### Question:
FluentListAssert extends AbstractFluentAssert<FluentListAssert, FluentList> implements ListStateAssert, ListAttributeAssert { @Override public FluentListAssert hasTagName(String tagName) { List<String> actualTags = requiresNonEmpty(actual.tagNames()); if (!actualTags.contains(tagName)) { failWithMessage("No selected elements have tag: " + tagName + ". Actual tags found : " + actualTags); } return this; } FluentListAssert(FluentList<? extends FluentWebElement> actual); @Override FluentListAssert isEmpty(); @Override FluentListAssert isNotEmpty(); @Override FluentListAssert hasSize(int expectedSize); @Override FluentListSizeBuilder hasSize(); @Override FluentListAssert hasText(String textToFind); @Override FluentListAssert hasTextContaining(String textToFind); @Override FluentListAssert hasTextMatching(String regexToBeMatched); @Override FluentListAssert hasNotText(String textToFind); @Override FluentListAssert hasNotTextContaining(String textToFind); @Override FluentListAssert hasId(String idToFind); @Override FluentListAssert hasClass(String classToFind); @Override FluentListAssert hasClasses(String... classesToFind); @Override FluentListAssert hasNotClass(String htmlClass); @Override FluentListAssert hasNotClasses(String... htmlClasses); @Override FluentListAssert hasValue(String value); @Override FluentListAssert hasName(String name); @Override FluentListAssert hasTagName(String tagName); @Override FluentListAssert hasDimension(Dimension dimension); @Override FluentListAssert hasAttributeValue(String attribute, String value); @Override ListAssert<String> hasAttribute(String attribute); @Override FluentListAssert hasNotAttribute(String attribute);  }### Answer:
@Test public void testHasTagNameOk() { when(fluentList.tagNames()).thenReturn(Lists.newArrayList("span", "div")); listAssert.hasTagName("span"); }
@Test public void testHasTagNamedKo() { when(fluentList.tagNames()).thenReturn(Lists.newArrayList("span", "div")); assertThatAssertionErrorIsThrownBy(() -> listAssert.hasTagName("p")) .hasMessage("No selected elements have tag: p. Actual tags found : [span, div]"); }