test: do not try to test with emulator if java not present (#473)

* test: do not try to test with emulator if java not present

Author: crwilcox

packages/google-cloud-firestore/noxfile.py

@@ -134,6 +134,13 @@ def system_emulated(session):
     import subprocess
     import signal
 
+    try:
+        # https://github.com/googleapis/python-firestore/issues/472
+        # Kokoro image doesn't have java installed, don't attempt to run emulator.
+        subprocess.call(["java", "--version"])
+    except OSError:
+        session.skip("java not found but required for emulator support")
+
     try:
         subprocess.call(["gcloud", "--version"])
     except OSError:

packages/google-cloud-firestore/owlbot.py

@@ -161,6 +161,13 @@ def system_emulated(session):
     import subprocess
     import signal
 
+    try:
+        # https://github.com/googleapis/python-firestore/issues/472
+        # Kokoro image doesn't have java installed, don't attempt to run emulator.
+        subprocess.call(["java", "--version"])
+    except OSError:
+        session.skip("java not found but required for emulator support")
+
     try:
         subprocess.call(["gcloud", "--version"])
     except OSError: