oeqa/selftest/bbclasses: Add tests for systemd and update-rc.d interaction

These tests verify that the correct files are left behind when systemd
is inherited and depending on whether the systemd and/or sysvinit distro
features are enabled.

(From OE-Core rev: 4ef25caa00ad08046567d0e7f4523486c3a256d0)

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/recipes-test/bbclasses/systemd-and-sysvinit.bb

@@ -0,0 +1,17 @@
+LICENSE = "MIT"
+
+inherit allarch systemd update-rc.d
+
+do_install() {
+	install -d ${D}${systemd_system_unitdir}
+	touch ${D}${systemd_system_unitdir}/${BPN}.service
+
+	install -d ${D}${INIT_D_DIR}
+	touch ${D}${INIT_D_DIR}/${BPN}
+}
+
+INITSCRIPT_NAME = "${BPN}"
+
+SYSTEMD_SERVICE:${PN} = "${BPN}.service"
+
+EXCLUDE_FROM_WORLD="1"

meta-selftest/recipes-test/bbclasses/systemd-only.bb

@@ -0,0 +1,12 @@
+LICENSE = "MIT"
+
+inherit allarch systemd
+
+do_install() {
+	install -d ${D}${systemd_system_unitdir}
+	touch ${D}${systemd_system_unitdir}/${BPN}.service
+}
+
+SYSTEMD_SERVICE:${PN} = "${BPN}.service"
+
+EXCLUDE_FROM_WORLD="1"

meta/lib/oeqa/selftest/cases/bbclasses.py

@@ -0,0 +1,106 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import get_bb_vars, bitbake
+
+class Systemd(OESelftestTestCase):
+    """
+    Tests related to the systemd bbclass.
+    """
+
+    def getVars(self, recipe):
+        self.bb_vars = get_bb_vars(
+            [
+                'BPN',
+                'D',
+                'INIT_D_DIR',
+                'prefix',
+                'systemd_system_unitdir',
+                'sysconfdir',
+            ],
+            recipe,
+        )
+
+    def fileExists(self, filename):
+        self.assertExists(filename.format(**self.bb_vars))
+
+    def fileNotExists(self, filename):
+        self.assertNotExists(filename.format(**self.bb_vars))
+
+    def test_systemd_in_distro(self):
+        """
+        Summary:    Verify that no sysvinit files are installed when the
+                    systemd distro feature is enabled, but sysvinit is not.
+        Expected:   Systemd service file exists, but /etc does not.
+        Product:    OE-Core
+        Author:     Peter Kjellerstedt <peter.kjellerstedt@axis.com>
+        """
+
+        self.write_config("""
+DISTRO_FEATURES:append = " systemd usrmerge"
+DISTRO_FEATURES:remove = "sysvinit"
+VIRTUAL-RUNTIME_init_manager = "systemd"
+""")
+        bitbake("systemd-only systemd-and-sysvinit -c install")
+
+        self.getVars("systemd-only")
+        self.fileExists("{D}{systemd_system_unitdir}/{BPN}.service")
+
+        self.getVars("systemd-and-sysvinit")
+        self.fileExists("{D}{systemd_system_unitdir}/{BPN}.service")
+        self.fileNotExists("{D}{sysconfdir}")
+
+    def test_systemd_and_sysvinit_in_distro(self):
+        """
+        Summary:    Verify that both systemd and sysvinit files are installed
+                    when both the systemd and sysvinit distro features are
+                    enabled.
+        Expected:   Systemd service file and sysvinit initscript exist.
+        Product:    OE-Core
+        Author:     Peter Kjellerstedt <peter.kjellerstedt@axis.com>
+        """
+
+        self.write_config("""
+DISTRO_FEATURES:append = " systemd sysvinit usrmerge"
+VIRTUAL-RUNTIME_init_manager = "systemd"
+""")
+        bitbake("systemd-only systemd-and-sysvinit -c install")
+
+        self.getVars("systemd-only")
+        self.fileExists("{D}{systemd_system_unitdir}/{BPN}.service")
+
+        self.getVars("systemd-and-sysvinit")
+        self.fileExists("{D}{systemd_system_unitdir}/{BPN}.service")
+        self.fileExists("{D}{INIT_D_DIR}/{BPN}")
+
+    def test_sysvinit_in_distro(self):
+        """
+        Summary:    Verify that no systemd service files are installed when the
+                    sysvinit distro feature is enabled, but systemd is not.
+        Expected:   The systemd  service file does not exist, nor does /usr.
+                    The sysvinit initscript exists.
+        Product:    OE-Core
+        Author:     Peter Kjellerstedt <peter.kjellerstedt@axis.com>
+        """
+
+        self.write_config("""
+DISTRO_FEATURES:remove = "systemd"
+DISTRO_FEATURES:append = " sysvinit usrmerge"
+VIRTUAL-RUNTIME_init_manager = "sysvinit"
+""")
+        bitbake("systemd-only systemd-and-sysvinit -c install")
+
+        self.getVars("systemd-only")
+        self.fileNotExists("{D}{systemd_system_unitdir}/{BPN}.service")
+        self.fileNotExists("{D}{prefix}")
+        self.fileNotExists("{D}{sysconfdir}")
+        self.fileExists("{D}")
+
+        self.getVars("systemd-and-sysvinit")
+        self.fileNotExists("{D}{systemd_system_unitdir}/{BPN}.service")
+        self.fileNotExists("{D}{prefix}")
+        self.fileExists("{D}{INIT_D_DIR}/{BPN}")