Replaces sphinx-testing with sphinx.testing

conftest.py

@@ -1,5 +1,17 @@
+import pytest
+from sphinx.testing.path import path
+
+
 try:
     import pytest_doctestplus.plugin
     pytest_doctestplus
 except ImportError:
     raise ImportError("Install pytest-doctestplus to run the tests")
+
+
+pytest_plugins = 'sphinx.testing.fixtures'
+
+
+@pytest.fixture(scope='session')
+def rootdir():
+    return path(__file__).parent.abspath() / 'tests/test-build'

sphinx_math_dollar/tests/test_extension.py

@@ -1,10 +1,13 @@
-import os
+import pytest
 
-from sphinx_testing import with_app
 
-@with_app(buildername='html', srcdir=os.path.join(os.path.dirname(__file__), 'test-build'),
-          copy_srcdir_to_tmpdir=True)
-def _test_sphinx_build(app, status, warning):
+def test(app):
+    # app is a Sphinx application object for default sphinx project (`tests/roots/test-root`).
+    app.build()
+
+
+@pytest.mark.sphinx(buildername='html')
+def test_sphinx_build(app):
     app.build()
     html = (app.outdir/'index.html').read_text()
 
@@ -21,8 +24,4 @@ def _test_sphinx_build(app, status, warning):
     assert r"\[math\]" not in html
     assert r"\[nomath\]" not in html
 
-    assert not status.read()
-    assert not warning.read()
 
-def test_sphinx_build():
-    _test_sphinx_build()