[dak/master 06/10] Split out parse_format to module-level and test it explicitly.

[Chris Lamb <lamby@debian.org>]

Signed-off-by: Chris Lamb <lamby@debian.org>
---
 daklib/srcformats.py     |   49 ++++++++++++++++++++++++++++-----------------
 tests/test_srcformats.py |   39 +++++++++++++++++------------------
 2 files changed, 49 insertions(+), 39 deletions(-)

diff --git a/daklib/srcformats.py b/daklib/srcformats.py
index 2b07c7e..f3afb8d 100644
--- a/daklib/srcformats.py
+++ b/daklib/srcformats.py
@@ -5,6 +5,36 @@ from dak_exceptions import UnknownFormatError
 
 srcformats = []
 
+def parse_format(txt):
+    """
+    Parse a .changes Format string into a tuple representation for easy
+    comparison.
+
+    >>> parse_format('1.0')
+    (1, 0)
+    >>> parse_format('8.4 (hardy)')
+    (8, 4, 'hardy')
+
+    If the format doesn't match these forms, raises UnknownFormatError.
+    """
+
+    format = re_verwithext.search(txt)
+
+    if format is None:
+        raise UnknownFormatError, txt
+
+    format = format.groups()
+
+    if format[1] is None:
+        format = int(float(format[0])), 0, format[2]
+    else:
+        format = int(format[0]), int(format[1]), format[2]
+
+    if format[2] is None:
+        format = format[:2]
+
+    return format
+
 class SourceFormat(type):
     def __new__(cls, name, bases, attrs):
         klass = super(SourceFormat, cls).__new__(cls, name, bases, attrs)
@@ -28,25 +58,6 @@ class SourceFormat(type):
                 yield "contains source files not allowed in format %s" % cls.name
 
     @classmethod
-    def parse_format(cls, txt):
-        format = re_verwithext.search(txt)
-
-        if format is None:
-            raise UnknownFormatError, txt
-
-        format = format.groups()
-
-        if format[1] is None:
-            format = int(float(format[0])), 0, format[2]
-        else:
-            format = int(format[0]), int(format[1]), format[2]
-
-        if format[2] is None:
-            format = format[:2]
-
-        return format
-
-    @classmethod
     def validate_format(cls, format, is_a_dsc=False, field='files'):
         if is_a_dsc:
             if format != (1,0) and \
diff --git a/tests/test_srcformats.py b/tests/test_srcformats.py
index 9c62d83..0ae1823 100755
--- a/tests/test_srcformats.py
+++ b/tests/test_srcformats.py
@@ -105,28 +105,27 @@ class FormatTreeQuiltTestCase(SourceFormatTestCase):
 
 ##
 
-class ParseFormat(unittest.TestCase):
-    def assertFormat(self, input, expected, **kwargs):
-        format = srcformats.SourceFormat.parse_format(input)
-        self.assertEqual(format, expected)
-        srcformats.SourceFormat.validate_format(format, **kwargs)
-
-    def assertInvalidFormat(self, input, **kwargs):
-        try:
-            format = srcformats.SourceFormat.parse_format(input)
-            srcformats.SourceFormat.validate_format(format, **kwargs)
-        except UnknownFormatError:
-            return
+class ParseFormatTestCase(unittest.TestCase):
+    def assertParse(self, format, expected):
+        self.assertEqual(srcformats.parse_format(format), expected)
+
+    def assertParseFail(self, format):
+        self.assertRaises(
+            UnknownFormatError,
+            lambda: srcformats.parse_format(format)
+        )
+
+    def testParse(self):
+        self.assertParse('1.0', (1, 0))
 
     def testEmpty(self):
-        self.assertInvalidFormat('')
-        self.assertInvalidFormat(' ')
-        self.assertInvalidFormat('  ')
-
-    def testBroken(self):
-        self.assertInvalidFormat('.0')
-        self.assertInvalidFormat('.1')
-        self.assertInvalidFormat('format')
+        self.assertParseFail('')
+        self.assertParseFail(' ')
+        self.assertParseFail('  ')
+
+    def textText(self):
+        self.assertParse('1.2 (three)', (1, 2, 'three'))
+        self.assertParseFail('0.0 ()')
 
 class ParseSourceFormat(ParseFormat):
     def assertFormat(self, *args, **kwargs):
-- 
1.6.3.3