1 files changed, 92 insertions, 0 deletions
diff --git a/tests/test_util/test_util_docutils.py b/tests/test_util/test_util_docutils.py
new file mode 100644
index 0000000..69999eb
--- /dev/null
+++ b/tests/test_util/test_util_docutils.py
@@ -0,0 +1,92 @@
+"""Tests util.utils functions."""
+
+import os
+
+from docutils import nodes
+
+from sphinx.util.docutils import (
+    SphinxFileOutput,
+    SphinxTranslator,
+    docutils_namespace,
+    new_document,
+    register_node,
+)
+
+
+def test_register_node():
+    class custom_node(nodes.Element):
+        pass
+
+    with docutils_namespace():
+        register_node(custom_node)
+
+        # check registered
+        assert hasattr(nodes.GenericNodeVisitor, 'visit_custom_node')
+        assert hasattr(nodes.GenericNodeVisitor, 'depart_custom_node')
+        assert hasattr(nodes.SparseNodeVisitor, 'visit_custom_node')
+        assert hasattr(nodes.SparseNodeVisitor, 'depart_custom_node')
+
+    # check unregistered outside namespace
+    assert not hasattr(nodes.GenericNodeVisitor, 'visit_custom_node')
+    assert not hasattr(nodes.GenericNodeVisitor, 'depart_custom_node')
+    assert not hasattr(nodes.SparseNodeVisitor, 'visit_custom_node')
+    assert not hasattr(nodes.SparseNodeVisitor, 'depart_custom_node')
+
+
+def test_SphinxFileOutput(tmpdir):
+    content = 'Hello Sphinx World'
+
+    # write test.txt at first
+    filename = str(tmpdir / 'test.txt')
+    output = SphinxFileOutput(destination_path=filename)
+    output.write(content)
+    os.utime(filename, (0, 0))
+
+    # overwrite it again
+    output.write(content)
+    assert os.stat(filename).st_mtime != 0  # updated
+
+    # write test2.txt at first
+    filename = str(tmpdir / 'test2.txt')
+    output = SphinxFileOutput(destination_path=filename, overwrite_if_changed=True)
+    output.write(content)
+    os.utime(filename, (0, 0))
+
+    # overwrite it again
+    output.write(content)
+    assert os.stat(filename).st_mtime == 0  # not updated
+
+    # overwrite it again (content changed)
+    output.write(content + "; content change")
+    assert os.stat(filename).st_mtime != 0  # updated
+
+
+def test_SphinxTranslator(app):
+    class CustomNode(nodes.inline):
+        pass
+
+    class MyTranslator(SphinxTranslator):
+        def __init__(self, *args):
+            self.called = []
+            super().__init__(*args)
+
+        def visit_document(self, node):
+            pass
+
+        def depart_document(self, node):
+            pass
+
+        def visit_inline(self, node):
+            self.called.append('visit_inline')
+
+        def depart_inline(self, node):
+            self.called.append('depart_inline')
+
+    document = new_document('')
+    document += CustomNode()
+
+    translator = MyTranslator(document, app.builder)
+    document.walkabout(translator)
+
+    # MyTranslator does not have visit_CustomNode. But it calls visit_inline instead.
+    assert translator.called == ['visit_inline', 'depart_inline']