szurubooru/server/szurubooru/tests/func/test_posts.py

import os
from unittest.mock import patch
from datetime import datetime
import pytest
from szurubooru import db
from szurubooru.func import (
    posts, users, comments, tags, images, files, util, image_hash)


@pytest.mark.parametrize('input_mime_type,expected_url', [
    ('image/jpeg', 'http://example.com/posts/1.jpg'),
    ('image/gif', 'http://example.com/posts/1.gif'),
    ('totally/unknown', 'http://example.com/posts/1.dat'),
])
def test_get_post_url(input_mime_type, expected_url, config_injector):
    config_injector({'data_url': 'http://example.com/'})
    post = db.Post()
    post.post_id = 1
    post.mime_type = input_mime_type
    assert posts.get_post_content_url(post) == expected_url


@pytest.mark.parametrize('input_mime_type', ['image/jpeg', 'image/gif'])
def test_get_post_thumbnail_url(input_mime_type, config_injector):
    config_injector({'data_url': 'http://example.com/'})
    post = db.Post()
    post.post_id = 1
    post.mime_type = input_mime_type
    assert posts.get_post_thumbnail_url(post) \
        == 'http://example.com/generated-thumbnails/1.jpg'


@pytest.mark.parametrize('input_mime_type,expected_path', [
    ('image/jpeg', 'posts/1.jpg'),
    ('image/gif', 'posts/1.gif'),
    ('totally/unknown', 'posts/1.dat'),
])
def test_get_post_content_path(input_mime_type, expected_path):
    post = db.Post()
    post.post_id = 1
    post.mime_type = input_mime_type
    assert posts.get_post_content_path(post) == expected_path


@pytest.mark.parametrize('input_mime_type', ['image/jpeg', 'image/gif'])
def test_get_post_thumbnail_path(input_mime_type):
    post = db.Post()
    post.post_id = 1
    post.mime_type = input_mime_type
    assert posts.get_post_thumbnail_path(post) == 'generated-thumbnails/1.jpg'


@pytest.mark.parametrize('input_mime_type', ['image/jpeg', 'image/gif'])
def test_get_post_thumbnail_backup_path(input_mime_type):
    post = db.Post()
    post.post_id = 1
    post.mime_type = input_mime_type
    assert posts.get_post_thumbnail_backup_path(post) \
        == 'posts/custom-thumbnails/1.dat'


def test_serialize_note():
    note = db.PostNote()
    note.polygon = [[0, 1], [1, 1], [1, 0], [0, 0]]
    note.text = '...'
    assert posts.serialize_note(note) == {
        'polygon': [[0, 1], [1, 1], [1, 0], [0, 0]],
        'text': '...'
    }


def test_serialize_post_when_empty():
    assert posts.serialize_post(None, None) is None


def test_serialize_post(
        user_factory, comment_factory, tag_factory, config_injector):
    config_injector({'data_url': 'http://example.com/'})
    with patch('szurubooru.func.comments.serialize_comment'), \
            patch('szurubooru.func.users.serialize_micro_user'), \
            patch('szurubooru.func.posts.files.has'):
        files.has.return_value = True
        users.serialize_micro_user.side_effect \
            = lambda user, auth_user: user.name
        comments.serialize_comment.side_effect \
            = lambda comment, auth_user: comment.user.name

        auth_user = user_factory(name='auth user')
        post = db.Post()
        post.post_id = 1
        post.creation_time = datetime(1997, 1, 1)
        post.last_edit_time = datetime(1998, 1, 1)
        post.tags = [
            tag_factory(names=['tag1', 'tag2']),
            tag_factory(names=['tag3'])
        ]
        post.safety = db.Post.SAFETY_SAFE
        post.source = '4gag'
        post.type = db.Post.TYPE_IMAGE
        post.checksum = 'deadbeef'
        post.mime_type = 'image/jpeg'
        post.file_size = 100
        post.user = user_factory(name='post author')
        post.canvas_width = 200
        post.canvas_height = 300
        post.flags = ['loop']
        db.session.add(post)

