Add test cases for open disk partition

compaction.go

@@ -89,6 +89,7 @@ func newSeriesDecoder(r io.Reader) (seriesDecoder, error) {
 		return nil, fmt.Errorf("failed to new gzip reader: %w", err)
 	}
 
+	// FIXME: Use another way to write decompressed data and turn it into io.ReadSeeker
 	buf := new(bytes.Buffer)
 	if _, err := io.Copy(buf, gzipReader); err != nil {
 		return nil, fmt.Errorf("failed to copy bytes: %w", err)

disk_partition_test.go

@@ -1,6 +1,11 @@
 package tstorage
 
-/*
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
 func TestOpenDiskPartition(t *testing.T) {
 	tests := []struct {
 		name    string
@@ -9,14 +14,9 @@ func TestOpenDiskPartition(t *testing.T) {
 		wantErr bool
 	}{
 		{
-			name:    "existent dir given",
-			dirPath: "./testdata",
-			want: &diskPartition{
-				dirPath:   "./testdata",
-				numPoints: 2,
-				minT:      1600000000,
-				maxT:      1600000001,
-			},
+			name:    "empty dir name given",
+			dirPath: "",
+			wantErr: true,
 		},
 		{
 			name:    "non-existent dir given",
@@ -26,11 +26,9 @@ func TestOpenDiskPartition(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got, err := openDiskPartition(tt.dirPath, newGzipDecompressor)
+			got, err := openDiskPartition(tt.dirPath)
 			assert.Equal(t, tt.wantErr, err != nil)
 			assert.Equal(t, tt.want, got)
 		})
 	}
 }
-
-*/