michael@0: // If the debuggee cannot be put into debug mode, throw.
michael@0: 
michael@0: // Run this test only if this compartment can't be put into debug mode.
michael@0: var canEnable = true;
michael@0: if (typeof setDebugMode === 'function') {
michael@0:     try {
michael@0:         setDebugMode(true);
michael@0:     } catch (exc) {
michael@0:         canEnable = false;
michael@0:     }
michael@0: }
michael@0: 
michael@0: if (!canEnable) {
michael@0:     var g = newGlobal();
michael@0:     g.libdir = libdir;
michael@0:     g.eval("load(libdir + 'asserts.js');");
michael@0:     g.parent = this;
michael@0:     g.eval("assertThrowsInstanceOf(function () { new Debugger(parent); }, Error);");
michael@0: }