add test for inf float value on Tag class

Author: mbhall88

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+##  [Unreleased]
+
+### Fixed
+
+- handle `inf` float values ([@lucventurini](https://github.com/lucventurini))
+
 ## [0.1.1] - 2020-05-16
 
 ### Added
@@ -15,5 +21,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Don't rely on `poetry` to get version.
 
-
+[Unreleased]: https://github.com/snakemake/snakefmt/compare/0.1.1...HEAD
 [0.1.1]: https://github.com/mbhall88/pafpy/compare/0.1.0...0.1.1

tests/test_tag.py

@@ -114,3 +114,14 @@ def test_tag_with_float_value_parsed(self):
         expected = Tag(tag, tag_type, value)
 
         assert actual == expected
+
+    def test_tag_with_inf_float_value_parsed(self):
+        tag = "de"
+        tag_type = "f"
+        value = "inf"
+        string = ":".join([tag, tag_type, str(value)])
+
+        actual = Tag.from_str(string)
+        expected = Tag(tag, tag_type, float(value))
+
+        assert actual == expected