MapUtilsTest.java

package com.kickstarter.libs.utils;

import junit.framework.TestCase;

import java.util.HashMap;
import java.util.Map;

public class MapUtilsTest extends TestCase {

  public void testCompact_withoutNullValues() {
    final Map<Object, Object> map = new HashMap<Object, Object>() {
      {
        put("a", 1);
        put("b", 2);
        put("c", 3);
      }
    };

    assertEquals(MapUtils.compact(map), map);
  }

  public void testCompact_withNullValues() {
    final Map<Object, Object> map = new HashMap<Object, Object>() {
      {
        put("a", 1);
        put("b", null);
        put("c", 3);
      }
    };

    final Map<Object, Object> mapWithoutNull = new HashMap<Object, Object>() {
      {
        put("a", 1);
        put("c", 3);
      }
    };

    assertEquals(MapUtils.compact(map), mapWithoutNull);
  }

  public void testPrefixKeys() {
    final Map<String, Object> map = new HashMap<String, Object>() {
      {
        put("a", 1);
        put("b", 2);
        put("c", 3);
      }
    };

    final Map<String, Object> mapWithPrefix = new HashMap<String, Object>() {
      {
        put("test_a", 1);
        put("test_b", 2);
        put("test_c", 3);
      }
    };

    assertEquals(MapUtils.prefixKeys(map, "test_"), mapWithPrefix);
  }
}