        db.session.flush()
        db.session.add_all([
            comment_factory(
                user=user_factory(name='commenter1'),
                post=post,
                time=datetime(1999, 1, 1)),
            comment_factory(
                user=user_factory(name='commenter2'),
                post=post,
                time=datetime(1999, 1, 2)),
            db.PostFavorite(
                post=post,
                user=user_factory(name='fav1'),
                time=datetime(1800, 1, 1)),
            db.PostFeature(
                post=post,
                user=user_factory(),
                time=datetime(1999, 1, 1)),
            db.PostScore(
                post=post,
                user=auth_user,
                score=-1,
                time=datetime(1800, 1, 1)),
            db.PostScore(
                post=post,
                user=user_factory(),
                score=1,
                time=datetime(1800, 1, 1)),
            db.PostScore(
                post=post,
                user=user_factory(),
                score=1,
                time=datetime(1800, 1, 1))])
        db.session.flush()

        result = posts.serialize_post(post, auth_user)
        result['tags'].sort()

        assert result == {
            'id': 1,
            'version': 1,
            'creationTime': datetime(1997, 1, 1),
            'lastEditTime': datetime(1998, 1, 1),
            'safety': 'safe',
            'source': '4gag',
            'type': 'image',
            'checksum': 'deadbeef',
            'fileSize': 100,
            'canvasWidth': 200,
            'canvasHeight': 300,
            'contentUrl': 'http://example.com/posts/1.jpg',
            'thumbnailUrl': 'http://example.com/generated-thumbnails/1.jpg',
            'flags': ['loop'],
            'tags': ['tag1', 'tag3'],
            'relations': [],
            'notes': [],
            'user': 'post author',
            'score': 1,
            'ownFavorite': False,
            'ownScore': -1,
            'tagCount': 2,
            'favoriteCount': 1,
            'commentCount': 2,
            'noteCount': 0,
            'featureCount': 1,
            'relationCount': 0,
            'lastFeatureTime': datetime(1999, 1, 1),
            'favoritedBy': ['fav1'],
            'hasCustomThumbnail': True,
            'mimeType': 'image/jpeg',
            'comments': ['commenter1', 'commenter2'],
        }


def test_serialize_micro_post(post_factory, user_factory):
    with patch('szurubooru.func.posts.get_post_thumbnail_url'):
        posts.get_post_thumbnail_url.return_value \
            = 'https://example.com/thumb.png'
        auth_user = user_factory()
        post = post_factory()
        db.session.add(post)
        db.session.flush()
        assert posts.serialize_micro_post(post, auth_user) == {
            'id': post.post_id,
            'thumbnailUrl': 'https://example.com/thumb.png',
        }


def test_get_post_count(post_factory):
    previous_count = posts.get_post_count()
    db.session.add_all([post_factory(), post_factory()])
    db.session.flush()
    new_count = posts.get_post_count()
    assert previous_count == 0
    assert new_count == 2


def test_try_get_post_by_id(post_factory):
    post = post_factory()
    db.session.add(post)
    db.session.flush()
    assert posts.try_get_post_by_id(post.post_id) == post
    assert posts.try_get_post_by_id(post.post_id + 1) is None
    with pytest.raises(posts.InvalidPostIdError):
        posts.get_post_by_id('-')


def test_get_post_by_id(post_factory):
    post = post_factory()
    db.session.add(post)
    db.session.flush()
    assert posts.get_post_by_id(post.post_id) == post
    with pytest.raises(posts.PostNotFoundError):
        posts.get_post_by_id(post.post_id + 1)
    with pytest.raises(posts.InvalidPostIdError):
        posts.get_post_by_id('-')


def test_create_post(user_factory, fake_datetime):
    with patch('szurubooru.func.posts.update_post_content'), \
            patch('szurubooru.func.posts.update_post_tags'), \
            fake_datetime('1997-01-01'):
        auth_user = user_factory()
        post, _new_tags = posts.create_post('content', ['tag'], auth_user)
        assert post.creation_time == datetime(1997, 1, 1)
        assert post.last_edit_time is None
        posts.update_post_tags.assert_called_once_with(post, ['tag'])
        posts.update_post_content.assert_called_once_with(post, 'content')


