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esphome/tests/components/light/test_light_call_brightness.cpp
T

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C++

#include <gtest/gtest.h>
#include "esphome/components/light/light_call.h"
#include "esphome/components/light/light_output.h"
#include "esphome/components/light/light_state.h"
namespace esphome::light::testing {
namespace {
// A light that only supports ON_OFF, like the `binary` platform and `status_led`.
class OnOffOutput : public LightOutput {
public:
LightTraits get_traits() override {
LightTraits traits;
traits.set_supported_color_modes({ColorMode::ON_OFF});
return traits;
}
void write_state(LightState *state) override {}
};
// A dimmable light, like the `monochromatic` platform.
class BrightnessOutput : public LightOutput {
public:
LightTraits get_traits() override {
LightTraits traits;
traits.set_supported_color_modes({ColorMode::BRIGHTNESS});
return traits;
}
void write_state(LightState *state) override {}
};
// validate_() is where zero brightness is resolved against the light's capabilities.
class TestableLightCall : public LightCall {
public:
using LightCall::LightCall;
using LightCall::validate_;
};
bool as_binary(const LightColorValues &values) {
bool binary;
values.as_binary(&binary);
return binary;
}
} // namespace
// An ON/OFF light has no "on but dark" state, so a zero brightness -- how effects encode
// their dark phase -- must turn the light off. Regression test for
// https://github.com/esphome/esphome/issues/17873.
TEST(LightCallOnOff, ZeroBrightnessTurnsOutputOff) {
OnOffOutput output;
LightState state(&output);
TestableLightCall call(&state);
call.set_state(true).set_brightness(0.0f);
auto values = call.validate_();
EXPECT_FALSE(as_binary(values));
}
// The zero must not be stored, or no later turn-on could clear it: the capability check in
// validate_() drops any brightness an ON/OFF light doesn't support, so a stored zero would
// leave the light permanently off.
TEST(LightCallOnOff, ZeroBrightnessIsNotStored) {
OnOffOutput output;
LightState state(&output);
TestableLightCall dark_call(&state);
dark_call.set_state(true).set_brightness(0.0f);
state.remote_values = dark_call.validate_();
EXPECT_FLOAT_EQ(state.remote_values.get_brightness(), 1.0f);
// A plain turn-on afterwards must switch the light back on.
TestableLightCall on_call(&state);
on_call.set_state(true);
auto values = on_call.validate_();
EXPECT_TRUE(as_binary(values));
}
// A plain turn-on with no brightness must still light up.
TEST(LightCallOnOff, PlainTurnOnIsVisible) {
OnOffOutput output;
LightState state(&output);
TestableLightCall call(&state);
call.set_state(true);
auto values = call.validate_();
EXPECT_TRUE(as_binary(values));
}
TEST(LightCallOnOff, TurnOffTurnsOutputOff) {
OnOffOutput output;
LightState state(&output);
TestableLightCall call(&state);
call.set_state(false);
auto values = call.validate_();
EXPECT_FALSE(as_binary(values));
}
// A dimmable light can represent "on but dark", so zero brightness must be kept as-is and
// must not be rewritten into a turn-off.
TEST(LightCallBrightness, ZeroBrightnessStaysOnButDark) {
BrightnessOutput output;
LightState state(&output);
TestableLightCall call(&state);
call.set_state(true).set_brightness(0.0f);
auto values = call.validate_();
EXPECT_TRUE(values.is_on());
EXPECT_FLOAT_EQ(values.get_brightness(), 0.0f);
}
} // namespace esphome::light::testing