func (*metadataHelperSuite) TestResolveMetadata(c *gc.C) {
var versionStrings = []string{"1.2.3-precise-amd64"}
dir := c.MkDir()
ttesting.MakeTools(c, dir, "releases", versionStrings)
toolsList := coretools.List{{
Version: version.MustParseBinary(versionStrings[0]),
Size: 123,
SHA256: "abc",
}}
stor, err := filestorage.NewFileStorageReader(dir)
c.Assert(err, gc.IsNil)
err = tools.ResolveMetadata(stor, nil)
c.Assert(err, gc.IsNil)
// We already have size/sha256, so ensure that storage isn't consulted.
countingStorage := &countingStorage{StorageReader: stor}
metadata := tools.MetadataFromTools(toolsList)
err = tools.ResolveMetadata(countingStorage, metadata)
c.Assert(err, gc.IsNil)
c.Assert(countingStorage.counter, gc.Equals, 0)
// Now clear size/sha256, and check that it is called, and
// the size/sha256 sum are updated.
metadata[0].Size = 0
metadata[0].SHA256 = ""
err = tools.ResolveMetadata(countingStorage, metadata)
c.Assert(err, gc.IsNil)
c.Assert(countingStorage.counter, gc.Equals, 1)
c.Assert(metadata[0].Size, gc.Not(gc.Equals), 0)
c.Assert(metadata[0].SHA256, gc.Not(gc.Equals), "")
}
// This is essentially the same as tools.MergeAndWriteMetadata, but also
// resolves metadata for existing tools by fetching them and computing
// size/sha256 locally.
func mergeAndWriteMetadata(stor storage.Storage, toolsList coretools.List, writeMirrors envtools.ShouldWriteMirrors) error {
existing, err := envtools.ReadMetadata(stor)
if err != nil {
return err
}
metadata := envtools.MetadataFromTools(toolsList)
if metadata, err = envtools.MergeMetadata(metadata, existing); err != nil {
return err
}
if err = envtools.ResolveMetadata(stor, metadata); err != nil {
return err
}
return envtools.WriteMetadata(stor, metadata, writeMirrors)
}