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require File.dirname(__FILE__) + "/../../spec_helper"
require 'jruby'
require 'jruby/compiler'
describe "A Ruby class generating a Java stub" do
def generate(script)
node = JRuby.parse(script)
# we use __FILE__ so there's something for it to read
JRuby::Compiler::JavaGenerator.generate_java node, __FILE__
end
EMPTY_INITIALIZE_PATTERN =
/public\s+Foo\(\) {\s+this\(__ruby__, __metaclass__\);\s+Helpers.invoke\(.*, this, "initialize"\);/
OBJECT_INITIALIZE_PATTERN =
/public\s+Foo\(Object \w+\) {\s+this\(__ruby__, __metaclass__\);\s+IRubyObject \w+ = JavaUtil.convertJavaToRuby\(__ruby__, \w+\);\s+Helpers.invoke\(.*, this, "initialize", .*\);/
STRING_INITIALIZE_PATTERN =
/public\s+Foo\(String \w+\) {\s+this\(__ruby__, __metaclass__\);\s+IRubyObject \w+ = JavaUtil.convertJavaToRuby\(__ruby__, \w+\);\s+Helpers.invoke\(.*, this, "initialize", .*\);/
describe "with no initialize method" do
it "generates a default constructor" do
cls = generate("class Foo; end").classes[0]
cls.constructor?.should be false
java = cls.to_s
java.should match EMPTY_INITIALIZE_PATTERN
end
end
describe "with an initialize method" do
describe "and a constructor java_signature on a another method" do
it "generates a default constructor" do
cls = generate("class Foo; def initialize(a); end; java_signature 'Foo()'; def default_cnstr(); end; end").classes[0]
cls.constructor?.should be true
init = cls.methods[0]
init.should_not be nil
init.name.should == "initialize"
init.constructor?.should == true
init.java_signature.to_s.should == "Object initialize(Object a)"
init.args.length.should == 1
java = init.to_s
java.should match OBJECT_INITIALIZE_PATTERN
def_cnstr = cls.methods[1]
def_cnstr.should_not be nil
def_cnstr.constructor?.should == true
def_cnstr.java_signature.to_s.should == "Foo()"
def_cnstr.args.length.should == 0
java = def_cnstr.to_s
java.should match EMPTY_INITIALIZE_PATTERN
end
end
describe "with no arguments" do
it "generates a default constructor" do
cls = generate("class Foo; def initialize; end; end").classes[0]
cls.constructor?.should be true
init = cls.methods[0]
init.should_not be nil
init.name.should == "initialize"
init.constructor?.should == true
init.java_signature.to_s.should == "Object initialize()"
init.args.length.should == 0
java = init.to_s
java.should match EMPTY_INITIALIZE_PATTERN
end
end
describe "with one argument and no java_signature" do
it "generates an (Object) constructor" do
cls = generate("class Foo; def initialize(a); end; end").classes[0]
cls.constructor?.should be true
init = cls.methods[0]
init.name.should == "initialize"
init.constructor?.should == true
init.java_signature.to_s.should == "Object initialize(Object a)"
init.args.length.should == 1
init.args[0].should == 'a'
java = init.to_s
java.should match OBJECT_INITIALIZE_PATTERN
end
end
describe "with one argument and a java_signature" do
it "generates a type-appropriate constructor" do
cls = generate("class Foo; java_signature 'Foo(String)'; def initialize(a); end; end").classes[0]
cls.constructor?.should be true
init = cls.methods[0]
init.name.should == "initialize"
init.constructor?.should == true
init.java_signature.should_not == nil
init.java_signature.to_s.should == "Foo(String)"
init.args.length.should == 1
init.args[0].should == 'a'
java = init.to_s
java.should match STRING_INITIALIZE_PATTERN
end
end
describe "with throws clause" do
it "generates a throws clause" do
cls = generate("class Foo; java_signature 'Foo() throws FooBarException'; def initialize(); end; end").classes[0]
method = cls.methods[0]
method.java_signature.to_s.should == 'Foo() throws FooBarException'
end
it 'generates a throws clause for more than one exception' do
cls = generate("class Foo; java_signature 'Foo() throws FooBarException,QuxBazException'; def initialize(); end; end").classes[0]
method = cls.methods[0]
method.java_signature.to_s.should == 'Foo() throws FooBarException, QuxBazException'
end
end
end
end
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