initial commit (moved from divan)

src/commonTest/kotlin/ToolsTest.kt

@@ -0,0 +1,20 @@
+import kotlinx.coroutines.test.runTest
+import net.sergeych.crypto.createContrail
+import net.sergeych.crypto.initCrypto
+import net.sergeych.crypto.isValidContrail
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class ToolsTest {
+    @Test
+    fun testContrails() = runTest {
+        initCrypto()
+        val c = createContrail(ubyteArrayOf(1u, 2u, 3u, 4u, 5u))
+        assertEquals(134u, c[0])
+        assertTrue { isValidContrail(c) }
+        c[2] = 11u
+        assertFalse { isValidContrail(c) }
+    }
+}