Add no logger tests.

simple-console.js

@@ -69,6 +69,7 @@
   };
 
   // UMD wrapper: Borrowed from webpack version.
+  /* istanbul ignore next */
   function umd() {
     if (typeof exports === "object" && typeof module === "object") {
       // CommonJS

test/spec/simple-console.spec.js

@@ -1,4 +1,31 @@
 describe("simple-console", function () {
+  describe("no logger", function () {
+    var conStub,
+      con;
+
+    beforeEach(function () {
+      // By default, returns `undefined`.
+      conStub = sinon.stub(SimpleConsole.prototype, "_getConsole");
+      con = new SimpleConsole();
+    });
+
+    afterEach(function () {
+      conStub.restore();
+    });
+
+    it("should invoke lots of functions and not die", function () {
+      con.log("log");
+      con.log.apply(con, ["log apply"]);
+      con.log.call(con, "log call");
+      con.warn("warn");
+      con.warn.apply(con, ["warn apply"]);
+      con.warn.call(con, "warn call");
+      con.error("warn");
+      con.error.apply(con, ["warn apply"]);
+      con.error.call(con, "warn call");
+    });
+  });
+
   describe("invocations", function () {
     var con;
 
@@ -8,7 +35,7 @@ describe("simple-console", function () {
 
     // Just do a lot of invocations and see if anything dies.
     // This _will_ clog the output, so do them last...
-    it("should invoke lots of functions", function () {
+    it("should invoke lots of functions and maybe log out", function () {
       con.log("log");
       con.log.apply(con, ["log apply"]);
       con.log.call(con, "log call");