From bc3d415db8efdbd13bd15bcade59c49d19992b35 Mon Sep 17 00:00:00 2001
From: Anthony Shaw <anthony.p.shaw@gmail.com>
Date: Mon, 8 Apr 2024 09:31:24 +1000
Subject: [PATCH 1/3] Find invalid state exceptions

---
 src/panel/basepettype.ts | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/panel/basepettype.ts b/src/panel/basepettype.ts
index 55ebeba7..9a08c9f2 100644
--- a/src/panel/basepettype.ts
+++ b/src/panel/basepettype.ts
@@ -1,4 +1,4 @@
-import { PetColor, PetSize, PetSpeed } from '../common/types';
+import { PetColor, PetSize, PetSpeed, PetType } from '../common/types';
 import { IPetType } from './states';
 import { ISequenceTree } from './sequences';
 import {
@@ -13,7 +13,15 @@ import {
     FrameResult,
 } from './states';
 
-export class InvalidStateException {}
+export class InvalidStateException {
+    fromState: States;
+    petType: string;
+
+    constructor(fromState: States, petType: string) {
+        this.fromState = fromState;
+        this.petType = petType;
+    }
+}
 
 export abstract class BasePetType implements IPetType {
     label: string = 'base';
@@ -242,7 +250,7 @@ export abstract class BasePetType implements IPetType {
             }
         }
         if (!possibleNextStates) {
-            throw new InvalidStateException();
+            throw new InvalidStateException(fromState, this.label);
         }
         // randomly choose the next state
         const idx = Math.floor(Math.random() * possibleNextStates.length);

From b9f670400b45b20a3b4d03a964482a6fccb52134 Mon Sep 17 00:00:00 2001
From: Anthony Shaw <anthony.p.shaw@gmail.com>
Date: Mon, 8 Apr 2024 09:33:13 +1000
Subject: [PATCH 2/3] Remove unused import

---
 src/panel/basepettype.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/panel/basepettype.ts b/src/panel/basepettype.ts
index 9a08c9f2..fb91c899 100644
--- a/src/panel/basepettype.ts
+++ b/src/panel/basepettype.ts
@@ -1,4 +1,4 @@
-import { PetColor, PetSize, PetSpeed, PetType } from '../common/types';
+import { PetColor, PetSize, PetSpeed } from '../common/types';
 import { IPetType } from './states';
 import { ISequenceTree } from './sequences';
 import {

From e44f8f18f610b6152f002d453df72f0defd875f7 Mon Sep 17 00:00:00 2001
From: Anthony Shaw <anthony.p.shaw@gmail.com>
Date: Mon, 8 Apr 2024 09:43:18 +1000
Subject: [PATCH 3/3] Use base error

---
 src/panel/basepettype.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/panel/basepettype.ts b/src/panel/basepettype.ts
index fb91c899..732bca92 100644
--- a/src/panel/basepettype.ts
+++ b/src/panel/basepettype.ts
@@ -13,11 +13,12 @@ import {
     FrameResult,
 } from './states';
 
-export class InvalidStateException {
+export class InvalidStateError extends Error {
     fromState: States;
     petType: string;
 
     constructor(fromState: States, petType: string) {
+        super(`Invalid state ${fromState} for pet type ${petType}`);
         this.fromState = fromState;
         this.petType = petType;
     }
@@ -250,7 +251,7 @@ export abstract class BasePetType implements IPetType {
             }
         }
         if (!possibleNextStates) {
-            throw new InvalidStateException(fromState, this.label);
+            throw new InvalidStateError(fromState, this.label);
         }
         // randomly choose the next state
         const idx = Math.floor(Math.random() * possibleNextStates.length);