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| * March 31, 1998. |
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| * ***** END LICENSE BLOCK ***** */ |
| |
| gTestfile = '10.1.4-4.js'; |
| |
| /** |
| File Name: 10.1.4-1.js |
| ECMA Section: 10.1.4 Scope Chain and Identifier Resolution |
| Description: |
| Every execution context has associated with it a scope chain. This is |
| logically a list of objects that are searched when binding an Identifier. |
| When control enters an execution context, the scope chain is created and |
| is populated with an initial set of objects, depending on the type of |
| code. When control leaves the execution context, the scope chain is |
| destroyed. |
| |
| During execution, the scope chain of the execution context is affected |
| only by WithStatement. When execution enters a with block, the object |
| specified in the with statement is added to the front of the scope chain. |
| When execution leaves a with block, whether normally or via a break or |
| continue statement, the object is removed from the scope chain. The object |
| being removed will always be the first object in the scope chain. |
| |
| During execution, the syntactic production PrimaryExpression : Identifier |
| is evaluated using the following algorithm: |
| |
| 1. Get the next object in the scope chain. If there isn't one, go to step 5. |
| 2. Call the [[HasProperty]] method of Result(l), passing the Identifier as |
| the property. |
| 3. If Result(2) is true, return a value of type Reference whose base object |
| is Result(l) and whose property name is the Identifier. |
| 4. Go to step 1. |
| 5. Return a value of type Reference whose base object is null and whose |
| property name is the Identifier. |
| The result of binding an identifier is always a value of type Reference with |
| its member name component equal to the identifier string. |
| Author: christine@netscape.com |
| Date: 12 november 1997 |
| */ |
| var SECTION = "10.1.4-1"; |
| var VERSION = "ECMA_1"; |
| startTest(); |
| |
| writeHeaderToLog( SECTION + " Scope Chain and Identifier Resolution"); |
| |
| new TestCase( "SECTION", |
| "with MyObject, eval should be [object Global].eval " ); |
| test(); |
| |
| function test() { |
| for ( gTc=0; gTc < gTestcases.length; gTc++ ) { |
| |
| var MYOBJECT = new MyObject(); |
| var INPUT = 2; |
| gTestcases[gTc].description += ( INPUT +"" ); |
| |
| with ( MYOBJECT ) { |
| eval( INPUT ); |
| } |
| |
| gTestcases[gTc].actual = eval( INPUT ); |
| gTestcases[gTc].expect = INPUT; |
| |
| gTestcases[gTc].passed = writeTestCaseResult( |
| gTestcases[gTc].expect, |
| gTestcases[gTc].actual, |
| gTestcases[gTc].description +" = "+ |
| gTestcases[gTc].actual ); |
| |
| gTestcases[gTc].reason += ( gTestcases[gTc].passed ) ? "" : "wrong value "; |
| } |
| stopTest(); |
| return ( gTestcases ); |
| } |
| |
| function MyObject() { |
| this.eval = new Function( "x", "return(Math.pow(Number(x),2))" ); |
| } |