fix: fix JSON sample test (#1417)

Author: zoercai

samples/snippets/src/main/java/com/example/spanner/QueryWithJsonParameterSample.java

@@ -42,7 +42,7 @@ static void queryWithJsonParameter() {
   }
 
   static void queryWithJsonParameter(DatabaseClient client) {
-    String exampleJson = "{rating: 9}";
+    String exampleJson = "{\"rating\": 9}";
     Statement statement =
         Statement.newBuilder(
                 "SELECT VenueId, VenueDetails\n"
@@ -56,7 +56,7 @@ static void queryWithJsonParameter(DatabaseClient client) {
       while (resultSet.next()) {
         System.out.printf(
             "VenueId: %s, VenueDetails: %s%n",
-            resultSet.getLong("VenueId"), resultSet.getString("VenueDetails"));
+            resultSet.getLong("VenueId"), resultSet.getJson("VenueDetails"));
       }
     }
   }

samples/snippets/src/test/java/com/example/spanner/SpannerStandaloneExamplesIT.java

@@ -238,7 +238,7 @@ public void updateJsonData_shouldWriteData() {
             () ->
                 UpdateJsonDataSample.updateJsonData(
                     spanner.getDatabaseClient(DatabaseId.of(projectId, instanceId, databaseId))));
-    assertThat(out).contains("VenueDetails successfully updated");
+    assertThat(out).contains("Venues successfully updated");
   }
 
   @Test
@@ -274,6 +274,6 @@ public void queryWithJsonParameter_shouldReturnResults() {
                             + "\"tags\":[\"large\",\"airy\"]}"))
                 .build()));
     String out = runExample(() -> QueryWithJsonParameterSample.queryWithJsonParameter(client));
-    assertThat(out).contains("4 35000");
+    assertThat(out).contains("VenueId: 19, VenueDetails: {\"open\":true,\"rating\":9}");
   }
 }