test: add php post-processor tests (googleapis#1890)

* test: add php post-processor tests

* test: remove e2e test case

* chore: fix copy/paste typo

* build: make owlbot-php-presubmit required check

.github/sync-repo-settings.yaml

@@ -9,6 +9,7 @@ branchProtectionRules:
     - 'owlbot-nodejs-mono-repo-presubmit (repo-automation-bots)'
     - 'owlbot-nodejs-presubmit (repo-automation-bots)'
     - 'owlbot-java-presubmit (repo-automation-bots)'
+    - 'owlbot-php-presubmit (repo-automation-bots)'
   requiredApprovingReviewCount: 1
   requiresCodeOwnerReviews: true
   requiresStrictStatusChecks: true

docker/owlbot/php/cloudbuild_test.yaml

@@ -0,0 +1,31 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+steps:
+  # Write the latest commit message to a file in the workspace.
+  - name: 'gcr.io/cloud-builders/git'
+    entrypoint: '/bin/sh'
+    args:
+      - '-c'
+      - 'git log -1 --format="%s%n%n%b%nSource-Link: https://github.com/googleapis/synthtool/commit/%H" > post-processor-changes.txt'
+  # Build the docker image.
+  - name: "gcr.io/cloud-builders/docker"
+    args: [ "build",
+      "-t", "gcr.io/$PROJECT_ID/owlbot-php:$SHORT_SHA",
+      "-t", "gcr.io/$PROJECT_ID/owlbot-php:latest",
+      "-f", "docker/owlbot/php/Dockerfile", "." ]
+    id: "build"
+  - name: gcr.io/gcp-runtimes/container-structure-test
+    args:
+      ["test", "--image", "gcr.io/$PROJECT_ID/owlbot-php:$SHORT_SHA", "--config", "docker/owlbot/php/container_test.yaml"]
+    waitFor: ["build"]

docker/owlbot/php/container_test.yaml

@@ -0,0 +1,28 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
+schemaVersion: 2.0.0
+commandTests:
+- name: "python"
+  command: "python"
+  args: ["--version"]
+  expectedOutput: ["Python 3.10.6"]
+- name: "php synthtool validation"
+  command: "python"
+  # Use YAML List Style for this command
+  # Having to use backslash for quotes (\") was resulting in an invalid test
+  args:
+    - -c
+    - 'import synthtool.languages.php; print("import success")'
+  expectedOutput: ["import success"]