add small sharness test to make sure output happens

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

test/sharness/t0151-sysdiag.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Copyright (c) 2015 Jeromy Johnson
+# MIT Licensed; see the LICENSE file in this repository.
+#
+
+test_description="test output of sysdiag command"
+
+. lib/test-lib.sh
+
+test_init_ipfs
+
+test_expect_success "ipfs diag sys succeeds" '
+	ipfs diag sys > output
+'
+
+test_expect_success "output contains some expected keys" '
+	grep "virt" output &&
+	grep "interface_addresses" output &&
+	grep "arch" output
+'
+
+test_done