fix(core): explicitly serialise File due to upstream issue

buildSrc/src/main/kotlin/Versions.kt

@@ -23,7 +23,7 @@ object Versions {
     val espressoRules = "1.0.1"
     val espressoRunner = "1.0.1"
     val junit = "4.12"
-    val gson = "2.8.7"
+    val gson = "2.8.8"
     val apacheCommonsText = "1.9"
     val apacheCommonsIO = "2.9.0"
     val influxDbClient = "2.21"

core/src/main/kotlin/com/malinskiy/marathon/Marathon.kt

@@ -86,6 +86,8 @@ class Marathon(
         configureLogging(configuration.vendorConfiguration)
         trackAnalytics(configuration)
 
+        logSystemInformation()
+
         val testParser = loadTestParser(configuration.vendorConfiguration)
         val deviceProvider = loadDeviceProvider(configuration.vendorConfiguration)
         val testBundleIdentifier = loadTestBundleIdentifier(configuration.vendorConfiguration)
@@ -131,6 +133,16 @@ class Marathon(
         return progressReporter.aggregateResult()
     }
 
+    private fun logSystemInformation() {
+        log.info { "System Information:" }
+
+        val properties = System.getProperties()
+        val systemProperties = properties.filterKeys { it.toString().startsWith("java") || it.toString().startsWith("os") }
+        systemProperties.forEach {
+            log.info { "${it.key}: ${it.value}" }
+        }
+    }
+
     private fun installShutdownHook(block: suspend () -> Unit): ShutdownHook {
         val shutdownHook = ShutdownHook(configuration) {
             runBlocking {

core/src/main/kotlin/com/malinskiy/marathon/di/Modules.kt

@@ -1,18 +1,20 @@
 package com.malinskiy.marathon.di
 
-import com.google.gson.Gson
+import com.google.gson.GsonBuilder
 import com.malinskiy.marathon.Marathon
 import com.malinskiy.marathon.analytics.TrackerFactory
 import com.malinskiy.marathon.analytics.external.AnalyticsFactory
 import com.malinskiy.marathon.analytics.internal.pub.Track
 import com.malinskiy.marathon.execution.Configuration
 import com.malinskiy.marathon.execution.progress.ProgressReporter
 import com.malinskiy.marathon.io.FileManager
+import com.malinskiy.marathon.json.FileSerializer
 import com.malinskiy.marathon.time.SystemTimer
 import com.malinskiy.marathon.time.Timer
 import org.koin.core.KoinApplication
 import org.koin.core.context.startKoin
 import org.koin.dsl.module
+import java.io.File
 import java.time.Clock
 
 val analyticsModule = module {
@@ -23,7 +25,11 @@ val analyticsModule = module {
 
 val coreModule = module {
     single { FileManager(get<Configuration>().outputDir) }
-    single { Gson() }
+    single {
+        GsonBuilder()
+            .registerTypeAdapter(File::class.java, FileSerializer())
+            .create()
+    }
     single<Clock> { Clock.systemDefaultZone() }
     single<Timer> { SystemTimer(get()) }
     single { ProgressReporter(get()) }

core/src/main/kotlin/com/malinskiy/marathon/json/FileSerializer.kt

@@ -0,0 +1,14 @@
+package com.malinskiy.marathon.json
+
+import com.google.gson.JsonElement
+import com.google.gson.JsonPrimitive
+import com.google.gson.JsonSerializationContext
+import com.google.gson.JsonSerializer
+import java.io.File
+import java.lang.reflect.Type
+
+internal class FileSerializer : JsonSerializer<File> {
+    override fun serialize(src: File, typeOfSrc: Type?, context: JsonSerializationContext?): JsonElement {
+        return JsonPrimitive(src.absolutePath)
+    }
+}