.__proto__ = null;
+}
+
+function MyProtolessObject( value ) {
+ this.valueOf = new Function( "return this.value" );
+ this.__proto__ = null;
+ this.value = value;
+}
+
+function MyValuelessObject(value) {
+ this.__proto__ = new MyPrototypeObject(value);
+}
+function MyPrototypeObject(value) {
+ this.valueOf = new Function( "return this.value;" );
+ this.toString = new Function( "return (this.value + '');" );
+ this.value = value;
+}
+
+function MyObject( value ) {
+ this.valueOf = new Function( "return this.value" );
+ this.value = value;
+}