Add segments and test

Author: rec

git-permute

@@ -56,30 +56,6 @@ git permute a-b+c. Uses commit message of a; or, illegal?
 
 """
 
-def segments(s: str) -> Iterator[str]:
-    stack = ""
-    for i in s:
-        if i not in "+-" and stack and stack[-1] not in "+-":
-            yield stack
-            stack = ""
-        stack += i
-    if stack:
-        yield stack
-
-
-def segment_to_commits(segment: str) -> str:
-    "a+b-c+d"
-    assert len(segment) % 2 == 1, segment
-    segment += "-"
-    name, sign = zip(*(segment[i:i + 2] for i in range(0, len(segment), 2)))
-    return "".join(name), sign.index("-")
-
-
-def segments_to_commits(s):
-    for seg in segments(s):
-        yield segment_to_commits(seg)
-
-
 def git_permute():
     def report(name, items, symbol):
         if items:

gitz/git/commit_segments.py

@@ -0,0 +1,25 @@
+from typing import Iterator
+
+
+def segments(s: str) -> Iterator[str]:
+    stack = ""
+    for i in s:
+        if i not in "+-" and stack and stack[-1] not in "+-":
+            yield stack
+            stack = ""
+        stack += i
+    if stack:
+        yield stack
+
+
+def segment_to_commits(segment: str) -> str:
+    "a+b-c+d"
+    assert len(segment) % 2 == 1, segment
+    segment += "-"
+    name, sign = zip(*(segment[i:i + 2] for i in range(0, len(segment), 2)))
+    return "".join(name), sign.index("-")
+
+
+def segments_to_commits(s):
+    for seg in segments(s):
+        yield segment_to_commits(seg)

test/git_segments_test.py

@@ -0,0 +1,32 @@
+from gitz.git.commit_segments import segments_to_commits
+import unittest
+
+
+class GitSegmentsTest(unittest.TestCase):
+    def test_simple(self):
+        actual = list(segments_to_commits(""))
+        expected = []
+        self.assertEqual(actual, expected)
+
+        actual = list(segments_to_commits("a"))
+        expected = [('a', 0)]
+        self.assertEqual(actual, expected)
+
+        actual = list(segments_to_commits("ab"))
+        expected = [('a', 0), ('b', 0)]
+        self.assertEqual(actual, expected)
+
+        actual = list(segments_to_commits("a+b"))
+        expected = [('ab', 1)]
+        self.assertEqual(actual, expected)
+
+        actual = list(segments_to_commits("a-b"))
+        expected = [('ab', 0)]
+        self.assertEqual(actual, expected)
+
+    def test_complex(self):
+        actual = list(segments_to_commits("abc+de-fgh+i+j-k"))
+        expected = [
+            ('a', 0),  ('b', 0),  ('cd', 1),  ('ef', 0),  ('g', 0),  ('hijk', 2)
+        ]
+        self.assertEqual(actual, expected)