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>

1 files changed, 47 insertions, 0 deletions

diff --git a/support/testing/tests/init/base.py b/support/testing/tests/init/base.py
new file mode 100644
index 0000000000..a261d7dd46
--- /dev/null
+++ b/support/testing/tests/init/base.py
@@ -0,0 +1,47 @@
+import os
+import subprocess
+import infra.basetest
+
+class InitSystemBase(infra.basetest.BRTest):
+
+    def startEmulator(self, fs_type, kernel=None, dtb=None, init=None):
+        img = os.path.join(self.builddir, "images", "rootfs.{}".format(fs_type))
+        subprocess.call(["truncate", "-s", "%1M", img])
+
+        options = ["-drive",
+                   "file={},if=sd,format=raw".format(img),
+                   "-M", "vexpress-a9"]
+
+        if kernel is None:
+            kernel = "builtin"
+        else:
+            kernel = os.path.join(self.builddir, "images", kernel)
+            options.extend(["-dtb", os.path.join(self.builddir, "images",
+                                             "{}.dtb".format(dtb))])
+
+        kernel_cmdline = ["root=/dev/mmcblk0",
+                          "rootfstype={}".format(fs_type),
+                          "rootwait",
+                          "ro",
+                          "console=ttyAMA0"]
+
+        if not init is None:
+            kernel_cmdline.extend(["init={}".format(init)])
+
+        self.emulator.boot(arch="armv7",
+                           kernel=kernel,
+                           kernel_cmdline=kernel_cmdline,
+                           options=options)
+
+        if init is None:
+            self.emulator.login()
+
+    def checkInit(self, path):
+        cmd = "cmp /proc/1/exe {}".format(path)
+        _, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, 0)
+
+    def checkNetwork(self, interface, exitCode=0):
+        cmd = "ip addr show {} |grep inet".format(interface)
+        _, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, exitCode)