OpenTween v1.4.2 リリース

[opentween/open-tween.git] / OpenTween.Tests / TwitterTest.cs

diff --git a/OpenTween.Tests/TwitterTest.cs b/OpenTween.Tests/TwitterTest.cs
index d424ef5..0bf211c 100644 (file)
--- a/OpenTween.Tests/TwitterTest.cs
+++ b/OpenTween.Tests/TwitterTest.cs
@@ -24,7 +24,9 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
-using OpenTween.Api;
+using OpenTween.Api.DataModel;
+using OpenTween.Models;
+using OpenTween.Setting;
 using Xunit;
 using Xunit.Extensions;
 
@@ -53,6 +55,22 @@ namespace OpenTween
         }
 
         [Theory]
+        [InlineData("https://twitter.com/twitterapi/status/22634515958", true)]
+        [InlineData("http://twitter.com/twitterapi/status/22634515958", true)]
+        [InlineData("https://mobile.twitter.com/twitterapi/status/22634515958", true)]
+        [InlineData("http://mobile.twitter.com/twitterapi/status/22634515958", true)]
+        [InlineData("https://twitter.com/i/web/status/22634515958", false)]
+        [InlineData("https://twitter.com/imgazyobuzi/status/293333871171354624/photo/1", false)]
+        [InlineData("https://pic.twitter.com/gbxdb2Oj", false)]
+        [InlineData("https://twitter.com/messages/compose?recipient_id=514241801", true)]
+        [InlineData("http://twitter.com/messages/compose?recipient_id=514241801", true)]
+        [InlineData("https://twitter.com/messages/compose?recipient_id=514241801&text=%E3%81%BB%E3%81%92", true)]
+        public void AttachmentUrlRegexTest(string url, bool isMatch)
+        {
+            Assert.Equal(isMatch, Twitter.AttachmentUrlRegex.IsMatch(url));
+        }
+
+        [Theory]
         [InlineData("http://favstar.fm/users/twitterapi/status/22634515958", new[] { "22634515958" })]
         [InlineData("http://ja.favstar.fm/users/twitterapi/status/22634515958", new[] { "22634515958" })]
         [InlineData("http://favstar.fm/t/22634515958", new[] { "22634515958" })]
@@ -71,10 +89,10 @@ namespace OpenTween
         {
             var posts = new Dictionary<long, PostClass>
             {
-                {950L, new PostClass { StatusId = 950L, InReplyToStatusId = null }}, // このツイートが末端
-                {987L, new PostClass { StatusId = 987L, InReplyToStatusId = 950L }},
-                {999L, new PostClass { StatusId = 999L, InReplyToStatusId = 987L }},
-                {1000L, new PostClass { StatusId = 1000L, InReplyToStatusId = 999L }},
+                [950L] = new PostClass { StatusId = 950L, InReplyToStatusId = null }, // このツイートが末端
+                [987L] = new PostClass { StatusId = 987L, InReplyToStatusId = 950L },
+                [999L] = new PostClass { StatusId = 999L, InReplyToStatusId = 987L },
+                [1000L] = new PostClass { StatusId = 1000L, InReplyToStatusId = 999L },
             };
             Assert.Equal(950L, Twitter.FindTopOfReplyChain(posts, 1000L).StatusId);
             Assert.Equal(950L, Twitter.FindTopOfReplyChain(posts, 950L).StatusId);
@@ -83,22 +101,231 @@ namespace OpenTween
             posts = new Dictionary<long, PostClass>
             {
                 // 1200L は posts の中に存在しない
-                {1210L, new PostClass { StatusId = 1210L, InReplyToStatusId = 1200L }},
-                {1220L, new PostClass { StatusId = 1220L, InReplyToStatusId = 1210L }},
-                {1230L, new PostClass { StatusId = 1230L, InReplyToStatusId = 1220L }},
+                [1210L] = new PostClass { StatusId = 1210L, InReplyToStatusId = 1200L },
+                [1220L] = new PostClass { StatusId = 1220L, InReplyToStatusId = 1210L },
+                [1230L] = new PostClass { StatusId = 1230L, InReplyToStatusId = 1220L },
             };
             Assert.Equal(1210L, Twitter.FindTopOfReplyChain(posts, 1230L).StatusId);
             Assert.Equal(1210L, Twitter.FindTopOfReplyChain(posts, 1210L).StatusId);
         }
 
