Merge branch '158-add-ability-for-plugin-pipeline-external-persistent…

…-processes' of https://github.com/nasa/OnAIR into 158-add-ability-for-plugin-pipeline-external-persistent-processes

test/plugins/csv_output/test_csv_output_plugin.py

@@ -18,6 +18,7 @@
 
 def test_csv_output_plugin_init_initalizes_expected_default_variables(mocker):
 
+    # Arrange
     # Arrange
     arg_name = MagicMock()
     arg_headers = [MagicMock(), MagicMock()]
@@ -53,6 +54,7 @@ def test_csv_output_plugin_update_adds_plugins_to_headers_on_first_frame(mocker)
         "layer2": {"plugin2": [], "plugin3": []},
     }
 
+    intial_headers = copy(cut.headers)
     intial_headers = copy(cut.headers)
     expected_headers = intial_headers + ["plugin1", "plugin2", "plugin3"]
 
@@ -76,6 +78,7 @@ def test_csv_output_plugin_update_does_not_add_headers_on_first_frame_when_missi
     cut.first_frame = True
     high_level_data = {"layer1": {}, "layer2": {}}
 
+    intial_headers = copy(cut.headers)
     intial_headers = copy(cut.headers)
     expected_headers = intial_headers
 
@@ -84,6 +87,11 @@ def test_csv_output_plugin_update_does_not_add_headers_on_first_frame_when_missi
 
     # Assert
     assert cut.headers == expected_headers
+    # Act
+    cut.update([], high_level_data)
+
+    # Assert
+    assert cut.headers == expected_headers
 
 
 def test_csv_output_plugin_update_does_not_add_headers_on_first_frame_when_missing_layers(
@@ -97,6 +105,7 @@ def test_csv_output_plugin_update_does_not_add_headers_on_first_frame_when_missi
 
     high_level_data = {}
 
+    intial_headers = copy(cut.headers)
     intial_headers = copy(cut.headers)
     expected_headers = intial_headers
 
@@ -114,6 +123,7 @@ def test_csv_output_plugin_update_skips_headers_after_first_frame(mocker):
     cut.headers = fake_headers
     cut.first_frame = False
 
+    intial_headers = copy(cut.headers)
     intial_headers = copy(cut.headers)
     expected_headers = intial_headers