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testLowerJavaSupport.rb
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testLowerJavaSupport.rb
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require 'test/minirunit'
require 'java'
test_check "Low-level Java Support"
if defined? Java
# test_equal(nil, TestHelper.getNull())
# Test casting:
# The instance o's actual class is private, but it's returned as a public
# interface, which should work.
# o = TestHelper.getInterfacedInstance()
# test_equal("stuff done", o.doStuff())
# o = TestHelper.getLooslyCastedInstance()
# test_equal("stuff done", o.doStuff())
# test_exception(NameError) { Java::JavaClass.new }
# inner_class = Java::JavaClass.for_name("org.jruby.test.TestHelper$SomeImplementation")
# test_equal("org.jruby.test.TestHelper$SomeImplementation", inner_class.name)
string_class = Java::JavaClass.for_name("java.lang.String")
test_equal(string_class, Java::JavaClass.for_name("java.lang.String"))
test_equal("java.lang.String", string_class.to_s)
test_equal(string_class.id, Java::JavaClass.for_name("java.lang.String").id)
test_exception(NameError) { Java::JavaClass.for_name("not.existing.Class") }
test_ok(string_class.public?)
test_ok(string_class.final?)
test_ok(! string_class.primitive?)
runnable_class = Java::JavaClass.for_name("java.lang.Runnable")
test_ok(! runnable_class.final?)
test_ok(runnable_class.interface?)
test_ok(! string_class.interface?)
test_ok(! string_class.array?)
inner_class = Java::JavaClass.for_name("java.lang.Character$Subset")
test_equal("java.lang.Character$Subset", inner_class.name)
#superclass
sql_date_class = Java::JavaClass.for_name("java.sql.Date")
object_class = string_class.superclass
test_equal("java.lang.Object", object_class.name)
test_equal(nil, object_class.superclass)
test_equal(Java::JavaClass.for_name('java.util.Date'), sql_date_class.superclass)
#interfaces
interfaces = string_class.interfaces.collect{|i| i.name()}
test_ok(interfaces.include?("java.lang.Comparable"))
test_ok(interfaces.include?("java.io.Serializable"))
test_ok(! interfaces.include?("java.lang.Object"))
test_ok(string_class < object_class)
test_ok(! (string_class > object_class))
test_ok(object_class > string_class)
test_ok(! (object_class < string_class))
test_ok(object_class == object_class)
test_ok(object_class != string_class)
string_methods = string_class.java_instance_methods
test_ok(string_methods.detect {|m| m.name == "charAt" })
test_ok(string_methods.detect {|m| m.name == "substring"})
test_ok(string_methods.detect {|m| m.name == "valueOf"}.nil?)
test_ok(string_methods.all? {|m| not m.static? })
string_class_methods = string_class.java_class_methods
test_ok(string_class_methods.detect {|m| m.name == "valueOf" })
test_ok(string_class_methods.all? {|m| m.static? })
# Instance variables
rectangle_class = Java::JavaClass.for_name("java.awt.Rectangle")
x_field = rectangle_class.field(:x)
y_field = rectangle_class.field(:y)
test_ok(rectangle_class.fields.include?(x_field))
test_ok(rectangle_class.fields.include?(y_field))
test_equal("int", x_field.value_type)
test_equal("x", x_field.name)
test_ok(x_field.public?)
test_ok(! x_field.static?)
test_ok(! x_field.final?)
integer_ten = Java.primitive_to_java(10)
integer_two = Java.primitive_to_java(2)
constructor = rectangle_class.constructor(:int, :int, :int, :int)
rectangle = constructor.new_instance(integer_two,
integer_ten,
integer_two,
integer_two)
value = x_field.value(rectangle)
test_equal("java.lang.Integer", value.java_type)
test_equal(2, Java.java_to_primitive(value))
x_field.set_value(rectangle, integer_ten)
value = x_field.value(rectangle)
test_equal("java.lang.Integer", value.java_type)
test_equal(10, Java.java_to_primitive(value))
test_exception(TypeError) {
x_field.set_value(rectangle, Java.primitive_to_java("hello"))
}
# private fields
TestHelper = JavaUtilities.get_proxy_class('org.jruby.test.TestHelper')
test_ok(TestHelper.java_class.declared_fields.find {|field| field.name == 'privateField' })
privateField = TestHelper.java_class.declared_field('privateField')
test_equal('privateField', privateField.name)
test_ok(! privateField.public?)
test_ok(! privateField.accessible?)
privateField.accessible = true
test_ok( privateField.accessible?)
