bug(#788): disable html escaping and use uppercase hex colour codes

fixes #788

text-serializer-gson/src/main/java/net/kyori/adventure/text/serializer/gson/GsonComponentSerializerImpl.java

@@ -66,7 +66,10 @@ static final class Instances {
       builder.registerTypeAdapterFactory(new SerializerFactory(downsampleColor, legacyHoverSerializer, emitLegacyHover));
       return builder;
     };
-    this.serializer = this.populator.apply(new GsonBuilder()).create();
+    this.serializer = this.populator.apply(
+      new GsonBuilder()
+        .disableHtmlEscaping() // to be consistent with vanilla
+    ).create();
   }
 
   @Override

text-serializer-gson/src/main/java/net/kyori/adventure/text/serializer/gson/TextColorSerializer.java

@@ -49,10 +49,14 @@ public void write(final JsonWriter out, final TextColor value) throws IOExceptio
     } else if (this.downsampleColor) {
       out.value(NamedTextColor.NAMES.key(NamedTextColor.nearestTo(value)));
     } else {
-      out.value(value.asHexString());
+      out.value(asUpperCaseHexString(value));
     }
   }
 
+  private static String asUpperCaseHexString(final TextColor color) {
+    return String.format("#%06X", color.value()); // to be consistent with vanilla
+  }
+
   @Override
   public @Nullable TextColor read(final JsonReader in) throws IOException {
     final @Nullable TextColor color = fromString(in.nextString());

text-serializer-gson/src/test/java/net/kyori/adventure/text/serializer/gson/Issue788Test.java

@@ -0,0 +1,39 @@
+/*
+ * This file is part of adventure, licensed under the MIT License.
+ *
+ * Copyright (c) 2017-2022 KyoriPowered
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package net.kyori.adventure.text.serializer.gson;
+
+import net.kyori.adventure.text.Component;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class Issue788Test {
+  @Test
+  void test() {
+    final String expected = "{\"extra\":[{\"color\":\"#FF00FF\",\"text\":\"PREPEND>\"},{\"text\":\"/sign test\"},{\"color\":\"#FF00FF\",\"text\":\"<APPEND\"}],\"text\":\"\"}";
+    final Component component = GsonComponentSerializer.gson().deserialize(expected);
+    final String actual = GsonComponentSerializer.gson().serialize(component);
+    assertEquals(expected, actual);
+  }
+}

text-serializer-gson/src/test/java/net/kyori/adventure/text/serializer/gson/StyleTest.java

@@ -80,7 +80,7 @@ void testEmpty() {
 
   @Test
   void testHexColor() {
-    this.test(Style.style(TextColor.color(0x0a1ab9)), object(json -> json.addProperty(StyleSerializer.COLOR, "#0a1ab9")));
+    this.test(Style.style(TextColor.color(0x0a1ab9)), object(json -> json.addProperty(StyleSerializer.COLOR, "#0A1AB9")));
   }
 
   @Test
@@ -159,7 +159,7 @@ void testShowEntityHoverEvent() {
             contents.addProperty(ShowEntitySerializer.ID, dolores.toString());
             contents.add(ShowEntitySerializer.NAME, object(name -> {
               name.addProperty(ComponentSerializerImpl.TEXT, "Dolores");
-              name.addProperty(StyleSerializer.COLOR, "#0a1ab9");
+              name.addProperty(StyleSerializer.COLOR, "#0A1AB9");
             }));
           }));
         }));