Initial cut for a development server

test/test.sh

 #!/bin/bash
 set -e # bail on error
 
 function fail {
   echo -e "Some tests failed"
   return 1
 }
 
+# Arguments passed to the diff tool. We exclude runtime JS files that are just
+# copied over from the sources and are not duplicated in the expected folder.
+DIFF_ARGS="-u -r -N --exclude=dart_runtime.js \
+  --exclude=harmony_feature_check.js expect actual"
+
 function show_diff {
   echo "Fail: actual output did not match expected"
   echo
-  diff -u -r -N $1 $2 |\
+  diff $DIFF_ARGS |\
     sed -e "s/^\(+.*\)/\1/" |\
     sed -e "s/^\(-.*\)/\1/"
   echo
   echo "You can update these expectations with:"
   echo "$ pushd `pwd` && cp -a actual/* expect && popd"
   fail
 }
 
-# the directory of this script 
+# the directory of this script
 TEST_DIR=$( cd $( dirname "${BASH_SOURCE[0]}" ) && pwd )
 
 # Some tests require being run from the package root
 cd $TEST_DIR/..
 
 # Check minimum SDK version
 ./tool/sdk_version_check.dart 1.9.0-dev.4.0 || fail
 
 # Remove packages symlinks, and old codegen output
 find test/codegen -name packages -exec rm {} \;
 rm -r test/codegen/actual 2> /dev/null || true
 find test/dart_codegen -name packages -exec rm {} \;
 rm -r test/dart_codegen/actual 2> /dev/null || true
 dart -c test/all_tests.dart || fail
 
 # validate codegen_test output
 pushd test/codegen/ &> /dev/null
-diff -u -r -N expect actual > /dev/null || show_diff expect actual
+diff $DIFF_ARGS > /dev/null || show_diff
 popd &> /dev/null
 
 # validate dart_codegen_test output
 pushd test/dart_codegen/ &> /dev/null
-diff -u -r -N expect actual > /dev/null || show_diff expect actual
+diff $DIFF_ARGS > /dev/null || show_diff
 popd &> /dev/null
 
 # run self host and analyzer after other tests, because they're ~seconds to run.
 dart -c test/checker/self_host_test.dart || fail
 
 # Run analyzer on bin/devc.dart, as it includes most of the code we care about
 # via transitive dependencies. This seems to be the only fast way to avoid
 # repeated analysis of the same code.
 # TODO(jmesserly): ideally we could do test/all_tests.dart, but
 # dart_runtime_test.dart creates invalid generic type instantiation AA.
@@ skipping 13 matching lines @@
 #   * local files that have never been added to git,
 #   * subdirectories of test/ and tool/, unless explicitly added. Those dirs
 #     contain a lot of generated or external source we should not reformat.
 (files=`git ls-files 'bin/*.dart' 'lib/*.dart' test/*.dart test/checker/*.dart \
   tool/*.dart | grep -v lib/src/js/`; git status -s $files | grep -q . \
   && echo "Did not run the formatter, please commit edited files first." \
   || (echo "Running dart formatter" ; pub run dart_style:format -w $files))
 popd &> /dev/null
 
 echo -e "All tests pass"