From 851b69baf92d2bb98364d75750be0e8a59c03df9 Mon Sep 17 00:00:00 2001
From: Adam Luzsi <adamluzsi@gmail.com>
Date: Wed, 6 Mar 2024 23:28:44 +0100
Subject: [PATCH] Message Formatting function for assert package

This should make it easier to have fmt style formatted messages in the assertions.
---
 assert/message.go      | 6 ++++++
 assert/message_test.go | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/assert/message.go b/assert/message.go
index 541b4fd..caa90f6 100644
--- a/assert/message.go
+++ b/assert/message.go
@@ -1,7 +1,13 @@
 package assert
 
+import "fmt"
+
 type Message string
 
+func MessageF(format string, args ...any) Message {
+	return Message(fmt.Sprintf(format, args...))
+}
+
 func toMsg(msg []Message) []any {
 	var out []any
 	for _, m := range msg {
diff --git a/assert/message_test.go b/assert/message_test.go
index e0a6a5b..ef57991 100644
--- a/assert/message_test.go
+++ b/assert/message_test.go
@@ -22,3 +22,8 @@ func TestMessage(t *testing.T) {
 	a.True(false, exp)
 	assert.Contain(t, dtb.Logs.String(), strings.TrimSpace(string(exp)))
 }
+
+func TestMessagef(t *testing.T) {
+	exp := assert.MessageF("answer:%d", 42)
+	assert.Equal[assert.Message](t, exp, "answer:42")
+}