graze / data-file

        static::assertInstanceOf(NodeCollection::class, $this->collection);

    }

    public function testGetCommonPrefixReturnsCommonPrefixOfFiles()

    {

        $file1 = m::mock(FileNodeInterface::class);

        $file1->shouldReceive('getPath')->andReturn('some/common/path/to/file1.txt');

        $file2 = m::mock(FileNodeInterface::class);

        $file2->shouldReceive('getPath')->andReturn('some/common/path/to/file2.txt');

        $file3 = m::mock(FileNodeInterface::class);

        $file3->shouldReceive('getPath')->andReturn('some/common/path/to/file3.txt');

        $this->collection->add($file1);

        $this->collection->add($file2);

        $this->collection->add($file3);

        static::assertEquals('some/common/path/to/file', $this->collection->getCommonPrefix());

    }

    public function testGetCommonPrefixReturnsNullIfThereIsNoCommonPrefix()

    {

        static::assertEquals('some/common/path/to/file', $this->collection->getCommonPrefix());

    }

    public function testGetCommonPrefixReturnsNullIfThereIsNoCommonPrefix()

    {

        $file1 = m::mock(FileNodeInterface::class);

        $file1->shouldReceive('getPath')->andReturn('some/common/path/to/file1.txt');

        $file2 = m::mock(FileNodeInterface::class);

        $file2->shouldReceive('getPath')->andReturn('some/common/path/to/file2.txt');

        $file3 = m::mock(FileNodeInterface::class);

        $file3->shouldReceive('getPath')->andReturn('other/nonCommon/path/to/file3.txt');

        $this->collection->add($file1);

        $this->collection->add($file2);

        $this->collection->add($file3);

        static::assertNull($this->collection->getCommonPrefix());

    }

    public function testGetCommonPrefixReturnsNullIfThereAreNoItems()

    {