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A Java implementation of sbt's test interface for JUnit 4

There is a newer version: 1.0.0

package munit.internal.junitinterface;

public class Ansi {
  // Standard ANSI sequences
  private static final String NORMAL = "\u001B[0m";
  private static final String HIGH_INTENSITY = "\u001B[1m";
  private static final String LOW_INTESITY = "\u001B[2m";
  private static final String BLACK = "\u001B[30m";
  private static final String RED = "\u001B[31m";
  private static final String GREEN = "\u001B[32m";
  private static final String YELLOW = "\u001B[33m";
  private static final String BLUE = "\u001B[34m";
  private static final String MAGENTA = "\u001B[35m";
  private static final String CYAN = "\u001B[36m";
  private static final String WHITE = "\u001B[37m";

  private static final String DARK_GREY = "\u001B[90m";
  private static final String LIGHT_RED = "\u001B[91m";
  private static final String LIGHT_GREEN = "\u001B[92m";
  private static final String LIGHT_YELLOW = "\u001B[93m";
  private static final String LIGHT_BLUE = "\u001B[94m";
  private static final String LIGHT_MAGENTA = "\u001B[95m";
  private static final String LIGHT_CYAN = "\u001B[96m";

  public static String c(String s, String colorSequence)
  {
    if(colorSequence == null) return s;
    else return colorSequence + s + NORMAL;
  }

  public static String filterAnsi(String s)
  {
    if(s == null) return null;
    StringBuilder b = new StringBuilder(s.length());
    int len = s.length();
    for(int i=0; i