test_ext_inheritance.py

# -*- coding: utf-8 -*-
"""
    test_inheritance
    ~~~~~~~~~~~~~~~~

    Tests for :mod:`sphinx.ext.inheritance_diagram` module.

    :copyright: Copyright 2015 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import os

import pytest

from sphinx.ext.inheritance_diagram import InheritanceDiagram


@pytest.mark.sphinx(buildername="html", testroot="inheritance")
@pytest.mark.usefixtures('if_graphviz_found')
def test_inheritance_diagram(app, status, warning):
    # monkey-patch InheritaceDiagram.run() so we can get access to its
    # results.
    orig_run = InheritanceDiagram.run
    graphs = {}

    def new_run(self):
        result = orig_run(self)
        node = result[0]
        source = os.path.basename(node.document.current_source).replace(".rst", "")
        graphs[source] = node['graph']
        return result

    InheritanceDiagram.run = new_run

    try:
        app.builder.build_all()
    finally:
        InheritanceDiagram.run = orig_run

    assert app.statuscode == 0

    html_warnings = warning.getvalue()
    assert html_warnings == ""

    # note: it is better to split these asserts into separate test functions
    # but I can't figure out how to build only a specific .rst file

    # basic inheritance diagram showing all classes
    for cls in graphs['basic_diagram'].class_info:
        # use in b/c traversing order is different sometimes
        assert cls in [
            ('dummy.test.A', 'dummy.test.A', [], None),
            ('dummy.test.F', 'dummy.test.F', ['dummy.test.C'], None),
            ('dummy.test.C', 'dummy.test.C', ['dummy.test.A'], None),
            ('dummy.test.E', 'dummy.test.E', ['dummy.test.B'], None),
            ('dummy.test.D', 'dummy.test.D', ['dummy.test.B', 'dummy.test.C'], None),
            ('dummy.test.B', 'dummy.test.B', ['dummy.test.A'], None)
        ]

    # inheritance diagram using :parts: 1 option
    for cls in graphs['diagram_w_parts'].class_info:
        assert cls in [
            ('A', 'dummy.test.A', [], None),
            ('F', 'dummy.test.F', ['C'], None),
            ('C', 'dummy.test.C', ['A'], None),
            ('E', 'dummy.test.E', ['B'], None),
            ('D', 'dummy.test.D', ['B', 'C'], None),
            ('B', 'dummy.test.B', ['A'], None)
        ]

    # inheritance diagram with 1 top class
    # :top-classes: dummy.test.B
    # rendering should be
    #       A
    #        \
    #     B   C
    #    / \ / \
    #   E   D   F
    #
    for cls in graphs['diagram_w_1_top_class'].class_info:
        assert cls in [
            ('dummy.test.A', 'dummy.test.A', [], None),
            ('dummy.test.F', 'dummy.test.F', ['dummy.test.C'], None),
            ('dummy.test.C', 'dummy.test.C', ['dummy.test.A'], None),
            ('dummy.test.E', 'dummy.test.E', ['dummy.test.B'], None),
            ('dummy.test.D', 'dummy.test.D', ['dummy.test.B', 'dummy.test.C'], None),
            ('dummy.test.B', 'dummy.test.B', [], None)
        ]

    # inheritance diagram with 2 top classes
    # :top-classes: dummy.test.B, dummy.test.C
    # Note: we're specifying separate classes, not the entire module here
    # rendering should be
    #
    #     B   C
    #    / \ / \
    #   E   D   F
    #
    for cls in graphs['diagram_w_2_top_classes'].class_info:
        assert cls in [
            ('dummy.test.F', 'dummy.test.F', ['dummy.test.C'], None),
            ('dummy.test.C', 'dummy.test.C', [], None),
            ('dummy.test.E', 'dummy.test.E', ['dummy.test.B'], None),
            ('dummy.test.D', 'dummy.test.D', ['dummy.test.B', 'dummy.test.C'], None),
            ('dummy.test.B', 'dummy.test.B', [], None)
        ]

    # inheritance diagram with 2 top classes and specifiying the entire module
    # rendering should be
    #
    #       A
    #     B   C
    #    / \ / \
    #   E   D   F
    #
    # Note: dummy.test.A is included in the graph before its descendants are even processed
    # b/c we've specified to load the entire module. The way InheritanceGraph works it is very
    # hard to exclude parent classes once after they have been included in the graph.
    # If you'd like to not show class A in the graph don't specify the entire module.
    # this is a known issue.
    for cls in graphs['diagram_module_w_2_top_classes'].class_info:
        assert cls in [
            ('dummy.test.F', 'dummy.test.F', ['dummy.test.C'], None),
            ('dummy.test.C', 'dummy.test.C', [], None),
            ('dummy.test.E', 'dummy.test.E', ['dummy.test.B'], None),
            ('dummy.test.D', 'dummy.test.D', ['dummy.test.B', 'dummy.test.C'], None),
            ('dummy.test.B', 'dummy.test.B', [], None),
            ('dummy.test.A', 'dummy.test.A', [], None),
        ]