```ruby
require 'spec_helper'

describe RemoveFactFromChannel do
  describe ".perform" do
    before do
      @ch = create :channel
      @f = create :fact
      @ch.sorted_cached_facts << @f
      @f.channels << @ch
    end

    it "should remove the fact from the cached facts" do
      RemoveFactFromChannel.perform @f.id, @ch.id
      @ch.sorted_cached_facts.should_not include(@f)
      @f.channels.should_not include(@ch)
    end

    context "when the channel itself contains the fact" do
      it "should not remove the fact from the cached facts" do
        @ch.sorted_internal_facts << @f

        RemoveFactFromChannel.perform @f.id, @ch.id
        @ch.sorted_cached_facts.should include(@f)
        @f.channels.should include(@ch)
      end
    end

    context "when the channel already does not include the fact, but it was explicitely deleted" do
      before do
        @ch.sorted_cached_facts.delete @f
        @ch.sorted_delete_facts.add @f
      end
      it "should still remove the channel from the facts channellist" do
        Fact.should_receive(:[]).with(@f.id).and_return(@f)
        @f.channels.should_receive(:delete).with(@ch)
        RemoveFactFromChannel.perform @f.id, @ch.id
      end
      it "should not call resque on all its containing channels" do
        sup_ch = create :channel
        @ch.containing_channels << sup_ch

        Resque.should_not_receive(:enqueue)

        RemoveFactFromChannel.perform @f.id, @ch.id
      end
    end
  end
end
```

Remove no longer needed test
user
```ruby
require 'spec_helper'

describe RemoveFactFromChannel do
  describe ".perform" do
    before do
      @ch = create :channel
      @f = create :fact
      @ch.sorted_cached_facts << @f
      @f.channels << @ch
    end

    it "should remove the fact from the cached facts" do
      RemoveFactFromChannel.perform @f.id, @ch.id
      @ch.sorted_cached_facts.should_not include(@f)
      @f.channels.should_not include(@ch)
    end

    context "when the channel itself contains the fact" do
      it "should not remove the fact from the cached facts" do
        @ch.sorted_internal_facts << @f

        RemoveFactFromChannel.perform @f.id, @ch.id
        @ch.sorted_cached_facts.should include(@f)
        @f.channels.should include(@ch)
      end
    end

    context "when the channel already does not include the fact, but it was explicitely deleted" do
      it "still removes the channel from the facts channellist" do
        @ch.sorted_cached_facts.delete @f
        @ch.sorted_delete_facts.add @f

        Fact.should_receive(:[]).with(@f.id).and_return(@f)
        @f.channels.should_receive(:delete).with(@ch)
        RemoveFactFromChannel.perform @f.id, @ch.id
      end
    end
  end
end
```
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