three.js/test/unit/editor/TestNegativeCases.js

module("NegativeCases");

test( "Test unwanted situations ", function() {

	var editor = new Editor();

	// illegal
	editor.undo();
	ok( editor.history.undos.length == 0, "OK, (illegal) undo did not affect the undo history");
	ok( editor.history.redos.length == 0, "OK, (illegal) undo did not affect the redo history");

	// illegal
	editor.redo();
	ok( editor.history.undos.length == 0, "OK, (illegal) redo did not affect the undo history");
	ok( editor.history.redos.length == 0, "OK, (illegal) redo did not affect the redo history");


	var box = aBox();
	var cmd = new CmdAddObject( box );
	cmd.updatable = false;
	editor.execute( cmd );

	ok( editor.history.undos.length == 1, "OK, execute changed undo history");
	ok( editor.history.redos.length == 0, "OK, execute did not change redo history");

	// illegal
	editor.redo();
	ok( editor.history.undos.length == 1, "OK, (illegal) redo did not affect the undo history");
	ok( editor.history.redos.length == 0, "OK, (illegal) redo did not affect the redo history");


	editor.undo();
	ok( editor.history.undos.length == 0, "OK, undo changed the undo history");
	ok( editor.history.redos.length == 1, "OK, undo changed the redo history");

	// illegal
	editor.undo();
	ok( editor.history.undos.length == 0, "OK, (illegal) undo did not affect the undo history");
	ok( editor.history.redos.length == 1, "OK, (illegal) undo did not affect the redo history");

	editor.redo();
	ok( editor.history.undos.length == 1, "OK, redo changed the undo history");
	ok( editor.history.redos.length == 0, "OK, undo changed the redo history");

	// illegal
	editor.redo();
	ok( editor.history.undos.length == 1, "OK, (illegal) did not affect the undo history");
	ok( editor.history.redos.length == 0, "OK, (illegal) did not affect the redo history");

});