metron-analytics/metron-statistics/src/test/java/org/apache/metron/statistics/BinFunctionsTest.java

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 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.metron.statistics;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.apache.metron.stellar.common.StellarProcessor;
import org.apache.metron.stellar.dsl.Context;
import org.apache.metron.stellar.dsl.DefaultVariableResolver;
import org.apache.metron.stellar.dsl.StellarFunctions;
import org.junit.jupiter.api.Test;

import java.util.Map;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

public class BinFunctionsTest {
  public static Object run(String rule, Map<String, Object> variables) {
    Context context = Context.EMPTY_CONTEXT();
    StellarProcessor processor = new StellarProcessor();
    assertTrue(processor.validate(rule, context), rule + " not valid.");
    return processor.parse(rule, new DefaultVariableResolver(x -> variables.get(x),x -> variables.containsKey(x)), StellarFunctions.FUNCTION_RESOLVER(), context);
  }

  @Test
  public void testBin() {
    assertEquals(run("BIN(value, bounds)", ImmutableMap.of("value", 0, "bounds", ImmutableList.of(10, 20, 30))), 0);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 0)), 0);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 9)), 0);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 10)), 0);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 11)), 1);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 19)), 1);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 21)), 2);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 29)), 2);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 31)), 3);
    assertEquals(run("BIN(value, [ 10, 20, 30 ])", ImmutableMap.of("value", 1000)), 3);
  }
}