support/testing: add runtime testing for init systems

The "builtin" kernel does not boot a systemd-based system, so
we resort to building the same one as currently used by our
qemu_arm_vexpress_defconfig.

We test the 8 following combinations:

  - busybox, read-only, without network
  - busybox, read-only, with network
  - busybox, read-write, without network
  - busybox, read-write, with network

  - basic systemd, read-write, network w/ ifupdown
  - basic systemd, read-write, network w/ networkd
  - full systemd, read-write, network w/ networkd

  - no init system, read-only, without network

The tests just verify what the /sbin/init binary is, and that we were
able to grab an IP address. More tests can be added later, for example
to check each systemd features (journal, tmpfiles...)

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
[Arnout: update .gitlab-ci.yml]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/testing/tests/init/test_systemd.py

@@ -0,0 +1,82 @@
+import infra.basetest
+from tests.init.base import InitSystemBase as InitSystemBase
+
+class InitSystemSystemdBase(InitSystemBase):
+    config = \
+        """
+        BR2_arm=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_INIT_SYSTEMD=y
+        BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+        BR2_LINUX_KERNEL=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.11.3"
+        BR2_LINUX_KERNEL_DEFCONFIG="vexpress"
+        BR2_LINUX_KERNEL_DTS_SUPPORT=y
+        BR2_LINUX_KERNEL_INTREE_DTS_NAME="vexpress-v2p-ca9"
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def checkInit(self):
+        super(InitSystemSystemdBase, self).checkInit("/lib/systemd/systemd")
+
+
+#-------------------------------------------------------------------------------
+class TestInitSystemSystemdRwNetworkd(InitSystemSystemdBase):
+    config = InitSystemSystemdBase.config + \
+        """
+        BR2_SYSTEM_DHCP="eth0"
+        BR2_TARGET_ROOTFS_EXT2=y
+        """
+
+    def test_run(self):
+        self.startEmulator("ext2", "zImage", "vexpress-v2p-ca9")
+        self.checkInit()
+        self.checkNetwork("eth0")
+
+
+#-------------------------------------------------------------------------------
+class TestInitSystemSystemdRwIfupdown(InitSystemSystemdBase):
+    config = InitSystemSystemdBase.config + \
+        """
+        BR2_SYSTEM_DHCP="eth0"
+        # BR2_PACKAGE_SYSTEMD_NETWORKD is not set
+        # BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set
+        BR2_TARGET_ROOTFS_EXT2=y
+        """
+
+    def test_run(self):
+        self.startEmulator("ext2", "zImage", "vexpress-v2p-ca9")
+        self.checkInit()
+        self.checkNetwork("eth0")
+
+
+#-------------------------------------------------------------------------------
+class TestInitSystemSystemdRwFull(InitSystemSystemdBase):
+    config = InitSystemSystemdBase.config + \
+        """
+        BR2_SYSTEM_DHCP="eth0"
+        BR2_PACKAGE_SYSTEMD_JOURNAL_GATEWAY=y
+        BR2_PACKAGE_SYSTEMD_BACKLIGHT=y
+        BR2_PACKAGE_SYSTEMD_BINFMT=y
+        BR2_PACKAGE_SYSTEMD_COREDUMP=y
+        BR2_PACKAGE_SYSTEMD_FIRSTBOOT=y
+        BR2_PACKAGE_SYSTEMD_HIBERNATE=y
+        BR2_PACKAGE_SYSTEMD_IMPORTD=y
+        BR2_PACKAGE_SYSTEMD_LOCALED=y
+        BR2_PACKAGE_SYSTEMD_LOGIND=y
+        BR2_PACKAGE_SYSTEMD_MACHINED=y
+        BR2_PACKAGE_SYSTEMD_POLKIT=y
+        BR2_PACKAGE_SYSTEMD_QUOTACHECK=y
+        BR2_PACKAGE_SYSTEMD_RANDOMSEED=y
+        BR2_PACKAGE_SYSTEMD_RFKILL=y
+        BR2_PACKAGE_SYSTEMD_SMACK_SUPPORT=y
+        BR2_PACKAGE_SYSTEMD_SYSUSERS=y
+        BR2_PACKAGE_SYSTEMD_VCONSOLE=y
+        BR2_TARGET_ROOTFS_EXT2=y
+        """
+
+    def test_run(self):
+        self.startEmulator("ext2", "zImage", "vexpress-v2p-ca9")
+        self.checkInit()
+        self.checkNetwork("eth0")