test: add a lot of unit tests to improve the overall code coverage

apollo/karma.config.d/timeout.js

@@ -1,9 +1,9 @@
 config.set({
-    browserDisconnectTimeout: 5000,
-    processKillTimeout: 5000,
+    browserDisconnectTimeout: 10000,
+    processKillTimeout: 10000,
     client: {
         mocha: {
-            timeout: 5000
+            timeout: 10000
         }
     }
 });

apollo/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt

@@ -13,7 +13,7 @@ actual class KMMX25519PrivateKey(val raw: ByteArray) {
      *
      * @return The generated public key.
      */
-    fun publicKey(): KMMX25519PublicKey {
+    actual fun publicKey(): KMMX25519PublicKey {
         val private = X25519PrivateKeyParameters(raw, 0)
         val public = private.generatePublicKey()
         return KMMX25519PublicKey(public.encoded)

apollo/src/androidUnitTest/kotlin/io/iohk/atala/prism/apollo/PlatformTests.kt

@@ -0,0 +1,11 @@
+package io.iohk.atala.prism.apollo
+
+import org.junit.Test
+import kotlin.test.assertTrue
+
+class PlatformTests {
+    @Test
+    fun testOS() {
+        assertTrue(Platform.OS.contains("Android"))
+    }
+}

apollo/src/appleMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt

@@ -25,7 +25,7 @@ actual class KMMX25519PrivateKey(val raw: ByteArray) {
      * @throws RuntimeException if there is an error generating the public key.
      */
     @Throws(RuntimeException::class)
-    public fun publicKey(): KMMX25519PublicKey {
+    public actual fun publicKey(): KMMX25519PublicKey {
         val result = X25519.publicKeyWithPrivateKey(raw.toNSData())
         result.failure()?.let { throw RuntimeException(it.localizedDescription()) }
         val publicRaw = result.success()?.toByteArray() ?: throw RuntimeException("Null result")

apollo/src/commonMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt

@@ -3,4 +3,11 @@ package io.iohk.atala.prism.apollo.utils
 /**
  * Definition of the KMMX25519PrivateKey functionality
  */
-expect class KMMX25519PrivateKey
+expect class KMMX25519PrivateKey {
+    /**
+     * Generates a public key from the given private key.
+     *
+     * @return The generated public key.
+     */
+    fun publicKey(): KMMX25519PublicKey
+}

apollo/src/commonTest/kotlin/io/iohk/atala/prism/apollo/base64/Base64Tests.kt

@@ -3,6 +3,7 @@ package io.iohk.atala.prism.apollo.base64
 import kotlin.test.Test
 import kotlin.test.assertContentEquals
 import kotlin.test.assertEquals
+import kotlin.test.assertTrue
 
 class Base64Tests {
     // Extension
@@ -191,4 +192,78 @@ class Base64Tests {
     fun testEncodeBase16RFC_4648_6() {
         assertEquals("Zm9vYmFy", "foobar".base64PadEncoded)
     }
+
+    @Test
+    fun testStringBase64Encoded() {
+        assertEquals("aGVsbG8", "hello".base64Encoded)
+    }
+
+    @Test
+    fun testStringBase64Decoded() {
+        assertEquals("hello", "aGVsbG8".base64Decoded)
+    }
+
+    @Test
+    fun testStringBase64UrlPadEncoded() {
+        assertEquals("aGVsbG8=", "hello".base64UrlPadEncoded)
+    }
+
+    @Test
+    fun testByteArrayBase64Encoded() {
+        assertEquals(
+            "SGVsbG8gd29ybGQh",
+            "Hello world!".encodeToByteArray().base64Encoded
+        )
+    }
+
+    @Test
+    fun testByteArrayBase64Decoded() {
+        assertEquals(
+            "Hello world!",
+            "SGVsbG8gd29ybGQh".encodeToByteArray().base64Decoded
+        )
+    }
+
+    @Test
+    fun testByteArrayBase64PadDecoded() {
+        assertEquals(
+            "Hello world!",
+            "SGVsbG8gd29ybGQh".encodeToByteArray().base64PadDecoded
+        )
+    }
+
+    @Test
+    fun testByteArrayBase64UrlDecoded() {
+        assertEquals(
+            "Hello, world!",
+            "SGVsbG8sIHdvcmxkIQ==".encodeToByteArray().base64UrlDecoded
+        )
+    }
+
+    @Test
+    fun testByteArrayBase64UrlPadEncoded() {
+        assertEquals(
+            "aGVsbG8=",
+            "hello".encodeToByteArray().base64UrlPadEncoded
+        )
+    }
+
+    @Test
+    fun asCharArrayShouldReturnEmptyCharArrayForEmptyByteArray() {
+        val byteArray: ByteArray = byteArrayOf()
+        val charArray = byteArray.asCharArray()
+
+        assertEquals(0, charArray.size)
+    }
+
+    @Test
+    fun asCharArrayShouldReturnCorrectCharArrayForVariousByteArray() {
+        val byteArray: ByteArray = byteArrayOf(72, 101, 108, 108, 111) // ASCII values for "Hello"
+        val charArray = byteArray.asCharArray()
+        val expectedCharArray: CharArray = charArrayOf('H', 'e', 'l', 'l', 'o')
+
+        assertTrue {
+            charArray contentEquals expectedCharArray
+        }
+    }
 }

