/
testing.go
102 lines (87 loc) · 3.76 KB
/
testing.go
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// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package testing
import (
"fmt"
"io/ioutil"
"path"
"sort"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
"github.com/juju/utils/set"
gc "gopkg.in/check.v1"
"github.com/juju/juju/environs/filestorage"
"github.com/juju/juju/environs/imagemetadata"
"github.com/juju/juju/environs/simplestreams"
"github.com/juju/juju/environs/storage"
)
// PatchOfficialDataSources is used by tests.
// We replace one of the urls with the supplied value
// and prevent the other from being used.
func PatchOfficialDataSources(s *testing.CleanupSuite, url string) {
s.PatchValue(&imagemetadata.DefaultUbuntuBaseURL, "")
s.PatchValue(&imagemetadata.DefaultJujuBaseURL, url)
}
// ParseMetadataFromDir loads ImageMetadata from the specified directory.
func ParseMetadataFromDir(c *gc.C, metadataDir string) []*imagemetadata.ImageMetadata {
stor, err := filestorage.NewFileStorageReader(metadataDir)
c.Assert(err, jc.ErrorIsNil)
return ParseMetadataFromStorage(c, stor)
}
// ParseIndexMetadataFromStorage loads Indices from the specified storage reader.
func ParseIndexMetadataFromStorage(c *gc.C, stor storage.StorageReader) (*simplestreams.IndexMetadata, simplestreams.DataSource) {
source := storage.NewStorageSimpleStreamsDataSource("test storage reader", stor, "images", simplestreams.DEFAULT_CLOUD_DATA, false)
// Find the simplestreams index file.
params := simplestreams.ValueParams{
DataType: "image-ids",
ValueTemplate: imagemetadata.ImageMetadata{},
}
const requireSigned = false
indexPath := simplestreams.UnsignedIndex("v1", 1)
mirrorsPath := simplestreams.MirrorsPath("v1")
indexRef, err := simplestreams.GetIndexWithFormat(
source, indexPath, "index:1.0", mirrorsPath, requireSigned, simplestreams.CloudSpec{}, params)
c.Assert(err, jc.ErrorIsNil)
c.Assert(indexRef.Indexes, gc.HasLen, 1)
imageIndexMetadata := indexRef.Indexes["com.ubuntu.cloud:custom"]
c.Assert(imageIndexMetadata, gc.NotNil)
return imageIndexMetadata, source
}
// ParseMetadataFromStorage loads ImageMetadata from the specified storage reader.
func ParseMetadataFromStorage(c *gc.C, stor storage.StorageReader) []*imagemetadata.ImageMetadata {
imageIndexMetadata, source := ParseIndexMetadataFromStorage(c, stor)
c.Assert(imageIndexMetadata, gc.NotNil)
// Read the products file contents.
r, err := stor.Get(path.Join("images", imageIndexMetadata.ProductsFilePath))
defer r.Close()
c.Assert(err, jc.ErrorIsNil)
data, err := ioutil.ReadAll(r)
c.Assert(err, jc.ErrorIsNil)
// Parse the products file metadata.
url, err := source.URL(imageIndexMetadata.ProductsFilePath)
c.Assert(err, jc.ErrorIsNil)
cloudMetadata, err := simplestreams.ParseCloudMetadata(data, "products:1.0", url, imagemetadata.ImageMetadata{})
c.Assert(err, jc.ErrorIsNil)
// Collate the metadata.
imageMetadataMap := make(map[string]*imagemetadata.ImageMetadata)
expectedProductIds, imageVersions := make(set.Strings), make(set.Strings)
for _, mc := range cloudMetadata.Products {
for _, items := range mc.Items {
for key, item := range items.Items {
imageMetadata := item.(*imagemetadata.ImageMetadata)
imageMetadataMap[key] = imageMetadata
imageVersions.Add(key)
productId := fmt.Sprintf("com.ubuntu.cloud:server:%s:%s", mc.Version, imageMetadata.Arch)
expectedProductIds.Add(productId)
}
}
}
// Make sure index's product IDs are all represented in the products metadata.
sort.Strings(imageIndexMetadata.ProductIds)
c.Assert(imageIndexMetadata.ProductIds, gc.DeepEquals, expectedProductIds.SortedValues())
imageMetadata := make([]*imagemetadata.ImageMetadata, len(imageMetadataMap))
for i, key := range imageVersions.SortedValues() {
imageMetadata[i] = imageMetadataMap[key]
}
return imageMetadata
}