content: package com.airbnb.aerosolve.core.transforms;
  
  import com.airbnb.aerosolve.core.FeatureVector;
  import com.typesafe.config.Config;
  import com.typesafe.config.ConfigFactory;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.*;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  /**
   * @author Hector Yee
   */
  public class CapFloatTransformTest {
    private static final Logger log = LoggerFactory.getLogger(CapFloatTransformTest.class);
    
    public String makeConfig() {
      return "test_cap {\n" +
             " transform : cap_float\n" +
             " field1 : loc\n" +
             " lower_bound : 1.0\n" +
             " upper_bound : 39.0\n" +
             " keys : [lat,long,z,aaa]\n" +
             "}";
    }
  
    public String makeConfigWithOutput() {
      return "test_cap {\n" +
          " transform : cap_float\n" +
          " field1 : loc\n" +
          " lower_bound : 1.0\n" +
          " upper_bound : 39.0\n" +
          " keys : [lat,long,z,aaa]\n" +
          " output : new_output \n" +
          "}";
    }
    
    @Test
    public void testEmptyFeatureVector() {
      Config config = ConfigFactory.parseString(makeConfig());
      Transform transform = TransformFactory.createTransform(config, "test_cap");
      FeatureVector featureVector = new FeatureVector();
      transform.doTransform(featureVector);
      assertTrue(featureVector.getStringFeatures() == null);
    }
  
    @Test
    public void testTransform() {
      Config config = ConfigFactory.parseString(makeConfig());
      Transform transform = TransformFactory.createTransform(config, "test_cap");
      FeatureVector featureVector = TransformTestingHelper.makeFeatureVector();
      transform.doTransform(featureVector);
      Map<String, Set<String>> stringFeatures = featureVector.getStringFeatures();
      assertTrue(stringFeatures.size() == 1);
  
      Map<String, Double> feat1 = featureVector.getFloatFeatures().get("loc");
  
      assertEquals(3, feat1.size());
      assertEquals(37.7, feat1.get("lat"), 0.1);
      assertEquals(39.0, feat1.get("long"), 0.1);
      assertEquals(1.0, feat1.get("z"), 0.1);
    }
  
    @Test
    public void testTransformWithNewOutput() {
      Config config = ConfigFactory.parseString(makeConfigWithOutput());
      Transform transform = TransformFactory.createTransform(config, "test_cap");
      FeatureVector featureVector = TransformTestingHelper.makeFeatureVector();
      transform.doTransform(featureVector);
      Map<String, Set<String>> stringFeatures = featureVector.getStringFeatures();
      assertTrue(stringFeatures.size() == 1);
      // original feature should not change
      Map<String, Double> feat1 = featureVector.getFloatFeatures().get("loc");
      assertEquals(3, feat1.size());
      assertEquals(37.7, feat1.get("lat"), 0.1);
      assertEquals(40.0, feat1.get("long"), 0.1);
      assertEquals(-20, feat1.get("z"), 0.1);
  
      // capped features are in a new feature family
      assertTrue(featureVector.getFloatFeatures().containsKey("new_output"));
      Map<String, Double> feat2 = featureVector.getFloatFeatures().get("new_output");
      assertEquals(3, feat2.size());
      assertEquals(37.7, feat2.get("lat"), 0.1);
      assertEquals(39.0, feat2.get("long"), 0.1);
      assertEquals(1.0, feat2.get("z"), 0.1);
    }
  }