func (s *mountSuite) TestIsMountedNotThereErr(c *C) {
restore := osutil.MockMountInfoPath("/no/such/file")
defer restore()
_, err := osutil.IsMounted("/snap/ubuntu-core/855")
c.Check(err, ErrorMatches, "open /no/such/file: no such file or directory")
}
func (s *mountSuite) TestIsMountedHappyish(c *C) {
mockMountInfoFn := filepath.Join(c.MkDir(), "mountinfo")
restore := osutil.MockMountInfoPath(mockMountInfoFn)
defer restore()
// note the different optinal fields
content := []byte(`
44 24 7:1 / /snap/ubuntu-core/855 rw,relatime shared:27 - squashfs /dev/loop1 ro
44 24 7:1 / /snap/something/123 rw,relatime - squashfs /dev/loop2 ro
44 24 7:1 / /snap/random/456 rw,relatime opt:1 shared:27 - squashfs /dev/loop1 ro
`)
err := ioutil.WriteFile(mockMountInfoFn, content, 0644)
c.Assert(err, IsNil)
mounted, err := osutil.IsMounted("/snap/ubuntu-core/855")
c.Check(err, IsNil)
c.Check(mounted, Equals, true)
mounted, err = osutil.IsMounted("/snap/something/123")
c.Check(err, IsNil)
c.Check(mounted, Equals, true)
mounted, err = osutil.IsMounted("/snap/random/456")
c.Check(err, IsNil)
c.Check(mounted, Equals, true)
mounted, err = osutil.IsMounted("/random/made/up/name")
c.Check(err, IsNil)
c.Check(mounted, Equals, false)
}
func (s *mountSuite) TestIsMountedIncorrectLines(c *C) {
mockMountInfoFn := filepath.Join(c.MkDir(), "mountinfo")
restore := osutil.MockMountInfoPath(mockMountInfoFn)
defer restore()
content := []byte(`
invalid line
`)
err := ioutil.WriteFile(mockMountInfoFn, content, 0644)
c.Assert(err, IsNil)
_, err = osutil.IsMounted("/snap/ubuntu-core/855")
c.Check(err, ErrorMatches, `unexpected mountinfo line: "invalid line"`)
}