[sendspin] Add the dynamic pairing code (#20349)

tests/components/sendspin/common-hub.yaml

@@ -7,6 +7,9 @@ sendspin:
   manufacturer: Test Manufacturer
   model: Test Model
   firmware_version: 1.2.3
+  # No static_pairing_code here: the on_display_pairing_code automation below makes
+  # this a dynamic-pairing-code device, and validation rejects both together.
+  # common-pairing.yaml covers the static-code build.
   on_open_pairing_window:
     then:
       - logger.log: "Pairing window requested"
@@ -16,6 +19,14 @@ sendspin:
     then:
       - logger.log: "Pairing window prompt dismissed"
       - sendspin.cancel_pairing_window:
+  on_display_pairing_code:
+    then:
+      - logger.log:
+          format: "Pairing code: %s"
+          args: ["code.c_str()"]
+  on_clear_pairing_code:
+    then:
+      - logger.log: "Pairing code cleared"
   on_pairing_succeeded:
     then:
       - logger.log:

tests/components/sendspin/common-text_sensor-pairing.yaml

@@ -0,0 +1,17 @@
+# The pairing code text sensor on its own, with no metadata text sensor to pull in the
+# metadata role. This is the build where USE_SENDSPIN_METADATA is undefined while the text
+# sensor platform is still compiled, which is guarded separately in sendspin_text_sensor.{h,cpp}.
+#
+# Deliberately does not include common.yaml: that file pulls in the shared hub package, and
+# the point here is the narrower configuration. sendspin depends on network, so the interface
+# has to be declared locally instead.
+wifi:
+  ap:
+
+sendspin:
+  id: sendspin_hub_id
+
+text_sensor:
+  - platform: sendspin
+    name: "Pairing Code"
+    type: pairing_code

tests/components/sendspin/common-text_sensor.yaml

@@ -14,3 +14,7 @@ text_sensor:
   - platform: sendspin
     name: "Album Artist"
     type: album_artist
+  - platform: sendspin
+    name: "Pairing Code"
+    type: pairing_code
+    entity_category: diagnostic

tests/components/sendspin/test-text_sensor-pairing.esp32-idf.yaml

@@ -0,0 +1,2 @@
+packages:
+  sendspin: !include common-text_sensor-pairing.yaml