120 lines
3.4 KiB
Cheetah
120 lines
3.4 KiB
Cheetah
#include <gtest/gtest.h>
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#include "mock_arduino.h"
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#include "hal.h"
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#include "sim_hal.h"
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#include "tmp36_sim.h"
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#include "{{PROJECT_NAME}}_app.h"
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// ============================================================================
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// System Tests -- exercise WeatherApp with simulated sensor and hardware
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//
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// These tests use SimHal (simulated GPIO, timing, serial) and Tmp36Sim
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// (simulated analog sensor with noise). No mocking expectations -- we
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// observe real behavior through SimHal's inspection API.
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// ============================================================================
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class WeatherSystemTest : public ::testing::Test {
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protected:
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void SetUp() override {
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mock_arduino_reset();
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sim_.setMillis(0);
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}
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SimHal sim_;
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Tmp36Sim sensor_{25.0f}; // 25 C base temperature
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};
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TEST_F(WeatherSystemTest, StartsAndPrintsToSerial) {
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WeatherApp app(&sim_, &sensor_);
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app.begin();
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std::string output = sim_.serialOutput();
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EXPECT_NE(output.find("WeatherApp started"), std::string::npos);
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EXPECT_NE(output.find("Temperature:"), std::string::npos);
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}
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TEST_F(WeatherSystemTest, InitialReadingIsReasonable) {
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Tmp36Sim exact_sensor(25.0f, 0.0f); // zero noise
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WeatherApp app(&sim_, &exact_sensor);
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app.begin();
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EXPECT_NEAR(app.lastCelsius(), 25.0f, 1.0f);
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EXPECT_EQ(app.readCount(), 1);
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}
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TEST_F(WeatherSystemTest, ReadsAtTwoSecondIntervals) {
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WeatherApp app(&sim_, &sensor_);
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app.begin();
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EXPECT_EQ(app.readCount(), 1);
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// 1 second -- no new reading
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sim_.advanceMillis(1000);
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app.update();
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EXPECT_EQ(app.readCount(), 1);
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// 2 seconds -- new reading
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sim_.advanceMillis(1000);
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app.update();
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EXPECT_EQ(app.readCount(), 2);
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// 4 seconds -- another reading
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sim_.advanceMillis(2000);
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app.update();
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EXPECT_EQ(app.readCount(), 3);
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}
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TEST_F(WeatherSystemTest, FiveMinuteRun) {
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WeatherApp app(&sim_, &sensor_);
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app.begin();
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// Run 5 minutes at 100ms resolution
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for (int i = 0; i < 3000; ++i) {
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sim_.advanceMillis(100);
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app.update();
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}
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// 5 minutes = 300 seconds / 2 second interval = 150 readings + 1 initial
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EXPECT_EQ(app.readCount(), 151);
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}
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TEST_F(WeatherSystemTest, TemperatureChangeMidRun) {
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Tmp36Sim sensor(20.0f, 0.0f); // start at 20 C, no noise
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WeatherApp app(&sim_, &sensor);
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app.begin();
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EXPECT_NEAR(app.lastCelsius(), 20.0f, 1.0f);
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// Change temperature and wait for next reading
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sensor.setBaseTemperature(35.0f);
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sim_.advanceMillis(2000);
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app.update();
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EXPECT_NEAR(app.lastCelsius(), 35.0f, 1.0f);
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}
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TEST_F(WeatherSystemTest, SerialOutputContainsFahrenheit) {
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Tmp36Sim exact_sensor(0.0f, 0.0f); // 0 C = 32 F
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WeatherApp app(&sim_, &exact_sensor);
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app.begin();
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std::string output = sim_.serialOutput();
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EXPECT_NE(output.find("32"), std::string::npos)
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<< "Should contain 32 F for 0 C: " << output;
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}
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TEST_F(WeatherSystemTest, NoisyReadingsStayInRange) {
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Tmp36Sim noisy_sensor(25.0f, 2.0f); // +/- 2 C noise
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noisy_sensor.setSeed(42);
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WeatherApp app(&sim_, &noisy_sensor);
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for (int i = 0; i < 20; ++i) {
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sim_.setMillis(i * 2000);
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if (i == 0) app.begin(); else app.update();
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float c = app.lastCelsius();
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EXPECT_GE(c, 20.0f) << "Reading " << i << " too low: " << c;
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EXPECT_LE(c, 30.0f) << "Reading " << i << " too high: " << c;
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}
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}
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