Fix isFunction failure message differences

The toString representation of functions has changed slightly between Node 8 and Node 10. Node 10 retains the original whitespace between the function keyword and the opening braces while Node 8 always inserts a blank.
sinonjs · Aug 7, 2018 · f463241 · f463241
1 parent b98bcb4
commit f463241
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/lib/assertions/is-function.js b/lib/assertions/is-function.js
@@ -11,7 +11,9 @@ module.exports = function(referee) {
         expectation: "toBeFunction",
         values: function(actual, message) {
             return {
-                actual: String(actual).replace("\n", ""),
+                actual: String(actual)
+                    .replace("function(", "function (")
+                    .replace("\n", ""),
                 actualType: typeof actual,
                 customMessage: message
             };