streampipes-connect-shared/src/test/java/org/apache/streampipes/connect/shared/preprocessing/convert/ToOriginalSchemaConverterTest.java

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 * 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
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package org.apache.streampipes.connect.shared.preprocessing.convert;

import org.apache.streampipes.model.connect.rules.TransformationRuleDescription;
import org.apache.streampipes.model.schema.EventProperty;
import org.apache.streampipes.model.schema.EventPropertyNested;
import org.apache.streampipes.model.schema.EventSchema;
import org.apache.streampipes.sdk.helpers.EpProperties;
import org.apache.streampipes.sdk.helpers.Labels;

import org.junit.jupiter.api.Test;

import java.util.ArrayList;
import java.util.List;

import static org.apache.streampipes.connect.shared.preprocessing.convert.Helpers.getUnit;
import static org.apache.streampipes.connect.shared.preprocessing.convert.Helpers.makeDeleteTransformationRule;
import static org.apache.streampipes.connect.shared.preprocessing.convert.Helpers.makeMoveTransformationRule;
import static org.apache.streampipes.connect.shared.preprocessing.convert.Helpers.makeNestedProperties;
import static org.apache.streampipes.connect.shared.preprocessing.convert.Helpers.makeSimpleProperties;
import static org.apache.streampipes.connect.shared.preprocessing.convert.Helpers.makeUnitTransformationRule;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class ToOriginalSchemaConverterTest {

  private static final String NESTED_DELIMITER = "<-=>";

  @Test
  public void testSimpleUnitConversion() {
    List<EventProperty> properties = makeSimpleProperties(true);

    var rules = new ArrayList<TransformationRuleDescription>();

    rules.add(makeUnitTransformationRule("stringProp"));

    var resultProperties = executeAndReturnResult(properties, rules);

    assertEquals(3, resultProperties.size());
    assertEquals("originalUnit", getUnit(resultProperties.get(0)));
  }

  @Test
  public void testNestedUnitConversion() {
    List<EventProperty> properties = makeNestedProperties();

    var rules = new ArrayList<TransformationRuleDescription>();

    rules.add(makeUnitTransformationRule("nested" + NESTED_DELIMITER + "stringProp"));

    var resultProperties = executeAndReturnResult(properties, rules);
    var nestedResultProperty = ((EventPropertyNested) resultProperties.get(1)).getEventProperties()
                                                                              .get(0);

    assertEquals(2, resultProperties.size());
    assertEquals("originalUnit", getUnit(nestedResultProperty));
  }

  @Test
  public void testSimpleMoveConversion() {
    List<EventProperty> properties = makeNestedProperties();
    var nestedProperty = ((EventPropertyNested) properties.get(1));
    nestedProperty.getEventProperties()
                  .add(EpProperties.stringEp(Labels.empty(), "epToBeMoved", ""));

    var rules = new ArrayList<TransformationRuleDescription>();

    rules.add(makeMoveTransformationRule("epToBeMoved", "nested"));

    var result = executeAndReturnResult(properties, rules);
    assertEquals(3, result.size());
    assertEquals(
        "timestamp",
        result.get(0)
              .getRuntimeName()
    );
    assertEquals(
        2,
        ((EventPropertyNested) result.get(1)).getEventProperties()
                                             .size()
    );
  }

  @Test
  public void testDeleteRule() {
    List<EventProperty> properties = makeSimpleProperties(true);
    var rules = new ArrayList<TransformationRuleDescription>();

    rules.add(makeDeleteTransformationRule("epToBeRestored"));
    var result = executeAndReturnResult(properties, rules);
    assertEquals(4, result.size());
    assertEquals(
        "epToBeRestored",
        result.get(3)
              .getRuntimeName()
    );
  }

  private List<EventProperty> executeAndReturnResult(
      List<EventProperty> properties,
      List<TransformationRuleDescription> rules
  ) {
    var result = new SchemaConverter().toOriginalSchema(new EventSchema(properties), rules);
    return result.getEventProperties();
  }
}