chore: add unit tests for generate_library.sh (#1964)

* chore: add unit tests for `generate_library.sh`

* add os types in unit tests

* add more tests

* fix broken test

* use `uname` to get os info

* split generate library golden tests

* change library

* add script level comments

* remove golden tests

* remove golden test in ci

* change proto path

* remove unused parameter

* set x separately

Author: JoeWang1127

.github/workflows/verify_library_generation.yaml

@@ -31,7 +31,11 @@ jobs:
         --googleapis_gen_url https://cloud-java-bot:${{ secrets.CLOUD_JAVA_BOT_GITHUB_TOKEN }}@github.com/googleapis/googleapis-gen.git \
         --os_type ${{ matrix.os }}
   unit_tests:
-    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        java: [ 8 ]
+        os: [ ubuntu-22.04, macos-12 ]
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3
     - name: Run unit tests

library_generation/README.md

@@ -124,4 +124,3 @@ library_generation/generate_library.sh \
 --rest_numeric_enums true \
 --include_samples true
 ```
-