const f = Fossil.createContext()
var c = f.loadBlob('trunk')
assert 'buffer' === typename c
assert [c.length] > 0
// print(c)
assert catch {f.loadBlob('xyzyz')} inherits api.Exception
c = f.loadBlob(1)
assert 'buffer' === typename c
const diffOpt = object {
text: true,
//sbsWidth: 40,
//html: true,
inline: true
}
c = f.artifactDiff('prev', 'current', diffOpt) // will diff the manifests, not their contents
assert c inherits api.prototypes.Buffer
assert 'buffer' === typename c
assert c.length() > 0