Scripts to download files from google storage based on sha1 sums

tests/gstools_unittest.py

Index: tests/gstools_unittest.py
diff --git a/tests/gstools_unittest.py b/tests/gstools_unittest.py
new file mode 100755
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--- /dev/null
+++ b/tests/gstools_unittest.py
@@ -0,0 +1,382 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Unit tests for gstools.py and download_to/upload_from_google_storage.py."""
+
+import os
+import sys
+import unittest
+import threading
+import StringIO
+import Queue
+import optparse
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+import gstools
+import upload_to_google_storage
+import download_from_google_storage
+
+# ../third_party/gsutil/gsutil
+GSUTIL_DEFAULT_PATH = os.path.join(
+    os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+    'third_party', 'gsutil', 'gsutil')
+
+
+class GsutilMock(object):
+  def __init__(self, path, boto_path=None, timeout=None):
+    self.path = path
+    self.timeout = timeout
+    self.boto_path = boto_path
+    self.expected = []
+    self.history = []
+    self.lock = threading.Lock()
+
+  def add_expected(self, return_code, out, err):
+    self.expected.append((return_code, out, err))
+
+  def append_history(self, method, args):
+    with self.lock:
+      self.history.append((method, args))
+
+  def call(self, *args):
+    self.append_history('call', args)
+    if self.expected:
+      return self.expected.pop(0)[0]
+    else:
+      return 0
+
+  def check_call(self, *args):
+    self.append_history('check_call', args)
+    if self.expected:
+      return self.expected.pop(0)
+    else:
+      return (0, '', '')
+
+  def clone(self):
+    return self
+
+
+class GstoolsUnitTests(unittest.TestCase):
+  def setUp(self):
+    self.base_path = os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), 'gstools')
+
+  def test_gsutil(self):
+    gsutil = gstools.Gsutil(GSUTIL_DEFAULT_PATH)
+    self.assertEquals(gsutil.path, GSUTIL_DEFAULT_PATH)
+    code, _, err = gsutil.check_call()
+    self.assertEquals(code, 0)
+    self.assertEquals(err, '')
+
+  def test_gsutil_version(self):
+    gsutil = gstools.Gsutil(GSUTIL_DEFAULT_PATH)
+    _, _, err = gsutil.check_call('version')
+    err_lines = err.splitlines()
+    self.assertEquals(err_lines[0], 'gsutil version 3.25')
+    self.assertEquals(
+        err_lines[1],
+        'checksum 6ceb2cabffe2492167043c76fb067fd4 (OK)')
+
+  def test_get_sha1(self):
+    lorem_ipsum = os.path.join(self.base_path, 'lorem_ipsum.txt')
+    self.assertEquals(
+        gstools.GetSHA1(lorem_ipsum),
+        '7871c8e24da15bad8b0be2c36edc9dc77e37727f')
+
+  def test_get_md5(self):
+    lorem_ipsum = os.path.join(self.base_path, 'lorem_ipsum.txt')
+    lock = threading.Lock()
+    self.assertEquals(
+        gstools.GetMD5(lorem_ipsum, lock),
+        '634d7c1ed3545383837428f031840a1e')
+
+  def test_get_md5_cached_read(self):
+    lorem_ipsum = os.path.join(self.base_path, 'lorem_ipsum.txt')
+    lock = threading.Lock()
+    # Use a fake 'stale' MD5 sum.  Expected behavior is to return stale sum.
+    self.assertEquals(
+        gstools.GetMD5Cached(lorem_ipsum, lock),
+        '734d7c1ed3545383837428f031840a1e')
+
+  def test_get_md5_cached_write(self):
+    lorem_ipsum2 = os.path.join(self.base_path, 'lorem_ipsum2.txt')
+    lorem_ipsum2_md5 = os.path.join(self.base_path, 'lorem_ipsum2.txt.md5')
+    if os.path.exists(lorem_ipsum2_md5):
+      os.remove(lorem_ipsum2_md5)
+    lock = threading.Lock()
+    # Use a fake 'stale' MD5 sum.  Expected behavior is to return stale sum.
