Chore: Print runtime env for integration tests (#1865)

* Print runtime env for integration tests

* 🦉 Updates from OwlBot post-processor

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

* add new kokoro job

* Add tests to package.json

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---------

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

Author: wu-hui

dev/system-test/firestore.ts

@@ -77,6 +77,22 @@ class DeferredPromise<T> {
   }
 }
 
+const firestoreEnv: {
+  [key: string]: string | undefined;
+} = {};
+for (const key in process.env) {
+  if (key.startsWith('FIRESTORE')) {
+    firestoreEnv[key] = process.env[key];
+  }
+}
+console.log(
+  `Running system tests with environment variables:\n ${JSON.stringify(
+    firestoreEnv,
+    null,
+    2
+  )}`
+);
+
 if (process.env.NODE_ENV === 'DEBUG') {
   setLogFunction(console.log);
 }

package.json

@@ -31,11 +31,15 @@
     "predocs": "npm run compile",
     "docs": "jsdoc -c .jsdoc.js",
     "system-test:rest": "FIRESTORE_PREFER_REST=true mocha build/system-test --timeout 600000",
+    "system-test:named-db:rest": "FIRESTORE_NAMED_DATABASE=test-db FIRESTORE_PREFER_REST=true mocha build/system-test --timeout 600000",
     "system-test:grpc": "mocha build/system-test --timeout 600000",
+    "system-test:named-db:grpc": "FIRESTORE_NAMED_DATABASE=test-db mocha build/system-test --timeout 600000",
     "system-test:emulator:rest": "FIRESTORE_EMULATOR_HOST=localhost:8080 FIRESTORE_PREFER_REST=true mocha build/system-test --timeout 600000",
+    "system-test:named-db:emulator:rest": "FIRESTORE_NAMED_DATABASE=test-db FIRESTORE_EMULATOR_HOST=localhost:8080 FIRESTORE_PREFER_REST=true mocha build/system-test --timeout 600000",
     "system-test:emulator:grpc": "FIRESTORE_EMULATOR_HOST=localhost:8080 mocha build/system-test --timeout 600000",
-    "system-test": "npm run system-test:grpc && npm run system-test:rest",
-    "system-test:emulator": "npm run system-test:emulator:grpc && npm run system-test:emulator:rest",
+    "system-test:named-db:emulator:grpc": "FIRESTORE_NAMED_DATABASE=test-db FIRESTORE_EMULATOR_HOST=localhost:8080 mocha build/system-test --timeout 600000",
+    "system-test": "npm run system-test:grpc && npm run system-test:rest && npm run system-test:named-db:grpc && npm run system-test:named-db:rest",
+    "system-test:emulator": "npm run system-test:emulator:grpc && npm run system-test:emulator:rest && npm run system-test:named-db:emulator:grpc && npm run system-test:named-db:emulator:rest",
     "presystem-test": "npm run compile",
     "samples-test": "npm link && cd samples/ && npm link ../ && npm test && cd ../",
     "conformance": "mocha build/conformance",