tests: Add initial hyperkit tun test

This uses 'expect' instead of 'grep' because hyperkit is
a bit finicky with re-directing the output (it expects a
tty). 'expect' handles this and is installed on macOS by
default.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

test/cases/010_platforms/010_hyperkit/000_run_kernel/test.exp

@@ -0,0 +1,31 @@
+#!/usr/bin/env expect
+spawn linuxkit run hyperkit hyperkit-kernel
+set pid [exp_pid]
+set timeout 30
+
+expect {
+    timeout {
+        puts "FAILED boot"
+        exec kill -9 $pid
+        exit 1
+    }
+    "Welcome to LinuxKit" {
+        puts "SUCCESS boot"
+    }
+}
+expect {
+    timeout {
+        puts "FAILED poweroff"
+        exec kill -9 $pid
+        exit 1
+    }
+    "Power down" {
+        puts "SUCCESS poweroff"
+    }
+    eof {
+        puts "SUCCESS poweroff"
+    }
+}
+set waitval [wait -i $spawn_id]
+set exval [lindex $waitval 3]
+exit $exval

test/cases/010_platforms/010_hyperkit/000_run_kernel/test.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+# SUMMARY: Check that the kernel+initrd image boots on hyperkit
+# LABELS:
+# AUTHOR: Rolf Neugebauer <rolf.neugebauer@docker.com>
+
+set -e
+set -x
+
+# Source libraries. Uncomment if needed/defined
+#. "${RT_LIB}"
+. "${RT_PROJECT_ROOT}/_lib/lib.sh"
+
+NAME=hyperkit-kernel
+
+clean_up() {
+	echo $(pwd)
+	# remove any files, containers, images etc
+	rm -rf "${NAME}"* || true
+}
+trap clean_up EXIT
+
+moby build -name "${NAME}" test.yml
+[ -f "${NAME}-kernel" ] || exit 1
+[ -f "${NAME}-initrd.img" ] || exit 1
+[ -f "${NAME}-cmdline" ]|| exit 1
+./test.exp
+exit 0

test/cases/010_platforms/010_hyperkit/000_run_kernel/test.yml

@@ -0,0 +1,16 @@
+kernel:
+  image: "linuxkit/kernel:4.9.x"
+  cmdline: "console=ttyS0 console=tty0 page_poison=1"
+init:
+  - linuxkit/init:f71c3b30ac1ba4ef16c160c89610fa4976f9752f
+  - linuxkit/runc:b0fb122e10dbb7e4e45115177a61a3f8d68c19a9
+  - linuxkit/containerd:60e2486a74c665ba4df57e561729aec20758daed
+onboot:
+  - name: poweroff
+    image: "linuxkit/poweroff:a8f1e4ad8d459f1fdaad9e4b007512cb3b504ae8"
+    command: ["/bin/sh", "/poweroff.sh", "10"]
+trust:
+  image:
+    - linuxkit/kernel
+outputs:
+  - format: kernel+initrd