@pytest.mark.parametrize('input_safety,expected_safety', [
    ('safe', db.Post.SAFETY_SAFE),
    ('sketchy', db.Post.SAFETY_SKETCHY),
    ('unsafe', db.Post.SAFETY_UNSAFE),
])
def test_update_post_safety(input_safety, expected_safety):
    post = db.Post()
    posts.update_post_safety(post, input_safety)
    assert post.safety == expected_safety


def test_update_post_safety_with_invalid_string():
    post = db.Post()
    with pytest.raises(posts.InvalidPostSafetyError):
        posts.update_post_safety(post, 'bad')


def test_update_post_source():
    post = db.Post()
    posts.update_post_source(post, 'x')
    assert post.source == 'x'


def test_update_post_source_with_too_long_string():
    post = db.Post()
    with pytest.raises(posts.InvalidPostSourceError):
        posts.update_post_source(post, 'x' * 1000)


@pytest.mark.parametrize(
    'is_existing,input_file,expected_mime_type,expected_type,output_file_name',
    [
        (True, 'png.png', 'image/png', db.Post.TYPE_IMAGE, '1.png'),
        (False, 'png.png', 'image/png', db.Post.TYPE_IMAGE, '1.png'),
        (False, 'jpeg.jpg', 'image/jpeg', db.Post.TYPE_IMAGE, '1.jpg'),
        (False, 'gif.gif', 'image/gif', db.Post.TYPE_IMAGE, '1.gif'),
        (
            False,
            'gif-animated.gif',
            'image/gif',
            db.Post.TYPE_ANIMATION,
            '1.gif',
        ),
        (False, 'webm.webm', 'video/webm', db.Post.TYPE_VIDEO, '1.webm'),
        (False, 'mp4.mp4', 'video/mp4', db.Post.TYPE_VIDEO, '1.mp4'),
        (
            False,
            'flash.swf',
            'application/x-shockwave-flash',
            db.Post.TYPE_FLASH,
            '1.swf'
        ),
    ])
def test_update_post_content_for_new_post(
        tmpdir, config_injector, post_factory, read_asset, is_existing,
        input_file, expected_mime_type, expected_type, output_file_name):
    with patch('szurubooru.func.util.get_sha1'):
        util.get_sha1.return_value = 'crc'
        config_injector({
            'data_dir': str(tmpdir.mkdir('data')),
            'thumbnails': {
                'post_width': 300,
                'post_height': 300,
            },
        })
        output_file_path = str(tmpdir) + '/data/posts/' + output_file_name
        post = post_factory()
        db.session.add(post)
        if is_existing:
            db.session.flush()
            assert post.post_id
        else:
            assert not post.post_id
        assert not os.path.exists(output_file_path)
        content = read_asset(input_file)
        posts.update_post_content(post, content)
        assert not os.path.exists(output_file_path)
        db.session.flush()
        assert post.mime_type == expected_mime_type
        assert post.type == expected_type
        assert post.checksum == 'crc'
        assert os.path.exists(output_file_path)
        if post.type in (db.Post.TYPE_IMAGE, db.Post.TYPE_ANIMATION):
            image_hash.delete_image.assert_called_once_with(post.post_id)
            image_hash.add_image.assert_called_once_with(post.post_id, content)
        else:
            image_hash.delete_image.assert_not_called()
            image_hash.add_image.assert_not_called()


def test_update_post_content_to_existing_content(
        tmpdir, config_injector, post_factory, read_asset):
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'data_url': 'example.com',
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    post = post_factory()
    another_post = post_factory()
    db.session.add_all([post, another_post])
    posts.update_post_content(post, read_asset('png.png'))
    db.session.flush()
    with pytest.raises(posts.PostAlreadyUploadedError):
        posts.update_post_content(another_post, read_asset('png.png'))


