func (s *imageSuite) TestDownloadUnpackGadget(c *C) {
files := [][]string{
{"subdir/canary.txt", "I'm a canary"},
}
s.downloadedSnaps["pc"] = snaptest.MakeTestSnapWithFiles(c, packageGadget, files)
s.storeSnapInfo["pc"] = infoFromSnapYaml(c, packageGadget, snap.R(99))
gadgetUnpackDir := filepath.Join(c.MkDir(), "gadget-unpack-dir")
opts := &image.Options{
GadgetUnpackDir: gadgetUnpackDir,
}
local, err := image.LocalSnaps(opts)
c.Assert(err, IsNil)
err = image.DownloadUnpackGadget(s, s.model, opts, local)
c.Assert(err, IsNil)
// verify the right data got unpacked
for _, t := range []struct{ file, content string }{
{"meta/snap.yaml", packageGadget},
{files[0][0], files[0][1]},
} {
fn := filepath.Join(gadgetUnpackDir, t.file)
content, err := ioutil.ReadFile(fn)
c.Assert(err, IsNil)
c.Check(content, DeepEquals, []byte(t.content))
}
}
func (s *imageSuite) TestMissingGadgetUnpackDir(c *C) {
err := image.DownloadUnpackGadget(s, s.model, &image.Options{}, nil)
c.Assert(err, ErrorMatches, `cannot create gadget unpack dir "": mkdir : no such file or directory`)
}