+    self.assertEquals(
+        gstools.GetMD5Cached(lorem_ipsum2, lock),
+        '4c02d1eb455a0f22c575265d17b84b6d')
+    self.assertTrue(os.path.exists(lorem_ipsum2_md5))
+    self.assertEquals(
+        open(lorem_ipsum2_md5, 'rb').read(),
+        '4c02d1eb455a0f22c575265d17b84b6d')
+    os.remove(lorem_ipsum2_md5)  # Clean up.
+    self.assertFalse(os.path.exists(lorem_ipsum2_md5))
+
+
+class UploadTests(unittest.TestCase):
+  def setUp(self):
+    self.gsutil = GsutilMock(GSUTIL_DEFAULT_PATH)
+    self.base_path = os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), 'gstools')
+    self.base_url = 'gs://sometesturl'
+    self.parser = optparse.OptionParser()
+    self.ret_codes = Queue.Queue()
+    self.lorem_ipsum = os.path.join(self.base_path, 'lorem_ipsum.txt')
+    self.lorem_ipsum_sha1 = '7871c8e24da15bad8b0be2c36edc9dc77e37727f'
+
+  def test_upload_single_file(self):
+    filenames = [self.lorem_ipsum]
+    output_filename = '%s.sha1'  % self.lorem_ipsum
+    if os.path.exists(output_filename):
+      os.remove(output_filename)
+    upload_to_google_storage.upload_to_google_storage(
+        filenames, self.base_url, self.gsutil, True, False, 1, False)
+    self.assertEquals(
+        self.gsutil.history,
+        [('check_call',
+          ('ls', '%s/%s' % (self.base_url, self.lorem_ipsum_sha1))),
+         ('check_call',
+          ('cp', '-q', filenames[0], '%s/%s' % (self.base_url,
+                                                self.lorem_ipsum_sha1)))])
+    self.assertTrue(os.path.exists(output_filename))
+    self.assertEquals(
+        open(output_filename, 'rb').read(),
+        '7871c8e24da15bad8b0be2c36edc9dc77e37727f')
+    os.remove(output_filename)
+
+  def test_upload_single_file_remote_exists(self):
+    filenames = [self.lorem_ipsum]
+    output_filename = '%s.sha1'  % self.lorem_ipsum
+    etag_string = 'ETag: 634d7c1ed3545383837428f031840a1e'
+    if os.path.exists(output_filename):
+      os.remove(output_filename)
+    self.gsutil.add_expected(0, '', '')
+    self.gsutil.add_expected(0, etag_string, '')
+    upload_to_google_storage.upload_to_google_storage(
+        filenames, self.base_url, self.gsutil, False, False, 1, False)
+    self.assertEquals(
+        self.gsutil.history,
+        [('check_call',
+          ('ls', '%s/%s' % (self.base_url, self.lorem_ipsum_sha1))),
+         ('check_call',
+          ('ls', '-L', '%s/%s' % (self.base_url, self.lorem_ipsum_sha1)))])
+    self.assertTrue(os.path.exists(output_filename))
+    self.assertEquals(
+        open(output_filename, 'rb').read(),
+        '7871c8e24da15bad8b0be2c36edc9dc77e37727f')
+    os.remove(output_filename)
+
+  def test_upload_worker_errors(self):
+    work_queue = Queue.Queue()
+    work_queue.put((self.lorem_ipsum, self.lorem_ipsum_sha1))
+    work_queue.put((None, None))
+    self.gsutil.add_expected(1, '', '')  # For the first ls call.
+    self.gsutil.add_expected(20, '', 'Expected error message')
+    # pylint: disable=W0212
+    upload_to_google_storage._upload_worker(
+        0,
+        work_queue,
+        self.base_url,
+        self.gsutil,
+        threading.Lock(),
+        False,
+        False,
+        self.ret_codes)
+    expected_ret_codes = [
+      (20,
+       'Encountered error on uploading %s to %s/%s\nExpected error message' %
+          (self.lorem_ipsum, self.base_url, self.lorem_ipsum_sha1))]
+    self.assertEquals(list(self.ret_codes.queue), expected_ret_codes)
+
+
+  def test_skip_hashing(self):
+    filenames = [self.lorem_ipsum]
+    output_filename = '%s.sha1' % self.lorem_ipsum
+    fake_hash = '6871c8e24da15bad8b0be2c36edc9dc77e37727f'
+    with open(output_filename, 'wb') as f:
+      f.write(fake_hash)  # Fake hash.
