Added tests for Easy::Instance.

README.adoc

@@ -401,7 +401,7 @@ strings and you can use unsupported fields in an `Entity` by converting it to
 * [ ] Conversation
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-* [ ] Instance
+* [x] Instance
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tests/entities/test_instance.cpp

@@ -0,0 +1,102 @@
+/*  This file is part of mastodon-cpp.
+ *  Copyright © 2019 tastytea <tastytea@tastytea.de>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <exception>
+#include <string>
+#include <chrono>
+#include <catch.hpp>
+#include "easy/entities/instance.hpp"
+#include "easy/easy.hpp"
+
+using std::string;
+using std::chrono::system_clock;
+
+using namespace Mastodon;
+
+SCENARIO ("Easy::Instance works as intended", "[entity]")
+{
+    GIVEN ("An Easy::Instance object")
+    {
+        Easy::Instance instance;
+        bool exception = false;
+
+        WHEN ("It is initialized with valid instance data")
+        {
+            const string data =
+                "{\"version\":\"2.6.5 (compatible; SuperSoftware 0.0.1)\","
+                "\"urls\":{\"streaming_api\":\"wss://example.com\"},"
+                "\"uri\":\"https://example.com\","
+                "\"title\":\"example.com\","
+                "\"thumbnail\":\"https://example.com/instance/thumbnail.jpeg\","
+                "\"stats\":"
+                  "{\"user_count\":3,\"status_count\":50,\"domain_count\":171},"
+                "\"registrations\":null,"
+                "\"max_toot_chars\":4096,"
+                "\"languages\":[\"en\"],"
+                "\"email\":\"admin@example.com\","
+                "\"description\":\"Good instance.\"}";
+
+            try
+            {
+                instance.from_string(data);
+            }
+            catch (const std::exception &e)
+            {
+                exception = true;
+            }
+
+            THEN ("No exception is thrown")
+                AND_THEN ("Instance is valid")
+                AND_THEN ("The attributes are set to the right values")
+            {
+                REQUIRE_FALSE(exception);
+                REQUIRE(instance.valid());
+                REQUIRE(instance.version()
+                        == "2.6.5 (compatible; SuperSoftware 0.0.1)");
+                REQUIRE(instance.urls().streaming_api == "wss://example.com");
+                REQUIRE(instance.uri() == "https://example.com");
+                REQUIRE(instance.title() == "example.com");
+                REQUIRE(instance.thumbnail()
+                        == "https://example.com/instance/thumbnail.jpeg");
+                REQUIRE(instance.stats().user_count == 3);
+                REQUIRE(instance.languages().front() == "en");
+                REQUIRE(instance.email() == "admin@example.com");
+                REQUIRE(instance.description() == "Good instance.");
+            }
+        }
+
+        WHEN ("It is initialized with an empty string")
+        {
+            try
+            {
+                instance.from_string("");
+            }
+            catch (const std::exception &e)
+            {
+                exception = true;
+            }
+
+            THEN ("No exception is thrown")
+                AND_THEN ("It is not valid")
+                AND_THEN ("version is empty")
+            {
+                REQUIRE_FALSE(exception);
+                REQUIRE_FALSE(instance.valid());
+                REQUIRE(instance.version() == "");
+            }
+        }
+    }
+}