Adding tests for plotter

tests/test_plotter.py

@@ -0,0 +1,45 @@
+from pytentiostat.plotter import plot_initializer, plot_updater
+import pytentiostat.config_reader as cr
+import os
+import mock
+
+THIS_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+def test_plot_initializer():
+    confdir = os.path.join(THIS_DIR, 'static/')
+    config_data = cr.parse_config_file(confdir)
+    with mock.patch("my.module.plt.show") as show_patch:
+        line = plot_initializer(config_data)
+        assert show_patch.called
+        xlow, xhigh = line.get_xlim()
+        print (xlow)
+        ylow, yhigh = line.get_ylim()
+        assert xlow == -2.5
+        assert xhigh == 2.5
+        assert ylow == -2.5
+        assert yhigh == 2.5
+        xlabel = line.xaxis.get_label()
+        ylabel = line.yaxis.get_label()
+        assert xlabel == "Voltage (V)"
+        assert ylabel == "Current (mA)"
+
+def test_plot_updater():
+    confdir = os.path.join(THIS_DIR, 'static/')
+    config_data = cr.parse_config_file(confdir)
+    with mock.patch("my.module.plt.show") as show_patch:
+        line = plot_initializer(config_data)
+        data = (0, 0, 0)
+        plot_updater(config_data, data, line)
+        assert show_patch.called
+        xlow, xhigh = line.get_xlim()
+        print(xlow)
+        ylow, yhigh = line.get_ylim()
+        assert xlow == -2.5
+        assert xhigh == 2.5
+        assert ylow == -2.5
+        assert yhigh == 2.5
+        xlabel = line.xaxis.get_label()
+        ylabel = line.yaxis.get_label()
+        assert xlabel == "Voltage (V)"
+        assert ylabel == "Current (mA)"