Ensure that getting a builder from the ping will produce the same ping.

api/src/main/java/com/velocitypowered/api/proxy/server/ServerPing.java

@@ -8,6 +8,7 @@ import com.velocitypowered.api.util.ModInfo;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
 
@@ -73,10 +74,32 @@ public final class ServerPing {
         + "version=" + version
         + ", players=" + players
         + ", description=" + description
-        + ", favicon='" + favicon + '\''
+        + ", favicon=" + favicon
+        + ", modinfo=" + modinfo
         + '}';
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ServerPing ping = (ServerPing) o;
+    return Objects.equals(version, ping.version)
+        && Objects.equals(players, ping.players)
+        && Objects.equals(description, ping.description)
+        && Objects.equals(favicon, ping.favicon)
+        && Objects.equals(modinfo, ping.modinfo);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(version, players, description, favicon, modinfo);
+  }
+
   /**
    * Returns a copy of this {@link ServerPing} instance as a builder so that it can be modified.
    * @return a copy of this instance as a {@link Builder}
@@ -281,6 +304,23 @@ public final class ServerPing {
           + ", name='" + name + '\''
           + '}';
     }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+      Version version = (Version) o;
+      return protocol == version.protocol && Objects.equals(name, version.name);
+    }
+
+    @Override
+    public int hashCode() {
+      return Objects.hash(protocol, name);
+    }
   }
 
   public static final class Players {
@@ -321,6 +361,24 @@ public final class ServerPing {
           + ", sample=" + sample
           + '}';
     }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+      Players players = (Players) o;
+      return online == players.online && max == players.max
+          && Objects.equals(sample, players.sample);
+    }
+
+    @Override
+    public int hashCode() {
+      return Objects.hash(online, max, sample);
+    }
   }
 
   public static final class SamplePlayer {
@@ -348,5 +406,22 @@ public final class ServerPing {
           + ", id=" + id
           + '}';
     }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+      SamplePlayer that = (SamplePlayer) o;
+      return Objects.equals(name, that.name) && Objects.equals(id, that.id);
+    }
+
+    @Override
+    public int hashCode() {
+      return Objects.hash(name, id);
+    }
   }
 }

api/src/main/java/com/velocitypowered/api/util/ModInfo.java

@@ -4,6 +4,7 @@ import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import com.google.gson.annotations.SerializedName;
 import java.util.List;
+import java.util.Objects;
 
 public final class ModInfo {
 
@@ -33,6 +34,23 @@ public final class ModInfo {
         + '}';
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModInfo modInfo = (ModInfo) o;
+    return type.equals(modInfo.type) && modList.equals(modInfo.modList);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(type, modList);
+  }
+
   public static final class Mod {
 
     @SerializedName("modid")
@@ -59,5 +77,22 @@ public final class ModInfo {
           + ", version='" + version + '\''
           + '}';
     }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+      Mod mod = (Mod) o;
+      return id.equals(mod.id) && version.equals(mod.version);
+    }
+
+    @Override
+    public int hashCode() {
+      return Objects.hash(id, version);
+    }
   }
 }

api/src/test/java/com/velocitypowered/api/proxy/server/ServerPingTest.java

@@ -0,0 +1,22 @@
+package com.velocitypowered.api.proxy.server;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import com.google.common.collect.ImmutableList;
+import com.velocitypowered.api.proxy.server.ServerPing.Players;
+import com.velocitypowered.api.proxy.server.ServerPing.SamplePlayer;
+import com.velocitypowered.api.proxy.server.ServerPing.Version;
+import java.util.UUID;
+import net.kyori.text.TextComponent;
+import org.junit.jupiter.api.Test;
+
+class ServerPingTest {
+
+  @Test
+  void asBuilderConsistency() {
+    ServerPing ping = new ServerPing(new Version(404, "1.13.2"),
+        new Players(1, 1, ImmutableList.of(new SamplePlayer("tuxed", UUID.randomUUID()))),
+        TextComponent.of("test"), null);
+    assertEquals(ping, ping.asBuilder().build());
+  }
+}