test: run integration tests against emulator (#310)

* test: run integration tests against emulator

* tests: close Spanner after test finishes

* tests: do not close Spanner twice

* chore: run formatter

.github/workflows/integration-tests-against-emulator.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Copyright 2020 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..
+
+# Fail on any error
+set -e
+
+# Display commands being run
+set -x
+
+export SPANNER_EMULATOR_HOST=localhost:9010
+export GOOGLE_CLOUD_PROJECT=emulator-test-project
+echo "Running the Cloud Spanner emulator: $SPANNER_EMULATOR_HOST";
+
+# Download the emulator
+EMULATOR_VERSION=0.8.0
+wget https://storage.googleapis.com/cloud-spanner-emulator/releases/${EMULATOR_VERSION}/cloud-spanner-emulator_linux_amd64-${EMULATOR_VERSION}.tar.gz
+tar zxvf cloud-spanner-emulator_linux_amd64-${EMULATOR_VERSION}.tar.gz
+chmod u+x emulator_main
+
+# Start the emulator
+./emulator_main --host_port $SPANNER_EMULATOR_HOST &
+
+EMULATOR_PID=$!
+
+# Stop the emulator & clean the environment variable
+trap "kill -15 $EMULATOR_PID; unset SPANNER_EMULATOR_HOST; unset GOOGLE_CLOUD_PROJECT; echo \"Cleanup the emulator\";" EXIT
+
+mvn -B -Dspanner.testenv.instance="" \
+  -Penable-integration-tests \
+  -DtrimStackTrace=false \
+  -Dclirr.skip=true \
+  -Denforcer.skip=true \
+  -fae \
+  verify

.github/workflows/integration-tests-against-emulator.yaml

@@ -0,0 +1,19 @@
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+name: integration-tests-against-emulator
+jobs:
+  units:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - run: java -version
+    - run: .kokoro/build.sh
+    - run: sh .github/workflows/integration-tests-against-emulator.sh
+      env:
+        JOB_TYPE: test

google-cloud-spanner/src/main/java/com/google/cloud/spanner/testing/RemoteSpannerHelper.java

@@ -129,7 +129,6 @@ public void cleanUp() {
       }
     }
     logger.log(Level.INFO, "Dropped {0} test database(s)", numDropped);
-    client.close();
   }
 
   /**

google-cloud-spanner/src/test/java/com/google/cloud/spanner/IntegrationTestEnv.java

@@ -162,17 +162,22 @@ private void initializeInstance(InstanceId instanceId) {
   }
 
   private void cleanUpInstance() {
-    if (isOwnedInstance) {
-      // Delete the instance, which implicitly drops all databases in it.
-      try {
-        logger.log(Level.FINE, "Deleting test instance {0}", testHelper.getInstanceId());
-        instanceAdminClient.deleteInstance(testHelper.getInstanceId().getInstance());
-        logger.log(Level.INFO, "Deleted test instance {0}", testHelper.getInstanceId());
-      } catch (SpannerException e) {
-        logger.log(Level.SEVERE, "Failed to delete test instance " + testHelper.getInstanceId(), e);
+    try {
+      if (isOwnedInstance) {
+        // Delete the instance, which implicitly drops all databases in it.
+        try {
+          logger.log(Level.FINE, "Deleting test instance {0}", testHelper.getInstanceId());
+          instanceAdminClient.deleteInstance(testHelper.getInstanceId().getInstance());
+          logger.log(Level.INFO, "Deleted test instance {0}", testHelper.getInstanceId());
+        } catch (SpannerException e) {
+          logger.log(
+              Level.SEVERE, "Failed to delete test instance " + testHelper.getInstanceId(), e);
+        }
+      } else {
+        testHelper.cleanUp();
       }
-    } else {
-      testHelper.cleanUp();
+    } finally {
+      testHelper.getClient().close();
     }
   }
 

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/ITAbstractSpannerTest.java

@@ -16,6 +16,7 @@
 
 package com.google.cloud.spanner.connection;
 
+import com.google.cloud.NoCredentials;
 import com.google.cloud.spanner.Database;
 import com.google.cloud.spanner.ErrorCode;
 import com.google.cloud.spanner.GceTestEnvConfig;
@@ -39,6 +40,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Random;
+import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.ClassRule;
@@ -177,6 +179,9 @@ public static StringBuilder extractConnectionUrl(SpannerOptions options, Databas
       url.append(options.getHost().substring(options.getHost().indexOf(':') + 1));
     }
     url.append("/").append(database.getId().getName());
+    if (options.getCredentials() == NoCredentials.getInstance()) {
+      url.append(";usePlainText=true");
+    }
     return url;
   }
 
@@ -185,6 +190,11 @@ public static void setup() {
     database = env.getTestHelper().createTestDatabase();
   }
 
