Refactoring, test coverage increased to 60% (#1943)

tests/test_permutator.py

@@ -0,0 +1,34 @@
+import pytest
+from maigret.permutator import Permute
+
+
+def test_gather_strict():
+    elements = {'a': 1, 'b': 2}
+    permute = Permute(elements)
+    result = permute.gather(method="strict")
+    expected = {
+        'a_b': 1, 'b_a': 2,
+        'a-b': 1, 'b-a': 2,
+        'a.b': 1, 'b.a': 2,
+        'ab': 1, 'ba': 2,
+        '_ab': 1, 'ab_': 1,
+        '_ba': 2, 'ba_': 2
+    }
+    assert result == expected
+
+
+def test_gather_all():
+    elements = {'a': 1, 'b': 2}
+    permute = Permute(elements)
+    result = permute.gather(method="all")
+    expected = {
+        'a': 1, '_a': 1, 'a_': 1,
+        'b': 2, '_b': 2, 'b_': 2,
+        'a_b': 1, 'b_a': 2,
+        'a-b': 1, 'b-a': 2,
+        'a.b': 1, 'b.a': 2,
+        'ab': 1, 'ba': 2,
+        '_ab': 1, 'ab_': 1,
+        '_ba': 2, 'ba_': 2
+    }
+    assert result == expected