move implementation to internal/ directory (#828)

internal/platformtest/tests/undestroyableSnapshotParsing.go

@@ -0,0 +1,37 @@
+package tests
+
+import (
+	"fmt"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/zrepl/zrepl/internal/platformtest"
+	"github.com/zrepl/zrepl/internal/zfs"
+)
+
+func UndestroyableSnapshotParsing(t *platformtest.Context) {
+	platformtest.Run(t, platformtest.PanicErr, t.RootDataset, `
+		DESTROYROOT
+		CREATEROOT
+		+  "foo bar"
+		+  "foo bar@1 2 3"
+		+  "foo bar@4 5 6"
+		+  "foo bar@7 8 9"
+		R  zfs hold zrepl_platformtest "${ROOTDS}/foo bar@4 5 6"
+	`)
+
+	err := zfs.ZFSDestroy(t, fmt.Sprintf("%s/foo bar@1 2 3,4 5 6,7 8 9", t.RootDataset))
+	if err == nil {
+		panic("expecting destroy error due to hold")
+	}
+	if dse, ok := err.(*zfs.DestroySnapshotsError); !ok {
+		panic(fmt.Sprintf("expecting *zfs.DestroySnapshotsError, got %T\n%v\n%s", err, err, err))
+	} else {
+		if dse.Filesystem != fmt.Sprintf("%s/foo bar", t.RootDataset) {
+			panic(dse.Filesystem)
+		}
+		require.Equal(t, []string{"4 5 6"}, dse.Undestroyable)
+		require.Equal(t, []string{"dataset is busy"}, dse.Reason)
+	}
+
+}