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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
expect(@list.java_send(:toString)).to eq("[]")
expect(java.lang.System.java_send(:currentTimeMillis).class).to eq(Integer)
end
it "works with name plus empty arg list for no-arg methods" do
expect(@list.java_send(:toString, [])).to eq("[]")
expect(java.lang.System.java_send(:currentTimeMillis, []).class).to eq(Integer)
end
it "works with a signature" do
@list.java_send :add, [Java::int, java.lang.Object], 0, 'foo'
expect(@list.to_s).to eq("[foo]")
java_home = java.lang.System.java_send(:getProperty, [java.lang.String], 'java.home')
expect(java_home).to eq(java.lang.System.getProperty('java.home'))
str = java.lang.StringBuilder.new
str.java_send :append, [Java::long], 1234567890
expect(str.to_s).to eq('1234567890')
str.java_send :append, [java.lang.String], " str1"
expect(str.to_s).to eq('1234567890 str1')
str.java_send :append, [java.lang.CharSequence], " str2"
expect(str.to_s).to eq('1234567890 str1 str2')
str.java_send :append, [Java::char[], Java::int, Java::int], " str3".to_java.to_char_array, 0, 4
expect(str.to_s).to eq('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
expect(str.to_s).to eq('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
expect(buffer.java_send(:get, [ Java::int ], 1)).to eq(10)
expect(buffer.java_send(:get)).to eq(0)
expect(buffer.java_send(:get)).to eq(10)
expect(buffer.java_send(:get, [])).to eq(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)
expect(map.java_send(:get, [ Java::JavaLang::Object ], '')).to eq(nil)
expect(map.java_send(:get, [ Java::JavaLang::Object ], '1')).to eq(1)
end
it "raises NameError if the method can't be found" do
expect do
@list.java_send :foobar
end.to raise_error(NameError)
expect do
@list.java_send :add, [Java::long, java.lang.Object], 0, 'foo'
end.to raise_error(NameError)
expect do
java.lang.System.java_send :foobar
end.to raise_error(NameError)
expect do
java.lang.System.java_send :getProperty, [Java::long, Java::long], 0, 0
end.to raise_error(NameError)
end
it "raises ArgumentError if type count doesn't match arg count" do
expect do
@list.java_send :add, [Java::int, java.lang.Object], 0, 'foo', 'bar'
end.to raise_error(ArgumentError)
expect do
java.lang.System.java_send :getProperty, [java.lang.String], "foo", "bar"
end.to raise_error(ArgumentError)
end
end
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