def test_update_post_content_with_broken_content(
        tmpdir, config_injector, post_factory, read_asset):
    # the rationale behind this behavior is to salvage user upload even if the
    # server software thinks it's broken. chances are the server is wrong,
    # especially about flash movies.
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    post = post_factory()
    another_post = post_factory()
    db.session.add_all([post, another_post])
    posts.update_post_content(post, read_asset('png-broken.png'))
    db.session.flush()
    assert post.canvas_width is None
    assert post.canvas_height is None


@pytest.mark.parametrize('input_content', [None, b'not a media file'])
def test_update_post_content_with_invalid_content(input_content):
    post = db.Post()
    with pytest.raises(posts.InvalidPostContentError):
        posts.update_post_content(post, input_content)


@pytest.mark.parametrize('is_existing', (True, False))
def test_update_post_thumbnail_to_new_one(
        tmpdir, config_injector, read_asset, post_factory, is_existing):
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    post = post_factory()
    db.session.add(post)
    if is_existing:
        db.session.flush()
        assert post.post_id
    else:
        assert not post.post_id
    generated_path = str(tmpdir) + '/data/generated-thumbnails/1.jpg'
    source_path = str(tmpdir) + '/data/posts/custom-thumbnails/1.dat'
    assert not os.path.exists(generated_path)
    assert not os.path.exists(source_path)
    posts.update_post_content(post, read_asset('png.png'))
    posts.update_post_thumbnail(post, read_asset('jpeg.jpg'))
    assert not os.path.exists(generated_path)
    assert not os.path.exists(source_path)
    db.session.flush()
    assert os.path.exists(generated_path)
    assert os.path.exists(source_path)
    with open(source_path, 'rb') as handle:
        assert handle.read() == read_asset('jpeg.jpg')


@pytest.mark.parametrize('is_existing', (True, False))
def test_update_post_thumbnail_to_default(
        tmpdir, config_injector, read_asset, post_factory, is_existing):
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    post = post_factory()
    db.session.add(post)
    if is_existing:
        db.session.flush()
        assert post.post_id
    else:
        assert not post.post_id
    generated_path = str(tmpdir) + '/data/generated-thumbnails/1.jpg'
    source_path = str(tmpdir) + '/data/posts/custom-thumbnails/1.dat'
    assert not os.path.exists(generated_path)
    assert not os.path.exists(source_path)
    posts.update_post_content(post, read_asset('png.png'))
    posts.update_post_thumbnail(post, read_asset('jpeg.jpg'))
    posts.update_post_thumbnail(post, None)
    assert not os.path.exists(generated_path)
    assert not os.path.exists(source_path)
    db.session.flush()
    assert os.path.exists(generated_path)
    assert not os.path.exists(source_path)


@pytest.mark.parametrize('is_existing', (True, False))
def test_update_post_thumbnail_with_broken_thumbnail(
        tmpdir, config_injector, read_asset, post_factory, is_existing):
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    post = post_factory()
    db.session.add(post)
    if is_existing:
        db.session.flush()
        assert post.post_id
    else:
        assert not post.post_id
    generated_path = str(tmpdir) + '/data/generated-thumbnails/1.jpg'
    source_path = str(tmpdir) + '/data/posts/custom-thumbnails/1.dat'
    assert not os.path.exists(generated_path)
    assert not os.path.exists(source_path)
    posts.update_post_content(post, read_asset('png.png'))
    posts.update_post_thumbnail(post, read_asset('png-broken.png'))
    assert not os.path.exists(generated_path)
    assert not os.path.exists(source_path)
    db.session.flush()
    assert os.path.exists(generated_path)
    assert os.path.exists(source_path)
    with open(source_path, 'rb') as handle:
        assert handle.read() == read_asset('png-broken.png')
    with open(generated_path, 'rb') as handle:
        image = images.Image(handle.read())
        assert image.width == 1
        assert image.height == 1