+    upload_to_google_storage.upload_to_google_storage(
+        filenames, self.base_url, self.gsutil, False, False, 1, True)
+    self.assertEquals(
+        self.gsutil.history,
+        [('check_call',
+          ('ls', '%s/%s' % (self.base_url, fake_hash))),
+         ('check_call',
+          ('ls', '-L', '%s/%s' % (self.base_url, fake_hash))),
+         ('check_call',
+          ('cp', '-q', filenames[0], '%s/%s' % (self.base_url, fake_hash)))])
+    self.assertEquals(
+        open(output_filename, 'rb').read(), fake_hash)
+    os.remove(output_filename)
+
+  def test_get_targets_no_args(self):
+    try:
+      upload_to_google_storage.get_targets([], self.parser, False)
+    except SystemExit, e:
+      self.assertEquals(type(e), type(SystemExit()))
+      self.assertEquals(e.code, 2)
+    except Exception, e:
+      self.fail('unexpected exception: %s' % e)
+    else:
+      self.fail('SystemExit exception expected')
+
+  def test_get_targets_passthrough(self):
+    result = upload_to_google_storage.get_targets(
+        ['a', 'b', 'c', 'd', 'e'],
+        self.parser,
+        False)
+    self.assertEquals(result, ['a', 'b', 'c', 'd', 'e'])
+
+  def test_get_targets_multiple_stdin(self):
+    inputs = ['a', 'b', 'c', 'd', 'e']
+    sys.stdin = StringIO.StringIO(os.linesep.join(inputs))
+    result = upload_to_google_storage.get_targets(
+        ['-'],
+        self.parser,
+        False)
+    self.assertEquals(result, inputs)
+
+  def test_get_targets_multiple_stdin_null(self):
+    inputs = ['a', 'b', 'c', 'd', 'e']
+    sys.stdin = StringIO.StringIO('\0'.join(inputs))
+    result = upload_to_google_storage.get_targets(
+        ['-'],
+        self.parser,
+        True)
+    self.assertEquals(result, inputs)
+
+
+class DownloadTests(unittest.TestCase):
+  def setUp(self):
+    self.gsutil = GsutilMock(GSUTIL_DEFAULT_PATH)
+    self.base_path = os.path.join(
+        os.path.dirname(os.path.abspath(__file__)),
+        'gstools',
+        'download_test_data')
+    self.base_url = 'gs://sometesturl'
+    self.parser = optparse.OptionParser()
+    self.queue = Queue.Queue()
+    self.lorem_ipsum = os.path.join(self.base_path, 'lorem_ipsum.txt')
+    self.lorem_ipsum_sha1 = '7871c8e24da15bad8b0be2c36edc9dc77e37727f'
+    self.maxDiff = None
+
+  def test_enumerate_files_non_recursive(self):
+    queue_size = download_from_google_storage.enumerate_work_queue(
+        self.base_path, self.queue, True, False, False, None, False)
+    result = list(self.queue.queue)
+    expected_queue = [
+        ('e6c4fbd4fe7607f3e6ebf68b2ea4ef694da7b4fe',
+            os.path.join(self.base_path, 'rootfolder_text.txt')),
+       ('7871c8e24da15bad8b0be2c36edc9dc77e37727f',
+            os.path.join(self.base_path, 'uploaded_lorem_ipsum.txt'))]
+    for item in result:
+      self.assertTrue(item in expected_queue)
+    self.assertEquals(queue_size, 2)
+
+  def test_enumerate_files_recursive(self):
+    queue_size = download_from_google_storage.enumerate_work_queue(
+        self.base_path, self.queue, True, True, False, None, False)
+    expected_queue = [
+        ('e6c4fbd4fe7607f3e6ebf68b2ea4ef694da7b4fe',
+            os.path.join(self.base_path, 'rootfolder_text.txt')),
+        ('7871c8e24da15bad8b0be2c36edc9dc77e37727f',
+            os.path.join(self.base_path, 'uploaded_lorem_ipsum.txt')),
+        ('b5415aa0b64006a95c0c409182e628881d6d6463',
+            os.path.join(self.base_path, 'subfolder', 'subfolder_text.txt'))]
+    result = list(self.queue.queue)
+    for item in result:
+      self.assertTrue(item in expected_queue)
