fix: better function name

oci_go_image/main_test.go

@@ -1,13 +1,14 @@
 package main
 
 import (
+	"strings"
 	"testing"
 )
 
-func TestGenerateNumber(t *testing.T) {
+func TestCompare(t *testing.T) {
 	result := Compare("this", "that")
 
-	if result == "" {
-		t.Error("got an empty string")
+	if !strings.Contains(result, "this") {
+		t.Error("expected a diff containing 'this' but got", result)
 	}
 }