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- // Licensed to the .NET Foundation under one or more agreements.
- // The .NET Foundation licenses this file to you under the Apache 2.0 License.
- // See the LICENSE file in the project root for more information.
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using System.Reactive;
- using System.Reactive.Concurrency;
- using System.Reactive.Linq;
- using Microsoft.Reactive.Testing;
- using Xunit;
- using ReactiveTests.Dummies;
- using System.Reflection;
- using System.Threading;
- using System.Reactive.Disposables;
- using System.Reactive.Subjects;
- namespace ReactiveTests.Tests
- {
- public class DistinctTest : ReactiveTest
- {
- [Fact]
- public void Distinct_ArgumentChecking()
- {
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>)));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>), EqualityComparer<int>.Default));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, default(EqualityComparer<int>)));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>), x => x));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, default(Func<int, int>)));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>), x => x, EqualityComparer<int>.Default));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, default(Func<int, int>), EqualityComparer<int>.Default));
- ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, x => x, default(EqualityComparer<int>)));
- }
- [Fact]
- public void Distinct_DefaultComparer_AllDistinct()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 1),
- OnNext(380, 3),
- OnNext(400, 5),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct()
- );
- res.Messages.AssertEqual(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 1),
- OnNext(380, 3),
- OnNext(400, 5),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_DefaultComparer_SomeDuplicates()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 2),
- OnNext(380, 3),
- OnNext(400, 4),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct()
- );
- res.Messages.AssertEqual(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(380, 3),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_CustomComparer_AllDistinct()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 1),
- OnNext(380, 3),
- OnNext(400, 5),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct(new ModComparer(10))
- );
- res.Messages.AssertEqual(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 1),
- OnNext(380, 3),
- OnNext(400, 5),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_CustomComparer_SomeDuplicates()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 12),
- OnNext(380, 3),
- OnNext(400, 24),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct(new ModComparer(10))
- );
- res.Messages.AssertEqual(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(380, 3),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- class ModComparer : IEqualityComparer<int>
- {
- private readonly int _mod;
- public ModComparer(int mod)
- {
- _mod = mod;
- }
- public bool Equals(int x, int y)
- {
- return EqualityComparer<int>.Default.Equals(x % _mod, y % _mod);
- }
- public int GetHashCode(int obj)
- {
- return EqualityComparer<int>.Default.GetHashCode(obj % _mod);
- }
- }
- [Fact]
- public void Distinct_KeySelector_DefaultComparer_AllDistinct()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 8),
- OnNext(300, 4),
- OnNext(350, 2),
- OnNext(380, 6),
- OnNext(400, 10),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct(x => x / 2)
- );
- res.Messages.AssertEqual(
- OnNext(280, 8),
- OnNext(300, 4),
- OnNext(350, 2),
- OnNext(380, 6),
- OnNext(400, 10),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_KeySelector_DefaultComparer_SomeDuplicates()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(350, 3),
- OnNext(380, 7),
- OnNext(400, 5),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct(x => x / 2)
- );
- res.Messages.AssertEqual(
- OnNext(280, 4),
- OnNext(300, 2),
- OnNext(380, 7),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_KeySelector_CustomComparer_AllDistinct()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 8),
- OnNext(300, 4),
- OnNext(350, 2),
- OnNext(380, 6),
- OnNext(400, 10),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct(x => x / 2, new ModComparer(10))
- );
- res.Messages.AssertEqual(
- OnNext(280, 8),
- OnNext(300, 4),
- OnNext(350, 2),
- OnNext(380, 6),
- OnNext(400, 10),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_KeySelector_CustomComparer_SomeDuplicates()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 8),
- OnNext(300, 4),
- OnNext(350, 2),
- OnNext(380, 6),
- OnNext(400, 10),
- OnCompleted<int>(420)
- );
- var res = scheduler.Start(() =>
- xs.Distinct(x => x / 2, new ModComparer(3))
- );
- res.Messages.AssertEqual(
- OnNext(280, 8),
- OnNext(300, 4),
- OnNext(380, 6),
- OnCompleted<int>(420)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 420)
- );
- }
- [Fact]
- public void Distinct_KeySelector_Throws()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 3),
- OnNext(300, 2),
- OnNext(350, 1),
- OnNext(380, 0),
- OnNext(400, 4),
- OnCompleted<int>(420)
- );
- var ex = new Exception();
- var res = scheduler.Start(() =>
- xs.Distinct(x => { if (x == 0) throw ex; return x / 2; })
- );
- res.Messages.AssertEqual(
- OnNext(280, 3),
- OnNext(350, 1),
- OnError<int>(380, ex)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 380)
- );
- }
- [Fact]
- public void Distinct_CustomComparer_Throws()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 1),
- OnNext(300, 2),
- OnNext(350, 3),
- OnNext(380, 4),
- OnNext(400, 5),
- OnCompleted<int>(420)
- );
- var ex = new Exception();
- var res = scheduler.Start(() =>
- xs.Distinct(new ThrowComparer(4, ex))
- );
- res.Messages.AssertEqual(
- OnNext(280, 1),
- OnNext(300, 2),
- OnNext(350, 3),
- OnError<int>(380, ex)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 380)
- );
- }
- class ThrowComparer : IEqualityComparer<int>
- {
- private readonly int _err;
- private readonly Exception _ex;
- public ThrowComparer(int err, Exception ex)
- {
- _err = err;
- _ex = ex;
- }
- public bool Equals(int x, int y)
- {
- return EqualityComparer<int>.Default.Equals(x, y);
- }
- public int GetHashCode(int obj)
- {
- if (obj == _err)
- throw _ex;
- return EqualityComparer<int>.Default.GetHashCode(obj);
- }
- }
- [Fact]
- public void Distinct_Throw()
- {
- var scheduler = new TestScheduler();
- var ex = new Exception();
- var xs = scheduler.CreateHotObservable(
- OnNext(280, 1),
- OnNext(300, 2),
- OnNext(350, 3),
- OnError<int>(380, ex)
- );
- var res = scheduler.Start(() =>
- xs.Distinct()
- );
- res.Messages.AssertEqual(
- OnNext(280, 1),
- OnNext(300, 2),
- OnNext(350, 3),
- OnError<int>(380, ex)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 380)
- );
- }
- [Fact]
- public void Distinct_Null()
- {
- var scheduler = new TestScheduler();
- var xs = scheduler.CreateHotObservable(
- OnNext(220, "bar"),
- OnNext(240, default(string)),
- OnNext(260, "bar"),
- OnNext(280, "foo"),
- OnNext(300, default(string)),
- OnCompleted<string>(400)
- );
- var res = scheduler.Start(() =>
- xs.Distinct()
- );
- res.Messages.AssertEqual(
- OnNext(220, "bar"),
- OnNext(240, default(string)),
- OnNext(280, "foo"),
- OnCompleted<string>(400)
- );
- xs.Subscriptions.AssertEqual(
- Subscribe(200, 400)
- );
- }
- }
- }
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