Strict check of pagination in listsnapshot() test code when pagination is an optional value in the spec.

[humblec]

  // A token to specify where to start paginating. Set this field to
  // `next_token` returned by a previous `ListSnapshots` call to get the
  // next page of entries. This field is OPTIONAL.
  // An empty string is equal to an unspecified field value.
  string starting_token = 2;

  // Identity information for the source volume. This field is OPTIONAL.
  // It can be used to list snapshots by volume.
  string source_volume_id = 3;

The pagination is an optional param in CSI spec, however CSI tests are failing if driver dont implement support for pagination.

For ex:

[Fail] ListSnapshots [Controller Server] [It] should return next token when a limited number of entries are requested
/../src/github.com/gluster/gluster-csi-driver/vendor/github.com/kubernetes-csi/csi-test/pkg/sanity/controller.go:1352

Expected result: The test should not fail if CSI driver dont have capabilities to support pagination.

[humblec]

/assign @lpabon

[wackxu]

I will help fix it

[humblec]

@wackxu Thanks , please share if you have a PR.

[pohly]

@wackxu are you still working on this?

[msau42]

/help

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[Akrog]

The field is optional and so is the support of listing snapshots, but the token support is not optional for drivers that report the LIST_SNAPSHOTS capability. So any driver that supports listing must also support pagination.

The field is optional because you may not care about pagination and want everything returned in one call. But even if you want pagination, it cannot be present on the first request, since you don't have a value yet.

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[msau42]

/reopen
/lifecycle frozen

[k8s-ci-robot]

@msau42: Reopened this issue.

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/reopen
/lifecycle frozen

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