Tests: Add tests for internal/query

internal/query/duplicates_test.go

@@ -1,13 +1,26 @@
 package query
 
 import (
+	"github.com/stretchr/testify/assert"
 	"testing"
 )
 
+//TODO find duplicates
 func TestDuplicates(t *testing.T) {
-	if files, err := Duplicates(10, 0, ""); err != nil {
-		t.Fatal(err)
-	} else if files == nil {
-		t.Fatal("files must not be nil")
-	}
+	t.Run("success", func(t *testing.T) {
+		if files, err := Duplicates(10, 0, ""); err != nil {
+			t.Fatal(err)
+		} else if files == nil {
+			t.Fatal("files must not be nil")
+		}
+	})
+	t.Run("pathname not empty", func(t *testing.T) {
+		files, err := Duplicates(10, 0, "/holiday/sea.jpg")
+
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		assert.Empty(t, files)
+	})
 }