When reference.Parse returns a digest only ref?

[liubog2008]

I cannot see the test case in https://github.com/distribution/reference/blob/v0.6.0/reference_test.go#L14

It seems all are Named.

[milosgajdos]

Parse() returns Reference. Reference is an interface type whose underlying type may or may not have a digest based on the regexp match: https://github.com/distribution/reference/blob/ff14fafe2236e51c2894ac07d4bdfc778e96d682/reference.go#L217-L223

The underlying type returned by Parse is reference https://github.com/distribution/reference/blob/ff14fafe2236e51c2894ac07d4bdfc778e96d682/reference.go#L356

The reference type implements Canonical interface so you will need to do a type assertion on it to check whether it implements Canonical interface which has a Digest method: https://github.com/distribution/reference/blob/ff14fafe2236e51c2894ac07d4bdfc778e96d682/reference.go#L142

[liubog2008]

If the ref implements the Canonical, it also implements the Named.

[liubog2008]

https://github.com/distribution/reference/blob/ff14fafe2236e51c2894ac07d4bdfc778e96d682/reference.go#L330-L336

It seems that Parse accepts a digest only ref, but I don't know what it looks like.

[milosgajdos]

Let's circle back.

Can you please explain what it is you are trying to achieve? Provide some code if possible. It's hard to explain things when there is no clear question.

[liubog2008]

I use the Parse to parse my ref, but cannot cover all cases in UT. I just want to know a valid input which may output a unnamed Reference