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SingleOrNoneAsyncTest.cs
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SingleOrNoneAsyncTest.cs
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using Funcky.Extensions;
using Funcky.Xunit;
using Xunit;
namespace Funcky.EntityFrameworkCore.Test.Extensions.AsyncQueryableExtensions;
public sealed class SingleOrNoneAsyncTest
{
[Fact]
public async Task ReturnsNoneWhenNoMatchingEntitiesAreFound()
{
using var db = new TestContext();
FunctionalAssert.IsNone(await db.People.SingleOrNoneAsync());
}
[Fact]
public async Task ReturnsSomeWhenOneEntityIsFound()
{
using var db = new TestContext();
var insertedPerson = new Person { FirstName = "Jane", LastName = "Doe" };
await db.People.AddAsync(insertedPerson);
await db.SaveChangesAsync();
var person = FunctionalAssert.IsSome(await db.People.SingleOrNoneAsync());
Assert.Equal(insertedPerson.Id, person.Id);
}
[Fact]
public async Task ReturnsSomeWhenAMatchingEntityIsFound()
{
using var db = new TestContext();
var insertedPerson1 = new Person { FirstName = "Jane", LastName = "Doe" };
await db.People.AddAsync(insertedPerson1);
var insertedPerson2 = new Person { FirstName = "Peter", LastName = "Example" };
await db.People.AddAsync(insertedPerson2);
await db.SaveChangesAsync();
var person = FunctionalAssert.IsSome(await db.People.SingleOrNoneAsync(p => p.FirstName == "Jane"));
Assert.Equal(insertedPerson1.Id, person.Id);
}
[Fact]
public async Task ThrowsWhenMoreThanOneEntitiesAreFound()
{
using var db = new TestContext();
var insertedPerson1 = new Person { FirstName = "Jane", LastName = "Doe" };
await db.People.AddAsync(insertedPerson1);
var insertedPerson2 = new Person { FirstName = "Peter", LastName = "Example" };
await db.People.AddAsync(insertedPerson2);
await db.SaveChangesAsync();
await Assert.ThrowsAsync<InvalidOperationException>(async () => await db.People.SingleOrNoneAsync());
}
[Fact]
public async Task ThrowsWhenMoreThanOneMatchingEntitiesAreFound()
{
using var db = new TestContext();
var insertedPerson1 = new Person { FirstName = "Jane", LastName = "Doe" };
await db.People.AddAsync(insertedPerson1);
var insertedPerson2 = new Person { FirstName = "Jane", LastName = "Example" };
await db.People.AddAsync(insertedPerson2);
var insertedPerson3 = new Person { FirstName = "Peter", LastName = "Example" };
await db.People.AddAsync(insertedPerson3);
await db.SaveChangesAsync();
await Assert.ThrowsAsync<InvalidOperationException>(async () => await db.People.SingleOrNoneAsync(p => p.FirstName == "Jane"));
}
}