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package tarsum // import "github.com/docker/docker/pkg/tarsum"
import (
"io"
"os"
"testing"
)
// Try to remove tarsum (in the BuilderContext) that do not exists, won't change a thing
func TestTarSumRemoveNonExistent(t *testing.T) {
filename := "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar"
reader, err := os.Open(filename)
if err != nil {
t.Fatal(err)
}
defer reader.Close()
ts, err := NewTarSum(reader, false, Version0)
if err != nil {
t.Fatal(err)
}
// Read and discard bytes so that it populates sums
_, err = io.Copy(io.Discard, ts)
if err != nil {
t.Errorf("failed to read from %s: %s", filename, err)
}
expected := len(ts.GetSums())
ts.(BuilderContext).Remove("")
ts.(BuilderContext).Remove("Anything")
if len(ts.GetSums()) != expected {
t.Fatalf("Expected %v sums, go %v.", expected, ts.GetSums())
}
}
// Remove a tarsum (in the BuilderContext)
func TestTarSumRemove(t *testing.T) {
filename := "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar"
reader, err := os.Open(filename)
if err != nil {
t.Fatal(err)
}
defer reader.Close()
ts, err := NewTarSum(reader, false, Version0)
if err != nil {
t.Fatal(err)
}
// Read and discard bytes so that it populates sums
_, err = io.Copy(io.Discard, ts)
if err != nil {
t.Errorf("failed to read from %s: %s", filename, err)
}
expected := len(ts.GetSums()) - 1
ts.(BuilderContext).Remove("etc/sudoers")
if len(ts.GetSums()) != expected {
t.Fatalf("Expected %v sums, go %v.", expected, len(ts.GetSums()))
}
}
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