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require_relative '../helper'
describe "watch expression" do
# Custom eval that will:
# 1) Create an instance of pry that can use for multiple calls
# 2) Exercise the after_eval hook
# 3) Return the output
def eval(expr)
output = @tester.eval expr
@tester.pry.hooks.exec_hook :after_eval, nil, @tester.pry
output
end
before do
@tester = pry_tester
@tester.pry.hooks.clear :after_eval
eval "watch --delete"
end
it "registers the after_eval hook" do
eval 'watch 1+1'
@tester.pry.hooks.hook_exists?(:after_eval, :watch_expression).should == true
end
it "prints no watched expressions" do
eval('watch').should =~ /No watched expressions/
end
it "watches an expression" do
eval "watch 1+1"
eval('watch').should =~ /=> 2/
end
it "watches a local variable" do
eval 'foo = :bar'
eval 'watch foo'
eval('watch').should =~ /=> :bar/
end
it "prints when an expression changes" do
ReplTester.start do
input 'a = 1'
output '=> 1'
input 'watch a'
output "Watching a\nwatch: a => 1"
input "a = 2"
output "watch: a => 2\n=> 2"
end
end
it "prints when an expression is mutated" do
ReplTester.start do
input 'a = "one"'
output '=> "one"'
input 'watch a'
output %(Watching a\nwatch: a => "one")
input "a.sub! 'o', 'p'"
output %(watch: a => "pne"\n=> "pne")
end
end
it "doesn't print when an expresison remains the same" do
ReplTester.start do
input 'a = 1'
output '=> 1'
input 'watch a'
output "Watching a\nwatch: a => 1"
input "a = 1"
output "=> 1"
end
end
it "continues to work if you start a second pry instance" do
ReplTester.start do
input 'a = 1'
output '=> 1'
input 'watch a'
output "Watching a\nwatch: a => 1"
input "a = 2"
output "watch: a => 2\n=> 2"
end
ReplTester.start do
input 'b = 1'
output '=> 1'
input 'watch b'
output "Watching b\nwatch: b => 1"
input "b = 2"
output "watch: b => 2\n=> 2"
end
end
describe "deleting expressions" do
before do
eval 'watch :keeper'
eval 'watch :delete'
eval 'watch -d 2'
end
it "keeps keeper" do
eval('watch').should =~ /keeper/
end
it "deletes delete" do
eval('watch').should.not =~ /delete/
end
end
end
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