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observing_resolver.go
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/
observing_resolver.go
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package pkgtest
import (
"context"
"fmt"
"io"
"sort"
"github.com/scylladb/go-set/strset"
"github.com/anchore/syft/syft/file"
)
var _ file.Resolver = (*ObservingResolver)(nil)
type ObservingResolver struct {
decorated file.Resolver
pathQueries map[string][]string
pathResponses []file.Location
contentQueries []file.Location
emptyPathResponses map[string][]string
}
func NewObservingResolver(resolver file.Resolver) *ObservingResolver {
return &ObservingResolver{
decorated: resolver,
pathResponses: make([]file.Location, 0),
emptyPathResponses: make(map[string][]string),
pathQueries: make(map[string][]string),
}
}
// testing helpers...
func (r *ObservingResolver) ObservedPathQuery(input string) bool {
for _, vs := range r.pathQueries {
for _, v := range vs {
if v == input {
return true
}
}
}
return false
}
func (r *ObservingResolver) ObservedPathResponses(path string) bool {
for _, loc := range r.pathResponses {
if loc.RealPath == path {
return true
}
}
return false
}
func (r *ObservingResolver) ObservedContentQueries(path string) bool {
for _, loc := range r.contentQueries {
if loc.RealPath == path {
return true
}
}
return false
}
func (r *ObservingResolver) AllContentQueries() []string {
observed := strset.New()
for _, loc := range r.contentQueries {
observed.Add(loc.RealPath)
}
return observed.List()
}
func (r *ObservingResolver) AllPathQueries() map[string][]string {
return r.pathQueries
}
func (r *ObservingResolver) PruneUnfulfilledPathResponses(ignore map[string][]string, ignorePaths ...string) {
if ignore == nil {
return
}
// remove any paths that were ignored for specific calls
for k, v := range ignore {
results := r.emptyPathResponses[k]
for _, ig := range v {
for i, result := range results {
if result == ig {
results = append(results[:i], results[i+1:]...)
break
}
}
}
if len(results) > 0 {
r.emptyPathResponses[k] = results
} else {
delete(r.emptyPathResponses, k)
}
}
// remove any paths that were ignored for all calls
for _, ig := range ignorePaths {
for k, v := range r.emptyPathResponses {
for i, result := range v {
if result == ig {
v = append(v[:i], v[i+1:]...)
break
}
}
if len(v) > 0 {
r.emptyPathResponses[k] = v
} else {
delete(r.emptyPathResponses, k)
}
}
}
}
func (r *ObservingResolver) HasUnfulfilledPathRequests() bool {
return len(r.emptyPathResponses) > 0
}
func (r *ObservingResolver) PrettyUnfulfilledPathRequests() string {
var res string
var keys []string
for k := range r.emptyPathResponses {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
res += fmt.Sprintf(" %s: %+v\n", k, r.emptyPathResponses[k])
}
return res
}
// For the file path resolver...
func (r *ObservingResolver) addPathQuery(name string, input ...string) {
r.pathQueries[name] = append(r.pathQueries[name], input...)
}
func (r *ObservingResolver) addPathResponse(locs ...file.Location) {
r.pathResponses = append(r.pathResponses, locs...)
}
func (r *ObservingResolver) addEmptyPathResponse(name string, locs []file.Location, paths ...string) {
if len(locs) == 0 {
results := r.emptyPathResponses[name]
results = append(results, paths...)
r.emptyPathResponses[name] = results
}
}
func (r *ObservingResolver) FilesByPath(paths ...string) ([]file.Location, error) {
name := "FilesByPath"
r.addPathQuery(name, paths...)
locs, err := r.decorated.FilesByPath(paths...)
r.addPathResponse(locs...)
r.addEmptyPathResponse(name, locs, paths...)
return locs, err
}
func (r *ObservingResolver) FilesByGlob(patterns ...string) ([]file.Location, error) {
name := "FilesByGlob"
r.addPathQuery(name, patterns...)
locs, err := r.decorated.FilesByGlob(patterns...)
r.addPathResponse(locs...)
r.addEmptyPathResponse(name, locs, patterns...)
return locs, err
}
func (r *ObservingResolver) FilesByMIMEType(types ...string) ([]file.Location, error) {
name := "FilesByMIMEType"
r.addPathQuery(name, types...)
locs, err := r.decorated.FilesByMIMEType(types...)
r.addPathResponse(locs...)
r.addEmptyPathResponse(name, locs, types...)
return locs, err
}
func (r *ObservingResolver) RelativeFileByPath(l file.Location, path string) *file.Location {
name := "RelativeFileByPath"
r.addPathQuery(name, path)
loc := r.decorated.RelativeFileByPath(l, path)
if loc != nil {
r.addPathResponse(*loc)
} else {
results := r.emptyPathResponses[name]
results = append(results, path)
r.emptyPathResponses[name] = results
}
return loc
}
// For the content resolver methods...
func (r *ObservingResolver) FileContentsByLocation(location file.Location) (io.ReadCloser, error) {
r.contentQueries = append(r.contentQueries, location)
reader, err := r.decorated.FileContentsByLocation(location)
return reader, err
}
// For the remaining resolver methods...
func (r *ObservingResolver) AllLocations(ctx context.Context) <-chan file.Location {
return r.decorated.AllLocations(ctx)
}
func (r *ObservingResolver) HasPath(s string) bool {
return r.decorated.HasPath(s)
}
func (r *ObservingResolver) FileMetadataByLocation(location file.Location) (file.Metadata, error) {
return r.decorated.FileMetadataByLocation(location)
}