distribution/docs/storage/catalog_test.go

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package storage
import (
"io"
"testing"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/registry/storage/cache/memory"
"github.com/docker/distribution/registry/storage/driver"
"github.com/docker/distribution/registry/storage/driver/inmemory"
)
type setupEnv struct {
ctx context.Context
driver driver.StorageDriver
expected []string
registry distribution.Namespace
}
func setupFS(t *testing.T) *setupEnv {
d := inmemory.New()
c := []byte("")
ctx := context.Background()
registry := NewRegistryWithDriver(ctx, d, memory.NewInMemoryBlobDescriptorCacheProvider(), false, true)
rootpath, _ := defaultPathMapper.path(repositoriesRootPathSpec{})
repos := []string{
"/foo/a/_layers/1",
"/foo/b/_layers/2",
"/bar/c/_layers/3",
"/bar/d/_layers/4",
"/foo/d/in/_layers/5",
"/an/invalid/repo",
"/bar/d/_layers/ignored/dir/6",
}
for _, repo := range repos {
if err := d.PutContent(ctx, rootpath+repo, c); err != nil {
t.Fatalf("Unable to put to inmemory fs")
}
}
expected := []string{
"bar/c",
"bar/d",
"foo/a",
"foo/b",
"foo/d/in",
}
return &setupEnv{
ctx: ctx,
driver: d,
expected: expected,
registry: registry,
}
}
func TestCatalog(t *testing.T) {
env := setupFS(t)
p := make([]string, 50)
numFilled, err := env.registry.Repositories(env.ctx, p, "")
if !testEq(p, env.expected, numFilled) {
t.Errorf("Expected catalog repos err")
}
if err != io.EOF {
t.Errorf("Catalog has more values which we aren't expecting")
}
}
func TestCatalogInParts(t *testing.T) {
env := setupFS(t)
chunkLen := 2
p := make([]string, chunkLen)
numFilled, err := env.registry.Repositories(env.ctx, p, "")
if err == io.EOF || numFilled != len(p) {
t.Errorf("Expected more values in catalog")
}
if !testEq(p, env.expected[0:chunkLen], numFilled) {
t.Errorf("Expected catalog first chunk err")
}
lastRepo := p[len(p)-1]
numFilled, err = env.registry.Repositories(env.ctx, p, lastRepo)
if err == io.EOF || numFilled != len(p) {
t.Errorf("Expected more values in catalog")
}
if !testEq(p, env.expected[chunkLen:chunkLen*2], numFilled) {
t.Errorf("Expected catalog second chunk err")
}
lastRepo = p[len(p)-1]
numFilled, err = env.registry.Repositories(env.ctx, p, lastRepo)
if err != io.EOF {
t.Errorf("Catalog has more values which we aren't expecting")
}
if !testEq(p, env.expected[chunkLen*2:chunkLen*3-1], numFilled) {
t.Errorf("Expected catalog third chunk err")
}
}
func testEq(a, b []string, size int) bool {
for cnt := 0; cnt < size-1; cnt++ {
if a[cnt] != b[cnt] {
return false
}
}
return true
}