Add a benchmark for generating one-time passwords as strings

Author: jchambers

src/benchmark/java/com/eatthepath/otp/HmacOneTimePasswordGeneratorBenchmark.java

@@ -32,4 +32,9 @@ public void setUp() throws NoSuchAlgorithmException {
     public int benchmarkGenerateOneTimePassword() throws InvalidKeyException {
         return this.hotp.generateOneTimePassword(this.key, this.counter++);
     }
+
+    @Benchmark
+    public String benchmarkGenerateOneTimePasswordString() throws InvalidKeyException {
+        return this.hotp.generateOneTimePasswordString(this.key, this.counter++);
+    }
 }