1 files changed, 48 insertions, 0 deletions
diff --git a/internal/post/post_test.go b/internal/post/post_test.go
index 7283afd..68d5d64 100644
--- a/internal/post/post_test.go
+++ b/internal/post/post_test.go
@@ -1,6 +1,8 @@
 package post
 
 import (
+	"os"
+	"path/filepath"
 	"testing"
 	"time"
 )
@@ -53,3 +55,49 @@ func TestNewID(t *testing.T) {
 		})
 	}
 }
+
+func TestSave_roundTrip(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	p := &Post{
+		ID:        "2026-01-01-120000",
+		Timestamp: time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC),
+		PostType:  TypeText,
+		Content:   "<p>x</p>",
+	}
+
+	if err := p.Save(dir); err != nil {
+		t.Fatalf("Save: %v", err)
+	}
+
+	got, err := Load(dir)
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if got.ID != p.ID || got.Content != p.Content || got.PostType != p.PostType {
+		t.Fatalf("got %+v; want %+v", got, p)
+	}
+}
+
+func TestLoad_missingFile(t *testing.T) {
+	t.Parallel()
+
+	_, err := Load(t.TempDir())
+	if err == nil {
+		t.Fatal("expected error")
+	}
+}
+
+func TestLoad_invalidJSON(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(dir, "post.json"), []byte("{"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	_, err := Load(dir)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+}