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diff --git a/‎dlp/deid.py
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diff --git a/‎dlp/deid_test.py
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+# Copyright 2017 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the 'License');
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an 'AS IS' BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import shutil
+import tempfile
+
+import pytest
+
+import deid
+
+HARMFUL_STRING = 'My SSN is 372819127'
+HARMLESS_STRING = 'My favorite color is blue'
+GCLOUD_PROJECT = os.getenv('GCLOUD_PROJECT')
+WRAPPED_KEY = ('CiQAz0hX4+go8fJwn80Fr8pVImwx+tmZdqU7JL+7TN/S5JxBU9gSSQDhFHpFVy'
+               'uzJps0YH9ls480mU+JLG7jI/0lL04i6XJRWqmI6gUSZRUtECYcLH5gXK4SXHlL'
+               'rotx7Chxz/4z7SIpXFOBY61z0/U=')
+KEY_NAME = ('projects/python-docs-samples-tests/locations/global/keyRings/'
+            'dlp-test/cryptoKeys/dlp-test')
+SURROGATE_TYPE = 'SSN_TOKEN'
+CSV_FILE = os.path.join(os.path.dirname(__file__), 'resources/dates.csv')
+DATE_SHIFTED_AMOUNT = 30
+DATE_FIELDS = ['birth_date', 'register_date']
+CSV_CONTEXT_FIELD = 'name'
+
+
+@pytest.fixture(scope='module')
+def tempdir():
+    tempdir = tempfile.mkdtemp()
+    yield tempdir
+    shutil.rmtree(tempdir)
+
+
+def test_deidentify_with_mask(capsys):
+    deid.deidentify_with_mask(GCLOUD_PROJECT, HARMFUL_STRING)
+
+    out, _ = capsys.readouterr()
+    assert 'My SSN is *********' in out
+
+
+def test_deidentify_with_mask_ignore_insensitive_data(capsys):
+    deid.deidentify_with_mask(GCLOUD_PROJECT, HARMLESS_STRING)
+
+    out, _ = capsys.readouterr()
+    assert HARMLESS_STRING in out
+
+
+def test_deidentify_with_mask_masking_character_specified(capsys):
+    deid.deidentify_with_mask(
+        GCLOUD_PROJECT,
+        HARMFUL_STRING,
+        masking_character='#')
+
+    out, _ = capsys.readouterr()
+    assert 'My SSN is #########' in out
+
+
+def test_deidentify_with_mask_masking_number_specified(capsys):
+    deid.deidentify_with_mask(GCLOUD_PROJECT, HARMFUL_STRING, number_to_mask=7)
+
+    out, _ = capsys.readouterr()
+    assert 'My SSN is *******27' in out
+
+
+def test_deidentify_with_fpe(capsys):
+    deid.deidentify_with_fpe(
+        GCLOUD_PROJECT,
+        HARMFUL_STRING,
+        alphabet='NUMERIC',
+        wrapped_key=WRAPPED_KEY,
+        key_name=KEY_NAME)
+
+    out, _ = capsys.readouterr()
+    assert 'My SSN is' in out
+    assert '372819127' not in out
+
+
+def test_deidentify_with_fpe_uses_surrogate_info_types(capsys):
+    deid.deidentify_with_fpe(
+        GCLOUD_PROJECT,
+        HARMFUL_STRING,
+        alphabet='NUMERIC',
+        wrapped_key=WRAPPED_KEY,
+        key_name=KEY_NAME,
+        surrogate_type=SURROGATE_TYPE)
+
+    out, _ = capsys.readouterr()
+    assert 'My SSN is SSN_TOKEN' in out
+    assert '372819127' not in out
+
+
+def test_deidentify_with_fpe_ignores_insensitive_data(capsys):
+    deid.deidentify_with_fpe(
+        GCLOUD_PROJECT,
+        HARMLESS_STRING,
+        alphabet='NUMERIC',
+        wrapped_key=WRAPPED_KEY,
+        key_name=KEY_NAME)
+
+    out, _ = capsys.readouterr()
+    assert HARMLESS_STRING in out
+
+
+def test_deidentify_with_date_shift(tempdir, capsys):
+    output_filepath = os.path.join(tempdir, 'dates-shifted.csv')
+
+    deid.deidentify_with_date_shift(
+        GCLOUD_PROJECT,
+        input_csv_file=CSV_FILE,
+        output_csv_file=output_filepath,
+        lower_bound_days=DATE_SHIFTED_AMOUNT,
+        upper_bound_days=DATE_SHIFTED_AMOUNT,
+        date_fields=DATE_FIELDS)
+
+    out, _ = capsys.readouterr()
+
+    assert 'Successful' in out
+
+
+def test_deidentify_with_date_shift_using_context_field(tempdir, capsys):
+    output_filepath = os.path.join(tempdir, 'dates-shifted.csv')
+
+    deid.deidentify_with_date_shift(
+        GCLOUD_PROJECT,
+        input_csv_file=CSV_FILE,
+        output_csv_file=output_filepath,
+        lower_bound_days=DATE_SHIFTED_AMOUNT,
+        upper_bound_days=DATE_SHIFTED_AMOUNT,
+        date_fields=DATE_FIELDS,
+        context_field_id=CSV_CONTEXT_FIELD,
+        wrapped_key=WRAPPED_KEY,
+        key_name=KEY_NAME)
+
+    out, _ = capsys.readouterr()
+
+    assert 'Successful' in out
+
+
+def test_reidentify_with_fpe(capsys):
+    labeled_fpe_string = 'My SSN is SSN_TOKEN(9):731997681'
+
+    deid.reidentify_with_fpe(
+        GCLOUD_PROJECT,
+        labeled_fpe_string,
+        surrogate_type=SURROGATE_TYPE,
+        wrapped_key=WRAPPED_KEY,
+        key_name=KEY_NAME,
+        alphabet='NUMERIC')
+
+    out, _ = capsys.readouterr()
+
+    assert '731997681' not in out