fix: make some metrics attributes optional in Gen1 devices for real

pom.xml

@@ -58,6 +58,11 @@
       <artifactId>spring-boot-starter-actuator</artifactId>
     </dependency>
 
+    <dependency>
+      <groupId>com.fasterxml.jackson.module</groupId>
+      <artifactId>jackson-module-kotlin</artifactId>
+    </dependency>
+
     <dependency>
       <groupId>com.github.ben-manes.caffeine</groupId>
       <artifactId>caffeine</artifactId>

src/test/kotlin/click/dobel/shelly/exporter/client/api/gen1/StatusDeserializationIntegrationTest.kt

@@ -0,0 +1,91 @@
+package click.dobel.shelly.exporter.client.api.gen1
+
+import click.dobel.shelly.exporter.test.IntegrationTest
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.kotest.assertions.throwables.shouldNotThrowAny
+import io.kotest.core.spec.style.FreeSpec
+import io.kotest.matchers.shouldBe
+import org.springframework.beans.factory.annotation.Autowired
+
+@IntegrationTest
+class StatusDeserializationIntegrationTest(
+  @Autowired objectMapper: ObjectMapper
+) : FreeSpec({
+
+  val message = """
+    {
+        "wifi_sta": {
+            "connected": true,
+            "ssid": "my-WLAN",
+            "ip": "192.168.0.88",
+            "rssi": -72
+        },
+        "cloud": {
+            "enabled": false,
+            "connected": false
+        },
+        "mqtt": {
+            "connected": true
+        },
+        "time": "12:57",
+        "unixtime": 1716375473,
+        "serial": 1,
+        "has_update": false,
+        "mac": "123456789012",
+        "cfg_changed_cnt": 0,
+        "actions_stats": {
+            "skipped": 0
+        },
+        "relays": [
+            {
+                "ison": false,
+                "has_timer": false,
+                "timer_started": 0,
+                "timer_duration": 0,
+                "timer_remaining": 0,
+                "source": "mqtt"
+            }
+        ],
+        "meters": [
+            {
+                "power": 0,
+                "is_valid": true
+            }
+        ],
+        "inputs": [
+            {
+                "input": 0,
+                "event": "",
+                "event_cnt": 0
+            }
+        ],
+        "ext_sensors": {},
+        "ext_temperature": {},
+        "ext_humidity": {},
+        "update": {
+            "status": "idle",
+            "has_update": false,
+            "new_version": "20230913-112003/v1.14.0-gcb84623",
+            "old_version": "20230913-112003/v1.14.0-gcb84623",
+            "beta_version": "20231107-162940/v1.14.1-rc1-g0617c15"
+        },
+        "ram_total": 51688,
+        "ram_free": 39728,
+        "fs_size": 233681,
+        "fs_free": 150349,
+        "uptime": 8775365
+    }
+  """.trimIndent()
+
+  "Deserializing Status" - {
+
+    // https://github.com/easimon/shelly-exporter/issues/103
+    "Should succeed when the API does not return counters (Issue #103)" {
+      val status = shouldNotThrowAny {
+        objectMapper.readValue(message, Status::class.java)
+      }
+
+      status.meters.first().counters shouldBe emptyList()
+    }
+  }
+})