Add repl (#998)

- Running repl from js side.
- Add tests for repl behavior.
- Handle ctrl-C and ctrl-D.

tools/test.py

@@ -11,6 +11,7 @@ from util import build_path, enable_ansi_colors, executable_suffix, run, rmtree
 from unit_tests import unit_tests
 from util_test import util_test
 from benchmark_test import benchmark_test
+from repl_test import repl_tests
 import subprocess
 import http_server
 
@@ -67,6 +68,8 @@ def main(argv):
         from permission_prompt_test import permission_prompt_test
         permission_prompt_test(deno_exe)
 
+    repl_tests(deno_exe)
+
     rmtree(deno_dir)
 
     deno_dir_test(deno_exe, deno_dir)