src/main/java/org/fest/assertions/internal/Strings.java
public void assertHasSize(@Nullable Description description, @Nullable String actual, int expectedSize) {
    assertNotNull(description, actual);
    int actualSize = actual.length();
    if (actualSize != expectedSize) {
      throw failures.failure(description, shouldHaveSize(actual, actualSize, expectedSize));
    }
  }
public void assertHasSize(@Nullable Description description, @Nullable String actual, int expectedSize) {
    assertNotNull(description, actual);
    int actualSize = actual.length();
    if (actualSize != expectedSize) {
      throw failures.failure(description, shouldHaveSize(actual, actualSize, expectedSize));
    }
  }
Asserts that the size of the <em>actual</em> {@code String} is equal to the expected one.

@param description the description of the <em>actual</em> {@code String}.
@param actual the <em>actual</em> {@code String}.
@param expectedSize the expected size of {@code actual}.
@throws AssertionError if the <em>actual</em> {@code String} is {@code null}.
@throws AssertionError if the size of the <em>actual</em> {@code String} is different than the expected one.