Examples of org.apache.tapestry5.MarkupWriter

org.apache.tapestry5.MarkupWriter
An interface used by objects, such as Tapestry components, that need to render themselves as some form of XML markup. A markup writer maintains the idea of a current element. Attributes are added to the current element, and new text and elements are placed inside the current element. In this way, the markup writer maintains a facade that XML markup is generated as a stream, even though the implementation builds a kind of DOM tree. The DOM tree can be also be manipulated. This solves a number of problems from Tapestry 4 (and earlier) where random access to the DOM was desired and had to be simulated through complex buffering.

    }


    @Test
    public void current_element_at_end_of_root_element_is_null()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");


        assertNull(w.end());
    }

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    }


    @Test
    public void element_nesting()
    {
        MarkupWriter w = new MarkupWriterImpl();


        Element root = w.element("root");


        w.attributes("foo", "bar");


        w.write("before child");


        assertNotSame(w.element("nested"), root);


        w.write("inner text");


        assertSame(w.end(), root);


        w.write("after child");


        root.attribute("gnip", "gnop");


        assertEquals(w.toString(),
                     "<root foo=\"bar\" gnip=\"gnop\">before child<nested>inner text</nested>after child</root>");
    }

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    }


    @Test
    public void element_with_attributes()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("img", "src", "foo.png", "width", 20, "height", 20);
        w.end();


        // img is a tag with an end tag style of omit, so no close tag is written.


        assertEquals(w.toString(), "<img height=\"20\" src=\"foo.png\" width=\"20\">");
    }

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    }


    @Test
    public void attributes()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");


        w.attributes("foo", "bar", "gnip", "gnop");


        assertEquals(w.toString(), "<root foo=\"bar\" gnip=\"gnop\"></root>");
    }

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    }


    @Test
    public void comment()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");
        w.comment("A comment");
        w.end();


        assertEquals(w.toString(), "<root><!-- A comment --></root>");
    }

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    }


    @Test
    public void entities_inside_comment_not_converted()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");
        w.comment("<&>");
        w.end();


        assertEquals(w.toString(), "<root><!-- <&> --></root>");


    }

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    }


    @Test
    public void new_text_node_after_comment_node()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");
        w.write("before");
        w.comment("A comment");
        w.write("after");
        w.end();


        assertEquals(w.toString(), "<root>before<!-- A comment -->after</root>");
    }

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    }


    @Test
    public void null_write_is_ok()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");
        w.write(null);
        w.end();


        assertEquals(w.toString(), "<root></root>");
    }

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    }


    @Test
    public void writef()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");
        w.writef("Test name: %s", "writef");


        assertEquals(w.toString(), "<root>Test name: writef</root>");
    }

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    @Test
    public void write_raw()
    {
        MarkupWriter w = new MarkupWriterImpl();


        w.element("root");
        w.write("<");
        w.writeRaw("&nbsp;");
        w.write(">");
        w.end();


        assertEquals(w.toString(), "<root>&lt;&nbsp;&gt;</root>");
    }

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