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describe Pry do
describe "output failsafe" do
after { Pry.config.print = Pry::Config.new.print }
it "should catch serialization exceptions" do
Pry.config.print = proc { raise "catch-22" }
expect { mock_pry("1") }.to_not raise_error
end
it "should display serialization exceptions" do
Pry.config.print = proc { raise "catch-22" }
expect(mock_pry("1")).to match(/\(pry\) output error: #<RuntimeError: catch-22>/)
end
it "should catch errors serializing exceptions" do
Pry.config.print = proc do
ex = Exception.new("catch-22")
class << ex
def inspect
raise ex
end
end
raise ex
end
expect(mock_pry("1")).to match(/\(pry\) output error: failed to show result/)
end
end
describe "default print" do
it "should output the right thing" do
expect(mock_pry("[1]")).to match(/^=> \[1\]/)
end
it "should include the =>" do
pry = Pry.new
accumulator = StringIO.new
pry.config.output = accumulator
pry.config.print.call(accumulator, [1], pry)
expect(accumulator.string).to eq("=> \[1\]\n")
end
it "should not be phased by un-inspectable things" do
expect(mock_pry("class NastyClass; undef pretty_inspect; end", "NastyClass.new"))
.to match(/#<.*NastyClass:0x.*?>/)
end
it "doesn't leak colour for object literals" do
expect(mock_pry("Object.new")).to match(/=> #<Object:0x[a-z0-9]+>\n/)
end
end
describe "output_prefix" do
it "should be able to change output_prefix" do
pry = Pry.new
accumulator = StringIO.new
pry.config.output = accumulator
pry.config.output_prefix = "-> "
pry.config.print.call(accumulator, [1], pry)
expect(accumulator.string).to eq("-> \[1\]\n")
end
end
describe "color" do
before do
Pry.config.color = true
end
after do
Pry.config.color = false
end
it "should colorize strings as though they were ruby" do
pry = Pry.new
accumulator = StringIO.new
colorized = Pry::SyntaxHighlighter.highlight('[1]')
pry.config.output = accumulator
pry.config.print.call(accumulator, [1], pry)
expect(accumulator.string).to eq("=> #{colorized}\n")
end
it "should not colorize strings that already include color" do
pry = Pry.new
f = Object.new
def f.inspect
"\e[1;31mFoo\e[0m"
end
accumulator = StringIO.new
pry.config.output = accumulator
pry.config.print.call(accumulator, f, pry)
# We add an extra \e[0m to prevent color leak
expect(accumulator.string).to eq("=> \e[1;31mFoo\e[0m\e[0m\n")
end
end
describe "output suppression" do
before do
@t = pry_tester
end
it "should normally output the result" do
expect(mock_pry("1 + 2")).to eq("=> 3\n")
end
it "should not output anything if the input ends with a semicolon" do
expect(mock_pry("1 + 2;")).to eq("")
end
it "should output something if the input ends with a comment" do
expect(mock_pry("1 + 2 # basic addition")).to eq("=> 3\n")
end
it "should not output something if the input is only a comment" do
expect(mock_pry("# basic addition")).to eq("")
end
end
describe "custom non-IO object as $stdout" do
it "does not crash pry" do
old_stdout = $stdout
pry_eval = pry_tester(binding)
expect(pry_eval.eval("$stdout = Class.new { def write(*) end }.new", ":ok"))
.to eq(:ok)
$stdout = old_stdout
end
end
end
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