DiffMatchPatch\DiffTest::testLevenshtein PHP Method

    public function testLevenshtein()
    {
        // Levenshtein with trailing equality.
        $this->d->setChanges(array(array(Diff::DELETE, "abc"), array(Diff::INSERT, "1234"), array(Diff::EQUAL, "xyz")));
        $this->assertEquals(4, $this->d->levenshtein());
        // Levenshtein with leading equality.
        $this->d->setChanges(array(array(Diff::EQUAL, "xyz"), array(Diff::DELETE, "abc"), array(Diff::INSERT, "1234")));
        $this->assertEquals(4, $this->d->levenshtein());
        // Levenshtein with middle equality.
        $this->d->setChanges(array(array(Diff::DELETE, "abc"), array(Diff::EQUAL, "xyz"), array(Diff::INSERT, "1234")));
        $this->assertEquals(7, $this->d->levenshtein());
    }