JayBazuzi

class B
{
    A a = new A();

    public F()
    {
        return a.G(...);
    }
}

JayBazuzi

class A
{
  ctor(B b)
  {
      this.b = b;
  }
  
  public F()
  {
    // Something that doesn't use B

JayBazuzi

// Tests for A
result = new A(fakeB).F();

// Tests for B
result = new B().G();

// Tests that they work together
subject = new A(new B());
result = subject.F();

JayBazuzi

internal interface IUserSettings
{
    Task<bool> GetFlag(string name);
    Task SetFlag(string name, bool value);
}

internal abstract class UserSettingsTestsBase
{
    protected abstract IUserSettings CreateSubject();

JayBazuzi

static class VerifyThatValueEqualityIsImplementedCorrectly
{
    public static void ShouldBeEqual<T>(T item, T equalItem)
        where T : IEquatable<T>
    {
        var equatable = (IEquatable<T>) item;
        equatable.Equals(equalItem).Should().BeTrue("IEquatable<>.Equals");
        equatable.Equals(item).Should().BeTrue("IEquatable<>.Equals(self)");
        equatable.Equals(null).Should().BeFalse("IEquatable<>.Equals(null)");

JayBazuzi

    interface IFooStatusReportsListener
    {
        void Notify(string productName, BarStatus[] barStatuses);
    }

    class BarClient
    {
        readonly HttpClient _httpClient = new HttpClient {BaseAddress = new Uri("https://bar.example.com/")};

        public async void UpdateShippingStatusReports(string product, IFooStatusReportsListener listener)

JayBazuzi

[TestMethod]
public void TestMethod1()
{
    var x = 0;
    Task.Run(() =>
    {
        Thread.Sleep(TimeSpan.FromSeconds(1));
        x++;
    });

JayBazuzi

class Point
{
    override bool Equals(object other) 
    { 
      return this.X == ((Point)other).X && this.Y == ((Point)other).Y; 
    }
}

new Point(...).Equals(new Bar(...)) 

JayBazuzi

class Point
{
    override bool Equals(object other) 
    { 
      if (other.GetType() != this.GetType()) return false;
      
      return this.X == ((Point)other).X && this.Y == ((Point)other).Y; 
    }
}

JayBazuzi

class Point
{
  public static bool operator==(Point left, Point right)
  {
    return left.Equals(right);
  }
}