From 19908edcd8a3df1db41e34100acc1f15c3c99397 Mon Sep 17 00:00:00 2001
From: arithmetic1728 <58957152+arithmetic1728@users.noreply.github.com>
Date: Tue, 9 Jun 2020 22:32:43 -0700
Subject: [PATCH 1/2] fix: update GOOGLE_API_USE_MTLS values (#940)

---
 googleapiclient/discovery.py | 14 +++++++-------
 tests/test_discovery.py      | 20 ++++++++++----------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/googleapiclient/discovery.py b/googleapiclient/discovery.py
index 55367c0a491..f12b04f3ad7 100644
--- a/googleapiclient/discovery.py
+++ b/googleapiclient/discovery.py
@@ -471,17 +471,17 @@ def build_from_document(
             not client_options or not client_options.api_endpoint
         ):
             mtls_endpoint = urljoin(service["mtlsRootUrl"], service["servicePath"])
-            use_mtls_env = os.getenv("GOOGLE_API_USE_MTLS", "Never")
+            use_mtls_env = os.getenv("GOOGLE_API_USE_MTLS", "never")
 
-            if not use_mtls_env in ("Never", "Auto", "Always"):
+            if not use_mtls_env in ("never", "auto", "always"):
                 raise MutualTLSChannelError(
-                    "Unsupported GOOGLE_API_USE_MTLS value. Accepted values: Never, Auto, Always"
+                    "Unsupported GOOGLE_API_USE_MTLS value. Accepted values: never, auto, always"
                 )
 
-            # Switch to mTLS endpoint, if environment variable is "Always", or
-            # environment varibable is "Auto" and client cert exists.
-            if use_mtls_env == "Always" or (
-                use_mtls_env == "Auto" and client_cert_to_use
+            # Switch to mTLS endpoint, if environment variable is "always", or
+            # environment varibable is "auto" and client cert exists.
+            if use_mtls_env == "always" or (
+                use_mtls_env == "auto" and client_cert_to_use
             ):
                 base = mtls_endpoint
 
diff --git a/tests/test_discovery.py b/tests/test_discovery.py
index 9015066006a..d6cd9e1d1f3 100644
--- a/tests/test_discovery.py
+++ b/tests/test_discovery.py
@@ -590,9 +590,9 @@ def test_exception_with_client_cert_source(self):
 
     @parameterized.expand(
         [
-            ("Never", REGULAR_ENDPOINT),
-            ("Auto", MTLS_ENDPOINT),
-            ("Always", MTLS_ENDPOINT),
+            ("never", REGULAR_ENDPOINT),
+            ("auto", MTLS_ENDPOINT),
+            ("always", MTLS_ENDPOINT),
         ]
     )
     def test_mtls_with_provided_client_cert(self, use_mtls_env, base_url):
@@ -610,7 +610,7 @@ def test_mtls_with_provided_client_cert(self, use_mtls_env, base_url):
             self.check_http_client_cert(plus, has_client_cert=True)
             self.assertEqual(plus._baseUrl, base_url)
 
-    @parameterized.expand(["Never", "Auto", "Always"])
+    @parameterized.expand(["never", "auto", "always"])
     def test_endpoint_not_switch(self, use_mtls_env):
         # Test endpoint is not switched if user provided api endpoint
         discovery = open(datafile("plus.json")).read()
@@ -630,9 +630,9 @@ def test_endpoint_not_switch(self, use_mtls_env):
 
     @parameterized.expand(
         [
-            ("Never", REGULAR_ENDPOINT),
-            ("Auto", MTLS_ENDPOINT),
-            ("Always", MTLS_ENDPOINT),
+            ("never", REGULAR_ENDPOINT),
+            ("auto", MTLS_ENDPOINT),
+            ("always", MTLS_ENDPOINT),
         ]
     )
     @mock.patch(
@@ -667,9 +667,9 @@ def test_mtls_with_default_client_cert(
 
     @parameterized.expand(
         [
-            ("Never", REGULAR_ENDPOINT),
-            ("Auto", REGULAR_ENDPOINT),
-            ("Always", MTLS_ENDPOINT),
+            ("never", REGULAR_ENDPOINT),
+            ("auto", REGULAR_ENDPOINT),
+            ("always", MTLS_ENDPOINT),
         ]
     )
     @mock.patch(

From cc83ec24849cf4a004a7fbe612ad05e5806c68d3 Mon Sep 17 00:00:00 2001
From: "release-please[bot]"
 <55107282+release-please[bot]@users.noreply.github.com>
Date: Wed, 10 Jun 2020 19:31:19 -0700
Subject: [PATCH 2/2] chore: release 1.9.3 (#941)

* updated CHANGELOG.md [ci skip]

* updated setup.py

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
---
 CHANGELOG.md | 7 +++++++
 setup.py     | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8516e745aa1..fa4ed3074eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [1.9.3](https://www.github.com/googleapis/google-api-python-client/compare/v1.9.2...v1.9.3) (2020-06-10)
+
+
+### Bug Fixes
+
+* update GOOGLE_API_USE_MTLS values ([#940](https://www.github.com/googleapis/google-api-python-client/issues/940)) ([19908ed](https://www.github.com/googleapis/google-api-python-client/commit/19908edcd8a3df1db41e34100acc1f15c3c99397))
+
 ### [1.9.2](https://www.github.com/googleapis/google-api-python-client/compare/v1.9.1...v1.9.2) (2020-06-04)
 
 
diff --git a/setup.py b/setup.py
index 31215eb8c9b..22c6cf4a5ff 100644
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@
 with io.open(readme_filename, encoding="utf-8") as readme_file:
     readme = readme_file.read()
 
-version = "1.9.2"
+version = "1.9.3"
 
 setup(
     name="google-api-python-client",