def test_update_post_content_leaving_custom_thumbnail(
        tmpdir, config_injector, read_asset, post_factory):
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    post = post_factory(id=1)
    db.session.add(post)
    posts.update_post_content(post, read_asset('png.png'))
    posts.update_post_thumbnail(post, read_asset('jpeg.jpg'))
    posts.update_post_content(post, read_asset('png.png'))
    db.session.flush()
    assert os.path.exists(str(tmpdir) + '/data/posts/custom-thumbnails/1.dat')
    assert os.path.exists(str(tmpdir) + '/data/generated-thumbnails/1.jpg')


def test_update_post_tags(tag_factory):
    post = db.Post()
    with patch('szurubooru.func.tags.get_or_create_tags_by_names'):
        tags.get_or_create_tags_by_names.side_effect = lambda tag_names: \
            ([tag_factory(names=[name]) for name in tag_names], [])
        posts.update_post_tags(post, ['tag1', 'tag2'])
    assert len(post.tags) == 2
    assert post.tags[0].names[0].name == 'tag1'
    assert post.tags[1].names[0].name == 'tag2'


def test_update_post_relations(post_factory):
    relation1 = post_factory()
    relation2 = post_factory()
    db.session.add_all([relation1, relation2])
    db.session.flush()
    post = post_factory()
    posts.update_post_relations(post, [relation1.post_id, relation2.post_id])
    assert len(post.relations) == 2
    assert sorted(r.post_id for r in post.relations) == [
        relation1.post_id, relation2.post_id]


def test_update_post_relations_bidirectionality(post_factory):
    relation1 = post_factory()
    relation2 = post_factory()
    db.session.add_all([relation1, relation2])
    db.session.flush()
    post = post_factory()
    posts.update_post_relations(post, [relation1.post_id, relation2.post_id])
    db.session.flush()
    posts.update_post_relations(relation1, [])
    assert len(post.relations) == 1
    assert post.relations[0].post_id == relation2.post_id


def test_update_post_relations_with_nonexisting_posts():
    post = db.Post()
    with pytest.raises(posts.InvalidPostRelationError):
        posts.update_post_relations(post, [100])


def test_update_post_relations_with_itself(post_factory):
    post = post_factory()
    db.session.add(post)
    db.session.flush()
    with pytest.raises(posts.InvalidPostRelationError):
        posts.update_post_relations(post, [post.post_id])


def test_update_post_notes():
    post = db.Post()
    posts.update_post_notes(
        post,
        [
            {'polygon': [[0, 0], [0, 1], [1, 0], [0, 0]], 'text': 'text1'},
            {'polygon': [[0, 0], [0, 1], [1, 0], [0, 0]], 'text': 'text2'},
        ])
    assert len(post.notes) == 2
    assert post.notes[0].polygon == [[0, 0], [0, 1], [1, 0], [0, 0]]
    assert post.notes[0].text == 'text1'
    assert post.notes[1].polygon == [[0, 0], [0, 1], [1, 0], [0, 0]]
    assert post.notes[1].text == 'text2'


@pytest.mark.parametrize('input', [
    [{'text': '...'}],
    [{'polygon': None, 'text': '...'}],
    [{'polygon': 'trash', 'text': '...'}],
    [{'polygon': ['trash', 'trash', 'trash'], 'text': '...'}],
    [{'polygon': {2: 'trash', 3: 'trash', 4: 'trash'}, 'text': '...'}],
    [{'polygon': [[0, 0]], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], None], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], 'surprise'], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], {2: 'trash', 3: 'trash'}], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], 5], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], [0, 2]], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], [0, '...']], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], [0, 0, 0]], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], [0]], 'text': '...'}],
    [{'polygon': [[0, 0], [0, 0], [0, 1]], 'text': ''}],
    [{'polygon': [[0, 0], [0, 0], [0, 1]], 'text': None}],
    [{'polygon': [[0, 0], [0, 0], [0, 1]]}],
])
def test_update_post_notes_with_invalid_content(input):
    post = db.Post()
    with pytest.raises(posts.InvalidPostNoteError):
        posts.update_post_notes(post, input)


