restorer: extract hardlinks index from restic package

internal/restorer/hardlinks_index_test.go

@@ -0,0 +1,33 @@
+package restorer_test
+
+import (
+	"testing"
+
+	"github.com/restic/restic/internal/restorer"
+	rtest "github.com/restic/restic/internal/test"
+)
+
+// TestHardLinks contains various tests for HardlinkIndex.
+func TestHardLinks(t *testing.T) {
+
+	idx := restorer.NewHardlinkIndex()
+
+	idx.Add(1, 2, "inode1-file1-on-device2")
+	idx.Add(2, 3, "inode2-file2-on-device3")
+
+	sresult := idx.GetFilename(1, 2)
+	rtest.Equals(t, sresult, "inode1-file1-on-device2")
+
+	sresult = idx.GetFilename(2, 3)
+	rtest.Equals(t, sresult, "inode2-file2-on-device3")
+
+	bresult := idx.Has(1, 2)
+	rtest.Equals(t, bresult, true)
+
+	bresult = idx.Has(1, 3)
+	rtest.Equals(t, bresult, false)
+
+	idx.Remove(1, 2)
+	bresult = idx.Has(1, 2)
+	rtest.Equals(t, bresult, false)
+}