Tests: Move ipython magic tests to main unit test suite

The `.github/system_tests/test_ipython_magics.py` file provided tests
for the ipython magics, however, these can simply be run in the main
test suite invoked directly through `pytest`.

.github/workflows/tests.sh

@@ -4,9 +4,6 @@ set -ev
 # Make sure the folder containing the workchains is in the python path before the daemon is started
 SYSTEM_TESTS="${GITHUB_WORKSPACE}/.github/system_tests"
 
-# tests for the testing infrastructure
-pytest --cov aiida --verbose --noconftest ${SYSTEM_TESTS}/test_ipython_magics.py
-
 # Until the `${SYSTEM_TESTS}/pytest` tests are moved within `tests` we have to run them separately and pass in the path to the
 # `conftest.py` explicitly, because otherwise it won't be able to find the fixtures it provides
 AIIDA_TEST_PROFILE=test_aiida pytest --cov aiida --verbose tests/conftest.py ${SYSTEM_TESTS}/pytest

tests/tools/ipython/test_ipython_magics.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+"""Tests for :mod:`aiida.tools.ipython.ipython_magics`."""
+import textwrap
+
+from IPython.testing.globalipapp import get_ipython
+
+from aiida.tools.ipython.ipython_magics import register_ipython_extension
+
+
+def test_ipython_magics():
+    """Test that the ``%aiida`` magic can be loaded and imports the ``QueryBuilder`` and ``Node`` classes."""
+    ipy = get_ipython()
+    register_ipython_extension(ipy)
+    cell = textwrap.dedent(
+        """
+        %aiida
+        qb=QueryBuilder()
+        qb.append(Node)
+        qb.all()
+        Dict().store()
+        """
+    )
+    result = ipy.run_cell(cell)
+    assert result.success