1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
require 'java'
require 'test/unit'
class TestStringJavaBytes < Test::Unit::TestCase
def test_conversions
# this needed to be modified to clear up the ambiguity surrounding Java's
# byte being signed; you can only coerce values from -128..127 safely without
# Java seeing a different value than Ruby. Value can't be lost across the
# boundary.
all_byte_values = Array.new(256) {|i| i - 128}
java_bytes = all_byte_values.to_java(:byte)
string_from_bytes = String.from_java_bytes(java_bytes)
assert(string_from_bytes.instance_of?(String))
assert_equal(string_from_bytes.length, java_bytes.length)
# different sign for 0..127
0.upto(127) do |i|
assert_equal(all_byte_values[i] + 256, string_from_bytes[i])
end
# same sign for 128..255
128.upto(255) do |i|
assert_equal(all_byte_values[i], string_from_bytes[i])
end
bytes_from_string = string_from_bytes.to_java_bytes
assert(bytes_from_string.instance_of?(Java::byte[]))
assert_equal(bytes_from_string.length, string_from_bytes.length)
0.upto(255) do |i|
assert_equal(bytes_from_string[i], java_bytes[i])
end
end
def test_exceptions
assert_raises(TypeError) { String.from_java_bytes(Java::double[1].new) }
assert_raises(TypeError) { String.from_java_bytes(3.141) }
# must test underlying call for to_java_bytes
assert_raises(TypeError) { JavaArrayUtilities.ruby_string_to_bytes(3.141) }
assert_raises(TypeError) { JavaArrayUtilities.ruby_string_to_bytes( Object.new ) }
end
end
|