apollo/src/commonTest/kotlin/io/iohk/atala/prism/apollo/derivation/BigIntegerWrapperTests.kt

@@ -0,0 +1,71 @@
+package io.iohk.atala.prism.apollo.derivation
+
+import com.ionspin.kotlin.bignum.integer.toBigInteger
+import kotlin.random.Random
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNotEquals
+
+class BigIntegerWrapperTests {
+    @Test
+    fun initFromIntShouldInitializeValueCorrectly() {
+        val intVal = Random.nextInt()
+        val bigIntegerWrapper = BigIntegerWrapper(intVal)
+        assertEquals(intVal.toBigInteger(), bigIntegerWrapper.value)
+    }
+
+    @Test
+    fun initFromLongShouldInitializeValueCorrectly() {
+        val longVal = Random.nextLong()
+        val bigIntegerWrapper = BigIntegerWrapper(longVal)
+        assertEquals(longVal.toBigInteger(), bigIntegerWrapper.value)
+    }
+
+    @Test
+    fun initFromShortShouldInitializeValueCorrectly() {
+        val shortVal = Random.nextInt(Short.MIN_VALUE.toInt(), Short.MAX_VALUE.toInt()).toShort()
+        val bigIntegerWrapper = BigIntegerWrapper(shortVal)
+        assertEquals(shortVal.toInt().toBigInteger(), bigIntegerWrapper.value)
+    }
+
+    @Test
+    fun initFromByteShouldInitializeValueCorrectly() {
+        val byteVal = Random.nextInt(Byte.MIN_VALUE.toInt(), Byte.MAX_VALUE.toInt()).toByte()
+        val bigIntegerWrapper = BigIntegerWrapper(byteVal)
+        assertEquals(byteVal.toInt().toBigInteger(), bigIntegerWrapper.value)
+    }
+
+    @Test
+    fun initFromStringShouldInitializeValueCorrectly() {
+        val strVal = Random.nextLong().toString()
+        val bigIntegerWrapper = BigIntegerWrapper(strVal)
+        assertEquals(strVal.toBigInteger(), bigIntegerWrapper.value)
+    }
+
+    @Test
+    fun initFromBigIntegerShouldInitializeValueCorrectly() {
+        val bigIntVal = Random.nextLong().toBigInteger()
+        val bigIntegerWrapper = BigIntegerWrapper(bigIntVal)
+        assertEquals(bigIntVal, bigIntegerWrapper.value)
+    }
+
+    @Test
+    fun equalsShouldReturnTrueForSameObjectAndFalseForDifferentObject() {
+        val bigIntegerWrapper1 = BigIntegerWrapper(Random.nextInt())
+        val bigIntegerWrapper2 = BigIntegerWrapper(bigIntegerWrapper1.value)
+        val bigIntegerWrapper3 = BigIntegerWrapper(Random.nextInt())
+
+        assertEquals(bigIntegerWrapper1, bigIntegerWrapper2)
+        assertNotEquals(bigIntegerWrapper1, bigIntegerWrapper3)
+    }
+
+    @Test
+    fun hashCodeShouldReturnSameValueForSameObjectAndDifferentValueForDifferentObject() {
+        val bigIntegerWrapper1 = BigIntegerWrapper(Random.nextInt())
+        val bigIntegerWrapper2 = BigIntegerWrapper(bigIntegerWrapper1.value)
+        val bigIntegerWrapper3 = BigIntegerWrapper(Random.nextInt())
+
+        assertEquals(bigIntegerWrapper1.hashCode(), bigIntegerWrapper2.hashCode())
+        assertNotEquals(bigIntegerWrapper1.hashCode(), bigIntegerWrapper3.hashCode())
+    }
+}

apollo/src/commonTest/kotlin/io/iohk/atala/prism/apollo/derivation/DerivationAxisTests.kt

