adds test for #1431

test/core/path.js

@@ -0,0 +1,19 @@
+var babel = require("../../lib/babel/api/node");
+var chai  = require("chai");
+
+suite("traversal path", function () {
+  test("replaceWithSourceString", function () {
+    var expectCode = "function foo() {}";
+
+    var actualCode = babel.transform(expectCode, {
+      blacklist: "strict",
+      plugins: [new babel.Transformer("foobar", {
+        FunctionDeclaration: function () {
+          return "console.whatever()";
+        }
+      })]
+    }).code;
+
+    chai.expect(actualCode).to.be.equal("console.whatever();");
+  });
+});