change test framework to use files for in and out (s-exp)

test/test_all.rb

@@ -1,2 +1,32 @@
-require_relative "unit/test_all"
-require_relative "roots/test_all"
+require_relative "setup"
+require "parslet/convenience"
+require "ast/sexp"
+
+class TestAll <  MiniTest::Test
+  include AST::Sexp
+
+  def check_file file
+    inn , out = File.new(file).read.split("-- -- --")
+    sexp = eval(out)
+    syntax    = Parser::Salama.new.parse_with_debug(inn)
+    result = Parser::Transform.new.apply(syntax)
+    assert_equal sexp ,  result
+  end
+  # this creates test methods dynamically. For each test_* method we create
+  # three test_*[ast/parse/transf] methods that in turn check the three phases.
+  # runnable_methods is called by minitest to determine which tests to run
+  def self.runnable_methods
+    puts "called"
+    all = Dir["test/cases/*/*.tst"]
+    puts "case #{all.length}"
+    tests =[]
+    all.each do |file|
+      name = file.sub("test/cases/","").sub("/","_").sub(".tst","")
+      tests << name
+      self.send(:define_method, name ) do
+        send("check_file" , file)
+      end
+    end
+    tests
+  end
+end