         [Fact]
+        public void CreateAccessibleText_MediaAltTest()
+        {
+            var text = "https://t.co/hoge";
+            var entities = new TwitterEntities
+            {
+                Media = new[]
+                {
+                    new TwitterEntityMedia
+                    {
+                        Indices = new[] { 0, 17 },
+                        Url = "https://t.co/hoge",
+                        DisplayUrl = "pic.twitter.com/hoge",
+                        ExpandedUrl = "https://twitter.com/hoge/status/1234567890/photo/1",
+                        AltText = "代替テキスト",
+                    },
+                },
+            };
+
+            var expectedText = string.Format(Properties.Resources.ImageAltText, "代替テキスト");
+
+            Assert.Equal(expectedText, Twitter.CreateAccessibleText(text, entities, quotedStatus: null, quotedStatusLink: null));
+        }
+
+        [Fact]
+        public void CreateAccessibleText_MediaNoAltTest()
+        {
+            var text = "https://t.co/hoge";
+            var entities = new TwitterEntities
+            {
+                Media = new[]
+                {
+                    new TwitterEntityMedia
+                    {
+                        Indices = new[] { 0, 17 },
+                        Url = "https://t.co/hoge",
+                        DisplayUrl = "pic.twitter.com/hoge",
+                        ExpandedUrl = "https://twitter.com/hoge/status/1234567890/photo/1",
+                        AltText = null,
+                    },
+                },
+            };
+
+            var expectedText = "pic.twitter.com/hoge";
+
+            Assert.Equal(expectedText, Twitter.CreateAccessibleText(text, entities, quotedStatus: null, quotedStatusLink: null));
+        }
+
+        [Fact]
+        public void CreateAccessibleText_QuotedUrlTest()
+        {
+            var text = "https://t.co/hoge";
+            var entities = new TwitterEntities
+            {
+                Urls = new[]
+                {
+                    new TwitterEntityUrl
+                    {
+                        Indices = new[] { 0, 17 },
+                        Url = "https://t.co/hoge",
+                        DisplayUrl = "twitter.com/hoge/status/1…",
+                        ExpandedUrl = "https://twitter.com/hoge/status/1234567890",
+                    },
+                },
+            };
+            var quotedStatus = new TwitterStatus
+            {
+                Id = 1234567890L,
+                IdStr = "1234567890",
+                User = new TwitterUser
+                {
+                    Id = 1111,
+                    IdStr = "1111",
+                    ScreenName = "foo",
+                },
+                FullText = "test",
+            };
+
+            var expectedText = string.Format(Properties.Resources.QuoteStatus_AccessibleText, "foo", "test");
+
+            Assert.Equal(expectedText, Twitter.CreateAccessibleText(text, entities, quotedStatus, quotedStatusLink: null));
+        }
+
+        [Fact]
+        public void CreateAccessibleText_QuotedUrlWithPermelinkTest()
+        {
+            var text = "hoge";
+            var entities = new TwitterEntities();
+            var quotedStatus = new TwitterStatus
+            {
+                Id = 1234567890L,
+                IdStr = "1234567890",
+                User = new TwitterUser
+                {
+                    Id = 1111,
+                    IdStr = "1111",
+                    ScreenName = "foo",
+                },
+                FullText = "test",
+            };
+            var quotedStatusLink = new TwitterQuotedStatusPermalink
+            {
+                Url = "https://t.co/hoge",
+                Display = "twitter.com/hoge/status/1…",
+                Expanded = "https://twitter.com/hoge/status/1234567890",
+            };
+
+            var expectedText = "hoge " + string.Format(Properties.Resources.QuoteStatus_AccessibleText, "foo", "test");
+
+            Assert.Equal(expectedText, Twitter.CreateAccessibleText(text, entities, quotedStatus, quotedStatusLink));
+        }
+
+        [Fact]
+        public void CreateAccessibleText_QuotedUrlNoReferenceTest()
+        {
+            var text = "https://t.co/hoge";
+            var entities = new TwitterEntities
+            {
+                Urls = new[]
+                {
+                    new TwitterEntityUrl
+                    {
+                        Indices = new[] { 0, 17 },
+                        Url = "https://t.co/hoge",
+                        DisplayUrl = "twitter.com/hoge/status/1…",
+                        ExpandedUrl = "https://twitter.com/hoge/status/1234567890",
+                    },
+                },
+            };
+            var quotedStatus = (TwitterStatus)null;
+
+            var expectedText = "twitter.com/hoge/status/1…";
+
+            Assert.Equal(expectedText, Twitter.CreateAccessibleText(text, entities, quotedStatus, quotedStatusLink: null));
+        }
+
+        [Fact]
+        public void CreateHtmlAnchor_Test()
+        {
+            var text = "@twitterapi #BreakingMyTwitter https://t.co/mIJcSoVSK3";
+            var entities = new TwitterEntities
+            {
+                UserMentions = new[]
+                {
