Rename examples and add simple system test

.gitignore

@@ -2,4 +2,7 @@ dev/scripts/airflow_operators.json
 dev/scripts/diagrams_nodes.json
 
 dist
-airflow_diagrams.egg-info
+airflow_diagrams.egg-info
+
+.idea
+build

README.md

@@ -27,8 +27,8 @@ This will create a file called `diagram.py` which contains the definition to cre
 
 Run this file and you will get a rendered diagram.
 
-A working example can be found in [examples](examples) with the [test_dag](examples/dags/test_dag.py) generating the 
-[diagram](examples/diagrams/test_dag.py) ([rendered](examples/diagrams/test_dag.png) version).
+A working example can be found in [examples](examples) with the [example_dag](examples/dags/example_dag.py) generating 
+the [diagram](examples/diagrams/example_dag.py) ([rendered](examples/diagrams/example_dag.png) version).
 
 ## Contributing
 

examples/dags/test_dag.py → examples/dags/example_dag.py

@@ -4,7 +4,7 @@
 
 from airflow_diagrams import generate_diagram_from_dag
 
-with DAG('test_dag', schedule_interval=None, default_args=dict(start_date=days_ago(2))) as dag:
+with DAG('example_dag', schedule_interval=None, default_args=dict(start_date=days_ago(2))) as dag:
     DummyOperator(task_id='run_this_1') >> [
         DummyOperator(task_id='run_this_2a'), DummyOperator(task_id='run_this_2b')
     ] >> DummyOperator(task_id='run_this_3')

examples/diagrams/test_dag.py → examples/diagrams/example_dag.py

@@ -1,14 +1,14 @@
 from diagrams import Diagram
 from diagrams.generic.blank import Blank
 
-with Diagram("test_dag", show=False):
+with Diagram("example_dag", show=False):
     run_this_1 = Blank("run_this_1")
-    run_this_2b = Blank("run_this_2b")
-    run_this_3 = Blank("run_this_3")
     run_this_2a = Blank("run_this_2a")
+    run_this_3 = Blank("run_this_3")
+    run_this_2b = Blank("run_this_2b")
 
-    run_this_1 >> run_this_2b
-    run_this_2b >> run_this_3
     run_this_1 >> run_this_2a
     run_this_2a >> run_this_3
+    run_this_1 >> run_this_2b
+    run_this_2b >> run_this_3
 

tests/test_airflow_diagrams.py

@@ -0,0 +1,11 @@
+import subprocess
+import unittest
+
+
+class TestAirflowDiagrams(unittest.TestCase):
+    def test_run_example_dag(self):
+        subprocess.call(['python', 'examples/dags/example_dag.py'])
+
+
+if __name__ == '__main__':
+    unittest.main()