test: fix unused / uninitialized warnings

Author: mcspr

code/espurna/scheduler_common.ipp

@@ -916,7 +916,7 @@ constexpr auto DefaultSeconds = datetime::Seconds{ -1 };
 using time_point = datetime::Clock::time_point;
 constexpr auto DefaultTimePoint = time_point{ DefaultSeconds };
 
-time_point make_time_point(const datetime::Context& ctx) {
+inline time_point make_time_point(const datetime::Context& ctx) {
     return time_point(to_minutes(ctx));
 }
 

code/espurna/sensors/DHTSensor.h

@@ -77,6 +77,9 @@ float dht_humidity(DHTChipType type, std::array<uint8_t, 2> pair) {
     case DHT_CHIP_SI7021:
         out = ((pair[0] << 8) | pair[1]) * 0.1f;
         break;
+
+    default:
+        __builtin_unreachable();
     }
 
     return out;
@@ -155,6 +158,9 @@ float dht_temperature(DHTChipType type, std::array<uint8_t, 2> pair) {
 
         out *= 0.1f;
         break;
+
+    default:
+        __builtin_unreachable();
     }
 
     return out;

code/test/unit/src/sensor/sensor.cpp

@@ -200,9 +200,6 @@ void test_a02yyu_data() {
 }
 
 void test_dht_data() {
-    constexpr auto a = 0b00011010;
-    constexpr auto b = 0b10000110;
-
     TEST_ASSERT_EQUAL_FLOAT(56.8f,
         dht_humidity(DHT_CHIP_DHT12, {0x38, 0x8}));
     TEST_ASSERT_EQUAL_FLOAT(26.6f,