.

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

@@ -0,0 +1,76 @@
+"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);
+        });
+    });
+
+    it("should not fail when toString is undefined", function () {
+        refute.exception(function () {
+            functionName(Object.create(null));
+        });
+    });
+
+    it("should not fail when toString throws", function () {
+        refute.exception(function () {
+            var fn;
+            try {
+                // eslint-disable-next-line no-eval
+                fn = eval("(function*() {})")().constructor;
+            } catch (e) {
+                // env doesn't support generators
+                return;
+            }
+
+            functionName(fn);
+        });
+    });
+});