#private constructors
cons = TestHelper.java_class.declared_constructors()
con_private = cons.find {|con| con.arity == 1}
test_ok(1,cons.length)
test_ok(['java.lang.String'], cons[0].argument_types.collect{|arg_type| arg_type.name})
test_ok(! con_private.public?)
test_ok(! con_private.accessible?)
con_private.accessible = true
test_ok(con_private.accessible?)
con = TestHelper.java_class.declared_constructor('java.lang.String')
test_ok(con_private,con)
#private instance methods
test_ok(TestHelper.java_class.declared_instance_methods.find {|method| method.name == 'privateMethod'})
privateMethod = TestHelper.java_class.declared_method('privateMethod')
test_equal('privateMethod', privateMethod.name)
test_ok( !privateMethod.accessible?)
privateMethod.accessible = true
test_ok( privateMethod.accessible?)
helper = con_private.new_instance(Java::primitive_to_java("X"))
test_equal('X', Java::java_to_primitive(privateMethod.invoke(helper)))
#private static methods
test_ok(TestHelper.java_class.declared_class_methods.find {|method| method.name == 'staticPrivateMethod'})
privateMethod = TestHelper.java_class.declared_method('staticPrivateMethod')
test_equal('staticPrivateMethod', privateMethod.name)
test_ok( !privateMethod.accessible?)
privateMethod.accessible = true
test_ok( privateMethod.accessible?)
test_equal("staticPM", Java::java_to_primitive(privateMethod.invoke_static()))
# Class variables
integer_class = Java::JavaClass.for_name("java.lang.Integer")
field = integer_class.field(:MAX_VALUE)
test_ok(integer_class.fields.include?(field))
test_ok(field.final?)
test_ok(field.static?)
test_equal(2147483647, Java.java_to_primitive(field.static_value))
method = string_class.java_method(:toString)
test_ok(method.kind_of?(Java::JavaMethod))
test_equal("toString", method.name)
test_equal(0, method.arity)
test_ok(method.public?)
method = string_class.java_method("equals", "java.lang.Object")
test_equal("equals", method.name)
test_equal(1, method.arity)
test_ok(! method.final?)
random_class = Java::JavaClass.for_name("java.util.Random")
method = random_class.java_method(:nextInt)
constructors = random_class.constructors
test_equal(2, constructors.length)
test_equal([0, 1], constructors.collect {|c| c.arity }.sort)
constructor = random_class.constructor(:long)
test_equal(1, constructor.arity)
random = constructor.new_instance(Java.primitive_to_java(2002))
result = method.invoke(random)
test_equal("java.lang.Integer", result.java_type)
result = Java.java_to_primitive(result)
test_ok(result.kind_of?(Fixnum))
# Converting primitives
java_string = random_class.java_method(:toString).invoke(random)
test_equal("java.lang.String", java_string.java_type)
test_ok(Java.java_to_primitive(java_string).kind_of?(String))
test_ok(Java.java_to_primitive(random).kind_of?(Java::JavaObject))
test_ok(Java.primitive_to_java(random) == random)
test_ok(Java.primitive_to_java("hello").kind_of?(Java::JavaObject))
test_equal("java.lang.String", Java.primitive_to_java("hello").java_type)
# TODO: We want to actually find out if it is kind_of? java.util.List
#test_equal("java.util.ArrayList", Java.primitive_to_java([1,2,3]).java_type)
# Putting and getting objects back
integer_zero = Java.primitive_to_java(0)
arraylist_class = Java::JavaClass.for_name("java.util.ArrayList")
list = arraylist_class.constructor().new_instance()
add_method = arraylist_class.java_method(:add, "java.lang.Object")
add_method.invoke(list, random)
returned_random = arraylist_class.java_method(:get, "int").invoke(list, integer_zero)
test_equal("java.util.Random", returned_random.java_type)
random_class.java_method(:nextInt).invoke(returned_random)
test_equal("java.lang.Long", Java.primitive_to_java(10).java_type)
method = random_class.java_method(:nextInt, "int")
test_equal(["int"], method.argument_types.collect{|arg_type| arg_type.name})
test_exception(TypeError) { method.invoke(random, 10) }
result = method.invoke(random, Java.primitive_to_java(10))
test_equal("java.lang.Integer", result.java_type)
method = string_class.java_method("valueOf", "int")
test_ok(method.static?)
