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|
require_relative '../spec_helper'
require_relative 'fixtures/ensure'
describe "An ensure block inside a begin block" do
before :each do
ScratchPad.record []
end
it "is executed when an exception is raised in it's corresponding begin block" do
lambda {
begin
ScratchPad << :begin
raise EnsureSpec::Error
ensure
ScratchPad << :ensure
end
}.should raise_error(EnsureSpec::Error)
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when an exception is raised and rescued in it's corresponding begin block" do
begin
ScratchPad << :begin
raise "An exception occurred!"
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ScratchPad.recorded.should == [:begin, :rescue, :ensure]
end
it "is executed even when a symbol is thrown in it's corresponding begin block" do
catch(:symbol) do
begin
ScratchPad << :begin
throw(:symbol)
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
end
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when nothing is raised or thrown in it's corresponding begin block" do
begin
ScratchPad << :begin
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ScratchPad.recorded.should == [:begin, :ensure]
end
it "has no return value" do
begin
:begin
ensure
:ensure
end.should == :begin
end
it "sets exception cause if raises exception in block and in ensure" do
-> {
begin
raise "from block"
ensure
raise "from ensure"
end
}.should raise_error(RuntimeError, "from ensure") do |e|
e.cause.message.should == "from block"
end
end
end
describe "The value of an ensure expression," do
it "in no-exception scenarios, is the value of the last statement of the protected body" do
begin
v = 1
eval('x=1') # to prevent opts from triggering
v
ensure
v = 2
end.should == 1
end
it "when an exception is rescued, is the value of the rescuing block" do
begin
raise 'foo'
rescue
v = 3
ensure
v = 2
end.should == 3
end
end
describe "An ensure block inside a method" do
before :each do
@obj = EnsureSpec::Container.new
end
it "is executed when an exception is raised in the method" do
lambda { @obj.raise_in_method_with_ensure }.should raise_error(EnsureSpec::Error)
@obj.executed.should == [:method, :ensure]
end
it "is executed when an exception is raised and rescued in the method" do
@obj.raise_and_rescue_in_method_with_ensure
@obj.executed.should == [:method, :rescue, :ensure]
end
it "is executed even when a symbol is thrown in the method" do
catch(:symbol) { @obj.throw_in_method_with_ensure }
@obj.executed.should == [:method, :ensure]
end
it "has no impact on the method's implicit return value" do
@obj.implicit_return_in_method_with_ensure.should == :method
end
it "has an impact on the method's explicit return value" do
@obj.explicit_return_in_method_with_ensure.should == :ensure
end
it "has an impact on the method's explicit return value from rescue if returns explicitly" do
@obj.explicit_return_in_rescue_and_explicit_return_in_ensure.should == "returned in ensure"
end
it "has no impact on the method's explicit return value from rescue if returns implicitly" do
@obj.explicit_return_in_rescue_and_implicit_return_in_ensure.should == "returned in rescue"
end
it "suppresses exception raised in method if returns value explicitly" do
@obj.raise_and_explicit_return_in_ensure.should == "returned in ensure"
end
it "suppresses exception raised in rescue if returns value explicitly" do
@obj.raise_in_rescue_and_explicit_return_in_ensure.should == "returned in ensure"
end
it "overrides exception raised in rescue if raises exception itself" do
-> {
@obj.raise_in_rescue_and_raise_in_ensure
}.should raise_error(RuntimeError, "raised in ensure")
end
it "suppresses exception raised in method if raises exception itself" do
-> {
@obj.raise_in_method_and_raise_in_ensure
}.should raise_error(RuntimeError, "raised in ensure")
end
end
describe "An ensure block inside a class" do
before :each do
ScratchPad.record []
end
it "is executed when an exception is raised" do
lambda {
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
raise EnsureSpec::Error
ensure
ScratchPad << :ensure
end
ruby
}.should raise_error(EnsureSpec::Error)
ScratchPad.recorded.should == [:class, :ensure]
end
it "is executed when an exception is raised and rescued" do
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
raise
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:class, :rescue, :ensure]
end
it "is executed even when a symbol is thrown" do
catch(:symbol) do
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
throw(:symbol)
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
end
ScratchPad.recorded.should == [:class, :ensure]
end
it "is executed when nothing is raised or thrown" do
eval <<-ruby
class EnsureInClassExample
ScratchPad << :class
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:class, :ensure]
end
it "has no return value" do
result = eval <<-ruby
class EnsureInClassExample
:class
ensure
:ensure
end
ruby
result.should == :class
end
end
describe "An ensure block inside {} block" do
it "is not allowed" do
lambda {
eval <<-ruby
lambda {
raise
ensure
}
ruby
}.should raise_error(SyntaxError)
end
end
ruby_version_is "2.5" do
describe "An ensure block inside 'do end' block" do
before :each do
ScratchPad.record []
end
it "is executed when an exception is raised in it's corresponding begin block" do
lambda {
eval(<<-ruby).call
lambda do
ScratchPad << :begin
raise EnsureSpec::Error
ensure
ScratchPad << :ensure
end
ruby
}.should raise_error(EnsureSpec::Error)
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when an exception is raised and rescued in it's corresponding begin block" do
eval(<<-ruby).call
lambda do
ScratchPad << :begin
raise "An exception occurred!"
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:begin, :rescue, :ensure]
end
it "is executed even when a symbol is thrown in it's corresponding begin block" do
catch(:symbol) do
eval(<<-ruby).call
lambda do
ScratchPad << :begin
throw(:symbol)
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
end
ScratchPad.recorded.should == [:begin, :ensure]
end
it "is executed when nothing is raised or thrown in it's corresponding begin block" do
eval(<<-ruby).call
lambda do
ScratchPad << :begin
rescue
ScratchPad << :rescue
ensure
ScratchPad << :ensure
end
ruby
ScratchPad.recorded.should == [:begin, :ensure]
end
it "has no return value" do
result = eval(<<-ruby).call
lambda do
:begin
ensure
:ensure
end
ruby
result.should == :begin
end
end
end
|
