diff --git a/test/function_test.py b/test/function_test.py
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index 0000000..ba38383
--- /dev/null
+++ b/test/function_test.py
@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+"""
+>>> import random
+>>> import math
+>>> from samila import GenerativeImage, Projection
+>>> import pickle
+>>> def f1(x,y):
+...    result = random.uniform(-1,1) * x**2  - math.sin(y**2) + abs(y-x)
+...    return result
+>>> def f2(x,y):
+...    result = random.uniform(-1,1) * y**3 - math.cos(x**2) + 2*x
+...    return result
+>>> g = GenerativeImage(f1,f2)
+>>> g.function1 == f1
+True
+>>> g.function2 == f2
+True
+>>> g.fig
+>>> g.generate()
+>>> isinstance(g.data1, list)
+True
+>>> isinstance(g.data2, list)
+True
+>>> g.generate(seed=10, start=-2*math.pi, step=0.1, stop=math.pi/2)
+>>> g.seed
+10
+>>> with open("test/test1_1_d1.pkl", "rb") as fp:
+...   temp_data = pickle.load(fp)
+>>> temp_data == g.data1
+True
+>>> with open("test/test1_1_d2.pkl", "rb") as fp:
+...   temp_data = pickle.load(fp)
+>>> temp_data == g.data2
+True
+>>> g.plot()
+>>> g.plot(color='red')
+>>> g.plot(color='red', bgcolor='black')
+>>> from samila import GenerativeImage, Projection
+>>> g.plot(projection=Projection.POLAR, color='red', bgcolor='black')
+>>> g.plot(projection=Projection.POLAR, color=(.1, .2, .8))
+>>> g.plot(bgcolor=(.1, .2, .8), spot_size=0.1)
+>>> g.plot(size=(20, 20))
+>>> result = g.nft_storage(api_key="")
+>>> result['status']
+False
+>>> result['message']
+'API Key is missing, make sure the `Authorization` header has a value in the following format `Bearer {api key}`.'
+"""
diff --git a/test/test1_1_d1.pkl b/test/test1_1_d1.pkl
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diff --git a/test/test1_1_d2.pkl b/test/test1_1_d2.pkl
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