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describe "cat" do
before do
@str_output = StringIO.new
@t = pry_tester do
def insert_nil_input
@pry.update_input_history(nil)
end
def last_exception=(e)
@pry.last_exception = e
end
end
end
describe "when invoked without arguments" do
it 'should display an error message' do
expect { @t.eval 'cat' }.to raise_error(Pry::CommandError, /Must provide a filename/)
end
end
describe "on receiving a file that does not exist" do
it 'should display an error message' do
expect { @t.eval 'cat supercalifragilicious66' }.to raise_error(StandardError, /Cannot open/)
end
end
describe "with --in" do
it 'should display the last few expressions with indices' do
expect(@t.eval('10', '20', 'cat --in')).to eq unindent(<<-STR)
1:
10
2:
20
STR
end
end
describe "with --in 1" do
it 'should display the first expression with no index' do
expect(@t.eval('10', '20', 'cat --in 1')).to eq("10\n")
end
end
describe "with --in -1" do
it 'should display the last expression with no index' do
expect(@t.eval('10', '20', 'cat --in -1')).to eq("20\n")
end
end
describe "with --in 1..2" do
it 'should display the given range with indices, omitting nils' do
@t.eval '10'
@t.insert_nil_input # normally happens when a command is executed
@t.eval ':hello'
expect(@t.eval('cat --in 1..3')).to eq unindent(<<-EOS)
1:
10
3:
:hello
EOS
end
end
describe "with --ex" do
before do
@o = Object.new
# this is to test exception code (cat --ex)
def @o.broken_method
this method is broken
end
end
it 'cat --ex should display repl code that generated exception' do
@t.eval unindent(<<-EOS)
begin
this raises error
rescue => e
_pry_.last_exception = e
end
EOS
expect(@t.eval('cat --ex')).to match(/\d+:(\s*) this raises error/)
end
it 'cat --ex should correctly display code that generated exception' do
begin
@o.broken_method
rescue => e
@t.last_exception = e
end
expect(@t.eval('cat --ex')).to match(/this method is broken/)
end
end
describe "with --ex N" do
it 'should cat first level of backtrace when --ex used with no argument ' do
temp_file do |f|
f << "bt number 1"
f.flush
@t.last_exception = mock_exception("#{f.path}:1", 'x', 'x')
expect(@t.eval('cat --ex')).to match(/bt number 1/)
end
end
it 'should cat first level of backtrace when --ex 0 used ' do
temp_file do |f|
f << "bt number 1"
f.flush
@t.last_exception = mock_exception("#{f.path}:1", 'x', 'x')
expect(@t.eval('cat --ex 0')).to match(/bt number 1/)
end
end
it 'should cat second level of backtrace when --ex 1 used ' do
temp_file do |f|
f << "bt number 2"
f.flush
@t.last_exception = mock_exception('x', "#{f.path}:1", 'x')
expect(@t.eval('cat --ex 1')).to match(/bt number 2/)
end
end
it 'should cat third level of backtrace when --ex 2 used' do
temp_file do |f|
f << "bt number 3"
f.flush
@t.last_exception = mock_exception('x', 'x', "#{f.path}:1")
expect(@t.eval('cat --ex 2')).to match(/bt number 3/)
end
end
it 'should show error when backtrace level out of bounds' do
@t.last_exception = mock_exception('x', 'x', 'x')
expect { @t.eval('cat --ex 3') }.to raise_error(Pry::CommandError, /out of bounds/)
end
it 'each successive cat --ex should show the next level of backtrace, and going past the final level should return to the first' do
temp_files = []
3.times do |i|
temp_files << Tempfile.new(['pry', '.rb'])
temp_files.last << "bt number #{i}"
temp_files.last.flush
end
@t.last_exception = mock_exception(*temp_files.map { |f| "#{f.path}:1" })
3.times do |i|
expect(@t.eval('cat --ex')).to match(/bt number #{i}/)
end
expect(@t.eval('cat --ex')).to match(/bt number 0/)
temp_files.each do |file|
file.close(true)
end
end
end
end
|
