public async Task Stop_AlreadyStopped_DoesNothing()
{
// Arrange
var fixture = new PwmPinFixture();
var mockPin =
fixture
.WithCurrentDutyCycle(0)
.CreateFakePin();
// Act
await mockPin.Stop();
// Assert
fixture.DutycycleChanges.Should()
.BeEmpty("'changing' to current value could cause an infinite loop.");
}
public async Task ChangeDutyCycleInSteps_AtTargetDutycycleAlready_DoesNothing(int dutyCycle)
{
// Arrange
var fixture = new PwmPinFixture();
var mockPin =
fixture
.WithCurrentDutyCycle(dutyCycle)
.CreateFakePin();
// Act
await mockPin.ChangeDutyCycleInStepsAsync(dutyCycle);
// Assert
fixture.DutycycleChanges.Should()
.BeEmpty("'changing' to current value could cause an infinite loop.");
}
public async Task ChangeDutyCycleInSteps_ChangeSmallerThan1PerStep_AcceleratesInFewerSteps()
{
// Arrange
var fixture = new PwmPinFixture();
var mockPin = fixture.CreateFakePin();
var expected = new List <int> {
1, 2, 3, 4
};
// Act
await mockPin.ChangeDutyCycleInStepsAsync(targetDutyCycle : 4, stepsPerChange : 5);
// Assert
fixture.DutycycleChanges.Should()
.BeEquivalentTo(expected, options => options.WithStrictOrdering());
}
public async Task ChangeDutyCycleInSteps_AtSpeed_DeAcceleratesInSteps()
{
// Arrange
var fixture = new PwmPinFixture();
var mockPin =
fixture
.WithCurrentDutyCycle(90)
.CreateFakePin();
var expected = new List <int> {
80, 70, 60, 50, 40
};
// Act
await mockPin.ChangeDutyCycleInStepsAsync(targetDutyCycle : 40, stepsPerChange : 5);
// Assert
fixture.DutycycleChanges.Should()
.BeEquivalentTo(expected, options => options.WithStrictOrdering());
}
public async Task Stop_AtSpeed_DeAcceleratesInAFewSteps(int startSpeed, int expectedStep1, int expectedStep2, int expectedStep3)
{
// Arrange
var fixture = new PwmPinFixture();
var mockPin =
fixture
.WithCurrentDutyCycle(startSpeed)
.CreateFakePin();
var expected = new List <int> {
expectedStep1, expectedStep2, expectedStep3
};
// Act
await mockPin.Stop();
// Assert
fixture.DutycycleChanges.Should()
.BeEquivalentTo(expected, options => options.WithStrictOrdering());
}
