src/main/java/org/fest/assertions/internal/Strings.java
public void assertDoesNotMatch(@Nullable Description description, @Nullable String actual, @Nonnull Pattern pattern) {
    checkNotNull(pattern);
    if (actual != null && pattern.matcher(actual).matches()) {
      String format = "expecting:<%s> not to match regular expression:<%s>";
      throw failures.failure(description, new BasicErrorMessageFactory(format, actual, pattern.pattern()));
    }
  }
public void assertDoesNotMatch(@Nullable Description description, @Nullable String actual, @Nonnull Pattern pattern) {
    checkNotNull(pattern);
    if (actual != null && pattern.matcher(actual).matches()) {
      String format = "expecting:<%s> not to match regular expression:<%s>";
      throw failures.failure(description, new BasicErrorMessageFactory(format, actual, pattern.pattern()));
    }
  }
Verifies that the <em>actual</em> {@code String} does not match the given regular expression.

@param description the description of the <em>actual</em> {@code String}.
@param actual the <em>actual</em> {@code String}.
@param pattern the compiled representation of the regular expression pattern to which the <em>actual</em>
{@code String} is to be matched.
@throws NullPointerException if the given pattern is {@code null}.
@throws AssertionError if the <em>actual</em> {@code String} matches the given regular expression.