result = method.invoke_static(Java.primitive_to_java(101))
test_equal(string_class.to_s, result.java_type)
# Control over return types and values
test_equal("java.lang.String", method.return_type.name)
test_equal(nil, string_class.java_method("notifyAll").return_type)
test_equal(Java::JavaObject,
method.invoke_static(Java.primitive_to_java(101)).class)
# Not arrays
test_exception(TypeError) { random[0] } # Not an array
test_exception(TypeError) { random.length } # Not an array
# Arrays
constructed_array = string_class.new_array(10)
test_equal(10, constructed_array.length)
string_array_class = Java::JavaClass.for_name(constructed_array.java_type)
test_ok(string_array_class.array?)
test_equal("[Ljava.lang.String;", string_array_class.name)
test_ok(string_array_class.constructors.empty?)
test_equal("java.lang.String", string_array_class.component_type.name)
test_ok(constructed_array[3].nil?)
test_exception(ArgumentError) { constructed_array[10] }
constructed_array[3] = Java.primitive_to_java("hello")
test_equal("hello", Java.java_to_primitive(constructed_array[3]))
test_ok(constructed_array[4].nil?)
list = arraylist_class.constructor().new_instance()
returned_array = arraylist_class.java_method(:toArray).invoke(list)
test_equal(0, returned_array.length)
# java.lang.reflect.Proxy
al = "java.awt.event.ActionListener"
ae = "java.awt.event.ActionEvent"
action_listener_class = Java::JavaClass.for_name(al)
action_listener_instance = Java.new_proxy_instance(action_listener_class) do
|proxy, method, event|
test_ok(action_listener_instance.java_class == proxy.java_class)
test_ok(method.instance_of?(Java::JavaMethod))
test_equal("actionPerformed", method.name())
$callback_invoked = true
end
test_ok(action_listener_instance.instance_of?(Java::JavaObject))
instance_class = action_listener_instance.java_class
proxy_class = Java::JavaClass.for_name("java.lang.reflect.Proxy")
test_ok(instance_class < action_listener_class)
test_ok(action_listener_instance.java_class < proxy_class)
action_performed = action_listener_class.java_method(:actionPerformed, ae)
$callback_invoked = false
action_performed.invoke(action_listener_instance, Java.primitive_to_java(nil))
test_ok($callback_invoked)
# Primitive Java types
int_class = Java::JavaClass.for_name("int")
test_ok(int_class.primitive?)
boolean_class = Java::JavaClass.for_name("boolean")
test_ok(boolean_class.primitive?)
test_ok(Java::JavaClass.for_name("char").primitive?)
# Assignability, non-primitives
object_class = Java::JavaClass.for_name("java.lang.Object")
test_ok(object_class.assignable_from?(string_class))
test_ok(! string_class.assignable_from?(object_class))
# test_ok(object_class.assignable_from?(nil.type))
# test_ok(string_class.assignable_from?(nil.type))
# Assignability, primitives
long_class = Java::JavaClass.for_name("long")
test_ok(int_class.assignable_from?(long_class))
test_ok(! int_class.assignable_from?(boolean_class))
character_class = Java::JavaClass.for_name("char")
test_ok(int_class.assignable_from?(character_class))
test_ok(character_class.assignable_from?(int_class))
# test_ok(! int_class.assignable_from?(nil.type))
# test_ok(! character_class.assignable_from?(nil.type))
end