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require 'java'
describe "A Java object's java_send method" do
before :each do
@list = java.util.ArrayList.new
@integer = java.lang.Integer.new(1)
end
it "works with name only for no-arg methods" do
@list.java_send(:toString).should == "[]"
java.lang.System.java_send(:currentTimeMillis).class.should == Fixnum
end
it "works with name plus empty arg list for no-arg methods" do
@list.java_send(:toString, []).should == "[]"
java.lang.System.java_send(:currentTimeMillis, []).class.should == Fixnum
end
it "works with a signature" do
@list.java_send :add, [Java::int, java.lang.Object], 0, 'foo'
@list.to_s.should == "[foo]"
java_home = java.lang.System.java_send(:getProperty, [java.lang.String], 'java.home')
java_home.should == java.lang.System.getProperty('java.home')
str = java.lang.StringBuilder.new
str.java_send :append, [Java::long], 1234567890
str.to_s.should == '1234567890'
str.java_send :append, [java.lang.String], " str1"
str.to_s.should == '1234567890 str1'
str.java_send :append, [java.lang.CharSequence], " str2"
str.to_s.should == '1234567890 str1 str2'
str.java_send :append, [Java::char[], Java::int, Java::int], " str3".to_java.to_char_array, 0, 4
str.to_s.should == '1234567890 str1 str2 str'
buf = java::lang::StringBuffer.new(' buf ')
begin
str.java_send :append, [Java::JavaLang::String], buf
rescue TypeError
else; fail end
str.java_send :append, [java.lang.CharSequence.java_class], buf
str.to_s.should == '1234567890 str1 str2 str buf '
end
it "works with package-level classes" do
array = Java::int[16].new
array[1] = 10; array[2] = 20
buffer = java.nio.IntBuffer.wrap array # returns a Java::JavaNio::HeapIntBuffer
buffer.java_send(:get, [ Java::int ], 1).should == 10
buffer.java_send(:get).should == 0
buffer.java_send(:get).should == 10
buffer.java_send(:get, []).should == 20
end
it "works with private classes" do
array = Java::int[16].new
array[1] = 10; array[2] = 20
map = java.util.HashMap.new
key_type = java.lang.String.java_class
val_type = java.lang.Number.java_class
map = java.util.Collections.checkedMap(map, key_type, val_type) # returns a private CheckedMap instance
map.java_send(:clear)
map.java_send(:put, [ Java::JavaLang::Object, Java::JavaLang::Object ], '1', 1.to_java)
map.java_send(:get, [ Java::JavaLang::Object ], '').should == nil
map.java_send(:get, [ Java::JavaLang::Object ], '1').should == 1
end
it "raises NameError if the method can't be found" do
lambda do
@list.java_send :foobar
end.should raise_error(NameError)
lambda do
@list.java_send :add, [Java::long, java.lang.Object], 0, 'foo'
end.should raise_error(NameError)
lambda do
java.lang.System.java_send :foobar
end.should raise_error(NameError)
lambda do
java.lang.System.java_send :getProperty, [Java::long, Java::long], 0, 0
end.should raise_error(NameError)
end
it "raises ArgumentError if type count doesn't match arg count" do
lambda do
@list.java_send :add, [Java::int, java.lang.Object], 0, 'foo', 'bar'
end.should raise_error(ArgumentError)
lambda do
java.lang.System.java_send :getProperty, [java.lang.String], "foo", "bar"
end.should raise_error(ArgumentError)
end
end
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