added unit testing, and started implementing unit tests...phew

node_modules/@sinonjs/commons/lib/function-name.test.js

@@ -0,0 +1,55 @@
+"use strict";
+
+var jsc = require("jsverify");
+var refute = require("@sinonjs/referee-sinon").refute;
+
+var functionName = require("./function-name");
+
+describe("function-name", function() {
+    it("should return empty string if func is falsy", function() {
+        jsc.assertForall("falsy", function(fn) {
+            return functionName(fn) === "";
+        });
+    });
+
+    it("should use displayName by default", function() {
+        jsc.assertForall("nestring", function(displayName) {
+            var fn = { displayName: displayName };
+
+            return functionName(fn) === fn.displayName;
+        });
+    });
+
+    it("should use name if displayName is not available", function() {
+        jsc.assertForall("nestring", function(name) {
+            var fn = { name: name };
+
+            return functionName(fn) === fn.name;
+        });
+    });
+
+    it("should fallback to string parsing", function() {
+        jsc.assertForall("nat", function(naturalNumber) {
+            var name = "fn" + naturalNumber;
+            var fn = {
+                toString: function() {
+                    return "\nfunction " + name;
+                }
+            };
+
+            return functionName(fn) === name;
+        });
+    });
+
+    it("should not fail when a name cannot be found", function() {
+        refute.exception(function() {
+            var fn = {
+                toString: function() {
+                    return "\nfunction (";
+                }
+            };
+
+            functionName(fn);
+        });
+    });
+});