Add test for parsing session update

to validate PR #76

Author: ligi

lib/src/main/kotlin/org/walletconnect/impls/MoshiPayloadAdapter.kt

@@ -93,7 +93,7 @@ class MoshiPayloadAdapter(moshi: Moshi) : Session.PayloadAdapter {
     /**
      * Convert FROM request bytes
      */
-    private fun ByteArray.toMethodCall(): Session.MethodCall =
+    fun ByteArray.toMethodCall(): Session.MethodCall =
         String(this).let { json ->
             mapAdapter.fromJson(json)?.let {
                 try {

lib/src/test/java/org/walletconnect/TheWCSession.kt

@@ -0,0 +1,26 @@
+package org.walletconnect
+
+import com.squareup.moshi.Moshi
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.walletconnect.impls.MoshiPayloadAdapter
+
+
+class TheWCSession {
+
+    @Test
+    fun canParseSessionUpdate() {
+        val adapter = MoshiPayloadAdapter(Moshi.Builder().build())
+        with(adapter) {
+            val json = """{"id":23,"result":{},"method":"wc_sessionUpdate","params":[{"approved":true,"chainId":420}]}"""
+            val tested = json.toByteArray().toMethodCall()
+            assertThat(tested).isInstanceOf(Session.MethodCall.SessionUpdate::class.java)
+            assertThat(tested.id()).isEqualTo(42)
+            val testedAndTyped = tested as Session.MethodCall.SessionUpdate
+            assertThat(testedAndTyped.params.chainId).isEqualTo(420)
+            assertThat(testedAndTyped.params.approved).isTrue
+        }
+
+    }
+}
+