Support assert.Empty for string in test

Author: BooleanCat

internal/assert/assert.go

@@ -57,7 +57,7 @@ func SliceEqual[T comparable](t *testing.T, a, b []T) {
 	}
 }
 
-func Empty[T any](t *testing.T, items []T) {
+func Empty[S any, T []S | ~string](t *testing.T, items T) {
 	t.Helper()
 
 	if len(items) != 0 {

iter/filter_test.go

@@ -123,7 +123,7 @@ func TestFilterMapEmpty(t *testing.T) {
 		selectEvenAndDouble,
 	)
 
-	assert.Empty(t, iter.Collect(fltMapEmpty))
+	assert.Empty[int](t, iter.Collect(fltMapEmpty))
 }
 
 func TestFilterMapExhausted(t *testing.T) {

iter/iter_test.go

@@ -42,7 +42,7 @@ func TestCollect(t *testing.T) {
 
 func TestCollectEmpty(t *testing.T) {
 	items := iter.Collect[int](iter.Take[int](iter.Count(), 0))
-	assert.Empty(t, items)
+	assert.Empty[int](t, items)
 }
 
 func TestFold(t *testing.T) {

iter/map_test.go

@@ -30,7 +30,7 @@ func TestMap(t *testing.T) {
 func TestMapEmpty(t *testing.T) {
 	double := func(a int) int { return a * 2 }
 	items := iter.Collect[int](iter.Map[int](iter.Exhausted[int](), double))
-	assert.Empty(t, items)
+	assert.Empty[int](t, items)
 }
 
 func TestMapExhausted(t *testing.T) {