Fix emulator tests

Author: sakthivelmanii

google-cloud-spanner/src/test/java/com/google/cloud/spanner/it/ITDatabaseTest.java

@@ -150,7 +150,9 @@ public void databaseDeletedTest() throws Exception {
         }
       }
     }
-    assertThat(notFoundException).isNotNull();
+    if(!isUsingEmulator()) {
+      assertThat(notFoundException).isNotNull();
+    }
 
     // Now get a new DatabaseClient for the database. This should now result in a valid
     // DatabaseClient.

google-cloud-spanner/src/test/java/com/google/cloud/spanner/it/ITJsonWriteReadTest.java

@@ -16,6 +16,7 @@
 
 package com.google.cloud.spanner.it;
 
+import static com.google.cloud.spanner.testing.EmulatorSpannerHelper.isUsingEmulator;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThrows;
 
@@ -29,6 +30,7 @@
 import com.google.cloud.spanner.SpannerException;
 import com.google.cloud.spanner.Statement;
 import com.google.cloud.spanner.Value;
+import com.google.cloud.spanner.testing.EmulatorSpannerHelper;
 import com.google.cloud.spanner.testing.RemoteSpannerHelper;
 import com.google.common.io.Resources;
 import java.io.File;
@@ -135,7 +137,7 @@ public void testWriteAndReadInvalidJsonValues() throws IOException {
       if (env.getTestHelper()
           .getOptions()
           .getSessionPoolOptions()
-          .getUseMultiplexedSessionForRW()) {
+          .getUseMultiplexedSessionForRW() && !isUsingEmulator()) {
         assertEquals(ErrorCode.INVALID_ARGUMENT, exception.getErrorCode());
       } else {
         assertEquals(ErrorCode.FAILED_PRECONDITION, exception.getErrorCode());

google-cloud-spanner/src/test/java/com/google/cloud/spanner/it/ITWriteTest.java

@@ -1084,7 +1084,7 @@ public void incorrectType() {
       if (env.getTestHelper()
           .getOptions()
           .getSessionPoolOptions()
-          .getUseMultiplexedSessionForRW()) {
+          .getUseMultiplexedSessionForRW() && !isUsingEmulator()) {
         assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.INVALID_ARGUMENT);
       } else {
         assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.FAILED_PRECONDITION);