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# frozen_string_literal: true
RSpec.describe TTY::Color::Support, "#support?" do
it "doesn't check color support for non tty terminal" do
support = described_class.new({})
allow(TTY::Color).to receive(:tty?).and_return(false)
expect(support.support?).to eq(false)
end
it "disables color support when NO_COLOR is set" do
support = described_class.new({"NO_COLOR" => "1"})
expect(support.support?).to eq(false)
expect(support).to be_disabled
end
it "fails to find out color support" do
support = described_class.new({})
allow(TTY::Color).to receive(:tty?).and_return(true)
allow(support).to receive(:from_curses).and_return(TTY::Color::NoValue)
allow(support).to receive(:from_tput).and_return(TTY::Color::NoValue)
allow(support).to receive(:from_term).and_return(TTY::Color::NoValue)
allow(support).to receive(:from_env).and_return(TTY::Color::NoValue)
expect(support.support?).to eq(false)
expect(support).to have_received(:from_term).ordered
expect(support).to have_received(:from_tput).ordered
expect(support).to have_received(:from_env).ordered
expect(support).to have_received(:from_curses).ordered
end
it "detects color support" do
support = described_class.new({"TERM" => "xterm"})
allow(TTY::Color).to receive(:tty?).and_return(true)
allow(support).to receive(:from_tput)
expect(support.support?).to eq(true)
expect(support).to_not have_received(:from_tput)
end
context "#from_curses" do
it "fails to load curses for color support" do
support = described_class.new({})
allow(TTY::Color).to receive(:windows?).and_return(false)
allow(support).to receive(:require).with("curses").and_raise(LoadError)
allow(support).to receive(:warn)
expect(support.from_curses).to eq(TTY::Color::NoValue)
expect(support).to_not have_received(:warn)
end
it "fails to find Curses namespace" do
support = described_class.new({})
allow(TTY::Color).to receive(:windows?).and_return(false)
allow(support).to receive(:require).with("curses")
expect(support.from_curses).to eq(TTY::Color::NoValue)
end
it "sets verbose mode on" do
support = described_class.new({}, verbose: true)
allow(TTY::Color).to receive(:windows?).and_return(false)
allow(support).to receive(:require).with("curses").and_raise(LoadError)
allow(support).to receive(:warn)
support.from_curses
expect(support).to have_received(:warn).with(/no native curses support/)
end
it "loads curses for color support" do
support = described_class.new({})
allow(TTY::Color).to receive(:windows?).and_return(false)
allow(support).to receive(:require).with("curses").and_return(true)
stub_const("Curses", Object.new)
curses = double(:curses)
allow(curses).to receive(:init_screen)
allow(curses).to receive(:has_colors?).and_return(true)
allow(curses).to receive(:close_screen)
expect(support.from_curses(curses)).to eql(true)
expect(curses).to have_received(:has_colors?)
end
it "doesn't check on windows" do
support = described_class.new({})
allow(TTY::Color).to receive(:windows?).and_return(true)
expect(support.from_curses).to eq(TTY::Color::NoValue)
end
end
context "#from_term" do
it "fails to find color for dumb terminal" do
support = described_class.new({"TERM" => "dumb"})
expect(support.from_term).to eq(false)
end
it "inspects term variable for color capabilities" do
support = described_class.new({"TERM" => "xterm"})
expect(support.from_term).to eq(true)
support = described_class.new({"TERM" => "tmux-256color"})
expect(support.from_term).to eq(true)
end
it "fails to find color capabilities from term variable " do
support = described_class.new({"TERM" => "atari"})
expect(support.from_term).to eq(TTY::Color::NoValue)
end
end
context "#from_tput" do
it "fails to find tput utilty" do
support = described_class.new({})
allow(TTY::Color).to receive(:command?).with("tput colors").and_return(nil)
expect(support.from_tput).to eq(TTY::Color::NoValue)
end
it "runs tput and detects 8 colors" do
allow(TTY::Color).to receive(:command?).with("tput colors").and_return(true)
support = described_class.new({})
allow(support).to receive(:`).and_return("8")
expect(support.from_tput).to eq(true)
end
it "runs tput but finds no colors" do
allow(TTY::Color).to receive(:command?).with("tput colors").and_return(true)
support = described_class.new({})
allow(support).to receive(:`).and_return("2")
expect(support.from_tput).to eq(false)
end
it "raises error when running tput" do
allow(TTY::Color).to receive(:command?).with("tput colors").and_return(true)
support = described_class.new({})
allow(support).to receive(:`).and_raise(Errno::ENOENT)
expect(support.from_tput).to eq(TTY::Color::NoValue)
end
end
context "#from_env" do
it "finds color support in colorterm variable" do
support = described_class.new({"COLORTERM" => true})
expect(support.from_env).to eq(true)
end
it "finds ansicon support" do
support = described_class.new({"ANSICON" => true})
expect(support.from_env).to eq(true)
end
it "doesn't find any keys in environment" do
support = described_class.new({})
expect(support.from_env).to eq(TTY::Color::NoValue)
end
end
end
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