+                    new TwitterEntityMention { Indices = new[] { 0, 11 }, ScreenName = "twitterapi" },
+                },
+                Hashtags = new[]
+                {
+                    new TwitterEntityHashtag { Indices = new[] { 12, 30 }, Text = "BreakingMyTwitter" },
+                },
+                Urls = new[]
+                {
+                    new TwitterEntityUrl
+                    {
+                        Indices = new[] { 31, 54 },
+                        Url ="https://t.co/mIJcSoVSK3",
+                        DisplayUrl = "apps-of-a-feather.com",
+                        ExpandedUrl = "http://apps-of-a-feather.com/",
+                    },
+                },
+            };
+
+            var expectedHtml = @"<a class=""mention"" href=""https://twitter.com/twitterapi"">@twitterapi</a>"
+                + @" <a class=""hashtag"" href=""https://twitter.com/search?q=%23BreakingMyTwitter"">#BreakingMyTwitter</a>"
+                + @" <a href=""https://t.co/mIJcSoVSK3"" title=""https://t.co/mIJcSoVSK3"">apps-of-a-feather.com</a>";
+
+            Assert.Equal(expectedHtml, Twitter.CreateHtmlAnchor(text, entities, quotedStatusLink: null));
+        }
+
+        [Fact]
+        public void CreateHtmlAnchor_NicovideoTest()
+        {
+            var text = "sm9";
+            var entities = new TwitterEntities();
+
+            var expectedHtml = @"<a href=""http://www.nicovideo.jp/watch/sm9"">sm9</a>";
+
+            Assert.Equal(expectedHtml, Twitter.CreateHtmlAnchor(text, entities, quotedStatusLink: null));
+        }
+
+        [Fact]
+        public void CreateHtmlAnchor_QuotedUrlWithPermelinkTest()
+        {
+            var text = "hoge";
+            var entities = new TwitterEntities();
+            var quotedStatus = new TwitterStatus
+            {
+                Id = 1234567890L,
+                IdStr = "1234567890",
+                User = new TwitterUser
+                {
+                    Id = 1111,
+                    IdStr = "1111",
+                    ScreenName = "foo",
+                },
+                FullText = "test",
+            };
+            var quotedStatusLink = new TwitterQuotedStatusPermalink
+            {
+                Url = "https://t.co/hoge",
+                Display = "twitter.com/hoge/status/1…",
+                Expanded = "https://twitter.com/hoge/status/1234567890",
+            };
+
+            var expectedHtml = @"hoge"
+                + @" <a href=""https://t.co/hoge"" title=""https://t.co/hoge"">twitter.com/hoge/status/1…</a>";
+
+            Assert.Equal(expectedHtml, Twitter.CreateHtmlAnchor(text, entities, quotedStatusLink));
+        }
+
+        [Fact]
         public void ParseSource_Test()
         {
             var sourceHtml = "<a href=\"http://twitter.com\" rel=\"nofollow\">Twitter Web Client</a>";
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("Twitter Web Client", result.Item1);
-            Assert.Equal(new Uri("http://twitter.com/"), result.Item2);
+            var expected = ("Twitter Web Client", new Uri("http://twitter.com/"));
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
@@ -106,9 +333,8 @@ namespace OpenTween
         {
             var sourceHtml = "web";
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("web", result.Item1);
-            Assert.Equal(null, result.Item2);
+            var expected = ("web", (Uri)null);
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
@@ -117,9 +343,8 @@ namespace OpenTween
             // 参照: https://twitter.com/kim_upsilon/status/477796052049752064
             var sourceHtml = "<a href=\"erased_45416\" rel=\"nofollow\">erased_45416</a>";
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("erased_45416", result.Item1);
-            Assert.Equal(new Uri("https://twitter.com/erased_45416"), result.Item2);
+            var expected = ("erased_45416", new Uri("https://twitter.com/erased_45416"));
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
@@ -128,9 +353,8 @@ namespace OpenTween
             // 参照: https://twitter.com/kim_upsilon/status/595156014032244738
             var sourceHtml = "";
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("", result.Item1);
-            Assert.Equal(null, result.Item2);
+            var expected = ("", (Uri)null);
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
@@ -138,9 +362,8 @@ namespace OpenTween
         {
             string sourceHtml = null;
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("", result.Item1);
-            Assert.Equal(null, result.Item2);
+            var expected = ("", (Uri)null);
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
@@ -148,9 +371,8 @@ namespace OpenTween
         {
             string sourceHtml = "<a href=\"http://example.com/?aaa=123&amp;bbb=456\" rel=\"nofollow\">&lt;&lt;hogehoge&gt;&gt;</a>";
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("<<hogehoge>>", result.Item1);
-            Assert.Equal(new Uri("http://example.com/?aaa=123&bbb=456"), result.Item2);
+            var expected = ("<<hogehoge>>", new Uri("http://example.com/?aaa=123&bbb=456"));
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
@@ -158,13 +380,12 @@ namespace OpenTween
         {
             string sourceHtml = "&lt;&lt;hogehoge&gt;&gt;";
 
