### Question:
ClassPath { public String asArgumentString () { StringBuilder builder = new StringBuilder(); String delimiter = ""; for (File entry: _classPathEntries) { builder.append(delimiter).append(entry.getAbsolutePath()); delimiter = File.pathSeparator; } return builder.toString(); } ClassPath(LinkedHashSet<File> classPathEntries); String asArgumentString(); URL[] asUrls(); Set<File> getClassPathEntries();  }### Answer:
@Test public void shouldCreateValidArgumentString () { assertEquals( _firstJar.getAbsolutePath() + File.pathSeparator + _secondJar.getAbsolutePath(), _classPath.asArgumentString()); }