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# typed: false
# 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
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