-            var result = Twitter.ParseSource(sourceHtml);
-            Assert.Equal("<<hogehoge>>", result.Item1);
-            Assert.Equal(null, result.Item2);
+            var expected = ("<<hogehoge>>", (Uri)null);
+            Assert.Equal(expected, Twitter.ParseSource(sourceHtml));
         }
 
         [Fact]
-        public void GetQuoteTweetStatusIds_Test()
+        public void GetQuoteTweetStatusIds_EntityTest()
         {
             var entities = new[]
             {
@@ -175,28 +396,67 @@ namespace OpenTween
                 },
             };
 
-            var statusIds = Twitter.GetQuoteTweetStatusIds(entities);
+            var statusIds = Twitter.GetQuoteTweetStatusIds(entities, quotedStatusLink: null);
             Assert.Equal(new[] { 599261132361072640L }, statusIds);
         }
 
         [Fact]
+        public void GetQuoteTweetStatusIds_QuotedStatusLinkTest()
+        {
+            var entities = new TwitterEntities();
+            var quotedStatusLink = new TwitterQuotedStatusPermalink
+            {
+                Url = "https://t.co/3HXq0LrbJb",
+                Expanded = "https://twitter.com/kim_upsilon/status/599261132361072640",
+            };
+
+            var statusIds = Twitter.GetQuoteTweetStatusIds(entities, quotedStatusLink);
+            Assert.Equal(new[] { 599261132361072640L }, statusIds);
+        }
+
+        [Fact]
+        public void GetQuoteTweetStatusIds_UrlStringTest()
+        {
+            var urls = new[]
+            {
+                "https://twitter.com/kim_upsilon/status/599261132361072640",
+            };
+
+            var statusIds = Twitter.GetQuoteTweetStatusIds(urls);
+            Assert.Equal(new[] { 599261132361072640L }, statusIds);
+        }
+
+        [Fact]
+        public void GetQuoteTweetStatusIds_OverflowTest()
+        {
+            var urls = new[]
+            {
+                // 符号付き 64 ビット整数の範囲を超える値
+                "https://twitter.com/kim_upsilon/status/9999999999999999999",
+            };
+
+            var statusIds = Twitter.GetQuoteTweetStatusIds(urls);
+            Assert.Empty(statusIds);
+        }
+
+        [Fact]
         public void GetApiResultCount_DefaultTest()
         {
-            var oldInstance = SettingCommon.Instance;
-            SettingCommon.Instance = new SettingCommon();
+            var oldInstance = SettingManagerTest.Common;
+            SettingManagerTest.Common = new SettingCommon();
 
