tests

app/src/test/kotlin/com/bitchat/MeshPacketUtilsTest.kt

@@ -0,0 +1,45 @@
+package com.bitchat
+
+import com.bitchat.android.mesh.MeshPacketUtils
+import junit.framework.TestCase.assertEquals
+import org.junit.Test
+
+class MeshPacketUtilsTest {
+    @Test
+    fun hexStringToByteArray_parsesFullId() {
+        val bytes = MeshPacketUtils.hexStringToByteArray("0011223344556677")
+        assertEquals(8, bytes.size)
+        assertEquals(0x00.toByte(), bytes[0])
+        assertEquals(0x11.toByte(), bytes[1])
+        assertEquals(0x22.toByte(), bytes[2])
+        assertEquals(0x33.toByte(), bytes[3])
+        assertEquals(0x44.toByte(), bytes[4])
+        assertEquals(0x55.toByte(), bytes[5])
+        assertEquals(0x66.toByte(), bytes[6])
+        assertEquals(0x77.toByte(), bytes[7])
+    }
+
+    @Test
+    fun hexStringToByteArray_parsesShortId() {
+        val bytes = MeshPacketUtils.hexStringToByteArray("ab")
+        assertEquals(8, bytes.size)
+        assertEquals(0xab.toByte(), bytes[0])
+        assertEquals(0x00.toByte(), bytes[1])
+    }
+
+    @Test
+    fun hexStringToByteArray_handlesInvalidHex() {
+        val bytes = MeshPacketUtils.hexStringToByteArray("zz")
+        assertEquals(8, bytes.size)
+        assertEquals(0x00.toByte(), bytes[0])
+    }
+
+    @Test
+    fun sha256Hex_matchesKnownValue() {
+        val hash = MeshPacketUtils.sha256Hex("hello".toByteArray())
+        assertEquals(
+            "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
+            hash
+        )
+    }
+}