Try parsing from a string

Something's wrong with the mmap-based parsing of GFA files from
Python-land on Windows... just avoid it altogether?

Author: sampsyo

flatgfa-py/test/test_flatgfa.py

@@ -3,12 +3,12 @@
 import pathlib
 
 TEST_DIR = pathlib.Path(__file__).parent
-TEST_GFA = str(TEST_DIR / "tiny.gfa")
+TEST_GFA = TEST_DIR / "tiny.gfa"
 
 
 @pytest.fixture
 def gfa():
-    return flatgfa.parse(TEST_GFA)
+    return flatgfa.parse_bytes(TEST_GFA.read_bytes())
 
 
 def test_segs(gfa):

flatgfa-py/test/test_gaf.py

@@ -2,13 +2,13 @@
 import flatgfa
 
 TEST_DIR = pathlib.Path(__file__).parent
-TEST_GFA = str(TEST_DIR / "tiny.gfa")
-TEST_GAF = str(TEST_DIR / "tiny.gaf")
+TEST_GFA = TEST_DIR / "tiny.gfa"
+TEST_GAF = TEST_DIR / "tiny.gaf"
 
 
 def test_gaf_seqs():
-    gfa = flatgfa.parse(TEST_GFA)
-    gaf = gfa.all_reads(TEST_GAF)
+    gfa = flatgfa.parse_bytes(TEST_GFA.read_bytes())
+    gaf = gfa.all_reads(str(TEST_GAF))
     seqs = ["".join(e.sequence() for e in line) for line in gaf]
     assert seqs == [
         "AAGAAATTTTCT",
@@ -17,8 +17,8 @@ def test_gaf_seqs():
 
 
 def test_gaf_ranges():
-    gfa = flatgfa.parse(TEST_GFA)
-    gaf = gfa.all_reads(TEST_GAF)
+    gfa = flatgfa.parse_bytes(TEST_GFA.read_bytes())
+    gaf = gfa.all_reads(str(TEST_GAF))
     ranges = [[e.range for e in line] for line in gaf]
     assert ranges == [
         [(5, 8), (0, 9), (1, 0)],