Made project structure more modular.

* Project can now be started as a package
* Added unit-tests

test/test_imports.py

@@ -0,0 +1,3 @@
+def test_import():
+    import testdata
+    from testdata import run

test/test_run.py

@@ -0,0 +1,63 @@
+from multiprocessing import Process
+import os
+import json
+import tempfile
+import random
+
+import pytest
+import requests
+
+import testdata
+
+
+PROTOCOL = 'http'
+HOST = '127.0.0.1'
+PORT = 8080
+BUFFER_SIZE = 4 * 1024
+MAX_SIZE = 2 * 1024 * 1024 * 1024
+MAX_DATA = 10 * 1024 * 1024 * 1024
+API_KEY = f'{random.randrange(16 ** 32):032x}'
+API_KEYS = { API_KEY }
+
+TIMEOUT = 5
+
+@pytest.fixture(autouse = True)
+def server():
+    # Create Temporary Databases File
+    database = tempfile.NamedTemporaryFile(delete = False).name
+
+    proc = Process(target = testdata.run, args = (HOST, PORT, API_KEYS, MAX_SIZE, MAX_DATA, database, BUFFER_SIZE))
+
+    proc.start()
+
+    # Wait until webserver becomes available
+    while True:
+        try:
+            requests.get(f'{PROTOCOL}://{HOST}:{PORT}', timeout = TIMEOUT)
+        except requests.ConnectionError:
+            continue
+
+        break
+
+    yield database
+
+    # Terminate webserver
+    proc.terminate()
+    proc.join()
+
+    # Delete Temporary File
+    os.unlink(database)
+
+
+def test_get_file():
+
+    response = requests.get(f'{PROTOCOL}://{HOST}:{PORT}/?api_key={API_KEY}&size=32', timeout = TIMEOUT)
+    assert response.content == b'\0' * 32
+
+
+def test_database_data_used(server):
+
+    requests.get(f'{PROTOCOL}://{HOST}:{PORT}/?api_key={API_KEY}&size=32', timeout = TIMEOUT)
+    with open(server) as file:
+        assert json.loads(file.read())['data-used'] == 32
+