michael@0: // Check that withSourceHook passes URLs, propagates exceptions, and
michael@0: // properly restores the original source hooks.
michael@0: 
michael@0: load(libdir + 'asserts.js');
michael@0: 
michael@0: // withSourceHook isn't defined if you pass the shell the --fuzzing-safe
michael@0: // option. Skip this test silently, to avoid spurious failures.
michael@0: if (typeof withSourceHook != 'function')
michael@0:   quit(0);
michael@0: 
michael@0: var log = '';
michael@0: 
michael@0: // Establish an outermost source hook.
michael@0: withSourceHook(function (url) {
michael@0:   log += 'o';
michael@0:   assertEq(url, 'outer');
michael@0:   return '(function outer() { 3; })';
michael@0: }, function () {
michael@0:   log += 'O';
michael@0:   // Verify that withSourceHook propagates exceptions thrown by source hooks.
michael@0:   assertThrowsValue(function () {
michael@0:     // Establish a source hook that throws.
michael@0:     withSourceHook(function (url) {
michael@0:       log += 'm';
michael@0:       assertEq(url, 'middle');
michael@0:       throw 'borborygmus'; // middle
michael@0:     }, function () {
michael@0:       log += 'M';
michael@0:       // Establish an innermost source hook that does not throw,
michael@0:       // and verify that it is in force.
michael@0:       assertEq(withSourceHook(function (url) {
michael@0:                                 log += 'i';
michael@0:                                 assertEq(url, 'inner');
michael@0:                                 return '(function inner() { 1; })';
michael@0:                               }, function () {
michael@0:                                 log += 'I';
michael@0:                                 return evaluate('(function inner() { 2; })',
michael@0:                                                 { fileName: 'inner', sourceIsLazy: true })
michael@0:                                        .toSource();
michael@0:                               }),
michael@0:                '(function inner() { 1; })');
michael@0:       // Verify that the source hook that throws has been reinstated.
michael@0:       evaluate('(function middle() { })',
michael@0:                { fileName: 'middle', sourceIsLazy: true })
michael@0:       .toSource();
michael@0:     });
michael@0:   }, 'borborygmus');
michael@0: 
michael@0:   // Verify that the outermost source hook has been restored.
michael@0:   assertEq(evaluate('(function outer() { 4; })',
michael@0:                     { fileName: 'outer', sourceIsLazy: true })
michael@0:            .toSource(),
michael@0:            '(function outer() { 3; })');
michael@0: });
michael@0: 
michael@0: assertEq(log, 'OMIimo');