add (not complete) end-to-end test with pytest

test/util.py

@@ -0,0 +1,58 @@
+
+import hashlib
+import numpy
+import os
+
+
+def check_same_md5sum(fa, fb):
+    return (fa.md5sum() == fb.md5sum())
+
+
+class File():
+    def __init__(self, path, size = 0, content = "random", perm = 0o664):
+        if not content in ["zero", "random"]:
+            raise ValueError("invalid type: {}".format(content))
+        self.path = path
+        self.size = size
+        self.content = content
+        self.perm = perm
+
+    def __str__(self):
+        return self.path
+
+    def make(self):
+        d = os.path.dirname(self.path)
+        if d:
+            os.makedirs(d, exist_ok = True)
+        if self.content == "zero":
+            self.make_content_zero()
+        elif self.content == "random":
+            self.make_content_random()
+        else:
+            raise ValueError("invalud content type: {}".format(self.content))
+        os.chmod(self.path, self.perm)
+        return self
+
+    def make_content_zero(self):
+        with open(self.path, "wb") as f:
+            f.seek(self.size, 0)
+
+    def make_content_random(self):
+        with open(self.path, "wb") as f:
+            f.write(numpy.random.bytes(self.size))
+
+    def cleanup(self):
+        os.remove(self.path)
+        tmp = os.path.dirname(self.path)
+        while tmp and not tmp in [".", "/"]:
+            if len(os.listdir(tmp)) == 0:
+                os.rmdir(tmp)
+            tmp = os.path.dirname(tmp)
+
+    def md5sum(self):
+        m = hashlib.md5()
+        with open(self.path, 'rb') as f:
+            for chunk in iter(lambda: f.read(4096 * m.block_size), b''):
+                m.update(chunk)
+        return m.hexdigest()
+