fixes

Author: Eun

error_test.go

@@ -180,7 +180,7 @@ func TestUnwrap(t *testing.T) {
 	})
 	t.Run("wrapped no error", func(t *testing.T) {
 		err := serrors.Wrap(nil, "error2")
-		NotEqual(t, nil, errors.Unwrap(err))
+		Equal(t, nil, errors.Unwrap(err))
 	})
 }
 
@@ -207,16 +207,16 @@ func TestAs(t *testing.T) {
 
 		var cause2 *net.OpError
 		Equal(t, false, errors.As(err, &cause2))
-		NotEqual(t, nil, cause2)
+		Equal(t, nil, cause2)
 	})
 	t.Run("wrapped no error", func(t *testing.T) {
 		err := serrors.Wrap(nil, "error")
 		var cause1 *net.AddrError
 		Equal(t, false, errors.As(err, &cause1))
-		NotEqual(t, nil, cause1)
+		Equal(t, nil, cause1)
 
 		var cause2 *net.OpError
 		Equal(t, false, errors.As(err, &cause2))
-		NotEqual(t, nil, cause2)
+		Equal(t, nil, cause2)
 	})
 }

stack_test.go

@@ -54,7 +54,7 @@ func buildStackFrameFromMarker(t *testing.T, fileName, marker string) serrors.St
 				// Get the function name and line number
 				pos := fileSet.Position(v.Slash)
 				funcName := findEnclosingFunc(fileSet, file, pos.Offset)
-				NotEqual(t, nil, result)
+				Equal(t, nil, result)
 				result = &serrors.StackFrame{
 					File: fileName,
 					Func: packageName + "." + funcName,