Add some tests for encoding/decoding

xodus-serialization/src/main/kotlin/ru/mipt/npm/xodus/serialization/json/encoder.kt

@@ -16,6 +16,7 @@ internal fun StoreTransaction.encodeToEntity(jsonElement: JsonElement, entity: E
             jsonElement.forEach { entry ->
                 entry.value.let { value ->
                     when(value) {
+                        // не сможем десериализовать, если JsonNull (надо ли обрабатывать???) (можно сохранить в отдельный список ключи null-ов)
                         is JsonPrimitive -> {
                             if (value.isString) {
                                 entity.setProperty(entry.key, value.content)
@@ -30,6 +31,7 @@ internal fun StoreTransaction.encodeToEntity(jsonElement: JsonElement, entity: E
                         }
 
                         // считаем, что все элементы массива - JsonObject, иначе не можем напрямую сериализовать (надо придывать костыли???)
+                        // не сможем десериализовать, если массив пустой (надо ли обрабатывать???) (можно сохранять в отдельный список ключи пустых массивов)
                         is JsonArray -> {
                             value.forEach { element ->
                                 val childEntity = newEntity("${entity.type}.${entry.key}")

xodus-serialization/src/main/kotlin/ru/mipt/npm/xodus/serialization/json/main.kt

@@ -24,8 +24,7 @@ internal fun main() {
             Name.parse("magix-virtual-car"),
             time = Instant.fromEpochMilliseconds(1337)
         ),
-        "magix-virtual-car",
-        user = JsonObject(content = mapOf(Pair("name", JsonPrimitive("SCADA"))))
+        "magix-virtual-car"
     )
 
     val entityStore = PersistentEntityStores.newInstance(Paths.get(".xodus_serialization").toString())

xodus-serialization/src/test/kotlin/ru/mipt/npm/xodus/serialization/json/EncoderDecoderTests.kt

@@ -0,0 +1,105 @@
+package ru.mipt.npm.xodus.serialization.json
+
+import jetbrains.exodus.entitystore.PersistentEntityStores
+import kotlinx.datetime.Instant
+import kotlinx.serialization.json.*
+import org.junit.jupiter.api.AfterAll
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import ru.mipt.npm.controls.api.PropertyChangedMessage
+import ru.mipt.npm.magix.api.MagixMessage
+import space.kscience.dataforge.meta.Meta
+import space.kscience.dataforge.names.Name
+import java.nio.file.Paths
+import kotlin.test.assertEquals
+
+internal class EncoderDecoderTests {
+    companion object {
+        private val storePath = Paths.get(".xodus_serialization_test")
+        private val entityStore = PersistentEntityStores.newInstance(storePath.toString())
+
+        @AfterAll
+        @JvmStatic
+        fun deleteDatabase() {
+            entityStore.close()
+            storePath.toFile().deleteRecursively()
+        }
+
+        @AfterEach
+        fun clearDatabase() {
+            entityStore.clear()
+        }
+
+        fun checkEncodingDecodingCorrectness(json: JsonObject) {
+            val id = entityStore.encodeToEntity(json, "JsonObject")
+            assertEquals(json, entityStore.decodeFromEntity(id))
+        }
+
+        fun checkEncodingDecodingCorrectness(jsons: List<JsonObject>) = jsons.forEach {
+            checkEncodingDecodingCorrectness(it)
+        }
+
+    }
+
+    @Test
+    fun `encoder throw Illegal exception if input is not a JsonObject`() {
+        assertThrows<IllegalStateException> {
+            val json = JsonPrimitive(0)
+            entityStore.encodeToEntity(json, "JsonPrimitive")
+        }
+
+        assertThrows<IllegalStateException> {
+            val json = buildJsonArray {}
+            entityStore.encodeToEntity(json, "JsonArray")
+        }
+    }
+
+    @Test
+    fun `correctly work with underlying JsonPrimitive`() {
+        val jsonLong = buildJsonObject { put("value", 0) }
+        val jsonDouble = buildJsonObject { put("value", 0.0) }
+        val jsonBoolean = buildJsonObject { put("value", true) }
+        val jsonString = buildJsonObject { put("value", "") }
+
+        checkEncodingDecodingCorrectness(listOf(jsonLong, jsonDouble, jsonBoolean, jsonString))
+    }
+
+    @Test
+    fun `correctly work with underlying JsonArray`() {
+        checkEncodingDecodingCorrectness(buildJsonObject { putJsonArray("value") {
+            add(buildJsonObject { put("value", 0) })
+            add(buildJsonObject { put("value", 0.0) })
+        } })
+    }
+
+    @Test
+    fun `correctly work with underlying JsonObject`() {
+        checkEncodingDecodingCorrectness(buildJsonObject {
+            putJsonObject("value", { put("value", true) })
+        })
+    }
+
+    @Test
+    fun testMagixMessagePropertyChangedMessage() {
+        val expectedMessage = MagixMessage(
+            "dataforge",
+            "dataforge",
+            PropertyChangedMessage(
+                "acceleration",
+                Meta {
+                    "x" put 3.0
+                    "y" put 9.0
+                },
+                Name.parse("virtual-car"),
+                Name.parse("magix-virtual-car"),
+                time = Instant.fromEpochMilliseconds(1337)
+            ),
+            "magix-virtual-car",
+            user = buildJsonObject { put("name", "SCADA") }
+        )
+
+        val id = entityStore.encodeToEntity(expectedMessage, "MagixMessage")
+        assertEquals(expectedMessage, entityStore.decodeFromEntity<MagixMessage<PropertyChangedMessage>>(id))
+    }
+}