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require File.dirname(__FILE__) + "/../spec_helper"
require 'java'
describe "A Java Throwable" do
it "implements backtrace" do
ex = java.lang.Exception.new
trace = nil
expect {trace = ex.backtrace}.not_to raise_error
expect(trace).to eq(ex.stack_trace.map(&:to_s))
end
it "implements backtrace= as a no-op" do
ex = java.lang.IllegalStateException.new
backtrace = ex.backtrace
ex.set_backtrace ['blah']
expect(ex.backtrace).to eq backtrace
end
it "implements to_s as message" do
ex = java.lang.Exception.new
expect(ex.to_s).to eq ''
expect(ex.to_s).to eq ex.message
ex = java.lang.RuntimeException.new('hello')
expect(ex.to_s).to eq 'hello'
expect(ex.to_s).to eq ex.message
end
it "implements inspect to be Ruby-like" do
ex = java.lang.Exception.new('hello')
expect(ex.inspect).to eq '#<Java::JavaLang::Exception: hello>'
ex = java.lang.AssertionError.new
expect(ex.inspect).to eq '#<Java::JavaLang::AssertionError: >'
end
it "implements full_message" do
ex = java.lang.Exception.new('hello')
expect(ex.full_message).to match /hello \(Java::JavaLang::Exception\)/
expect(ex.full_message(:highlight => true, :order => :top)).to match /hello \(Java::JavaLang::Exception\)/
end
it "can be rescued by rescue Exception" do
begin
raise ex = java.lang.Exception.new
rescue Exception => e
expect(e).to eq(ex)
end
end
it "can be rescued by rescue java.lang.Throwable" do
begin
raise ex = java.lang.Exception.new
rescue java.lang.Exception => e
expect(e).to eq(ex)
end
end
it "can be rescued by rescue Object" do
begin
raise ex = java.lang.Exception.new
rescue Object => e
expect(e).to eq(ex)
end
end
end
describe "Rescuing a Java exception using Exception" do
it "does not prevent non-local return from working" do
x = Object.new
def x.foo
loop do
begin
return 1
rescue Exception
2
end
end
end
expect(x.foo).to eq 1
end
it "does not prevent non-local break from working" do
expect(loop do
begin
break 1
rescue Exception
2
end
end).to eq 1
end
it "does not prevent non-local redo from working" do
i = 0
loop do
begin
i += 1
redo if i < 2
break
rescue Exception
i = 3
end
end
expect(i).to eq 2
end
it "does not prevent catch/throw from working" do
expect do
catch :blah do
begin
throw :blah
rescue Exception
raise
end
end
end.not_to raise_error
end
it "does not prevent retry from working" do
i = 0
begin
i += 1
raise StandardError if i < 2
rescue StandardError
begin
retry
rescue Exception
i = 3
end
end
expect(i).to eq 2
end
it "synchronizes causes" do
ex = Class.new(StandardError)
begin
e = ex.new
expect(e.cause).to be_nil
raise e
rescue
begin
e2 = ex.new
expect(e2.cause).to be_nil
t = JRuby.ref(e2)
expect(t.getCause).to be_nil
raise e2
rescue
expect(e2.cause).to equal(e)
expect(t.getCause).to equal(e)
end
end
begin
e = java.lang.NullPointerException.new
raise e
rescue java.lang.NullPointerException
begin
e2 = ex.new
raise e2
rescue
expect(e2.cause).to equal(e)
expect(JRuby.ref(e2).toThrowable.getCause).to equal(e)
end
end
end
describe 'Ruby sub-class' do
class RubyThrowable < java.lang.Exception
def initialize(msg) super(); @msg = msg end
def getMessage; @msg end
end
it 'has Throwable extensions' do
throwable = RubyThrowable.new 'foo'
expect( throwable.backtrace ).to_not be_empty
expect( throwable.message ).to eql 'foo'
expect( throwable.inspect ).to eql '#<RubyThrowable: foo>'
end
end
end
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