1 files changed, 104 insertions, 0 deletions
diff --git a/test/racc/helper.rb b/test/racc/helper.rb
new file mode 100644
index 0000000000..6e990f5b4c
--- /dev/null
+++ b/test/racc/helper.rb
@@ -0,0 +1,104 @@
+$VERBOSE = true
+require 'minitest/autorun'
+require 'racc/static'
+require 'fileutils'
+require 'tempfile'
+require 'timeout'
+
+module Racc
+  class TestCase < MiniTest::Unit::TestCase
+    PROJECT_DIR = File.expand_path(File.join(File.dirname(__FILE__), '..'))
+
+    TEST_DIR = File.join(PROJECT_DIR, 'test')
+
+    RACC      = File.join(PROJECT_DIR, 'bin', 'racc')
+    OUT_DIR   = File.join(TEST_DIR, 'out')
+    TAB_DIR   = File.join(TEST_DIR, 'tab') # generated parsers go here
+    LOG_DIR   = File.join(TEST_DIR, 'log')
+    ERR_DIR   = File.join(TEST_DIR, 'err')
+    ASSET_DIR = File.join(TEST_DIR, 'assets') # test grammars
+    REGRESS_DIR  = File.join(TEST_DIR, 'regress') # known-good generated outputs
+
+    INC = [
+      File.join(PROJECT_DIR, 'lib'),
+      File.join(PROJECT_DIR, 'ext'),
+    ].join(':')
+
+    def setup
+      [OUT_DIR, TAB_DIR, LOG_DIR, ERR_DIR].each do |dir|
+        FileUtils.mkdir_p(dir)
+      end
+    end
+
+    def teardown
+      [OUT_DIR, TAB_DIR, LOG_DIR, ERR_DIR].each do |dir|
+        FileUtils.rm_rf(dir)
+      end
+    end
+
+    def assert_compile(asset, args = [])
+      file = File.basename(asset, '.y')
+      args = ([args].flatten) + [
+        "#{ASSET_DIR}/#{file}.y",
+        '-Do',
+        "-O#{OUT_DIR}/#{file}",
+        "-o#{TAB_DIR}/#{file}",
+      ]
+      racc "#{args.join(' ')}"
+    end
+
+    def assert_debugfile(asset, ok)
+      file = File.basename(asset, '.y')
+      Dir.chdir(TEST_DIR) do
+        File.foreach("log/#{file}.y") do |line|
+          line.strip!
+          case line
+          when /sr/ then assert_equal "sr#{ok[0]}", line
+          when /rr/ then assert_equal "rr#{ok[1]}", line
+          when /un/ then assert_equal "un#{ok[2]}", line
+          when /ur/ then assert_equal "ur#{ok[3]}", line
+          when /ex/ then assert_equal "ex#{ok[4]}", line
+          else
+            raise TestFailed, 'racc outputs unknown debug report???'
+          end
+        end
+      end
+    end
+
+    def assert_exec(asset)
+      file = File.basename(asset, '.y')
+      Dir.chdir(TEST_DIR) do
+        ruby("#{TAB_DIR}/#{file}")
+      end
+    end
+
+    def strip_version(source)
+      source.sub(/This file is automatically generated by Racc \d+\.\d+\.\d+/, '')
+    end
+
+    def assert_output_unchanged(asset)
+      file = File.basename(asset, '.y')
+
+      expected = File.read("#{REGRESS_DIR}/#{file}")
+      actual   = File.read("#{TAB_DIR}/#{file}")
+      result   = (strip_version(expected) == strip_version(actual))
+
+      assert(result, "Output of test/assets/#{file}.y differed from " \
+        "expectation. Try compiling it and diff with test/regress/#{file}.")
+    end
+
+    def racc(arg)
+      ruby "-S #{RACC} #{arg}"
+    end
+
+    def ruby(arg)
+      Dir.chdir(TEST_DIR) do
+        Tempfile.open 'test' do |io|
+          cmd = "#{ENV['_'] || Gem.ruby} -I #{INC} #{arg} 2>#{io.path}"
+          result = system(cmd)
+          assert(result, io.read)
+        end
+      end
+    end
+  end
+end