Fixed some small paper-cuts

- Fixed a bug that was pushing duplicate view entries to the backstack
- The appended column will now be selected once added

test/testworkspace/workspace.go

@@ -0,0 +1,35 @@
+package testworkspace
+
+import (
+	"github.com/lmika/audax/internal/common/workspaces"
+	"github.com/stretchr/testify/assert"
+	"os"
+	"testing"
+)
+
+func New(t *testing.T) *workspaces.Workspace {
+	wsTempFile := tempFile(t)
+
+	wsManager := workspaces.New(workspaces.MetaInfo{Command: "dynamo-browse"})
+	ws, err := wsManager.Open(wsTempFile)
+	if err != nil {
+		t.Fatalf("cannot create workspace manager: %v", err)
+	}
+	t.Cleanup(func() { ws.Close() })
+
+	return ws
+}
+
+func tempFile(t *testing.T) string {
+	t.Helper()
+
+	tempFile, err := os.CreateTemp("", "export.csv")
+	assert.NoError(t, err)
+	tempFile.Close()
+
+	t.Cleanup(func() {
+		os.Remove(tempFile.Name())
+	})
+
+	return tempFile.Name()
+}