### Question:
GenericGermanyKnxProjectCharacteristics extends KnxProjectCharacteristics { float calculatePrefixMatchRatio(String candidateName, String primaryName) { int minLength = Math.min(candidateName.length(), primaryName.length()); int commonPrefixLength = 0; for (; commonPrefixLength < minLength; commonPrefixLength++) { if (candidateName.charAt(commonPrefixLength) != primaryName.charAt(commonPrefixLength)) { break; } } return (float) commonPrefixLength / (float) minLength; }  @Override GroupAddress findMatchingBrightnessGroupAddress(GroupAddress primarySwitchGroupAddress); @Override GroupAddress findMatchingBrightnessStatusGroupAddress(GroupAddress primarySwitchGroupAddress); @Override GroupAddress findMatchingDimGroupAddress(GroupAddress primarySwitchGroupAddress); @Override GroupAddress findMatchingStatusGroupAddress(GroupAddress primarySwitchGroupAddress); @Override boolean isLight(GroupAddress ga); @Override boolean isPrimarySwitch(GroupAddress ga); @Override void learn(List<GroupAddress> groupAddresses);  }### Answer:
@Test public void calculatePrefixMatchRatio() throws Exception { assertTrue( 0.6F <= characteristics.calculatePrefixMatchRatio("Licht Küche Status Ein/Aus", "Licht Küche Ein/Aus")); }