+  @AfterClass
+  public static void teardown() {
+    ConnectionOptions.closeSpanner();
+  }
+
   /**
    * Creates a new default connection to a test database. Use the method {@link
    * ITAbstractSpannerTest#appendConnectionUri(StringBuilder)} to append additional connection

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/it/ITBulkConnectionTest.java

@@ -20,7 +20,7 @@
 import static org.hamcrest.CoreMatchers.notNullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
 
-import com.google.cloud.spanner.ParallelIntegrationTest;
+import com.google.cloud.spanner.IntegrationTest;
 import com.google.cloud.spanner.ResultSet;
 import com.google.cloud.spanner.Statement;
 import com.google.cloud.spanner.connection.ITAbstractSpannerTest;
@@ -35,8 +35,12 @@
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
-/** Test opening multiple generic (not JDBC) Spanner connections. */
-@Category(ParallelIntegrationTest.class)
+/**
+ * Test opening multiple generic (not JDBC) Spanner connections. This test should not be run in
+ * parallel with other tests, as it tries to close all active connections, and should not try to
+ * close connections of other integration tests.
+ */
+@Category(IntegrationTest.class)
 @RunWith(JUnit4.class)
 public class ITBulkConnectionTest extends ITAbstractSpannerTest {
   private static final int NUMBER_OF_TEST_CONNECTIONS = 250;

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/it/ITReadOnlySpannerTest.java

@@ -22,6 +22,7 @@
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeFalse;
 
 import com.google.cloud.spanner.ErrorCode;
 import com.google.cloud.spanner.Mutation;
@@ -168,6 +169,7 @@ public void testStatementTimeoutAutocommit() {
 
   @Test
   public void testAnalyzeQuery() {
+    assumeFalse("analyze query is not supported on the emulator", env.getTestHelper().isEmulator());
     try (ITConnection connection = createConnection()) {
       for (QueryAnalyzeMode mode : QueryAnalyzeMode.values()) {
         try (ResultSet rs =

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/it/ITSqlMusicScriptTest.java

@@ -19,6 +19,7 @@
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assume.assumeFalse;
 
 import com.google.cloud.spanner.AbortedDueToConcurrentModificationException;
 import com.google.cloud.spanner.Mutation;
@@ -58,6 +59,10 @@ public void test01_RunScript() throws Exception {
 
   @Test
   public void test02_RunAbortedTest() {
+    assumeFalse(
+        "concurrent transactions are not supported on the emulator",
+        env.getTestHelper().isEmulator());
+
     final long SINGER_ID = 2L;
     final long VENUE_ID = 68L;
     final long NUMBER_OF_SINGERS = 30L;

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/it/ITSqlScriptTest.java

@@ -16,7 +16,9 @@
 
 package com.google.cloud.spanner.connection.it;
 
+import com.google.cloud.spanner.ErrorCode;
 import com.google.cloud.spanner.ParallelIntegrationTest;
+import com.google.cloud.spanner.SpannerException;
 import com.google.cloud.spanner.connection.ITAbstractSpannerTest;
 import com.google.cloud.spanner.connection.SqlScriptVerifier;
 import com.google.cloud.spanner.connection.SqlScriptVerifier.SpannerGenericConnection;
@@ -73,6 +75,12 @@ public void test02_InsertTestData() throws Exception {
           SpannerGenericConnection.of(connection),
           INSERT_AND_VERIFY_TEST_DATA,
           SqlScriptVerifier.class);
+    } catch (SpannerException e) {
+      if (env.getTestHelper().isEmulator() && e.getErrorCode() == ErrorCode.ALREADY_EXISTS) {
+        // Errors in a transaction are 'sticky' on the emulator, so any query in the same
+        // transaction will return the same error as the error generated by a previous (update)
+        // statement.
+      }
     }
   }
 
@@ -93,6 +101,11 @@ public void test04_TestGetCommitTimestamp() throws Exception {
           SpannerGenericConnection.of(connection),
           TEST_GET_COMMIT_TIMESTAMP,
           SqlScriptVerifier.class);
+    } catch (SpannerException e) {
+      if (env.getTestHelper().isEmulator() && e.getErrorCode() == ErrorCode.INVALID_ARGUMENT) {
+        // Errors in a transaction are 'sticky' on the emulator, so any query in the same
+        // transaction will return the same error as the error generated by a previous statement.
+      }
     }
   }
 

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/it/ITTransactionModeTest.java

@@ -42,7 +42,7 @@
 public class ITTransactionModeTest extends ITAbstractSpannerTest {
   @Override
   public void appendConnectionUri(StringBuilder uri) {
-    uri.append("?autocommit=false");
+    uri.append(";autocommit=false");
   }
 
   @Override