text: # coding: utf-8
  
  describe PDF::Reader::Filter do
  
    describe "#with" do
      context "when passed :ASCII85Decode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:ASCII85Decode)).to be_a(PDF::Reader::Filter::Ascii85)
        end
      end
  
      context "when passed :ASCIIHexDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:ASCIIHexDecode)).to be_a(PDF::Reader::Filter::AsciiHex)
        end
      end
  
      context "when passed :CCITTFaxDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:CCITTFaxDecode)).to be_a(PDF::Reader::Filter::Null)
        end
      end
  
      context "when passed :DCTDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:DCTDecode)).to be_a(PDF::Reader::Filter::Null)
        end
      end
  
      context "when passed :ASCII85Decode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:ASCII85Decode)).to be_a(PDF::Reader::Filter::Ascii85)
        end
      end
  
      context "when passed :FlateDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:FlateDecode)).to be_a(PDF::Reader::Filter::Flate)
        end
      end
  
      context "when passed :JBIG2ecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:JBIG2Decode)).to be_a(PDF::Reader::Filter::Null)
        end
      end
  
      context "when passed :JPXDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:JPXDecode)).to be_a(PDF::Reader::Filter::Null)
        end
      end
  
      context "when passed :LZWDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:LZWDecode)).to be_a(PDF::Reader::Filter::Lzw)
        end
      end
  
      context "when passed :RunLengthDecode" do
        it "returns the appropriate class" do
          expect(PDF::Reader::Filter.with(:RunLengthDecode)).to be_a(PDF::Reader::Filter::RunLength)
        end
      end
  
      context "when passed an unrecognised filter" do
        it "raises an exception" do
          expect {
            PDF::Reader::Filter.with(:FooDecode)
          }.to raise_error(PDF::Reader::UnsupportedFeatureError)
        end
      end
    end
  end
  