Added NoteStore interface, mock and repository with Create method

internal/repository/notes_test.go

@@ -0,0 +1,74 @@
+package repository_test
+
+import (
+	"testing"
+	"testing/synctest"
+
+	"time"
+	"fmt"
+
+	"git.hrafn.xyz/aether/notes/internal/models"
+	"git.hrafn.xyz/aether/notes/internal/repository"
+)
+
+func TestCreateNote(t *testing.T) {
+	testCases := []struct {
+		name    string
+		content string
+		expectedNote models.Note
+		expectedError bool
+	}{
+		{
+			name: "Good note",
+			content: "This is a good note with valid content.",
+			expectedNote: models.Note{
+				ID:        1,
+				CreatedAt: time.Date(0001, 1, 1, 0, 0, 0, 0, time.UTC), //CreatedAt is set by synctest to this specific time
+				Content:   "This is a good note with valid content.",
+			},
+			expectedError: false,
+		},
+		{
+			name: "Empty content",
+			content: "",
+			expectedNote: models.Note{},
+			expectedError: true,
+		},
+		{
+			name: "Long content",
+			content: "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
+			expectedNote: models.Note{
+				ID:        2,
+				CreatedAt: time.Date(0001, 1, 1, 0, 0, 0, 0, time.UTC),
+				Content:   "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
+			},
+			expectedError: false,
+		},
+	}
+	repo := repository.NewNoteRepository(&mockNoteStore{})
+		for _, tc := range testCases {
+
+		synctest.Test(t, func(t *testing.T) {
+				note, err := repo.CreateNote(tc.content)
+				if tc.expectedError {
+					if err == nil {
+						t.Errorf("expected an error but got none")
+					}
+				} else {
+					if err != nil {
+						t.Errorf("unexpected error: %v", err)
+					}
+				}
+				if note.Content != tc.expectedNote.Content {
+					t.Errorf("expected content %q but got %q", tc.expectedNote.Content, note.Content)
+				}
+				if note.ID != tc.expectedNote.ID {
+					t.Errorf("expected ID %d but got %d", tc.expectedNote.ID, note.ID)
+				}
+				if !note.CreatedAt.Equal(tc.expectedNote.CreatedAt) {
+					t.Errorf("expected CreatedAt %v but got %v", tc.expectedNote.CreatedAt, note.CreatedAt)
+				}
+				fmt.Printf("Test case '%s' passed.\n", tc.name)
+			})
+		}
+	}