write first test for sfcf input.

tests/sfcf_in_test.py

@@ -0,0 +1,29 @@
+import corrlib.input.sfcf as input
+import json
+
+def test_get_specs():
+    parameters = {
+        'crr': [
+            'f_P', 'f_A'
+            ],
+        'qr': {
+            'q1': 'a',
+            'q2': 'b',
+            'q3': 'c'
+            },
+        'wf_offsets': [
+            [0, 0, 0],
+            [1 ,2, 3],
+            [4 ,5, 6],
+        ],
+        'wf_coeff': [[1, 0.5, 0.5]],
+        'wf_basis': [
+            [0, 0],
+            [1, 2],
+            [4, 5],
+        ]
+    }
+    key = "f_P/q1 q2/1/0/0"
+    specs = json.loads(input.get_specs(key, parameters))
+    assert specs['quarks'] == ['a', 'b']
+    assert specs['wf1'][0] == [1, [0, 0]]