def test_update_post_flags():
    post = db.Post()
    posts.update_post_flags(post, ['loop'])
    assert post.flags == ['loop']


def test_update_post_flags_with_invalid_content():
    post = db.Post()
    with pytest.raises(posts.InvalidPostFlagError):
        posts.update_post_flags(post, ['invalid'])


def test_feature_post(post_factory, user_factory):
    post = post_factory()
    user = user_factory()
    previous_featured_post = posts.try_get_featured_post()
    db.session.flush()
    posts.feature_post(post, user)
    db.session.flush()
    new_featured_post = posts.try_get_featured_post()
    assert previous_featured_post is None
    assert new_featured_post == post


def test_delete(post_factory):
    post = post_factory()
    db.session.add(post)
    db.session.flush()
    assert posts.get_post_count() == 1
    posts.delete(post)
    db.session.flush()
    assert posts.get_post_count() == 0


def test_merge_posts_deletes_source_post(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    db.session.add_all([source_post, target_post])
    db.session.flush()
    posts.merge_posts(source_post, target_post, False)
    db.session.flush()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    post = posts.get_post_by_id(target_post.post_id)
    assert post is not None


def test_merge_posts_with_itself(post_factory):
    source_post = post_factory()
    db.session.add(source_post)
    db.session.flush()
    with pytest.raises(posts.InvalidPostRelationError):
        posts.merge_posts(source_post, source_post, False)


def test_merge_posts_moves_tags(post_factory, tag_factory):
    source_post = post_factory()
    target_post = post_factory()
    tag = tag_factory()
    tag.posts = [source_post]
    db.session.add_all([source_post, target_post, tag])
    db.session.commit()
    assert source_post.tag_count == 1
    assert target_post.tag_count == 0
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).tag_count == 1


def test_merge_posts_doesnt_duplicate_tags(post_factory, tag_factory):
    source_post = post_factory()
    target_post = post_factory()
    tag = tag_factory()
    tag.posts = [source_post, target_post]
    db.session.add_all([source_post, target_post, tag])
    db.session.commit()
    assert source_post.tag_count == 1
    assert target_post.tag_count == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).tag_count == 1


def test_merge_posts_moves_comments(post_factory, comment_factory):
    source_post = post_factory()
    target_post = post_factory()
    comment = comment_factory(post=source_post)
    db.session.add_all([source_post, target_post, comment])
    db.session.commit()
    assert source_post.comment_count == 1
    assert target_post.comment_count == 0
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).comment_count == 1


def test_merge_posts_moves_scores(post_factory, post_score_factory):
    source_post = post_factory()
    target_post = post_factory()
    score = post_score_factory(post=source_post, score=1)
    db.session.add_all([source_post, target_post, score])
    db.session.commit()
    assert source_post.score == 1
    assert target_post.score == 0
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).score == 1


def test_merge_posts_doesnt_duplicate_scores(
        post_factory, user_factory, post_score_factory):
    source_post = post_factory()
    target_post = post_factory()
    user = user_factory()
    score1 = post_score_factory(post=source_post, score=1, user=user)
    score2 = post_score_factory(post=target_post, score=1, user=user)
    db.session.add_all([source_post, target_post, score1, score2])
    db.session.commit()
    assert source_post.score == 1
    assert target_post.score == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).score == 1


def test_merge_posts_moves_favorites(post_factory, post_favorite_factory):
    source_post = post_factory()
    target_post = post_factory()
    favorite = post_favorite_factory(post=source_post)
    db.session.add_all([source_post, target_post, favorite])
    db.session.commit()
    assert source_post.favorite_count == 1
    assert target_post.favorite_count == 0
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).favorite_count == 1


