src/main/java/org/fest/assertions/internal/Lists.java
public void assertHasSize(Description description, List<?> actual, int expectedSize) {
    assertNotNull(description, actual);
    int sizeOfActual = actual.size();
    if (sizeOfActual != expectedSize) {
      throw failures.failure(description, shouldHaveSize(actual, sizeOfActual, expectedSize));
    }
  }
public void assertHasSize(Description description, List<?> actual, int expectedSize) {
    assertNotNull(description, actual);
    int sizeOfActual = actual.size();
    if (sizeOfActual != expectedSize) {
      throw failures.failure(description, shouldHaveSize(actual, sizeOfActual, expectedSize));
    }
  }
Asserts that the number of elements in the given {@code List} is equal to the expected one.

@param description  contains information about the assertion.
@param actual       the given {@code List}.
@param expectedSize the expected size of {@code actual}.
@throws AssertionError if the given {@code Collection} is {@code null}.
@throws AssertionError if the number of elements in the given {@code List} is different than the expected one.