"""Tests for the svg2pdf preprocessor"""

# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.

from nbformat import v4 as nbformat

from .base import PreprocessorTestsBase
from ..svg2pdf import SVG2PDFPreprocessor
from ...tests.utils import onlyif_cmds_exist


class Testsvg2pdf(PreprocessorTestsBase):
    """Contains test functions for svg2pdf.py"""

    simple_svg = """<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   version="1.0"
   x="0.00000000"
   y="0.00000000"
   width="500.00000"
   height="500.00000"
   id="svg2">
  <defs
     id="defs4" />
  <g
     id="layer1">
    <rect
       width="300.00000"
       height="300.00000"
       x="100.00000"
       y="100.00000"
       style="opacity:1.0000000;fill:none;fill-opacity:1.0000000;fill-rule:evenodd;stroke:#000000;stroke-width:8.0000000;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4.0000000;stroke-dasharray:none;stroke-dashoffset:0.00000000;stroke-opacity:1.0000000"
       id="rect5719" />
  </g>
</svg>"""

    def build_notebook(self):
        """Build a reveal slides notebook in memory for use with tests.
        Overrides base in PreprocessorTestsBase"""

        outputs = [nbformat.new_output(output_type='display_data',
                                       data={'image/svg+xml':self.simple_svg})
                  ]

        cells=[nbformat.new_code_cell(source="", execution_count=1, outputs=outputs)]

        return nbformat.new_notebook(cells=cells)


    def build_preprocessor(self):
        """Make an instance of a preprocessor"""
        preprocessor = SVG2PDFPreprocessor()
        preprocessor.enabled = True
        return preprocessor


    def test_constructor(self):
        """Can a SVG2PDFPreprocessor be constructed?"""
        self.build_preprocessor()


    @onlyif_cmds_exist('inkscape')
    def test_output(self):
        """Test the output of the SVG2PDFPreprocessor"""
        nb = self.build_notebook()
        res = self.build_resources()
        preprocessor = self.build_preprocessor()
        nb, res = preprocessor(nb, res)
        self.assertIn('application/pdf', nb.cells[0].outputs[0].data)
        
