New CMDTEST_*.rb files testing "cmdtest" itself.

These files will replaces the old tests.

t/selftest_utils.rb

@@ -0,0 +1,46 @@
+
+
+module SelftestUtils
+
+  TOP = Dir.pwd
+  BIN = File.join(TOP, "t/bin")
+
+  if RUBY_PLATFORM =~ /mswin/
+    PLATFORM_BIN = File.join(TOP, "t/bin/windows")
+  else
+    PLATFORM_BIN = File.join(TOP, "t/bin/unix")
+  end
+
+  def setup
+    ignore_file ".cmdtest-filter"
+    ignore_file "tmp-cmdtest-2/"
+    ignore_file "tmp-cmdtest-2/TIMESTAMP"
+    ignore_file "tmp-cmdtest-2/tmp-command.sh"
+    ignore_file "tmp-cmdtest-2/tmp-stderr.log"
+    ignore_file "tmp-cmdtest-2/tmp-stdout.log"
+    ignore_file "tmp-cmdtest-2/workdir/"
+  end
+
+  def create_CMDTEST_foo(lines)
+    create_file "CMDTEST_foo.rb", [
+      "class CMDTEST_foo < Cmdtest::Testcase",
+      "  def setup",
+      "    prepend_path #{BIN.inspect}",
+      "    prepend_path #{PLATFORM_BIN.inspect}",
+      "  end",
+      "",
+      "  def test_foo",
+      lines,
+      "  end",
+      "end",
+    ]
+  end
+
+  def cmd_cmdtest(*args)
+    cmd("ruby #{TOP}/bin/cmdtest.rb --quiet", *args) do
+      comment "running local cmdtest"
+      yield
+    end
+  end
+
+end