Add some basic tests for the database

test/fixtures/CMakeLists.txt

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+idf_component_register(INCLUDE_DIRS "." REQUIRES drivers)

test/fixtures/i2c_fixture.hpp

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+#pragma once
+
+#include "catch2/catch.hpp"
+#include "i2c.hpp"
+
+class I2CFixture {
+ public:
+  I2CFixture() { REQUIRE(drivers::init_i2c() == ESP_OK); }
+  ~I2CFixture() { drivers::deinit_i2c(); }
+};

test/fixtures/spi_fixture.hpp

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+#pragma once
+
+#include "catch2/catch.hpp"
+#include "spi.hpp"
+
+class SpiFixture {
+ public:
+  SpiFixture() { REQUIRE(drivers::init_spi() == ESP_OK); }
+  ~SpiFixture() { drivers::deinit_spi(); }
+};