1 files changed, 163 insertions, 0 deletions
diff --git a/spec/ruby/library/rbconfig/rbconfig_spec.rb b/spec/ruby/library/rbconfig/rbconfig_spec.rb
new file mode 100644
index 0000000000..4195128a05
--- /dev/null
+++ b/spec/ruby/library/rbconfig/rbconfig_spec.rb
@@ -0,0 +1,163 @@
+require_relative '../../spec_helper'
+require 'rbconfig'
+
+describe 'RbConfig::CONFIG' do
+  it 'values are all strings' do
+    RbConfig::CONFIG.each do |k, v|
+      k.should.is_a? String
+      v.should.is_a? String
+    end
+  end
+
+  it 'has MAJOR, MINOR, TEENY, and PATCHLEVEL matching RUBY_VERSION and RUBY_PATCHLEVEL' do
+    major, minor, teeny = RUBY_VERSION.split('.')
+    RbConfig::CONFIG.values_at("MAJOR", "MINOR", "TEENY", "PATCHLEVEL").should == [
+      major, minor, teeny, RUBY_PATCHLEVEL.to_s
+    ]
+  end
+
+  # These directories have no meanings before the installation.
+  guard -> { RbConfig::TOPDIR } do
+    it "['rubylibdir'] returns the directory containing Ruby standard libraries" do
+      rubylibdir = RbConfig::CONFIG['rubylibdir']
+      File.directory?(rubylibdir).should == true
+      File.should.exist?("#{rubylibdir}/fileutils.rb")
+    end
+
+    it "['archdir'] returns the directory containing standard libraries C extensions" do
+      archdir = RbConfig::CONFIG['archdir']
+      File.directory?(archdir).should == true
+      File.should.exist?("#{archdir}/etc.#{RbConfig::CONFIG['DLEXT']}")
+    end
+
+    it "['sitelibdir'] is set and is part of $LOAD_PATH" do
+      sitelibdir = RbConfig::CONFIG['sitelibdir']
+      sitelibdir.should.is_a? String
+      $LOAD_PATH.map{|path| File.realpath(path) rescue path }.should.include? sitelibdir
+    end
+  end
+
+  it "contains no frozen strings even with --enable-frozen-string-literal" do
+    ruby_exe(<<-RUBY, options: '--enable-frozen-string-literal').should == "Done\n"
+      require 'rbconfig'
+      RbConfig::CONFIG.each do |k, v|
+        if v.frozen?
+          puts "\#{k} Failure"
+        end
+      end
+      puts 'Done'
+    RUBY
+  end
+
+  platform_is_not :windows do
+    it "['LIBRUBY'] is the same as LIBRUBY_SO if and only if ENABLE_SHARED" do
+      case RbConfig::CONFIG['ENABLE_SHARED']
+      when 'yes'
+        RbConfig::CONFIG['LIBRUBY'].should == RbConfig::CONFIG['LIBRUBY_SO']
+      when 'no'
+        RbConfig::CONFIG['LIBRUBY'].should_not == RbConfig::CONFIG['LIBRUBY_SO']
+      end
+    end
+  end
+
+  guard -> { RbConfig::TOPDIR } do
+    it "libdir/LIBRUBY_SO is the path to libruby and it exists if and only if ENABLE_SHARED" do
+      libdirname = RbConfig::CONFIG['LIBPATHENV'] == 'PATH' ? 'bindir' :
+                     RbConfig::CONFIG['libdirname']
+      libdir = RbConfig::CONFIG[libdirname]
+      libruby_so = "#{libdir}/#{RbConfig::CONFIG['LIBRUBY_SO']}"
+      case RbConfig::CONFIG['ENABLE_SHARED']
+      when 'yes'
+        File.should.exist?(libruby_so)
+      when 'no'
+        File.should_not.exist?(libruby_so)
+      end
+    end
+  end
+
+  platform_is :linux do
+    it "['AR'] exists and can be executed" do
+      ar = RbConfig::CONFIG.fetch('AR')
+      out = `#{ar} --version`
+      $?.should.success?
+      out.should_not.empty?
+    end
+
+    it "['STRIP'] exists and can be executed" do
+      strip = RbConfig::CONFIG.fetch('STRIP')
+      copy = tmp("sh")
+      cp '/bin/sh', copy
+      begin
+        out = `#{strip} #{copy}`
+        $?.should.success?
+      ensure
+        rm_r copy
+      end
+    end
+  end
+
+  guard -> { %w[aarch64 arm64].include? RbConfig::CONFIG['host_cpu'] } do
+    it "['host_cpu'] returns CPU architecture properly for AArch64" do
+      platform_is :darwin do
+        RbConfig::CONFIG['host_cpu'].should == 'arm64'
+      end
+
+      platform_is_not :darwin do
+        RbConfig::CONFIG['host_cpu'].should == 'aarch64'
+      end
+    end
+  end
+
+  guard -> { platform_is(:linux) || platform_is(:darwin) } do
+    it "['host_os'] returns a proper OS name or platform" do
+      platform_is :darwin do
+        RbConfig::CONFIG['host_os'].should.match?(/darwin/)
+      end
+
+      platform_is :linux do
+        RbConfig::CONFIG['host_os'].should.match?(/linux/)
+      end
+    end
+  end
+end
+
+describe "RbConfig::TOPDIR" do
+  it "either returns nil (if not installed) or the prefix" do
+    if RbConfig::TOPDIR
+      RbConfig::TOPDIR.should == RbConfig::CONFIG["prefix"]
+    else
+      RbConfig::TOPDIR.should == nil
+    end
+  end
+end
+
+describe "RUBY_PLATFORM" do
+  it "RUBY_PLATFORM contains a proper CPU architecture" do
+    RUBY_PLATFORM.should.include? RbConfig::CONFIG['host_cpu']
+  end
+
+  guard -> { platform_is(:linux) || platform_is(:darwin) } do
+    it "RUBY_PLATFORM contains OS name" do
+      # don't use RbConfig::CONFIG['host_os'] as far as it could be slightly different, e.g. linux-gnu
+      platform_is(:linux) do
+        RUBY_PLATFORM.should.include? 'linux'
+      end
+
+      platform_is(:darwin) do
+        RUBY_PLATFORM.should.include? 'darwin'
+      end
+    end
+  end
+end
+
+describe "RUBY_DESCRIPTION" do
+  guard_not -> { RUBY_ENGINE == "ruby" && !RbConfig::TOPDIR } do
+    it "contains version" do
+      RUBY_DESCRIPTION.should.include? RUBY_VERSION
+    end
+
+    it "contains RUBY_PLATFORM" do
+      RUBY_DESCRIPTION.should.include? RUBY_PLATFORM
+    end
+  end
+end