test: test_data and test_append

tests/test_plotdesc.py

@@ -30,3 +30,15 @@ def test_plot_derscription_init(plot_name, plot_title, plot_xlabel, plot_ylabel,
     assert pd.xs == xs
     assert pd.ys == ys
    
+def test_data():
+    pd = PlotDescription('name', xs = [1,2], ys = [3,4])
+
+    assert pd.data == ([1,2], [3,4])
+
+def test_append():
+    pd = PlotDescription('name', xs = [1,2], ys = [3,4])
+
+    pd.append([3,5])    
+
+    assert pd.xs == [1,2,3]
+    assert pd.ys == [3,4,5]