Adding test validating image download to default location (#92)

tests/test_google_images_download.py

@@ -0,0 +1,53 @@
+from google_images_download import google_images_download
+import os, errno
+import time
+
+
+def silent_remove_of_file(file):
+    try:
+        os.remove(file)
+    except OSError as e:
+        if e.errno != errno.ENOENT:
+            raise e
+        return False
+    return True
+
+
+def test_download_images_to_default_location():
+    start_time = time.time()
+    argumnets = {
+        "keywords": "Polar bears",
+        "limit": 5,
+        "print_urls": False
+    }
+    try:
+        temp = argumnets['output_folder']
+    except KeyError:
+        pass
+    else:
+        assert False, "This test checks download to default location yet an output folder was provided"
+
+    output_folder_path = os.path.join(os.path.realpath('.'), 'downloads', '{}'.format(argumnets['keywords']))
+    if os.path.exists(output_folder_path):
+        start_amount_of_files_in_output_folder = len([name for name in os.listdir(output_folder_path) if os.path.isfile(os.path.join(output_folder_path, name)) and os.path.getctime(os.path.join(output_folder_path, name)) < start_time])
+    else:
+        start_amount_of_files_in_output_folder = 0
+
+    response = google_images_download.googleimagesdownload()
+    response.download(argumnets)
+    files_modified_after_test_started = [name for name in os.listdir(output_folder_path) if os.path.isfile(os.path.join(output_folder_path, name)) and os.path.getmtime(os.path.join(output_folder_path, name)) > start_time]
+    end_amount_of_files_in_output_folder = len(files_modified_after_test_started)
+    print(f"Files downloaded by test {__name__}:")
+    for file in files_modified_after_test_started:
+        print(os.path.join(output_folder_path, file))
+
+
+    # assert end_amount_of_files_in_output_folder - start_amount_of_files_in_output_folder == argumnets['limit']
+    assert end_amount_of_files_in_output_folder == argumnets['limit']
+
+    print(f"Cleaning up all files downloaded by test {__name__}...")
+    for file in files_modified_after_test_started:
+        if silent_remove_of_file(os.path.join(output_folder_path, file)):
+            print(f"Deleted {os.path.join(output_folder_path, file)}")
+        else:
+            print(f"Failed to delete {os.path.join(output_folder_path, file)}")