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;
  import static org.junit.jupiter.api.Assertions.fail;
  
  @Slf4j
  public class ArithmeticTest {
      public static Collection<Object[]> data() {
          return Arrays.asList(new Object[][] {
              {
                  "plus-scalar-1",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480.0)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(1600592418481.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "1000 + http_success_request.tagEqual('idc','t1')",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592419480.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "plus-scalar",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480.0)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(1600592418481.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "http_success_request.tagEqual('idc','t1') + 1000",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592419480.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "minus-scalar",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480.0)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(1600592418481.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "http_success_request.tagEqual('idc','t1') - 1000",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592417480.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "multiply-scalar",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480.0)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(1600592418481.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "http_success_request.tagEqual('idc','t1') * 1000",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480000.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "divide-scalar",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480.0)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(1600592418481.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "http_success_request.tagEqual('idc','t1') / 10",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(160059241848.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "divide-zero",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(1600592418480.0)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(1600592418481.0)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "http_success_request.tagEqual('idc','t1') / 0",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(Double.POSITIVE_INFINITY)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "empty-plus-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamily.EMPTY
                  ),
                  "http_success_request + http_error_request",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "empty-plus-sampleFamily",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_success_request + http_error_request",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                  ).build()),
                  false,
                  },
              {
                  "sampleFamily-plus-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_error_request + http_success_request ",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                  ).build()),
                  false,
                  },
              {
                  "sampleFamily-plus-sampleFamily",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(100).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(30).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t3")).value(40).name("http_success_request").build(),
                      Sample.builder().labels(of("region", "us")).value(80).name("http_success_request").build()
                  ).build(), "http_error_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t5")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("tz", "en-US")).value(3).name("http_error_request").build()
                  ).build()),
                  "http_success_request + http_error_request",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(150).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(33).name("http_success_request").build()
                  ).build()),
                  false,
                  },
              {
                  "empty-minus-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamily.EMPTY
                  ),
                  "http_success_request - http_error_request",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "empty-minus-sampleFamily",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_success_request - http_error_request",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(-50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(-3).name("http_error_request").build()
                  ).build()),
                  false,
                  },
              {
                  "sampleFamily-minus-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_error_request - http_success_request ",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                  ).build()),
                  false,
                  },
              {
                  "sampleFamily-minus-sampleFamily",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(100).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(30).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t3")).value(40).name("http_success_request").build(),
                      Sample.builder().labels(of("region", "us")).value(80).name("http_success_request").build()
                  ).build(), "http_error_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t5")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("tz", "en-US")).value(3).name("http_error_request").build()
                  ).build()),
                  "http_success_request - http_error_request",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(27).name("http_success_request").build()
                  ).build()),
                  false,
                  },
              {
                  "sameSampleFamily-minus-sameSampleFamily",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1", "service", "service1"))
                            .value(100)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2", "service", "service1"))
                            .value(30)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t3", "service", "service1"))
                            .value(40)
                            .name("http_success_request")
                            .build(),
                      Sample.builder()
                            .labels(of("region", "us", "service", "service1"))
                            .value(80)
                            .name("http_success_request")
                            .build()
                  ).build()),
                  "http_success_request.sum(['service']) - http_success_request.sum(['service'])",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("service", "service1")).value(0).name("http_success_request").build()
                  ).build()),
                  false,
                  },
              {
                  "empty-multiple-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamily.EMPTY
                  ),
                  "http_success_request * http_error_request",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "empty-multiple-sampleFamily",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_success_request * http_error_request",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "sampleFamily-multiple-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_error_request * http_success_request ",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "sampleFamily-multiple-sampleFamily",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(100).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(30).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t3")).value(40).name("http_success_request").build(),
                      Sample.builder().labels(of("region", "us")).value(80).name("http_success_request").build()
                  ).build(), "http_error_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t5")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("tz", "en-US")).value(3).name("http_error_request").build()
                  ).build()),
                  "http_success_request * http_error_request",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(5000).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(90).name("http_success_request").build()
                  ).build()),
                  false,
                  },
              {
                  "empty-divide-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamily.EMPTY
                  ),
                  "http_success_request / http_error_request",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "empty-divide-sampleFamily",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_success_request / http_error_request",
                  Result.fail("Parsed result is an EMPTY sample family"),
                  false,
                  },
              {
                  "sampleFamily-divide-empty",
                  of("http_success_request", SampleFamily.EMPTY,
                     "http_error_request", SampleFamilyBuilder.newBuilder(
                          Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                          Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build()
                      ).build()
                  ),
                  "http_error_request / http_success_request ",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder()
                            .labels(of("idc", "t1"))
                            .value(Double.POSITIVE_INFINITY)
                            .name("http_error_request")
                            .build(),
                      Sample.builder()
                            .labels(of("idc", "t2"))
                            .value(Double.POSITIVE_INFINITY)
                            .name("http_error_request")
                            .build()
                  ).build()),
                  false,
                  },
              {
                  "sampleFamily-divide-sampleFamily",
                  of("http_success_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(100).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(30).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t3")).value(40).name("http_success_request").build(),
                      Sample.builder().labels(of("region", "us")).value(80).name("http_success_request").build()
                  ).build(), "http_error_request", SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(50).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("idc", "t5")).value(3).name("http_error_request").build(),
                      Sample.builder().labels(of("tz", "en-US")).value(3).name("http_error_request").build()
                  ).build()),
                  "http_success_request / http_error_request",
                  Result.success(SampleFamilyBuilder.newBuilder(
                      Sample.builder().labels(of("idc", "t1")).value(2).name("http_success_request").build(),
                      Sample.builder().labels(of("idc", "t2")).value(10).name("http_success_request").build()
                  ).build()),
                  false,
                  },
              });
      }
  
      @ParameterizedTest(name = "{0}")
      @MethodSource("data")
      public void test(String name,
                       ImmutableMap<String, SampleFamily> input,
                       String expression,
                       Result want,
                       boolean isThrow) {
          Expression e = DSL.parse(expression);
          Result r = null;
          try {
              r = e.run(input);
          } catch (Throwable t) {
              if (isThrow) {
                  return;
              }
              log.error("Test failed", t);
              fail("Should not throw anything");
          }
          if (isThrow) {
              fail("Should throw something");
          }
          assertThat(r).isEqualTo(want);
      }
  }
  