public async Task CopyTags()
{
var tag = _fixture.Create <Tag>();
var newName = tag.TagName;
var mergeInfo = new TagCopyInfo {
NewTagName = newName, SourceTagId = 1
};
_photosService.Setup(m => m.CopyTags(mergeInfo.NewTagName, mergeInfo.SourceTagId))
.ReturnsAsync(tag);
var response = await _tagsController.CopyTag(mergeInfo);
_photosService.Verify(m => m.CopyTags(mergeInfo.NewTagName, mergeInfo.SourceTagId),
Times.Once);
Assert.IsType <OkObjectResult>(response);
var value = ((OkObjectResult)response).Value;
Assert.IsType <Dto.Tag>(value);
var dto = value as Dto.Tag;
Assert.Equal(tag.TagName, dto.TagName);
Assert.Equal(tag.TagId, dto.TagId);
}