Add decompression test

Author: rhpvorderman

tests/test_igzip_lib.py

@@ -20,11 +20,13 @@
 
 import itertools
 from typing import NamedTuple
-from .test_compat import DATA as RAW_DATA
-from isal import igzip_lib
 
 import pytest
 
+from isal import igzip_lib
+from .test_compat import DATA as RAW_DATA
+
+
 class Flag(NamedTuple):
     comp: int
     decomp: int
@@ -50,4 +52,10 @@ class Flag(NamedTuple):
 def test_compress_decompress(level, flag: Flag, hist_bits):
     comp = igzip_lib.compress(DATA, level, flag.comp, hist_bits)
     decomp = igzip_lib.decompress(comp, flag.decomp, hist_bits)
-    assert decomp == DATA
+    assert decomp == DATA
+
+class TestIgzipDecompressor():
+    compressed = igzip_lib.compress(DATA)
+    def test_decompress(self):
+        decomp = igzip_lib.IgzipDecompressor()
+        assert decomp.decompress(self.compressed) == DATA