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# frozen_string_literal: true
require "yarp_test_helper"
if RUBY_PLATFORM =~ /linux/
#
# examine a yarp dll or static archive for expected external symbols.
# these tests only work on a linux system right now.
#
class LibrarySymbolsTest < Test::Unit::TestCase
def setup
super
@librubyparser_a = File.expand_path(File.join(__dir__, "..", "build", "librubyparser.a"))
@librubyparser_so = File.expand_path(File.join(__dir__, "..", "build", "librubyparser.so"))
@yarp_so = File.expand_path(File.join(__dir__, "..", "lib", "yarp", "yarp.so"))
end
# objdump runner and helpers
def objdump(path)
assert_path_exist(path)
%x(objdump --section=.text --syms #{path}).split("\n")
end
def global_objdump_symbols(path)
objdump(path).select { |line| line[17] == "g" }
end
def hidden_global_objdump_symbols(path)
global_objdump_symbols(path).select { |line| line =~ / \.hidden / }
end
def visible_global_objdump_symbols(path)
global_objdump_symbols(path).reject { |line| line =~ / \.hidden / }
end
# nm runner and helpers
def nm(path)
assert_path_exist(path)
%x(nm #{path}).split("\n")
end
def global_nm_symbols(path)
nm(path).select { |line| line[17] == "T" }
end
def local_nm_symbols(path)
nm(path).select { |line| line[17] == "t" }
end
# dig the symbol name out of each line. works for both `objdump` and `nm` output.
def names(symbol_lines)
symbol_lines.map { |line| line.split(/\s+/).last }
end
#
# static archive - librubyparser.a
#
def test_librubyparser_a_contains_nothing_globally_visible
omit("librubyparser.a is not built") unless File.exist?(@librubyparser_a)
assert_empty(names(visible_global_objdump_symbols(@librubyparser_a)))
end
def test_librubyparser_a_contains_hidden_yp_symbols
omit("librubyparser.a is not built") unless File.exist?(@librubyparser_a)
names(hidden_global_objdump_symbols(@librubyparser_a)).tap do |symbols|
assert_includes(symbols, "yp_parse")
assert_includes(symbols, "yp_version")
end
end
#
# shared object - librubyparser.so
#
def test_librubyparser_so_exports_only_the_necessary_functions
omit("librubyparser.so is not built") unless File.exist?(@librubyparser_so)
names(global_nm_symbols(@librubyparser_so)).tap do |symbols|
assert_includes(symbols, "yp_parse")
assert_includes(symbols, "yp_version")
end
names(local_nm_symbols(@librubyparser_so)).tap do |symbols|
assert_includes(symbols, "yp_encoding_shift_jis_isupper_char")
end
# TODO: someone who uses this library needs to finish this test
end
#
# shared object - yarp.so
#
def test_yarp_so_exports_only_the_C_extension_init_function
omit("yarp.so is not built") unless File.exist?(@yarp_so)
names(global_nm_symbols(@yarp_so)).tap do |symbols|
assert_equal(["Init_yarp"], symbols)
end
end
end
end
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