-            var timeline = SettingCommon.Instance.CountApi;
-            var reply = SettingCommon.Instance.CountApiReply;
+            var timeline = SettingManager.Common.CountApi;
+            var reply = SettingManager.Common.CountApiReply;
             var dm = 20;  // DMは固定値
-            var more = SettingCommon.Instance.MoreCountApi;
-            var startup = SettingCommon.Instance.FirstCountApi;
-            var favorite = SettingCommon.Instance.FavoritesCountApi;
-            var list = SettingCommon.Instance.ListCountApi;
-            var search = SettingCommon.Instance.SearchCountApi;
-            var usertl = SettingCommon.Instance.UserTimelineCountApi;
+            var more = SettingManager.Common.MoreCountApi;
+            var startup = SettingManager.Common.FirstCountApi;
+            var favorite = SettingManager.Common.FavoritesCountApi;
+            var list = SettingManager.Common.ListCountApi;
+            var search = SettingManager.Common.SearchCountApi;
+            var usertl = SettingManager.Common.UserTimelineCountApi;
 
             // デフォルト値チェック
-            Assert.Equal(false, SettingCommon.Instance.UseAdditionalCount);
+            Assert.False(SettingManager.Common.UseAdditionalCount);
             Assert.Equal(60, timeline);
             Assert.Equal(40, reply);
             Assert.Equal(200, more);
@@ -220,26 +480,26 @@ namespace OpenTween
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.PublicSearch, false, false));
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.UserTimeline, false, false));
 
-            SettingCommon.Instance = oldInstance;
+            SettingManagerTest.Common = oldInstance;
         }
 
         [Fact]
         public void GetApiResultCount_AdditionalCountTest()
         {
-            var oldInstance = SettingCommon.Instance;
-            SettingCommon.Instance = new SettingCommon();
+            var oldInstance = SettingManagerTest.Common;
+            SettingManagerTest.Common = new SettingCommon();
 
-            var timeline = SettingCommon.Instance.CountApi;
-            var reply = SettingCommon.Instance.CountApiReply;
+            var timeline = SettingManager.Common.CountApi;
+            var reply = SettingManager.Common.CountApiReply;
             var dm = 20;  // DMは固定値
-            var more = SettingCommon.Instance.MoreCountApi;
-            var startup = SettingCommon.Instance.FirstCountApi;
-            var favorite = SettingCommon.Instance.FavoritesCountApi;
-            var list = SettingCommon.Instance.ListCountApi;
-            var search = SettingCommon.Instance.SearchCountApi;
-            var usertl = SettingCommon.Instance.UserTimelineCountApi;
+            var more = SettingManager.Common.MoreCountApi;
+            var startup = SettingManager.Common.FirstCountApi;
+            var favorite = SettingManager.Common.FavoritesCountApi;
+            var list = SettingManager.Common.ListCountApi;
+            var search = SettingManager.Common.SearchCountApi;
+            var usertl = SettingManager.Common.UserTimelineCountApi;
 
-            SettingCommon.Instance.UseAdditionalCount = true;
+            SettingManager.Common.UseAdditionalCount = true;
 
             // Timeline
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.Timeline, false, false));
@@ -260,7 +520,7 @@ namespace OpenTween
             Assert.Equal(favorite, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.Favorites, true, false));
             Assert.Equal(favorite, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.Favorites, false, true));
 
-            SettingCommon.Instance.FavoritesCountApi = 0;
+            SettingManager.Common.FavoritesCountApi = 0;
 
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.Favorites, false, false));
             Assert.Equal(more, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.Favorites, true, false));
@@ -271,7 +531,7 @@ namespace OpenTween
             Assert.Equal(list, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.List, true, false));
             Assert.Equal(list, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.List, false, true));
 
-            SettingCommon.Instance.ListCountApi = 0;
+            SettingManager.Common.ListCountApi = 0;
 
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.List, false, false));
             Assert.Equal(more, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.List, true, false));
@@ -282,7 +542,7 @@ namespace OpenTween
             Assert.Equal(search, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.PublicSearch, true, false));
             Assert.Equal(search, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.PublicSearch, false, true));
 
-            SettingCommon.Instance.SearchCountApi = 0;
+            SettingManager.Common.SearchCountApi = 0;
 
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.PublicSearch, false, false));
             Assert.Equal(search, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.PublicSearch, true, false));  //MoreCountApiの値がPublicSearchの最大値に制限される
@@ -293,13 +553,100 @@ namespace OpenTween
             Assert.Equal(usertl, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.UserTimeline, true, false));
             Assert.Equal(usertl, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.UserTimeline, false, true));
 
-            SettingCommon.Instance.UserTimelineCountApi = 0;
+            SettingManager.Common.UserTimelineCountApi = 0;
 
