code: /*
   * 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.skywalking.oap.meter.analyzer.dsl;
  
  import com.google.common.collect.ImmutableMap;
  import lombok.extern.slf4j.Slf4j;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.MethodSource;
  
  import java.util.Arrays;
  import java.util.Collection;
  
  import static com.google.common.collect.ImmutableMap.of;
  import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
  
  @Slf4j
  public class FilterTest {
      public static Collection<Object[]> data() {
          final SampleFamily sf =
              SampleFamilyBuilder.newBuilder(
                                     Sample.builder()
                                           .value(1600592418480.0)
                                           .labels(ImmutableMap.of("str", "val1"))
                                           .name("instance_cpu_percentage")
                                           .build(),
                                     Sample.builder()
                                           .value(1600592418480.0)
                                           .labels(ImmutableMap.of("str", "val2"))
                                           .name("instance_cpu_percentage")
                                           .build())
                                 .build();
          return Arrays.asList(new Object[][]{
              {
                  "filter-string",
                  of("instance_cpu_percentage", sf),
                  "instance_cpu_percentage.filter({ tags -> tags.str == 'val1' })",
                  Result.success(SampleFamily.build(sf.context, sf.samples[0]))
              },
              {
                  "filter-none",
                  of("instance_cpu_percentage", sf),
                  "instance_cpu_percentage.filter({ tags -> tags.str == 'val2' })",
                  Result.success(SampleFamily.build(sf.context, sf.samples[1]))
              },
              {
                  "filter-not-equal",
                  of("instance_cpu_percentage", sf),
                  "instance_cpu_percentage.filter({ tags -> tags.str != 'val1' })",
                  Result.success(SampleFamily.build(sf.context, sf.samples[1]))
              },
              {
                  "filter-in",
                  of("instance_cpu_percentage", sf),
                  "instance_cpu_percentage.filter({ tags -> tags.str in [ 'val2' ] })",
                  Result.success(SampleFamily.build(sf.context, sf.samples[1]))
              },
              {
                  "filter-in",
                  of("instance_cpu_percentage", sf),
                  "instance_cpu_percentage.filter({ tags -> tags.str in [ 'val1', 'val2' ] })",
                  Result.success(sf)
              },
          });
      }
  
      @ParameterizedTest(name = "{0}")
      @MethodSource("data")
      public void test(String name,
                       ImmutableMap<String, SampleFamily> input,
                       String expression,
                       Result want) {
          Expression e = DSL.parse(expression);
          Result r = e.run(input);
          assertThat(r).isEqualTo(want);
      }
  }
  