[wifi] Skip setters that pass the default priority, timeouts, power save and auth mode (#19229)

tests/component_tests/wifi/config/bare.yaml

@@ -0,0 +1,12 @@
+---
+esphome:
+  name: test
+
+esp8266:
+  board: d1_mini
+
+wifi:
+  ssid: test
+  password: testtest
+  ap:
+    ssid: fallback

tests/component_tests/wifi/config/custom.yaml

@@ -0,0 +1,18 @@
+---
+esphome:
+  name: test
+
+esp8266:
+  board: d1_mini
+
+wifi:
+  networks:
+    - ssid: test
+      password: testtest
+      priority: 5
+  ap:
+    ssid: fallback
+    ap_timeout: 2min
+  reboot_timeout: 0s
+  power_save_mode: light
+  min_auth_mode: wpa

tests/component_tests/wifi/config/defaults.yaml

@@ -0,0 +1,18 @@
+---
+esphome:
+  name: test
+
+esp8266:
+  board: d1_mini
+
+wifi:
+  networks:
+    - ssid: test
+      password: testtest
+      priority: 0
+  ap:
+    ssid: fallback
+    ap_timeout: 90s
+  reboot_timeout: 15min
+  power_save_mode: none
+  min_auth_mode: wpa2

tests/component_tests/wifi/test_default_setters.py

@@ -0,0 +1,39 @@
+"""Tests that wifi codegen skips setters for default values."""
+
+from collections.abc import Callable
+from pathlib import Path
+
+import pytest
+
+
+@pytest.mark.parametrize("config_file", ["bare.yaml", "defaults.yaml"])
+def test_default_values_are_not_emitted(
+    generate_main: Callable[[str | Path], str],
+    component_config_path: Callable[[str], Path],
+    config_file: str,
+) -> None:
+    """Priority 0, 90 s AP timeout, 15 min reboot, power save none, WPA2 are C++ defaults.
+
+    Both the schema defaults and the same values written explicitly take the skip path.
+    """
+    main_cpp = generate_main(component_config_path(config_file))
+
+    assert "set_priority(" not in main_cpp
+    assert "set_ap_timeout(" not in main_cpp
+    assert "set_reboot_timeout(" not in main_cpp
+    assert "set_power_save_mode(" not in main_cpp
+    assert "set_min_auth_mode(" not in main_cpp
+
+
+def test_custom_values_are_emitted(
+    generate_main: Callable[[str | Path], str],
+    component_config_path: Callable[[str], Path],
+) -> None:
+    """Non default values still reach the C++ setters."""
+    main_cpp = generate_main(component_config_path("custom.yaml"))
+
+    assert "set_priority(5);" in main_cpp
+    assert "set_ap_timeout(120000);" in main_cpp
+    assert "set_reboot_timeout(0);" in main_cpp
+    assert "set_power_save_mode(wifi::WIFI_POWER_SAVE_LIGHT);" in main_cpp
+    assert "set_min_auth_mode(wifi::WIFI_MIN_AUTH_MODE_WPA);" in main_cpp