implement tests

src/commonTest/kotlin/com/infendro/encoding/Base8.kt

@@ -0,0 +1,34 @@
+package com.infendro.encoding
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class `Base8 Test` {
+    val encoding: Encoding
+        get() = Base8
+
+    val `Hello World!` = ubyteArrayOf(
+        0x48U, 0x65U, 0x6cU, 0x6cU,
+        0x6fU, 0x20U, 0x57U, 0x6fU,
+        0x72U, 0x6cU, 0x64U, 0x21U,
+    )
+
+    @Test
+    fun `encode empty ByteArray`() {
+        val expected = ubyteArrayOf()
+        val actual = encoding.encode(ubyteArrayOf())
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun `encode "Hello, World!"`() {
+        val expected = ubyteArrayOf(
+            0x32U, 0x32U, 0x30U, 0x36U, 0x32U, 0x35U, 0x35U, 0x34U,
+            0x33U, 0x33U, 0x30U, 0x36U, 0x37U, 0x34U, 0x34U, 0x30U,
+            0x32U, 0x35U, 0x36U, 0x36U, 0x37U, 0x35U, 0x36U, 0x32U,
+            0x33U, 0x33U, 0x30U, 0x36U, 0x32U, 0x30U, 0x34U, 0x31U,
+        )
+        val actual = encoding.encode(`Hello World!`)
+        assertContentEquals(expected, actual)
+    }
+}