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pry--pry/spec/pry_spec.rb

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require_relative 'helper'
describe Pry do
before do
@str_output = StringIO.new
end
describe "Exotic object support" do
# regression test for exotic object support
it "Should not error when return value is a BasicObject instance" do
ReplTester.start do
input('BasicObject.new').should =~ /^=> #<BasicObject:/
end
end
end
describe 'DISABLE_PRY' do
before do
ENV['DISABLE_PRY'] = 'true'
end
after do
ENV.delete 'DISABLE_PRY'
end
it 'should not binding.pry' do
binding.pry.should == nil
end
it 'should not Pry.start' do
Pry.start.should == nil
end
end
describe "Pry.critical_section" do
it "should prevent Pry being called" do
output = StringIO.new
Pry.config.output = output
Pry.critical_section do
Pry.start
end
output.string.should =~ /Pry started inside Pry/
end
end
describe "Pry.binding_for" do
# regression test for burg's bug (see git history)
it "Should not error when object doesn't have a valid == method" do
o = Object.new
def o.==(other)
raise
end
lambda { Pry.binding_for(o) }.should.not.raise Exception
end
it "should not leak local variables" do
[Object.new, Array, 3].each do |obj|
Pry.binding_for(obj).eval("local_variables").should.be.empty
end
end
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it "should work on frozen objects" do
a = "hello".freeze
Pry.binding_for(a).eval("self").should.equal? a
end
end
describe "#last_exception=" do
before do
@pry = Pry.new binding: binding
@e = mock_exception "foo.rb:1"
end
it "returns an instance of Pry::LastException" do
@pry.last_exception = @e
@pry.last_exception.wrapped_exception.should == @e
end
it "returns a frozen exception" do
@pry.last_exception = @e.freeze
@pry.last_exception.should.be.frozen?
end
it "returns an object who mirrors itself as the wrapped exception" do
@pry.last_exception = @e.freeze
@pry.last_exception.should.be.instance_of?(StandardError)
end
end
describe "open a Pry session on an object" do
describe "rep" do
before do
class Hello
end
end
after do
Object.send(:remove_const, :Hello)
end
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# bug fix for https://github.com/banister/pry/issues/93
it 'should not leak pry constants into Object namespace' do
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lambda{
pry_eval(Object.new, "Command")
}.should.raise(NameError)
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end
it 'should be able to operate inside the BasicObject class' do
pry_eval(BasicObject, ":foo", "Pad.obj = _")
Pad.obj.should == :foo
end
it 'should set an ivar on an object' do
o = Object.new
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pry_eval(o, "@x = 10")
o.instance_variable_get(:@x).should == 10
end
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it 'should display error if Pry instance runs out of input' do
redirect_pry_io(StringIO.new, @str_output) do
Pry.start
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end
@str_output.string.should =~ /Error: Pry ran out of things to read/
end
it 'should make self evaluate to the receiver of the rep session' do
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o = :john
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pry_eval(o, "self").should == o
end
it 'should define a nested class under Hello and not on top-level or Pry' do
mock_pry(Pry.binding_for(Hello), "class Nested", "end")
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Hello.const_defined?(:Nested).should == true
end
it 'should suppress output if input ends in a ";" and is an Exception object (single line)' do
mock_pry("Exception.new;").should == ""
end
it 'should suppress output if input ends in a ";" (single line)' do
mock_pry("x = 5;").should == ""
end
it 'should be able to evaluate exceptions normally' do
was_called = false
mock_pry("RuntimeError.new", :exception_handler => proc{ was_called = true })
was_called.should == false
end
it 'should notice when exceptions are raised' do
was_called = false
mock_pry("raise RuntimeError", :exception_handler => proc{ was_called = true })
was_called.should == true
end
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it 'should not try to catch intended exceptions' do
lambda { mock_pry("raise SystemExit") }.should.raise SystemExit
# SIGTERM
lambda { mock_pry("raise SignalException.new(15)") }.should.raise SignalException
end
describe "multi-line input" do
it "works" do
mock_pry('x = ', '1 + 4').should =~ /5/
end
it 'should suppress output if input ends in a ";" (multi-line)' do
mock_pry('def self.blah', ':test', 'end;').should == ''
end
describe "newline stripping from an empty string" do
it "with double quotes" do
mock_pry('"', '"').should =~ %r|"\\n"|
mock_pry('"', "\n", "\n", "\n", '"').should =~ %r|"\\n\\n\\n\\n"|
end
it "with single quotes" do
mock_pry("'", "'").should =~ %r|"\\n"|
mock_pry("'", "\n", "\n", "\n", "'").should =~ %r|"\\n\\n\\n\\n"|
end
it "with fancy delimiters" do
mock_pry('%(', ')').should =~ %r|"\\n"|
mock_pry('%|', "\n", "\n", '|').should =~ %r|"\\n\\n\\n"|
mock_pry('%q[', "\n", "\n", ']').should =~ %r|"\\n\\n\\n"|
end
end
describe "newline stripping from an empty regexp" do
it "with regular regexp delimiters" do
mock_pry('/', '/').should =~ %r{/\n/}
end
it "with fancy delimiters" do
mock_pry('%r{', "\n", "\n", '}').should =~ %r{/\n\n\n/}
mock_pry('%r<', "\n", '>').should =~ %r{/\n\n/}
end
end
describe "newline from an empty heredoc" do
it "works" do
mock_pry('<<HERE', 'HERE').should =~ %r|""|
mock_pry("<<'HERE'", "\n", 'HERE').should =~ %r|"\\n"|
mock_pry("<<-'HERE'", "\n", "\n", 'HERE').should =~ %r|"\\n\\n"|
end
end
end
end
describe "repl" do
describe "basic functionality" do
it 'should set an ivar on an object and exit the repl' do
input_strings = ["@x = 10", "exit-all"]
input = InputTester.new(*input_strings)
o = Object.new
pry_tester = Pry.start(o, :input => input, :output => StringIO.new)
o.instance_variable_get(:@x).should == 10
end
end
describe "complete_expression?" do
it "should not mutate the input!" do
clean = "puts <<-FOO\nhi\nFOO\n"
a = clean.dup
Pry::Code.complete_expression?(a)
a.should == clean
end
end
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describe "history arrays" do
