Note You can check other posts on my personal website: https://hbolajraf.net
In this post, we will explore how to create unit tests using xUnit, a popular unit testing framework for .NET, with complex inline data object theory methods examples.
Introduction to xUnit
xUnit is an open-source unit testing tool for the .NET Framework. It is highly extensible and provides various features to simplify the process of writing and executing unit tests.
Setting up xUnit
Before writing unit tests, make sure you have installed the xUnit framework in your project. You can do this using NuGet Package Manager or .NET CLI.
dotnet add package xunit
dotnet add package xunit.runner.visualstudio
Writing Unit Tests with Complex Inline Data Object
Example Scenario
Let's assume we have a class Calculator with a method Add, which takes two integers as input and returns their sum. We want to test this method with different sets of input data, including complex inline data objects.
using Xunit;
public class Calculator
{
public int Add(int a, int b)
{
return a + b;
}
}
Writing Unit Tests
using Xunit;
public class CalculatorTests
{
private readonly Calculator _calculator;
public CalculatorTests()
{
_calculator = new Calculator();
}
[Theory]
[InlineData(2, 3, 5)] // Simple inline data
[InlineData(-2, -3, -5)] // Simple inline data with negative numbers
[InlineData(0, 0, 0)] // Simple inline data with zeros
[InlineData(1000, 500, 1500)] // Simple inline data with large numbers
[InlineData(1, -1, 0)] // Simple inline data with mixed positive and negative numbers
[InlineData(2147483647, 1, -2147483648)] // Simple inline data with maximum integer value
[InlineData(-2147483648, -1, 2147483647)] // Simple inline data with minimum integer value
[InlineData(int.MaxValue, 0, int.MaxValue)] // Simple inline data with maximum integer value and zero
[InlineData(int.MinValue, 0, int.MinValue)] // Simple inline data with minimum integer value and zero
[InlineData(2147483647, -2147483648, -1)] // Simple inline data with maximum and minimum integer values
[InlineData(int.MaxValue, int.MaxValue, -2)] // Simple inline data with two maximum integer values
[InlineData(int.MinValue, int.MinValue, 0)] // Simple inline data with two minimum integer values
[InlineData(0, 2147483647, 2147483647)] // Simple inline data with zero and maximum integer value
[InlineData(0, int.MinValue, int.MinValue)] // Simple inline data with zero and minimum integer value
[InlineData(int.MinValue, int.MaxValue, -1)] // Simple inline data with maximum and minimum integer values
public void Add_WithInlineData_ReturnsExpectedResult(int a, int b, int expected)
{
// Arrange
// Act
int result = _calculator.Add(a, b);
// Assert
Assert.Equal(expected, result);
}
[Theory]
[ClassData(typeof(ComplexInlineDataGenerator))]
public void Add_WithComplexInlineData_ReturnsExpectedResult(int a, int b, int expected)
{
// Arrange
// Act
int result = _calculator.Add(a, b);
// Assert
Assert.Equal(expected, result);
}
}
public class ComplexInlineDataGenerator : IEnumerable<object[]>
{
private readonly List<object[]> _data = new List<object[]>
{
new object[] { 2, 3, 5 },
new object[] { -2, -3, -5 },
new object[] { 0, 0, 0 },
new object[] { 1000, 500, 1500 },
new object[] { 1, -1, 0 },
new object[] { 2147483647, 1, -2147483648 },
new object[] { -2147483648, -1, 2147483647 },
new object[] { int.MaxValue, 0, int.MaxValue },
new object[] { int.MinValue, 0, int.MinValue },
new object[] { 2147483647, -2147483648, -1 },
new object[] { int.MaxValue, int.MaxValue, -2 },
new object[] { int.MinValue, int.MinValue, 0 },
new object[] { 0, 2147483647, 2147483647 },
new object[] { 0, int.MinValue, int.MinValue },
new object[] { int.MinValue, int.MaxValue, -1 }
};
public IEnumerator<object[]> GetEnumerator() => _data.GetEnumerator();
IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
}
In this example:
- We have a
CalculatorTestsclass containing tests for theAddmethod of theCalculatorclass. - We use
[Theory]attribute to denote parameterized tests. - We use
[InlineData]attribute to provide inline data for simple test cases. - We define a custom data generator class
ComplexInlineDataGeneratorimplementingIEnumerable<object[]>to generate complex inline data. - The
ComplexInlineDataGeneratorclass provides a collection of test cases with complex inline data. - Each test case consists of three integers:
a,b, and the expected resultexpected. - We use
Assert.Equalto verify that the actual result matches the expected result.
What Next?
By using xUnit with complex inline data object theory methods examples, we can effectively test methods with various input scenarios, ensuring the correctness and robustness of our code.
Top comments (0)