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# typed: false
# coding: utf-8
describe PDF::Reader::WidthCalculator::BuiltIn do
it_behaves_like "a WidthCalculator duck type" do
let!(:font) { double(:basefont => :Helvetica) }
subject { PDF::Reader::WidthCalculator::BuiltIn.new(font)}
end
describe "#glyph_width" do
context "With Helvetica, StandardEncoding and no Widths" do
let!(:encoding) { PDF::Reader::Encoding.new(:StandardEncoding) }
let!(:font) { double(:basefont => :Helvetica,
:subtype => :TrueType,
:encoding => encoding,
:widths => []) }
let(:width_calculator) {
PDF::Reader::WidthCalculator::BuiltIn.new(font)
}
it "returns width 0 for code point 160(non breaking space)" do
expect(width_calculator.glyph_width(160)).to eq(0)
end
it "returns width 0 for code point 157(unknown)" do
expect(width_calculator.glyph_width(157)).to eq(0)
end
end
context "With Helvetica and a custom encoding that overwrites standard codepoints" do
# Codepoint 196 (tilde) is mapped to German umlaut Ä
let(:encoding) { PDF::Reader::Encoding.new({:Differences => [196, :Adieresis]}) }
let(:font) { double(:basefont => :Helvetica,
:subtype => :Type1,
:encoding => encoding) }
let(:width_calculator) {
PDF::Reader::WidthCalculator::BuiltIn.new(font)
}
it "returns the correct width for the overwritten codepoint" do
# tilde = 333, Ä = 667
expect(width_calculator.glyph_width(196)).to eq(667)
end
end
context "With Foo, a font that isn't part of the built-in 14" do
let!(:encoding) { PDF::Reader::Encoding.new(:WinAnsiEncoding) }
let!(:font) { double(:basefont => :Foo,
:subtype => :Type1,
:encoding => encoding,
:widths => []) }
let(:width_calculator) {
PDF::Reader::WidthCalculator::BuiltIn.new(font)
}
it "returns width 722 for code point 65 (A)" do
expect(width_calculator.glyph_width(65)).to eq(722)
end
end
end
end
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