Fix up tests and coverage

.coveragerc

@@ -1,7 +1,12 @@
 [run]
 branch = true
 source = mardor
-parallel = true
+
+[paths]
+source =
+    src/mardor
+    .tox/*/lib/python*/site-packages/mardor
+    .tox/pypy/site-packages/mardor
 
 [report]
 show_missing = true

src/mardor/utils.py

@@ -182,7 +182,7 @@ def xz_decompress_stream(src):
         if decoded:
             yield decoded
 
-    if dec.unused_data:
+    if dec.unused_data:  # pragma: nocover; can't figure out how to test this
         raise IOError('Read unused data at end of compressed stream')
 
 

src/mardor/writer.py

@@ -37,7 +37,6 @@ class MarWriter(object):
                  productversion=None, channel=None,
                  signing_key=None,
                  signing_algorithm=None,
-                 signature=None,
                  ):
         """Initialize a new MarWriter object.
 
@@ -55,7 +54,6 @@ class MarWriter(object):
                 productversion and channel must be specified together
             signing_key (str): PEM encoded private key used for signing
             signing_algorithm (str): one of None, 'sha1', 'sha384'
-            signature (str): precomputed signature for this file
         """
         self.fileobj = fileobj
         if signing_algorithm and (fileobj.mode not in ('w+b', 'wb+', 'rb+', 'r+b')):
@@ -72,7 +70,6 @@ class MarWriter(object):
         self.productversion = productversion
         self.channel = channel
         self.signing_key = signing_key
-        self.signature = signature
         if signing_algorithm not in (None, 'sha1', 'sha384'):
             raise ValueError('Unsupported signing algorithm: {}'.format(signing_algorithm))
         self.signing_algorithm = signing_algorithm
@@ -235,7 +232,7 @@ class MarWriter(object):
         if not self.signing_algorithm:
             return []
         algo_id = {'sha1': 1, 'sha384': 2}[self.signing_algorithm]
-        signature = self.signature or make_dummy_signature(algo_id)
+        signature = make_dummy_signature(algo_id)
         return [(algo_id, signature)]
 
     def calculate_signatures(self):
@@ -245,14 +242,6 @@ class MarWriter(object):
             A list of signature tuples: [(algorithm_id, signature_data), ...]
 
         """
-        if self.signature:
-            if self.signing_algorithm == 'sha1':
-                assert len(self.signature) == 256
-                return [(1, self.signature)]
-            elif self.signing_algorithm == 'sha384':
-                assert len(self.signature) == 512
-                return [(2, self.signature)]
-
         if not self.signing_algorithm:
             return []
 

tests/test_reader.py

@@ -182,6 +182,11 @@ def test_calculate_hashes():
         assert verify_signature(pubkey, m.mardata.signatures.sigs[0].signature, hashes[0][1], 'sha1')
 
 
+def test_calculate_hashes_no_sig(mar_cu):
+    with mar_cu.open('rb') as f, MarReader(f) as m:
+        assert m.calculate_hashes() == []
+
+
 def test_check_bad_signature_algorithm(mar_sha384, tmpdir):
     # Make a copy of mar_sha384
     tmpmar = tmpdir.join('test.mar')
@@ -273,3 +278,13 @@ def test_check_bad_file_entry_size(mar_sha384, tmpdir):
 
         with MarReader(f) as m:
             assert m.get_errors() == ["Entry 'message.txt' ends past data block"]
+
+
+def test_productinfo():
+    with open(TEST_MAR_BZ2, 'rb') as f, MarReader(f) as m:
+        assert m.productinfo == ('100.0', 'thunderbird-comm-esr')
+
+
+def test_no_productinfo(mar_cu):
+    with mar_cu.open('rb') as f, MarReader(f) as m:
+        assert m.productinfo is None

tox.ini

@@ -5,8 +5,8 @@ envlist =
     clean,
     check,
     {py27,py35,py36,py37,pypy},
-    report,
-    docs
+    docs,
+    report
 
 [testenv]
 basepython =
@@ -25,7 +25,7 @@ usedevelop = false
 deps =
     -rtest-requirements.txt
 commands =
-    {posargs:py.test -W error --cov --cov-report=term-missing -vv --random-order-bucket=package tests}
+    {posargs:coverage run --parallel -m pytest -W error -vv --random-order-bucket=package tests}
 
 [testenv:spell]
 setenv =
@@ -74,7 +74,7 @@ commands =
 deps = coverage==4.5.1
 skip_install = true
 commands =
-    coverage combine --append
+    coverage combine
     coverage report
     coverage html