support/testing: add s6 tests

Test that directory scanning and supervision is working.

Signed-off-by: Dick Olsson <hi@senzilla.io>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Arnout: properly indent, and use textwrap to dedent again.]

support/testing/tests/package/test_s6.py

@@ -0,0 +1,58 @@
+import os
+import textwrap
+
+import infra.basetest
+
+
+class TestS6(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_S6=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        img = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv5",
+                           kernel="builtin",
+                           options=["-initrd", img])
+        self.emulator.login()
+
+        _, exit_code = self.emulator.run("s6-svscan -h")
+        self.assertEqual(exit_code, 100)
+
+        script = \
+            """
+            #!/bin/execlineb -P
+            s6-ipcserver-socketbinder /tmp/socket
+            s6-ipcserverd
+            cat
+            """
+        script = textwrap.dedent(script)
+
+        # Set up scanning and service directories
+        self.emulator.run("mkdir -p source/testsv")
+        self.emulator.run("cat > source/testsv/run <<EOF" + script + "EOF")
+        self.emulator.run("chmod +x source/testsv/run")
+        _, exit_code = self.emulator.run("s6-svok source/testsv")
+        self.assertEqual(exit_code, 1)
+
+        # Run a scan and start all services
+        self.emulator.run("s6-svscan source &")
+        self.emulator.run("sleep 2")
+        _, exit_code = self.emulator.run("s6-svok source/testsv")
+        self.assertEqual(exit_code, 0)
+
+        # Test a running service
+        cmd = "echo foobar | s6-ipcclient /tmp/socket s6-ioconnect -67"
+        output, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, 0)
+        self.assertEqual(output[0], "foobar")
+
+        # Terminate all services
+        _, exit_code = self.emulator.run("s6-svscanctl -t source")
+        self.assertEqual(exit_code, 0)
+        self.emulator.run("sleep 2")
+        _, exit_code = self.emulator.run("s6-svok source/testsv")
+        self.assertEqual(exit_code, 1)