implement optimizations

src/commonTest/kotlin/com/infendro/mac/HMAC.kt

@@ -1,6 +1,5 @@
 package com.infendro.mac
 
-import com.infendro.bytearray.encodeToUByteArray
 import com.infendro.hash.sha2.`SHA-256`
 import kotlin.test.Test
 import kotlin.test.assertContentEquals
@@ -16,22 +15,21 @@ class `HMAC Test` {
     }
 
     @Test
-    fun `example`() {
-        assertContentEquals(
-            ubyteArrayOf(
-                0xf7U, 0xbcU, 0x83U, 0xf4U,
-                0x30U, 0x53U, 0x84U, 0x24U,
-                0xb1U, 0x32U, 0x98U, 0xe6U,
-                0xaaU, 0x6fU, 0xb1U, 0x43U,
-                0xefU, 0x4dU, 0x59U, 0xa1U,
-                0x49U, 0x46U, 0x17U, 0x59U,
-                0x97U, 0x47U, 0x9dU, 0xbcU,
-                0x2dU, 0x1aU, 0x3cU, 0xd8U,
-            ),
-            hmac.hash(
-                "key".encodeToUByteArray(),
-                "The quick brown fox jumps over the lazy dog".encodeToUByteArray()
-            )
+    fun example() {
+        val expected = ubyteArrayOf(
+            0xf7U, 0xbcU, 0x83U, 0xf4U,
+            0x30U, 0x53U, 0x84U, 0x24U,
+            0xb1U, 0x32U, 0x98U, 0xe6U,
+            0xaaU, 0x6fU, 0xb1U, 0x43U,
+            0xefU, 0x4dU, 0x59U, 0xa1U,
+            0x49U, 0x46U, 0x17U, 0x59U,
+            0x97U, 0x47U, 0x9dU, 0xbcU,
+            0x2dU, 0x1aU, 0x3cU, 0xd8U,
+        ).asByteArray()
+        val actual = hmac.hash(
+            "key".encodeToByteArray(),
+            "The quick brown fox jumps over the lazy dog".encodeToByteArray(),
         )
+        assertContentEquals(expected, actual)
     }
 }