add %there kv command

pythonhere/__init__.py

@@ -0,0 +1,7 @@
+"""Python Here Jupyter magic."""
+from herethere.magic import load_ipython_extension
+
+from .magic_here import shortcuts  # noqa
+
+
+__all__ = ("load_ipython_extension",)

pythonhere/magic_here/shortcuts.py

@@ -0,0 +1,29 @@
+"""%there magic Python code shortcuts."""
+# pylint: disable=invalid-name
+
+import click
+from herethere.there.commands import there_code_shortcut
+
+KV_COMMAND_TEMPLATE = r"""
+from kivy.lang import Builder
+{unload_file}
+_pythonhere_new_root = Builder.load_string(r'''{code} ''', filename='_pythonhere')
+if _pythonhere_new_root:
+    root.clear_widgets()
+    root.add_widget(_pythonhere_new_root)
+del _pythonhere_new_root
+"""
+
+
+@there_code_shortcut
+@click.option(
+    "-c", "--clear-style", is_flag=True, help="Unload previously applied rules."
+)
+def kv(code: str, clear_style: bool) -> str:
+    """Insert given rules into the Kivy Language Builder.
+
+    :param code: KV language rules
+    """
+    unload_file = "Builder.unload_file('_pythonhere')" if clear_style else ""
+    code = code.replace("'''", '"""')
+    return KV_COMMAND_TEMPLATE.format(code=code, unload_file=unload_file)

run_tests.sh

@@ -4,4 +4,4 @@ set -e
 
 cd pythonhere
 PYTHONPATH=. xvfb-run --auto-servernum pytest --cov=. --cov-config=../.coveragerc --cov-report=xml ../tests
-coverage report
+coverage report -i

setup.py

@@ -26,6 +26,10 @@
         "ifaddr",
     ],
     extras_require={
+        "magic": [
+            "ipython",
+            "ipywidgets",
+        ],
         "dev": [
             "black",
             "codecov",

tests/conftest.py

@@ -1,12 +1,16 @@
 import asyncio
+
+import nest_asyncio
 import pytest
 
 from herethere.everywhere import ConnectionConfig
 from herethere.there.client import Client
+from herethere.there.commands import ContextObject, there_group
 
 from main import PythonHereApp, run_ssh_server
 
 
+
 @pytest.fixture
 def connection_config():
     return ConnectionConfig(
@@ -35,3 +39,21 @@ async def there(app_instance, connection_config):
     await asyncio.wait_for(app_instance.ssh_server_started.wait(), 5)
     await client.connect(connection_config)
     yield client
+
+
+@pytest.fixture
+def nested_event_loop(event_loop):
+    nest_asyncio.apply()
+
+
+@pytest.fixture
+async def call_there_group(nested_event_loop, app_instance, there):
+    def _callable(args, code):
+        there_group(
+            args,
+            "test",
+            standalone_mode=False,
+            obj=ContextObject(client=there, code=code),
+        )
+
+    return _callable

tests/test_magic.py

@@ -0,0 +1,21 @@
+import pytest
+from herethere.there.commands import ContextObject
+
+from magic_here import shortcuts  # noqa
+
+@pytest.mark.asyncio
+async def test_kv_command_runcode_called(call_there_group, mocker):
+    runcode = mocker.patch.object(ContextObject, 'runcode', autospec=True)
+
+    call_there_group(["kv"], "Label:")
+
+    runcode.assert_called_once()
+    ctx_obj = runcode.call_args[0][0]
+    assert "Builder.load_string(r'''Label: '''" in ctx_obj.code
+
+@pytest.mark.asyncio
+async def test_kv_command_executed(capfd, app_instance, call_there_group):
+    call_there_group(["kv"], "Label:\n    text: '''Hello there'''")
+    captured = capfd.readouterr()
+    assert not captured.out and not captured.err
+    assert app_instance.root.children[0].text == 'Hello there'

tox.ini

@@ -3,6 +3,7 @@ envlist = py37,py38
 
 [testenv]
 extras =
+     magic
      dev
 commands =
     ./run_tests.sh