DiffMatchPatch\DiffTest::testXIndex PHP Method

    public function testXIndex()
    {
        // Translate a location in text1 to text2.
        $this->d->setChanges(array(array(Diff::DELETE, "a"), array(Diff::INSERT, "1234"), array(Diff::EQUAL, "xyz")));
        $this->assertEquals(5, $this->d->xIndex(2));
        // Translation on deletion.
        $this->d->setChanges(array(array(Diff::EQUAL, "a"), array(Diff::DELETE, "1234"), array(Diff::EQUAL, "xyz")));
        $this->assertEquals(1, $this->d->xIndex(3));
    }