reflect: add tests that verify that [Slice,String]Header is the same …

…size as [slice,string]
tinygo-org · Mar 3, 2024 · 2ef1270 · 2ef1270
1 parent c5fcbbb
commit 2ef1270
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diff --git a/src/reflect/intw_avr_test.go b/src/reflect/intw_avr_test.go
@@ -5,8 +5,12 @@ package reflect_test
 import (
 	"reflect"
 	"testing"
+	"unsafe"
 )
 
+// Verify that SliceHeader is the same size as a slice.
+var _ [unsafe.Sizeof([]byte{})]byte = [unsafe.Sizeof(reflect.SliceHeader{})]byte{}
+
 // TestSliceHeaderIntegerSize verifies that SliceHeader.Len and Cap are type uintptr on AVR platforms.
 // See https://github.com/tinygo-org/tinygo/issues/1284.
 func TestSliceHeaderIntegerSize(t *testing.T) {
@@ -15,6 +19,9 @@ func TestSliceHeaderIntegerSize(t *testing.T) {
 	h.Cap = uintptr(0)
 }
 
+// Verify that StringHeader is the same size as a string.
+var _ [unsafe.Sizeof("hello")]byte = [unsafe.Sizeof(reflect.StringHeader{})]byte{}
+
 // TestStringHeaderIntegerSize verifies that StringHeader.Len and Cap are type uintptr on AVR platforms.
 // See https://github.com/tinygo-org/tinygo/issues/1284.
 func TestStringHeaderIntegerSize(t *testing.T) {

diff --git a/src/reflect/intw_test.go b/src/reflect/intw_test.go
@@ -5,8 +5,12 @@ package reflect_test
 import (
 	"reflect"
 	"testing"
+	"unsafe"
 )
 
+// Verify that SliceHeader is the same size as a slice.
+var _ [unsafe.Sizeof([]byte{})]byte = [unsafe.Sizeof(reflect.SliceHeader{})]byte{}
+
 // TestSliceHeaderIntegerSize verifies that SliceHeader.Len and Cap are type int on non-AVR platforms.
 // See https://github.com/tinygo-org/tinygo/issues/1284.
 func TestSliceHeaderIntegerSize(t *testing.T) {
@@ -15,6 +19,9 @@ func TestSliceHeaderIntegerSize(t *testing.T) {
 	h.Cap = int(0)
 }
 
+// Verify that StringHeader is the same size as a string.
+var _ [unsafe.Sizeof("hello")]byte = [unsafe.Sizeof(reflect.StringHeader{})]byte{}
+
 // TestStringHeaderIntegerSize verifies that StringHeader.Len and Cap are type int on non-AVR platforms.
 // See https://github.com/tinygo-org/tinygo/issues/1284.
 func TestStringHeaderIntegerSize(t *testing.T) {