@@ -0,0 +1,81 @@
+package io.iohk.atala.prism.apollo.derivation
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.assertFalse
+import kotlin.test.assertNotEquals
+import kotlin.test.assertTrue
+
+class DerivationAxisTests {
+    @Test
+    fun hardenedShouldInitializeCorrectly() {
+        val num = 15 // Just an arbitrary number for testing
+
+        val hardenedDerivationAxis = DerivationAxis.hardened(num)
+
+        assertEquals(num or (1 shl 31), hardenedDerivationAxis.i)
+        assertTrue(hardenedDerivationAxis.hardened)
+        assertEquals(num, hardenedDerivationAxis.number)
+    }
+
+    @Test
+    fun hardenedShouldFailOnNegativeInput() {
+        val num = -10
+        assertFailsWith(IllegalArgumentException::class) {
+            DerivationAxis.hardened(num)
+        }
+    }
+
+    @Test
+    fun normalShouldInitializeCorrectly() {
+        val num = 20 // Just an arbitrary number for testing
+
+        val normalDerivationAxis = DerivationAxis.normal(num)
+
+        assertEquals(num, normalDerivationAxis.i)
+        assertFalse(normalDerivationAxis.hardened)
+        assertEquals(num, normalDerivationAxis.number)
+    }
+
+    @Test
+    fun normalShouldFailOnNegativeInput() {
+        val num = -10
+        assertFailsWith(IllegalArgumentException::class) {
+            DerivationAxis.hardened(num)
+        }
+    }
+
+    @Test
+    fun toStringShouldRenderCorrectly() {
+        val num = 25
+
+        val hardened = DerivationAxis.hardened(num)
+        val normal = DerivationAxis.normal(num)
+
+        assertEquals("$num'", hardened.toString())
+        assertEquals(num.toString(), normal.toString())
+    }
+
+    @Test
+    fun hashCodeShouldCalculateCorrectly() {
+        val num = 30
+        val derivationAxis = DerivationAxis.normal(num)
+
+        assertEquals(num.hashCode(), derivationAxis.hashCode())
+    }
+
+    @Test
+    fun equalsShouldWorkCorrectly() {
+        val num1 = 35
+        val num2 = 36
+
+        val axis1 = DerivationAxis.normal(num1)
+        val axisHardened1 = DerivationAxis.hardened(num2)
+        val axis2 = DerivationAxis.normal(num2)
+
+        assertEquals(axis1, axis1)
+        assertNotEquals(axis1, axisHardened1)
+        assertNotEquals(axis1, axis2)
+    }
+}

apollo/src/commonTest/kotlin/io/iohk/atala/prism/apollo/derivation/DerivationPathTests.kt

@@ -0,0 +1,59 @@
+package io.iohk.atala.prism.apollo.derivation
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.assertTrue
+
+class DerivationPathTests {
+
+    @Test
+    fun deriveShouldReturnNewDerivationPathWithAddedAxis() {
+        val path = DerivationPath.empty()
+        val axis = DerivationAxis.normal(1)
+
+        val derivedPath = path.derive(axis)
+
+        assertEquals(path.axes + axis, derivedPath.axes)
+    }
+
+    @Test
+    fun emptyShouldReturnNewDerivationPathWithNoAxes() {
+        val path = DerivationPath.empty()
+
+        assertTrue(path.axes.isEmpty())
+    }
+
+    @Test
+    fun toStringShouldReturnCorrectStringRepresentation() {
+        val axes = listOf(DerivationAxis.normal(1), DerivationAxis.hardened(2))
+        val path = DerivationPath(axes)
+
+        assertEquals("m/1/2'", path.toString())
+    }
+
+    @Test
+    fun fromPathShouldParseStringAndReturnCorrespondingDerivationPath() {
+        val pathStr = "m/1/2'"
+        val path = DerivationPath.fromPath(pathStr)
+
+        assertEquals(listOf(DerivationAxis.normal(1), DerivationAxis.hardened(2)), path.axes)
+    }
+
+    @Test
+    fun fromPathShouldThrowExceptionOnIncorrectFormat() {
+        val pathStr = "m'/1/2"
+
+        assertFailsWith(IllegalArgumentException::class) {
+            DerivationPath.fromPath(pathStr)
+        }
+    }
+
+    @Test
+    fun fromPathShouldThrowExceptionOnNegativeOrNonIntegerInput() {
+        val pathStr = "m/-1/1.5"
+        assertFailsWith(IllegalArgumentException::class) {
+            DerivationPath.fromPath(pathStr)
+        }
+    }
+}