1 files changed, 62 insertions, 0 deletions
diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..085dc24
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,62 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestLogEntryCreatesFile(t *testing.T) {
+	dir := t.TempDir()
+	text := "hello world"
+
+	if err := logEntry(dir, text); err != nil {
+		t.Fatalf("logEntry returned error: %v", err)
+	}
+
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		t.Fatalf("reading dir: %v", err)
+	}
+	if len(entries) != 1 {
+		t.Fatalf("expected 1 file, got %d", len(entries))
+	}
+
+	name := entries[0].Name()
+	if !strings.HasPrefix(name, "ql-") || !strings.HasSuffix(name, ".md") {
+		t.Errorf("unexpected filename pattern: %s", name)
+	}
+
+	content, err := os.ReadFile(filepath.Join(dir, name))
+	if err != nil {
+		t.Fatalf("reading file: %v", err)
+	}
+	if string(content) != text {
+		t.Errorf("expected %q, got %q", text, string(content))
+	}
+}
+
+func TestLogEntryInvalidDir(t *testing.T) {
+	err := logEntry("/nonexistent/path/that/should/not/exist", "test")
+	if err == nil {
+		t.Fatal("expected error for invalid directory, got nil")
+	}
+}
+
+func TestLogEntryEmptyText(t *testing.T) {
+	dir := t.TempDir()
+	if err := logEntry(dir, ""); err != nil {
+		t.Fatalf("logEntry with empty text returned error: %v", err)
+	}
+
+	entries, _ := os.ReadDir(dir)
+	if len(entries) != 1 {
+		t.Fatalf("expected 1 file, got %d", len(entries))
+	}
+
+	content, _ := os.ReadFile(filepath.Join(dir, entries[0].Name()))
+	if len(content) != 0 {
+		t.Errorf("expected empty file, got %d bytes", len(content))
+	}
+}