Ignore checks result when an empty checks selection is saved

lib/trento/domain/host/host.ex

@@ -389,17 +389,20 @@ defmodule Trento.Domain.Host do
   end
 
   def execute(
-        %Host{
-          host_id: host_id
-        },
+        %Host{} = host,
         %SelectHostChecks{
           checks: selected_checks
         }
       ) do
-    %HostChecksSelected{
-      host_id: host_id,
-      checks: selected_checks
-    }
+    host
+    |> Multi.new()
+    |> Multi.execute(
+      &%HostChecksSelected{
+        host_id: &1.host_id,
+        checks: selected_checks
+      }
+    )
+    |> Multi.execute(&maybe_emit_host_health_changed_event/1)
   end
 
   def execute(

test/trento/domain/host/host_test.exs

@@ -376,6 +376,55 @@ defmodule Trento.HostTest do
         )
       end
     end
+
+    test "should ignore checks health when an empty checks selection is saved" do
+      host_id = Faker.UUID.v4()
+      host_registered_event = build(:host_registered_event, host_id: host_id)
+      heartbeat_succeded_event = build(:heartbeat_succeded, host_id: host_id)
+
+      checks_selected_event = %HostChecksSelected{
+        host_id: host_id,
+        checks: [Faker.UUID.v4()]
+      }
+
+      host_checks_health_changed_event =
+        build(:host_checks_health_changed,
+          host_id: host_id,
+          checks_health: Health.warning()
+        )
+
+      host_health_changed_event =
+        build(:host_health_changed_event, host_id: host_id, health: Health.warning())
+
+      assert_events_and_state(
+        [
+          host_registered_event,
+          heartbeat_succeded_event,
+          checks_selected_event,
+          host_checks_health_changed_event,
+          host_health_changed_event
+        ],
+        SelectHostChecks.new!(%{
+          host_id: host_id,
+          checks: []
+        }),
+        [
+          %HostChecksSelected{
+            host_id: host_id,
+            checks: []
+          },
+          %HostHealthChanged{host_id: host_id, health: Health.passing()}
+        ],
+        fn host ->
+          assert %Host{
+                   heartbeat: Health.passing(),
+                   selected_checks: [],
+                   checks_health: Health.warning(),
+                   health: Health.passing()
+                 } = host
+        end
+      )
+    end
   end
 
   describe "heartbeat" do