[display] Test on_page_change with each from and to combination (#20457)

tests/components/display/common-page-change.yaml

@@ -0,0 +1,26 @@
+display:
+  - platform: ssd1306_i2c
+    i2c_id: i2c_bus
+    model: SSD1306_128X64
+    reset_pin: ${reset_pin}
+    id: display_page_change_display
+    pages:
+      - id: display_page_change_page1
+        lambda: |-
+          it.rectangle(0, 0, it.get_width(), it.get_height());
+      - id: display_page_change_page2
+        lambda: |-
+          it.rectangle(0, 0, 10, 10);
+    on_page_change:
+      - then:
+          lambda: 'ESP_LOGD("display", "any change, %p %p", from, to);'
+      - from: display_page_change_page1
+        then:
+          lambda: 'ESP_LOGD("display", "left page 1, %p %p", from, to);'
+      - to: display_page_change_page1
+        then:
+          lambda: 'ESP_LOGD("display", "entered page 1, %p %p", from, to);'
+      - from: display_page_change_page1
+        to: display_page_change_page2
+        then:
+          lambda: 'ESP_LOGD("display", "1 -> 2, %p %p", from, to);'

tests/components/display/test-page-change.esp32-idf.yaml

@@ -0,0 +1,6 @@
+substitutions:
+  reset_pin: GPIO15
+
+packages:
+  i2c: !include ../../test_build_components/common/i2c/esp32-idf.yaml
+  display: !include common-page-change.yaml