fix(extron\usb_extender_plus\virtual_switcher): add spec

drivers/extron/usb_extender_plus/virtual_switcher.cr

@@ -12,8 +12,8 @@ class Extron::UsbExtenderPlus::VirtualSwitcher < PlaceOS::Driver
   generic_name :USB_Switcher
   descriptive_name "Extron USB Extender Plus Switcher"
 
-  accessor hosts : Array(USB_Host), implementing: InputSelection
-  accessor devices : Array(USB_Device), implementing: InputSelection
+  accessor hosts : Array(USB_Host)
+  accessor devices : Array(USB_Device)
 
   getter host_macs : Hash(String, Int32) do
     hash = {} of String => Int32
@@ -46,6 +46,7 @@ class Extron::UsbExtenderPlus::VirtualSwitcher < PlaceOS::Driver
       host_mac = host.status(String, :mac_address)
 
       unjoin_all_devices
+      unjoin_all_hosts
       devices.each { |device| perform_join(host, device) }
     end
   end

drivers/extron/usb_extender_plus/virtual_switcher_spec.cr

@@ -1,4 +1,80 @@
 require "placeos-driver/spec"
+require "random"
 
 DriverSpecs.mock_driver "Extron::UsbExtenderPlus::VirtualSwitcher" do
+  system({
+    USB_Host:   {EndpointMock, EndpointMock},
+    USB_Device: {EndpointMock, EndpointMock},
+  })
+
+  exec(:switch_to, 1).get
+
+  host1_mac = system(:USB_Host_1)["mac_address"].as_s
+  host2_mac = system(:USB_Host_2)["mac_address"].as_s
+  dev1_mac = system(:USB_Device_1)["mac_address"].as_s
+  dev2_mac = system(:USB_Device_2)["mac_address"].as_s
+
+  system(:USB_Device_1)["joined_to"].should eq [host1_mac]
+  system(:USB_Device_2)["joined_to"].should eq [host1_mac]
+  system(:USB_Host_1)["joined_to"].should eq [dev1_mac, dev2_mac]
+  system(:USB_Host_2)["joined_to"].should eq [] of String
+
+  exec(:switch_to, 2).get
+  system(:USB_Device_1)["joined_to"].should eq [host2_mac]
+  system(:USB_Device_2)["joined_to"].should eq [host2_mac]
+  system(:USB_Host_1)["joined_to"].should eq [] of String
+  system(:USB_Host_2)["joined_to"].should eq [dev1_mac, dev2_mac]
+
+  exec(:switch, {1 => [2]}).get
+  sleep 0.1
+  system(:USB_Device_1)["joined_to"].should eq [host2_mac]
+  system(:USB_Device_2)["joined_to"].should eq [host1_mac]
+  system(:USB_Host_1)["joined_to"].should eq [dev2_mac]
+  system(:USB_Host_2)["joined_to"].should eq [dev1_mac]
+
+  exec(:switch, {1 => [1], 2 => [2]}).get
+  sleep 0.1
+  system(:USB_Device_1)["joined_to"].should eq [host1_mac]
+  system(:USB_Device_2)["joined_to"].should eq [host2_mac]
+  system(:USB_Host_1)["joined_to"].should eq [dev1_mac]
+  system(:USB_Host_2)["joined_to"].should eq [dev2_mac]
+end
+
+# :nodoc:
+class EndpointMock < DriverSpecs::MockDriver
+  @joined_to : Array(String) = [] of String
+
+  def on_load
+    self[:mac_address] = Random::Secure.hex(6).downcase
+    self[:joined_to] = [] of String
+  end
+
+  def query_joins
+    @joined_to
+  end
+
+  def unjoin_all
+    self[:joined_to] = @joined_to = [] of String
+  end
+
+  def unjoin(from : String | Int32)
+    mac = case from
+          in Int32
+            @joined_to[from]
+          in String
+            formatted = from.gsub(/\-|\:/, "").downcase
+            formatted if @joined_to.includes? formatted
+          end
+
+    if mac
+      @joined_to.delete(mac)
+      self[:joined_to] = @joined_to
+    end
+  end
+
+  def join(mac : String)
+    mac = mac.gsub(/\-|\:/, "").downcase
+    @joined_to << mac
+    self[:joined_to] = @joined_to
+  end
 end