def test_merge_posts_doesnt_duplicate_favorites(
        post_factory, user_factory, post_favorite_factory):
    source_post = post_factory()
    target_post = post_factory()
    user = user_factory()
    favorite1 = post_favorite_factory(post=source_post, user=user)
    favorite2 = post_favorite_factory(post=target_post, user=user)
    db.session.add_all([source_post, target_post, favorite1, favorite2])
    db.session.commit()
    assert source_post.favorite_count == 1
    assert target_post.favorite_count == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).favorite_count == 1


def test_merge_posts_moves_child_relations(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    related_post = post_factory()
    source_post.relations = [related_post]
    db.session.add_all([source_post, target_post, related_post])
    db.session.commit()
    assert source_post.relation_count == 1
    assert target_post.relation_count == 0
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).relation_count == 1


def test_merge_posts_doesnt_duplicate_child_relations(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    related_post = post_factory()
    source_post.relations = [related_post]
    target_post.relations = [related_post]
    db.session.add_all([source_post, target_post, related_post])
    db.session.commit()
    assert source_post.relation_count == 1
    assert target_post.relation_count == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).relation_count == 1


def test_merge_posts_moves_parent_relations(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    related_post = post_factory()
    related_post.relations = [source_post]
    db.session.add_all([source_post, target_post, related_post])
    db.session.commit()
    assert source_post.relation_count == 1
    assert target_post.relation_count == 0
    assert related_post.relation_count == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).relation_count == 1
    assert posts.get_post_by_id(related_post.post_id).relation_count == 1


def test_merge_posts_doesnt_duplicate_parent_relations(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    related_post = post_factory()
    related_post.relations = [source_post, target_post]
    db.session.add_all([source_post, target_post, related_post])
    db.session.commit()
    assert source_post.relation_count == 1
    assert target_post.relation_count == 1
    assert related_post.relation_count == 2
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).relation_count == 1
    assert posts.get_post_by_id(related_post.post_id).relation_count == 1


def test_merge_posts_doesnt_create_relation_loop_for_children(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    source_post.relations = [target_post]
    db.session.add_all([source_post, target_post])
    db.session.commit()
    assert source_post.relation_count == 1
    assert target_post.relation_count == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).relation_count == 0


def test_merge_posts_doesnt_create_relation_loop_for_parents(post_factory):
    source_post = post_factory()
    target_post = post_factory()
    target_post.relations = [source_post]
    db.session.add_all([source_post, target_post])
    db.session.commit()
    assert source_post.relation_count == 1
    assert target_post.relation_count == 1
    posts.merge_posts(source_post, target_post, False)
    db.session.commit()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    assert posts.get_post_by_id(target_post.post_id).relation_count == 0


def test_merge_posts_replaces_content(
        post_factory, config_injector, tmpdir, read_asset):
    config_injector({
        'data_dir': str(tmpdir.mkdir('data')),
        'data_url': 'example.com',
        'thumbnails': {
            'post_width': 300,
            'post_height': 300,
        },
    })
    source_post = post_factory()
    target_post = post_factory()
    content = read_asset('png.png')
    db.session.add_all([source_post, target_post])
    db.session.commit()
    posts.update_post_content(source_post, content)
    db.session.flush()
    assert os.path.exists(os.path.join(str(tmpdir), 'data/posts/1.png'))
    assert not os.path.exists(os.path.join(str(tmpdir), 'data/posts/2.dat'))
    assert not os.path.exists(os.path.join(str(tmpdir), 'data/posts/2.png'))
    posts.merge_posts(source_post, target_post, True)
    db.session.flush()
    assert posts.try_get_post_by_id(source_post.post_id) is None
    post = posts.get_post_by_id(target_post.post_id)
    assert post is not None
    assert os.path.exists(os.path.join(str(tmpdir), 'data/posts/1.png'))
    assert os.path.exists(os.path.join(str(tmpdir), 'data/posts/2.png'))