Fix config loading

http4s/src/main/resources/reference.conf

@@ -1,4 +1,4 @@
-collector {
+{
   paths {}
 
   p3p {

http4s/src/test/resources/test-config.hocon

@@ -0,0 +1,18 @@
+collector {
+  interface = "0.0.0.0"
+  port = 8080
+
+  streams {
+    good = "good"
+    bad = "bad"
+
+    sink {
+      foo = "hello"
+      bar = "world"
+    }
+  }
+
+  ssl {
+    enable = true
+  }
+}

http4s/src/test/scala/com.snowplowanalytics.snowplow.collector.core/ConfigParserSpec.scala

@@ -0,0 +1,40 @@
+package com.snowplowanalytics.snowplow.collector.core
+
+import java.nio.file.Paths
+
+import org.specs2.mutable.Specification
+
+import cats.effect.IO
+
+import cats.effect.testing.specs2.CatsEffect
+
+import io.circe.generic.semiauto._
+
+class ConfigParserSpec extends Specification with CatsEffect {
+
+  "Loading the configuration" should {
+    "use reference.conf and the hocon specified in the path" in {
+      case class SinkConfig(foo: String, bar: String)
+      implicit val decoder = deriveDecoder[SinkConfig]
+
+      val path = Paths.get(getClass.getResource(("/test-config.hocon")).toURI())
+
+      val expectedStreams = Config.Streams[SinkConfig](
+        "good",
+        "bad",
+        TestUtils.testConfig.streams.useIpAddressAsPartitionKey,
+        SinkConfig("hello", "world"),
+        TestUtils.testConfig.streams.buffer
+      )
+      val expected = TestUtils
+        .testConfig
+        .copy[SinkConfig](
+          paths   = Map.empty[String, String],
+          streams = expectedStreams,
+          ssl     = TestUtils.testConfig.ssl.copy(enable = true)
+        )
+
+      ConfigParser.fromPath[IO, SinkConfig](Some(path)).value.map(_ should beRight(expected))
+    }
+  }
+}

http4s/src/test/scala/com.snowplowanalytics.snowplow.collector.core/TestUtils.scala

@@ -102,6 +102,6 @@ object TestUtils {
     ),
     enableDefaultRedirect = false,
     redirectDomains       = Set.empty[String],
-    preTerminationPeriod  = 5.minutes
+    preTerminationPeriod  = 10.seconds
   )
 }