Add test cases on ProjectionsToken

features/sharding/core/src/main/java/org/apache/shardingsphere/sharding/rewrite/token/pojo/ProjectionsToken.java

@@ -37,6 +37,11 @@ public ProjectionsToken(final int startIndex, final Map<RouteUnit, Collection<St
         this.projections = projections;
     }
 
+    @Override
+    public int getStopIndex() {
+        return getStartIndex();
+    }
+
     @Override
     public String toString(final RouteUnit routeUnit) {
         StringBuilder result = new StringBuilder();
@@ -46,9 +51,4 @@ public String toString(final RouteUnit routeUnit) {
         }
         return result.toString();
     }
-
-    @Override
-    public int getStopIndex() {
-        return getStartIndex();
-    }
 }

features/sharding/core/src/test/java/org/apache/shardingsphere/sharding/rewrite/token/pojo/ProjectionsTokenTest.java

@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+package org.apache.shardingsphere.sharding.rewrite.token.pojo;
+
+import org.apache.shardingsphere.infra.route.context.RouteMapper;
+import org.apache.shardingsphere.infra.route.context.RouteUnit;
+import org.junit.jupiter.api.Test;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+class ProjectionsTokenTest {
+
+     @Test
+     void assertGetStopIndex() {
+         assertThat(new ProjectionsToken(10, Collections.emptyMap()).getStopIndex(), is(10));
+     }
+
+     @Test
+     void assertToStringWithoutRouteUnit() {
+         Map<RouteUnit, Collection<String>> projections = new HashMap<>(1, 1);
+         RouteUnit routeUnit = new RouteUnit(new RouteMapper("foo_ds", "foo_ds_0"), Collections.singleton(new RouteMapper("foo_tbl", "foo_tbl_1")));
+         assertThat(new ProjectionsToken(0, Collections.singletonMap(routeUnit, Collections.singleton("foo_col"))).toString(routeUnit), is(", foo_col"));
+     }
+}