[climate_ir] Only advertise HEAT_COOL when heat and cool are both supported (#19483)

tests/components/climate_ir/__init__.py

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+from tests.testing_helpers import ComponentManifestOverride
+
+
+def override_manifest(manifest: ComponentManifestOverride) -> None:
+    # ClimateIR derives from climate::Climate without declaring it as a dependency.
+    manifest.dependencies = manifest.dependencies + ["climate"]

tests/components/climate_ir/climate_ir_test.cpp

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+#include <gtest/gtest.h>
+#include "esphome/components/climate_ir/climate_ir.h"
+
+namespace esphome::climate_ir::testing {
+
+class TestClimateIR : public ClimateIR {
+ public:
+  TestClimateIR() : ClimateIR(16.0f, 30.0f) {}
+
+  using ClimateIR::traits;
+
+ protected:
+  void transmit_state() override {}
+};
+
+// The HEAT_COOL default is covered in tests/component_tests/climate_ir.
+
+TEST(ClimateIRTest, HeatCoolAdvertisedWhenSupported) {
+  TestClimateIR climate;
+  climate.set_supports_heat(true);
+  climate.set_supports_cool(true);
+  climate.set_supports_heat_cool(true);
+  EXPECT_TRUE(climate.traits().supports_mode(climate::CLIMATE_MODE_HEAT_COOL));
+}
+
+TEST(ClimateIRTest, HeatCoolNotAdvertisedWhenUnsupported) {
+  TestClimateIR climate;
+  climate.set_supports_heat(true);
+  climate.set_supports_cool(true);
+  climate.set_supports_heat_cool(false);
+  EXPECT_FALSE(climate.traits().supports_mode(climate::CLIMATE_MODE_HEAT_COOL));
+}
+
+TEST(ClimateIRTest, HeatCoolAdvertisedForCoolOnlyDeviceThatSupportsIt) {
+  TestClimateIR climate;
+  climate.set_supports_heat(false);
+  climate.set_supports_cool(true);
+  climate.set_supports_heat_cool(true);
+  auto traits = climate.traits();
+  EXPECT_TRUE(traits.supports_mode(climate::CLIMATE_MODE_HEAT_COOL));
+  EXPECT_FALSE(traits.supports_mode(climate::CLIMATE_MODE_HEAT));
+}
+
+TEST(ClimateIRTest, HeatAndCoolModesFollowTheirOwnFlags) {
+  TestClimateIR climate;
+  climate.set_supports_heat(false);
+  climate.set_supports_cool(true);
+  climate.set_supports_heat_cool(false);
+  auto traits = climate.traits();
+  EXPECT_TRUE(traits.supports_mode(climate::CLIMATE_MODE_COOL));
+  EXPECT_FALSE(traits.supports_mode(climate::CLIMATE_MODE_HEAT));
+  EXPECT_FALSE(traits.supports_mode(climate::CLIMATE_MODE_HEAT_COOL));
+  EXPECT_TRUE(traits.supports_mode(climate::CLIMATE_MODE_OFF));
+}
+
+}  // namespace esphome::climate_ir::testing

tests/components/gree/validate-cool-only-heat-cool.esp32-idf.yaml

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+packages:
+  remote_transmitter: !include ../../test_build_components/common/remote_transmitter/esp32-idf.yaml
+
+climate:
+  - platform: gree
+    name: GREE
+    transmitter_id: xmitr
+    model: YAN
+    supports_heat: false
+    supports_heat_cool: true

tests/components/gree/validate-no-cool.esp32-idf.yaml

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+packages:
+  remote_transmitter: !include ../../test_build_components/common/remote_transmitter/esp32-idf.yaml
+
+climate:
+  - platform: gree
+    name: GREE
+    transmitter_id: xmitr
+    model: YAN
+    supports_cool: false

tests/components/gree/validate-no-heat-cool.esp32-idf.yaml

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+packages:
+  remote_transmitter: !include ../../test_build_components/common/remote_transmitter/esp32-idf.yaml
+
+climate:
+  - platform: gree
+    name: GREE
+    transmitter_id: xmitr
+    model: YAN
+    supports_heat_cool: false

tests/components/gree/validate-no-heat.esp32-idf.yaml

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+packages:
+  remote_transmitter: !include ../../test_build_components/common/remote_transmitter/esp32-idf.yaml
+
+climate:
+  - platform: gree
+    name: GREE
+    transmitter_id: xmitr
+    model: YAN
+    supports_heat: false