+    self.assertEquals(queue_size, 3)
+
+  def test_download_worker_single_file(self):
+    sha1_hash = '7871c8e24da15bad8b0be2c36edc9dc77e37727f'
+    input_filename = '%s/%s' % (self.base_url, sha1_hash)
+    output_filename = os.path.join(self.base_path, 'uploaded_lorem_ipsum.txt')
+    self.queue.put((sha1_hash, output_filename))
+    self.queue.put((None, None))
+    stdout_queue = Queue.Queue()
+    # pylint: disable=W0212
+    download_from_google_storage._downloader_worker_thread(
+        0, self.queue, False, self.base_url, self.gsutil, stdout_queue)
+    expected_calls = [
+        ('check_call',
+            ('ls', input_filename)),
+        ('check_call',
+            ('cp', '-q', input_filename, output_filename))]
+    expected_output = [
+        'Downloading %s to %s...' % (input_filename, output_filename),
+        'Thread 0 is done']
+    self.assertEquals(list(stdout_queue.queue), expected_output)
+    self.assertEquals(self.gsutil.history, expected_calls)
+
+  def test_download_worker_skips_file(self):
+    sha1_hash = 'e6c4fbd4fe7607f3e6ebf68b2ea4ef694da7b4fe'
+    output_filename = os.path.join(self.base_path, 'rootfolder_text.txt')
+    self.queue.put((sha1_hash, output_filename))
+    self.queue.put((None, None))
+    stdout_queue = Queue.Queue()
+    # pylint: disable=W0212
+    download_from_google_storage._downloader_worker_thread(
+        0, self.queue, False, self.base_url, self.gsutil, stdout_queue)
+    expected_output = [
+        'File %s exists and SHA1 sum (%s) matches. Skipping.' %
+            (output_filename, sha1_hash),
+        'Thread 0 is done'
+    ]
+    self.assertEquals(list(stdout_queue.queue), expected_output)
+    self.assertEquals(self.gsutil.history, [])
+
+  def test_download_worker_skips_not_found_file(self):
+    sha1_hash = '7871c8e24da15bad8b0be2c36edc9dc77e37727f'
+    input_filename = '%s/%s' % (self.base_url, sha1_hash)
+    output_filename = os.path.join(self.base_path, 'uploaded_lorem_ipsum.txt')
+    self.queue.put((sha1_hash, output_filename))
+    self.queue.put((None, None))
+    stdout_queue = Queue.Queue()
+    self.gsutil.add_expected(1, '', '')  # Return error when 'ls' is called.
+    # pylint: disable=W0212
+    download_from_google_storage._downloader_worker_thread(
+        0, self.queue, False, self.base_url, self.gsutil, stdout_queue)
+    expected_output = [
+        'File %s for %s does not exist, skipping.' % (
+            input_filename, output_filename),
+        'Thread 0 is done'
+    ]
+    expected_calls = [
+        ('check_call',
+            ('ls', input_filename))
+    ]
+    self.assertEquals(list(stdout_queue.queue), expected_output)
+    self.assertEquals(self.gsutil.history, expected_calls)
+
+  def test_download_directory_no_recursive_non_force(self):
+    sha1_hash = '7871c8e24da15bad8b0be2c36edc9dc77e37727f'
+    input_filename = '%s/%s' % (self.base_url, sha1_hash)
+    output_filename = os.path.join(self.base_path, 'uploaded_lorem_ipsum.txt')
+    download_from_google_storage.download_from_google_storage(
+        input_filename=self.base_path,
+        base_url=self.base_url,
+        gsutil=self.gsutil,
+        num_threads=1,
+        directory=True,
+        recursive=False,
+        force=False,
+        output=None,
+        ignore_errors=False,
+        sha1_file=False)
+    expected_calls = [
+        ('check_call',
+            ('ls', input_filename)),
+        ('check_call',
+            ('cp', '-q', input_filename, output_filename))]
+    self.assertEquals(self.gsutil.history, expected_calls)
+
+
+if __name__ == '__main__':
+  unittest.main()