Fix python-semver#251: Correct return type for next_version() (python-semver#254)

tlaferriere · Thomas Laferriere · web-flow · commit f55559acfe25 · 2020-05-13T20:18:08.000+02:00
* Return VersionInfo instance in VersionInfo.next_version and
  not str when part is major, minor, or patch.
* Change test_next_version_with_versioninfo
  Test for correct return type (should be VersionInfo)
* Update CHANGELOG.rst

Co-authored-by: Thomas Laferriere &lt;thomas.laferriere@bell.ca&gt;
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -6,6 +6,32 @@ Change Log
 All notable changes to this code base will be documented in this file,
 in every released version.
 
+Version 2.10.1 (WIP)
+====================
+
+:Released: 2020-0x-0y
+:Maintainer:
+
+
+Features
+--------
+
+
+Bug Fixes
+---------
+
+* :gh:`251` (:pr:`254`): Fixed return type of ``semver.VersionInfo.next_version``
+  to always return a ``VersionInfo`` instance.
+
+
+Additions
+---------
+
+
+Removals
+--------
+
+
 Version 2.10.0
 ==============
 
diff --git a/semver.py b/semver.py
@@ -471,7 +471,8 @@ def next_version(self, part, prerelease_token="rc"):
 
         :param part: One of "major", "minor", "patch", or "prerelease"
         :param prerelease_token: prefix string of prerelease, defaults to 'rc'
-        :return:
+        :return: new object with the appropriate part raised
+        :rtype: :class:`VersionInfo`
         """
         validparts = {
             "major",
@@ -495,7 +496,7 @@ def next_version(self, part, prerelease_token="rc"):
             return version.replace(prerelease=None, build=None)
 
         if part in ("major", "minor", "patch"):
-            return str(getattr(version, "bump_" + part)())
+            return getattr(version, "bump_" + part)()
 
         if not version.prerelease:
             version = version.bump_patch()
diff --git a/test_semver.py b/test_semver.py
@@ -1050,4 +1050,6 @@ def test_next_version_with_invalid_parts():
 )
 def test_next_version_with_versioninfo(version, part, expected):
     ver = VersionInfo.parse(version)
-    assert str(ver.next_version(part)) == expected
+    next_version = ver.next_version(part)
+    assert isinstance(next_version, VersionInfo)
+    assert str(next_version) == expected

Original file line number	Diff line number	Diff line change
`@@ -1050,4 +1050,6 @@ def test_next_version_with_invalid_parts():`
`1050`	`1050`	`)`
`1051`	`1051`	`def test_next_version_with_versioninfo(version, part, expected):`
`1052`	`1052`	`ver = VersionInfo.parse(version)`
`1053`		`- assert str(ver.next_version(part)) == expected`
	`1053`	`+ next_version = ver.next_version(part)`
	`1054`	`+ assert isinstance(next_version, VersionInfo)`
	`1055`	`+ assert str(next_version) == expected`