public function testContains()
{
$r1 = new Reference();
$r1->addBookChapterAndVerseRange(1, 2, 6, 7);
$r2 = new Reference();
$r2->addBookChapterAndVerseRange(1, 2, 6, 7);
$r3 = new Reference();
$r3->addBookChapterAndVerseRange(1, 2, 4, 8);
$r4 = new Reference();
$r4->addBookChapterAndVerseRange(1, 2, 6, 9);
$this->assertTrue($r1->contains($r2));
$this->assertTrue($r3->contains($r1));
$this->assertFalse($r1->contains($r3));
$this->assertTrue($r4->contains($r1));
$this->assertFalse($r1->contains($r4));
$r5 = new Reference();
$r5->addBook(1);
$r6 = new Reference();
$r6->addBookAndChapter(1, 2);
$this->assertTrue($r5->contains($r1));
$this->assertTrue($r6->contains($r1));
}
