### Question:
TokenIssuerStore { static boolean containsRegex(String s) { return s != null && (s.contains("*") || s.contains("+") || s.contains("\\") || s.contains("[") || s.contains("]") || s.contains("{") || s.contains("}")); } private  TokenIssuerStore(ApimAdapterConfig config, RestConfig restConfig, OfflineConfigurationCacheRepo offlineConfigurationCacheRepo); static TokenIssuerStore getInstance(); static TokenIssuerStore init(ApimAdapterConfig config, RestConfig restConfig, OfflineConfigurationCacheRepo offlineConfigurationCacheRepo); static void reset(); Optional<TokenIssuer> resolve(String issuerUrl); Collection<TokenIssuer> getIssuers();  }### Answer:
@Test public void containsRegex() { assertTrue(TokenIssuerStore.containsRegex(".*")); assertTrue(TokenIssuerStore.containsRegex(".+")); assertTrue(TokenIssuerStore.containsRegex("[a-Z]")); assertTrue(TokenIssuerStore.containsRegex("a[a-Z]*b")); assertTrue(TokenIssuerStore.containsRegex("a{1,}")); assertTrue(TokenIssuerStore.containsRegex("\\w")); assertFalse(TokenIssuerStore.containsRegex(null)); assertFalse(TokenIssuerStore.containsRegex("")); assertFalse(TokenIssuerStore.containsRegex("abc")); assertFalse(TokenIssuerStore.containsRegex("abc(def)ghe")); }