
using Xunit;
namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "Computer class has fields for CPU, RAM, and Storage")] 
        public void Computer_HasComponentFields() 
        {
            CPU cpu = new CPU("AMD Ryzen 5", 3.7);
            RAM ram = new RAM(8);
            Storage storage = new Storage(256, "SSD");
            Computer computer = new Computer(cpu, ram, storage);
            Assert.NotNull(computer.Cpu);
            Assert.NotNull(computer.Ram);
            Assert.NotNull(computer.StorageDevice);
        }

        [Fact(DisplayName = "Computer constructor assigns provided CPU, RAM, and Storage objects")] 
        public void Computer_ConstructorAssignsFields() 
        {
            CPU cpu = new CPU("Intel i5", 2.9);
            RAM ram = new RAM(4);
            Storage storage = new Storage(128, "HDD");
            Computer computer = new Computer(cpu, ram, storage);
            Assert.Equal(cpu, computer.Cpu);
            Assert.Equal(ram, computer.Ram);
            Assert.Equal(storage, computer.StorageDevice);
        }

        [Fact(DisplayName = "GetSpecs returns combined info from all components")] 
        public void Computer_GetSpecsCombinesComponentInfo() 
        {
            CPU cpu = new CPU("Intel i9", 5.0);
            RAM ram = new RAM(32);
            Storage storage = new Storage(2048, "SSD");
            Computer computer = new Computer(cpu, ram, storage);
            string expected = $"{cpu.GetInfo()}, {ram.GetInfo()}, {storage.GetInfo()}";
            Assert.Equal(expected, computer.GetSpecs());
        }

        [Fact(DisplayName = "Computer fields are accessible after creation")] 
        public void Computer_FieldsAccessible() 
        {
            CPU cpu = new CPU("Apple M1", 3.2);
            RAM ram = new RAM(16);
            Storage storage = new Storage(512, "SSD");
            Computer computer = new Computer(cpu, ram, storage);
            Assert.Equal("Apple M1", computer.Cpu.Model);
            Assert.Equal(16, computer.Ram.SizeGB);
            Assert.Equal(512, computer.StorageDevice.CapacityGB);
            Assert.Equal("SSD", computer.StorageDevice.Type);
        }
    }
}

ProgramTests.cs

Master the art of building robust C# classes through hands-on drills and engaging theory. Explore constructors, encapsulation, access modifiers, static classes, and more, with real-world inspired challenges.

Dive into the world of constructors in C#. Learn how to initialize objects, use constructor overloading, and apply best practices for flexible class instantiation.

Explore the principles of class design, encapsulation, and how to protect and organize data using access modifiers.

Learn how to use static classes and members for shared data and utility functionality in C#.

Delve into advanced class construction topics: composition vs inheritance, and refactoring structs into classes for more complex scenarios.

Challenge: Compose a Computer Class

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