chore: add prerelease nox session (#281)

* chore(python): add missing import for prerelease testing

Source-Link: googleapis/synthtool@d2871d9
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:b2dc5f80edcf5d4486c39068c9fa11f7f851d9568eea4dcba130f994ea9b5e97

* check samples failure

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* lint

* check samples failure

* add 30 seconds to request timestamp

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <partheniou@google.com>

packages/google-cloud-retail/.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:81ed5ecdfc7cac5b699ba4537376f3563f6f04122c4ec9e735d3b3dc1d43dd32
-# created: 2022-05-05T22:08:23.383410683Z
+  digest: sha256:b2dc5f80edcf5d4486c39068c9fa11f7f851d9568eea4dcba130f994ea9b5e97
+# created: 2022-06-12T16:09:31.61859086Z

packages/google-cloud-retail/.kokoro/continuous/prerelease-deps.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "prerelease_deps"
+}

packages/google-cloud-retail/.kokoro/presubmit/prerelease-deps.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "prerelease_deps"
+}

packages/google-cloud-retail/noxfile.py

@@ -20,6 +20,7 @@
 
 import os
 import pathlib
+import re
 import shutil
 import warnings
 
@@ -325,3 +326,67 @@ def docfx(session):
         os.path.join("docs", ""),
         os.path.join("docs", "_build", "html", ""),
     )
+
+
+@nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS)
+def prerelease_deps(session):
+    """Run all tests with prerelease versions of dependencies installed."""
+
+    prerel_deps = [
+        "protobuf",
+        "googleapis-common-protos",
+        "google-auth",
+        "grpcio",
+        "grpcio-status",
+        "google-api-core",
+        "proto-plus",
+        # dependencies of google-auth
+        "cryptography",
+        "pyasn1",
+    ]
+
+    for dep in prerel_deps:
+        session.install("--pre", "--no-deps", "--upgrade", dep)
+
+    # Remaining dependencies
+    other_deps = ["requests"]
+    session.install(*other_deps)
+
+    session.install(*UNIT_TEST_STANDARD_DEPENDENCIES)
+    session.install(*SYSTEM_TEST_STANDARD_DEPENDENCIES)
+
+    # Because we test minimum dependency versions on the minimum Python
+    # version, the first version we test with in the unit tests sessions has a
+    # constraints file containing all dependencies and extras.
+    with open(
+        CURRENT_DIRECTORY
+        / "testing"
+        / f"constraints-{UNIT_TEST_PYTHON_VERSIONS[0]}.txt",
+        encoding="utf-8",
+    ) as constraints_file:
+        constraints_text = constraints_file.read()
+
+    # Ignore leading whitespace and comment lines.
+    deps = [
+        match.group(1)
+        for match in re.finditer(
+            r"^\s*(\S+)(?===\S+)", constraints_text, flags=re.MULTILINE
+        )
+    ]
+
+    # Don't overwrite prerelease packages.
+    deps = [dep for dep in deps if dep not in prerel_deps]
+    # We use --no-deps to ensure that pre-release versions aren't overwritten
+    # by the version ranges in setup.py.
+    session.install(*deps)
+    session.install("--no-deps", "-e", ".[all]")
+
+    # Print out prerelease package versions
+    session.run(
+        "python", "-c", "import google.protobuf; print(google.protobuf.__version__)"
+    )
+    session.run("python", "-c", "import grpc; print(grpc.__version__)")
+
+    session.run("py.test", "tests/unit")
+    session.run("py.test", "tests/system")
+    session.run("py.test", "samples/snippets")

packages/google-cloud-retail/samples/interactive-tutorials/product/add_fulfillment_places.py

@@ -32,9 +32,6 @@
     + product_id
 )
 
-# The request timestamp
-current_date = datetime.datetime.now()
-
 
 # add fulfillment request
 def get_add_fulfillment_request(
@@ -70,6 +67,9 @@ def add_fulfillment_places(product_name: str, timestamp, place_id):
 
 
 create_product(product_id)
+
+# The request timestamp
+current_date = datetime.datetime.now() + datetime.timedelta(seconds=30)
 print(f"------add fulfilment places with current date: {current_date}-----")
 add_fulfillment_places(product_name, current_date, "store2")
 get_product(product_name)

packages/google-cloud-retail/samples/interactive-tutorials/product/set_inventory.py

@@ -64,7 +64,7 @@ def get_product_with_inventory_info(product_name: str) -> Product:
 # set inventory request
 def get_set_inventory_request(product_name: str) -> SetInventoryRequest:
     # The request timestamp
-    request_time = datetime.datetime.now()
+    request_time = datetime.datetime.now() + datetime.timedelta(seconds=30)
     set_mask = FieldMask(
         paths=["price_info", "availability", "fulfillment_info", "available_quantity"]
     )