content: /*
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * 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.
   */
  
  package com.alibaba.graphscope.common.ir;
  
  import com.alibaba.graphscope.common.ir.tools.GraphBuilder;
  import com.alibaba.graphscope.common.ir.tools.config.GraphOpt;
  import com.alibaba.graphscope.common.ir.tools.config.LabelConfig;
  import com.alibaba.graphscope.common.ir.tools.config.SourceConfig;
  
  import org.apache.calcite.rel.RelNode;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class SourceTest {
  
      // g.V().hasLabel("person")
      @Test
      public void single_label_test() {
          GraphBuilder builder = Utils.mockGraphBuilder();
          SourceConfig sourceConfig =
                  new SourceConfig(GraphOpt.Source.VERTEX, new LabelConfig(false).addLabel("person"));
          RelNode source = builder.source(sourceConfig).build();
          Assert.assertEquals(
                  "GraphLogicalSource(tableConfig=[{isAll=false, tables=[person]}], alias=[_],"
                          + " opt=[VERTEX])",
                  source.explain().trim());
      }
  
      // g.V().hasLabel("person", "software").as("a")
      @Test
      public void multiple_labels_test() {
          GraphBuilder builder = Utils.mockGraphBuilder();
          SourceConfig sourceConfig =
                  new SourceConfig(
                          GraphOpt.Source.VERTEX,
                          new LabelConfig(false).addLabel("person").addLabel("software"),
                          "a");
          RelNode source = builder.source(sourceConfig).build();
          Assert.assertEquals(
                  "GraphLogicalSource(tableConfig=[{isAll=false, tables=[person, software]}],"
                          + " alias=[a], opt=[VERTEX])",
                  source.explain().trim());
      }
  
      // g.V().hasLabel("person", "knows") -> person and knows have different opt type, throw errors
      @Test
      public void multiple_labels_opt_test() {
          try {
              GraphBuilder builder = Utils.mockGraphBuilder();
              SourceConfig sourceConfig =
                      new SourceConfig(
                              GraphOpt.Source.VERTEX,
                              new LabelConfig(false).addLabel("person").addLabel("knows"));
              builder.source(sourceConfig).build();
          } catch (IllegalArgumentException e) {
              // expected error
              return;
          }
          Assert.fail("person and knows have different opt types, should have thrown errors");
      }
  }
  