add test for legend labels

Author: nschloe

test/test_legend_labels.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+#
+import helpers
+
+
+def plot():
+    from matplotlib import pyplot as plt
+    import numpy as np
+
+    fig = plt.figure()
+
+    x = np.ma.arange(0, 2*np.pi, 0.02)
+    y1 = np.sin(1*x)
+    y2 = np.sin(2*x)
+    y3 = np.sin(3*x)
+
+    plt.plot(x, y1, label='y1')
+    plt.plot(x, y2, label=None)
+    plt.plot(x, y3, label='y4')
+    plt.legend()
+
+    return fig
+
+
+def test():
+    phash = helpers.Phash(plot())
+    assert phash.phash == 'fb7c5e0aaed60094', phash.get_details()
+    return
+
+
+if __name__ == '__main__':
+    print(helpers.Phash(plot()).phash)
+    # helpers.compare_with_latex(plot())