Initial Refactoring of yoshi_otter and Test Implementation

tests/algebra/edo/test_edo.py

@@ -0,0 +1,38 @@
+from yoshi_otter.algebra.edo import Edo
+
+import unittest
+
+
+class TestEdo(unittest.TestCase):
+
+    def setUp(self):
+        def f(x, y):
+            return 2*x
+
+        self.f = f
+
+    def test_class_instantiation(self):
+        edo = Edo(self.f)
+        self.assertIsInstance(edo, Edo)
+
+    def test_euler(self):
+        edo = Edo(self.f)
+        y = edo.euler(0, 0, 1)
+
+        self.assertAlmostEqual(y, 1, 5)
+
+    def test_runge(self):
+        edo = Edo(self.f)
+        y = edo.runge(0, 0, 1)
+
+        self.assertAlmostEqual(y, 1, 5)
+
+    def test_adams(self):
+        edo = Edo(self.f)
+        y = edo.adams(0, 0, 1)
+
+        self.assertAlmostEqual(y, 1, 5)
+
+
+if __name__ == '__main__':
+    unittest.main()