Package org.gdbms.engine.data.command

Examples of org.gdbms.engine.data.command.CommandStack.canUndo()

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        CommandStack cs = new CommandStack();
        cs.setLimit(3);
        cs.setUseLimit(true);
       
        assertTrue(!cs.canRedo());
        assertTrue(!cs.canUndo());
       
        cs.put(new C());
        assertTrue(!cs.canRedo());
        assertTrue(cs.canUndo());
       
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        assertTrue(!cs.canRedo());
        assertTrue(!cs.canUndo());
       
        cs.put(new C());
        assertTrue(!cs.canRedo());
        assertTrue(cs.canUndo());
       
        cs.put(new C());
        cs.put(new C());
        assertTrue(!cs.canRedo());
        assertTrue(cs.canUndo());
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        assertTrue(cs.canUndo());
       
        cs.put(new C());
        cs.put(new C());
        assertTrue(!cs.canRedo());
        assertTrue(cs.canUndo());

        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(cs.canUndo());
        cs.undo();
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        assertTrue(!cs.canRedo());
        assertTrue(cs.canUndo());

        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(cs.canUndo());
        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(cs.canUndo());
        cs.undo();
        assertTrue(cs.canRedo());
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        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(cs.canUndo());
        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(cs.canUndo());
        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(!cs.canUndo());
    }
   
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        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(cs.canUndo());
        cs.undo();
        assertTrue(cs.canRedo());
        assertTrue(!cs.canUndo());
    }
   
    public void testLimit() throws Exception {
        CommandStack cs = new CommandStack();
        cs.setLimit(2);
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        cs.put(new C(2));
        cs.put(new C(3));
        assertTrue(cs.undo().equals(new C(3)));
        assertTrue(cs.undo().equals(new C(2)));
        assertTrue(cs.canRedo());
        assertTrue(!cs.canUndo());
    }
   
    public void testPutUndoPut() throws Exception {
        CommandStack cs = new CommandStack();
        cs.setUseLimit(false);
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        assertTrue(cs.undo().equals(new C(2)));
        assertTrue(cs.redo().equals(new C(2)));
        assertTrue(cs.canRedo());
        cs.put(new C(3));
        assertTrue(!cs.canRedo());
        assertTrue(cs.canUndo());
    }
   
    public class C implements Command {

        private int id;
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