it 'sets _ to the last result' do
t = pry_tester
t.eval ":foo"
t.eval("_").should == :foo
t.eval "42"
t.eval("_").should == 42
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end
it 'sets out to an array with the result' do
t = pry_tester
t.eval ":foo"
t.eval "42"
res = t.eval "_out_"
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res.should.be.kind_of Pry::HistoryArray
res[1..2].should == [:foo, 42]
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end
it 'sets _in_ to an array with the entered lines' do
t = pry_tester
t.eval ":foo"
t.eval "42"
res = t.eval "_in_"
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res.should.be.kind_of Pry::HistoryArray
res[1..2].should == [":foo\n", "42\n"]
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end
it 'uses 100 as the size of _in_ and _out_' do
pry_tester.eval("[_in_.max_size, _out_.max_size]").should == [100, 100]
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end
it 'can change the size of the history arrays' do
pry_tester(:memory_size => 1000).eval("[_out_, _in_].map(&:max_size)").should == [1000, 1000]
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end
it 'store exceptions' do
mock_pry("foo!", "Pad.in = _in_[-1]; Pad.out = _out_[-1]")
Pad.in.should == "foo!\n"
Pad.out.should.be.kind_of NoMethodError
end
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end
describe "last_result" do
it "should be set to the most recent value" do
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pry_eval("2", "_ + 82").should == 84
end
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# This test needs mock_pry because the command retvals work by
# replacing the eval_string, so _ won't be modified without Pry doing
# a REPL loop.
it "should be set to the result of a command with :keep_retval" do
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Pry::Commands.block_command '++', '', :keep_retval => true do |a|
a.to_i + 1
end
mock_pry('++ 86', '++ #{_}').should =~ /88/
end
it "should be preserved over an empty line" do
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pry_eval("2 + 2", " ", "\t", " ", "_ + 92").should == 96
end
it "should be preserved when evalling a command without :keep_retval" do
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pry_eval("2 + 2", "ls -l", "_ + 96").should == 100
end
end
describe "nesting" do
after do
Pry.reset_defaults
Pry.config.color = false
end
it 'should nest properly' do
Pry.config.input = InputTester.new("cd 1", "cd 2", "cd 3", "\"nest:\#\{(_pry_.binding_stack.size - 1)\}\"", "exit-all")
Pry.config.output = @str_output
o = Object.new
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pry_tester = o.pry
@str_output.string.should =~ /nest:3/
end
end
describe "defining methods" do
it 'should define a method on the singleton class of an object when performing "def meth;end" inside the object' do
[Object.new, {}, []].each do |val|
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pry_eval(val, 'def hello; end')
val.methods(false).map(&:to_sym).include?(:hello).should == true
end
end
it 'should define an instance method on the module when performing "def meth;end" inside the module' do
hello = Module.new
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pry_eval(hello, "def hello; end")
hello.instance_methods(false).map(&:to_sym).include?(:hello).should == true
end
it 'should define an instance method on the class when performing "def meth;end" inside the class' do
hello = Class.new
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pry_eval(hello, "def hello; end")
hello.instance_methods(false).map(&:to_sym).include?(:hello).should == true
end
it 'should define a method on the class of an object when performing "def meth;end" inside an immediate value or Numeric' do
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[:test, 0, true, false, nil,
(0.0 unless Pry::Helpers::BaseHelpers.jruby?)].each do |val|
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pry_eval(val, "def hello; end");
val.class.instance_methods(false).map(&:to_sym).include?(:hello).should == true
end
end
end
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describe "Object#pry" do
after do
Pry.reset_defaults
Pry.config.color = false
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end
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it "should start a pry session on the receiver (first form)" do
Pry.config.input = InputTester.new("self", "exit-all")
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str_output = StringIO.new
Pry.config.output = str_output
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20.pry
str_output.string.should =~ /20/
end
it "should start a pry session on the receiver (second form)" do
Pry.config.input = InputTester.new("self", "exit-all")
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str_output = StringIO.new
Pry.config.output = str_output
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pry 20
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str_output.string.should =~ /20/
end
it "should raise if more than two arguments are passed to Object#pry" do
lambda { pry(20, :quiet, :input => Readline) }.should.raise ArgumentError
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end
end
describe "Pry.binding_for" do
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it 'should return TOPLEVEL_BINDING if parameter self is main' do
_main_ = lambda { TOPLEVEL_BINDING.eval('self') }
Pry.binding_for(_main_.call).is_a?(Binding).should == true
Pry.binding_for(_main_.call).should == TOPLEVEL_BINDING
Pry.binding_for(_main_.call).should == Pry.binding_for(_main_.call)
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end
end
end
end
describe 'setting custom options' do
it 'should not raise for unrecognized options' do
should.not.raise?(NoMethodError) {
instance = Pry.new(:custom_option => 'custom value')
}
end
end
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describe "a fresh instance" do
it "should use `caller` as its backtrace" do
location = "#{__FILE__}:#{__LINE__ + 1}"[1..-1] # omit leading .
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backtrace = Pry.new.backtrace
backtrace.should.not.be.nil
backtrace.any? { |l| l.include?(location) }.should.be.true
end
end
end