Add ability to unit test by permissions.

tools/unit_tests.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+from util import run
+import sys
+
+
+# We want to test many ops in deno which have different behavior depending on
+# the permissions set. These tests can specify which permissions they expect,
+# which appends a special string like "permW1N0" to the end of the test name.
+# Here we run several copies of deno with different permissions, filtering the
+# tests by the special string. permW0N0 means allow-write but not allow-net.
+# See js/test_util.ts for more details.
+def unit_tests(deno_exe):
+    run([deno_exe, "js/unit_tests.ts", "permW0N0"])
+    run([deno_exe, "js/unit_tests.ts", "permW1N0", "--allow-write"])
+    run([deno_exe, "js/unit_tests.ts", "permW0N1", "--allow-net"])
+    run([
+        deno_exe, "js/unit_tests.ts", "permW1N1", "--allow-write",
+        "--allow-net"
+    ])
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print "Usage ./tools/unit_tests.py out/debug/deno"
+        sys.exit(1)
+    unit_tests(sys.argv[1])