test: make root tests easier to run

.github/workflows/tests.yml

@@ -43,16 +43,7 @@ jobs:
 
     - name: Test
       run: |
-        go test -c ./internals/daemon
-        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H ./daemon.test -check.v -check.f ^execSuite\.TestUserGroup$
-        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H ./daemon.test -check.v -check.f ^execSuite\.TestUserIDGroupID$
-        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H ./daemon.test -check.v -check.f ^filesSuite\.TestWriteUserGroupReal$
-        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H ./daemon.test -check.v -check.f ^filesSuite\.TestMakeDirsUserGroupReal$
-        go test -c ./internals/osutil
-        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H ./osutil.test -check.v -check.f ^mkdirSuite\.TestMakeParentsChmodAndChown$
-
-        go test -c ./internals/overlord/servstate/
-        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H ./servstate.test -check.v -check.f ^S.TestUserGroup$
+        PEBBLE_TEST_USER=runner PEBBLE_TEST_GROUP=runner sudo -E -H go test ./...
 
   format:
     runs-on: ubuntu-latest

internals/cli/cmd_add_test.go

@@ -100,6 +100,9 @@ services:
 			} else if path == triggerLayerPath {
 				c.Assert(err, check.ErrorMatches, "triggered")
 			} else if path == unreadableLayerPath {
+				if os.Getuid() == 0 {
+					c.Skip("requires running as non-root users")
+				}
 				c.Assert(os.IsPermission(err), check.Equals, true)
 			}
 		}

internals/daemon/api_exec_test.go

@@ -258,7 +258,6 @@ func (s *execSuite) TestCurrentUserGroup(c *C) {
 	c.Check(stderr, Equals, "")
 }
 
-// See .github/workflows/tests.yml for how to run this test as root.
 func (s *execSuite) TestUserGroup(c *C) {
 	if os.Getuid() != 0 {
 		c.Skip("requires running as root")
@@ -286,7 +285,6 @@ func (s *execSuite) TestUserGroup(c *C) {
 	c.Assert(err, ErrorMatches, `.*home directory.*does not exist`)
 }
 
-// See .github/workflows/tests.yml for how to run this test as root.
 func (s *execSuite) TestUserIDGroupID(c *C) {
 	if os.Getuid() != 0 {
 		c.Skip("requires running as root")

internals/daemon/api_files_test.go

@@ -531,7 +531,6 @@ func (s *filesSuite) testMakeDirsUserGroup(c *C, uid, gid int, user, group strin
 	return tmpDir
 }
 
-// See .github/workflows/tests.yml for how to run this test as root.
 func (s *filesSuite) TestMakeDirsUserGroupReal(c *C) {
 	if os.Getuid() != 0 {
 		c.Skip("requires running as root")
@@ -988,7 +987,6 @@ func (s *filesSuite) TestWriteUserGroupMocked(c *C) {
 	c.Check(mkdirCalls[1], Equals, mkdirArgs{tmpDir + "/nested2", 0o755, osutil.MkdirOptions{MakeParents: true, ExistOK: true, Chmod: true, Chown: true, UserID: 56, GroupID: 78}})
 }
 
-// See .github/workflows/tests.yml for how to run this test as root.
 func (s *filesSuite) TestWriteUserGroupReal(c *C) {
 	if os.Getuid() != 0 {
 		c.Skip("requires running as root")

internals/osutil/io_test.go

@@ -84,6 +84,9 @@ func (ts *AtomicWriteTestSuite) TestAtomicWriteFileSymlinkNoFollow(c *C) {
 	c.Assert(os.Chmod(rodir, 0500), IsNil)
 	defer os.Chmod(rodir, 0700)
 
+	if os.Getuid() == 0 {
+		c.Skip("requires running as non-root users")
+	}
 	err := osutil.AtomicWriteFile(p, []byte("hi"), 0600, 0)
 	c.Assert(err, NotNil)
 }

internals/osutil/mkdir_test.go

@@ -208,7 +208,6 @@ func (mkdirSuite) TestMakeParentsAndNoChmod(c *check.C) {
 	c.Assert(info.Mode().Perm(), check.Equals, os.FileMode(0o755))
 }
 
-// See .github/workflows/tests.yml for how to run this test as root.
 func (mkdirSuite) TestMakeParentsChmodAndChown(c *check.C) {
 	if os.Getuid() != 0 {
 		c.Skip("requires running as root")

internals/osutil/stat_test.go

@@ -109,6 +109,10 @@ func makeTestPathInDir(c *C, dir string, path string, mode os.FileMode) string {
 }
 
 func (s *StatTestSuite) TestIsWritableDir(c *C) {
+	if os.Getuid() == 0 {
+		c.Skip("requires running as non-root users")
+	}
+
 	for _, t := range []struct {
 		path       string
 		mode       os.FileMode
@@ -180,6 +184,9 @@ func (s *StatTestSuite) TestExistsIsDir(c *C) {
 		c.Check(err, IsNil, comm)
 	}
 
+	if os.Getuid() == 0 {
+		c.Skip("requires running as non-root users")
+	}
 	p := makeTestPath(c, "foo/bar", 0)
 	c.Assert(os.Chmod(filepath.Dir(p), 0), IsNil)
 	defer os.Chmod(filepath.Dir(p), 0755)

internals/overlord/servstate/manager_test.go

@@ -532,7 +532,6 @@ func (s *S) TestUserGroupFails(c *C) {
 	c.Check(gotGid, Equals, uint32(gid))
 }
 
-// See .github/workflows/tests.yml for how to run this test as root.
 func (s *S) TestUserGroup(c *C) {
 	s.newServiceManager(c)
 	s.planAddLayer(c, testPlanLayer)