src/main/java/org/fest/assertions/internal/Strings.java
public void assertMatches(@Nullable Description description, @Nullable String actual, @Nonnull String regex) {
    checkNotNull(regex);
    assertMatches(description, actual, Pattern.compile(regex));
  }
public void assertMatches(@Nullable Description description, @Nullable String actual, @Nonnull String regex) {
    checkNotNull(regex);
    assertMatches(description, actual, Pattern.compile(regex));
  }
Verifies that the <em>actual</em> {@code String} matches the given regular expression.

@param description the description of the <em>actual</em> {@code String}.
@param actual the <em>actual</em> {@code String}.
@param regex the regular expression to which the <em>actual</em> {@code String} is to be matched.
@throws NullPointerException if the given regular expression is {@code null}.
@throws PatternSyntaxException if the regular expression's syntax is invalid.
@throws AssertionError if the <em>actual</em> {@code String} is {@code null}.
@throws AssertionError if the <em>actual</em> {@code String} does not match the given regular expression.