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# typed: false
# coding: utf-8
describe PDF::Reader::Font do
let(:object_hash) { PDF::Reader::ObjectHash.allocate }
describe "to_utf8()" do
context "with no ToUnicode CMap" do
let(:font) { PDF::Reader::Font.new(object_hash, {}) }
it "delegates to an Encoding object to convert strings to utf-8" do
encoding = double
font.encoding = encoding
expect(encoding).to receive(:to_utf8).with("hello")
font.to_utf8("hello")
end
it "delegates to an Encoding object to convert arrays of strings to utf-8" do
encoding = double
font.encoding = encoding
expect(encoding).to receive(:to_utf8).with("hello")
expect(encoding).to receive(:to_utf8).with("howdy")
font.to_utf8(["hello", "howdy"])
end
it "returns a string when to_utf8 is called with a string or array" do
expect(font.to_utf8("abc")).to be_a_kind_of(String)
expect(font.to_utf8(["abc"])).to be_a_kind_of(String)
end
it "converts integers to a utf-8 string" do
expect(font.to_utf8(123)).to be_a_kind_of(String)
end
it "uses an encoding of StandardEncoding if none has been specified" do
str = "abc\xA8"
expect(font.to_utf8(str)).to eql("abc\xC2\xA4")
end
end
context "with a ToUnicode CMap" do
let(:font) { PDF::Reader::Font.new(object_hash, {}) }
it "delegates to a CMap object to convert strings to utf-8" do
cmap = double
expect(cmap).to receive(:decode).with(104).and_return(104)
expect(cmap).to receive(:decode).with(101).and_return(104)
expect(cmap).to receive(:decode).with(108).and_return(104)
expect(cmap).to receive(:decode).with(108).and_return(104)
expect(cmap).to receive(:decode).with(111).and_return(104)
font.tounicode = cmap
font.to_utf8("hello")
end
it "doesn't delegate to an Encoding object to convert strings to utf-8" do
encoding = double
expect(encoding).not_to receive(:to_utf8)
expect(encoding).to receive(:unpack).and_return("C*")
font.encoding = encoding
cmap = double
expect(cmap).to receive(:decode).exactly(5).times.and_return(104)
font.tounicode = cmap
font.to_utf8("hello")
end
end
end
describe "unpack()" do
context "with a WinAnsi encoded font" do
let(:raw) do
{
:Encoding => :WinAnsiEncoding,
:Type => :Font
}
end
let(:font) { PDF::Reader::Font.new(object_hash, raw) }
it "unpacks a binary string into ints" do
expect(font.unpack("\x41\x42")).to eq([65,66])
end
end
end
describe "glyph_width()" do
context "with a FirstChar of 1" do
let(:raw) do
{
:Encoding => :WinAnsiEncoding,
:Type => :Font,
:FirstChar => 1,
:Widths => [100, 200, 300, 400]
}
end
let(:font) { PDF::Reader::Font.new(object_hash, raw) }
it "returns the width for a glyph" do
expect(font.glyph_width(2)).to eq(200)
end
it "returns 0 for an unknown glyph" do
expect(font.glyph_width(10)).to eq(0)
end
end
context "with a FirstChar of 5" do
let(:raw) do
{
:Encoding => :WinAnsiEncoding,
:Type => :Font,
:FirstChar => 5,
:Widths => [100, 200, 300, 400]
}
end
let(:font) { PDF::Reader::Font.new(object_hash, raw) }
it "returns the width for a glyph" do
expect(font.glyph_width(7)).to eq(300)
end
it "returns 0 for an unknown glyph" do
expect(font.glyph_width(20)).to eq(0)
end
end
end
end
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