fix sample assertions

Author: kevkim-codes

samples/snippets/src/main/java/com/example/datastore/filters/MultiIneqFilter.java

@@ -29,6 +29,8 @@
 import com.google.cloud.datastore.QueryResults;
 import com.google.cloud.datastore.StructuredQuery.CompositeFilter;
 import com.google.cloud.datastore.StructuredQuery.PropertyFilter;
+import java.util.ArrayList;
+import java.util.List;
 
 public class MultiIneqFilter {
   public static void invoke() throws Exception {
@@ -51,9 +53,11 @@ public static void invoke() throws Exception {
       throw new Exception("query yielded no results");
     }
 
+    List<Entity> entities = new ArrayList<>();
     while (results.hasNext()) {
-      Entity entity = results.next();
-      System.out.printf("Entity: %s%n", entity);
+      entities.add(results.next());
     }
+
+    return entities;
   }
 }

samples/snippets/src/test/java/com/example/datastore/filters/MultiIneqFilterSampleIT.java

@@ -30,7 +30,8 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
-
+import java.util.ArrayList;
+import java.util.List;
 
 @RunWith(JUnit4.class)
 @SuppressWarnings("checkstyle:abbreviationaswordinname")
@@ -86,10 +87,9 @@ public void tearDown() {
 
   @Test
   public void testMultiIneqFilter() throws Exception {
-    // Act
-    MultiIneqFilter.invoke();
+    List<Entity> results = MultiIneqFilter.invoke();
 
-    // Assert
-    systemsOutRule.assertContains("Entity");
+    assertEquals(3, results.size());
+    assertEquals("Learn Cloud Datastore", results.get(0).getString("description"));
   }
 }