             Assert.Equal(timeline, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.UserTimeline, false, false));
             Assert.Equal(more, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.UserTimeline, true, false));
             Assert.Equal(startup, Twitter.GetApiResultCount(MyCommon.WORKERTYPE.UserTimeline, false, true));
 
-            SettingCommon.Instance = oldInstance;
+            SettingManagerTest.Common = oldInstance;
+        }
+
+        [Fact]
+        public void GetTextLengthRemain_Test()
+        {
+            using (var twitter = new Twitter())
+            {
+                Assert.Equal(280, twitter.GetTextLengthRemain(""));
+                Assert.Equal(272, twitter.GetTextLengthRemain("hogehoge"));
+            }
+        }
+
+        [Fact]
+        public void GetTextLengthRemain_DirectMessageTest()
+        {
+            using (var twitter = new Twitter())
+            {
+                // 2015年8月から DM の文字数上限が 10,000 文字に変更された
+                // https://twittercommunity.com/t/41348
+                twitter.Configuration.DmTextCharacterLimit = 10000;
+
+                Assert.Equal(10000, twitter.GetTextLengthRemain("D twitter "));
+                Assert.Equal(9992, twitter.GetTextLengthRemain("D twitter hogehoge"));
+
+                // t.co に短縮される分の文字数を考慮
+                twitter.Configuration.ShortUrlLength = 20;
+                Assert.Equal(9971, twitter.GetTextLengthRemain("D twitter hogehoge http://example.com/"));
+
+                twitter.Configuration.ShortUrlLengthHttps = 21;
+                Assert.Equal(9970, twitter.GetTextLengthRemain("D twitter hogehoge https://example.com/"));
+            }
+        }
+
+        [Fact]
+        public void GetTextLengthRemain_UrlTest()
+        {
+            using (var twitter = new Twitter())
+            {
+                // t.co に短縮される分の文字数を考慮
+                twitter.TextConfiguration.TransformedURLLength = 20;
+                Assert.Equal(260, twitter.GetTextLengthRemain("http://example.com/"));
+                Assert.Equal(260, twitter.GetTextLengthRemain("http://example.com/hogehoge"));
+                Assert.Equal(251, twitter.GetTextLengthRemain("hogehoge http://example.com/"));
+
+                Assert.Equal(260, twitter.GetTextLengthRemain("https://example.com/"));
+                Assert.Equal(260, twitter.GetTextLengthRemain("https://example.com/hogehoge"));
+                Assert.Equal(251, twitter.GetTextLengthRemain("hogehoge https://example.com/"));
+            }
+        }
+
+        [Fact]
+        public void GetTextLengthRemain_UrlWithoutSchemeTest()
+        {
+            using (var twitter = new Twitter())
+            {
+                // t.co に短縮される分の文字数を考慮
+                twitter.TextConfiguration.TransformedURLLength = 20;
+                Assert.Equal(260, twitter.GetTextLengthRemain("example.com"));
+                Assert.Equal(260, twitter.GetTextLengthRemain("example.com/hogehoge"));
+                Assert.Equal(251, twitter.GetTextLengthRemain("hogehoge example.com"));
+
+                // スキーム (http://) を省略かつ末尾が ccTLD の場合は t.co に短縮されない
+                Assert.Equal(270, twitter.GetTextLengthRemain("example.jp"));
+                // ただし、末尾にパスが続く場合は t.co に短縮される
+                Assert.Equal(260, twitter.GetTextLengthRemain("example.jp/hogehoge"));
+            }
+        }
+
+        [Fact]
+        public void GetTextLengthRemain_SurrogatePairTest()
+        {
+            using (var twitter = new Twitter())
+            {
+                Assert.Equal(278, twitter.GetTextLengthRemain("🍣"));
+                Assert.Equal(267, twitter.GetTextLengthRemain("🔥🐔🔥 焼き鳥"));
+            }
+        }
+
+        [Fact]
+        public void GetTextLengthRemain_BrokenSurrogateTest()
+        {
+            using (var twitter = new Twitter())
+            {
+                // 投稿欄に IME から絵文字を入力すると HighSurrogate のみ入力された状態で TextChanged イベントが呼ばれることがある
+                Assert.Equal(278, twitter.GetTextLengthRemain("\ud83d"));
+                Assert.Equal(9999, twitter.GetTextLengthRemain("D twitter \ud83d"));
+            }
         }
     }
 }