public void When_Creating_A_Serving_Then_Food_Cannot_Be_Null()
{
#pragma warning disable 8625
Action constructor = () => _ = new ServingOfFood(null, 1);
#pragma warning restore 8625
constructor.Should().ThrowExactly <ArgumentNullException>();
}
public void When_Creating_A_Serving_Then_Servings_Must_Be_Greater_Than_Zero(
[Values(-1f, -0.1f, -0.01f, -0f, 0f)] float badServings)
{
Action constructor = () => _ = new ServingOfFood(new Food("test"), badServings);
constructor.Should().ThrowExactly <ArgumentOutOfRangeException>()
.WithMessage("A serving of food must be a positive value.*");
}
public void Then_Protein_Energy_Ratio_Is_Correct(
[ValueSource(nameof(PeRatioTestCases))]
PERatioTestCase testData,
[Values(0.01f, 0.1f, 1f, 2.5f, 10f)] float servingSize)
{
var food = new Food("fake food")
{
Carbohydrates = testData.Carbs,
Fat = testData.Fat,
Fiber = testData.Fiber,
Protein = testData.Protein
};
var model = new ServingOfFood(food, servingSize);
model.PERatio.Should().BeApproximately(testData.ExpectedRatio, 0.001f);
}
public void When_Creating_A_Serving_Of_Food_Then_Properties_Match_Values(
[Values(0.01f, 0.1f, 1f, 12.13f)] float expectedServings)
{
var expectedFood = new Food("test food")
{
Protein = 11.12f,
Carbohydrates = 13.1f,
Description = "Fake description",
Fat = 13.12f,
Fiber = 1
};
var model = new ServingOfFood(expectedFood, expectedServings);
using (new AssertionScope())
{
model.Food.Should().BeEquivalentTo(expectedFood);
model.Servings.Should().BeApproximately(expectedServings, 0.001f);
}
}
public void Then_Macronutrients_Are_Multiplied_By_Serving_Size(
[ValueSource(nameof(PeRatioTestCases))]
PERatioTestCase testData,
[Values(0.01f, 0.1f, 1f, 2.5f, 10f)] float servingSize)
{
var food = new Food("fake food")
{
Carbohydrates = testData.Carbs,
Fat = testData.Fat,
Fiber = testData.Fiber,
Protein = testData.Protein
};
var model = new ServingOfFood(food, servingSize);
using (new AssertionScope())
{
model.TotalCarbs.Should().Be(testData.Carbs < 0 ? 0 : testData.Carbs * servingSize);
model.TotalFat.Should().Be(testData.Fat < 0 ? 0 : testData.Fat * servingSize);
model.TotalFiber.Should().Be(testData.Fiber < 0 ? 0 : testData.Fiber * servingSize);
model.TotalProtein.Should().Be(testData.Protein < 0 ? 0 : testData.Protein * servingSize);
}
}