[CI] - Configure golden tests (Resolves #36)

Author: matthew-carroll

.gitignore

@@ -1,3 +1,6 @@
+test/**/failures/
+test_goldens/**/failures/
+
 # Miscellaneous
 *.class
 *.log

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2022 Declarative, Inc.
+Copyright (c) 2025 Declarative, Inc.
 
 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:
 

doc/website/source/styles/docs_page_layout.scss

@@ -263,15 +263,15 @@ main.page-content {
 
   p {
     margin-bottom: 1.5em;
+  }
 
-    code {
-      padding: 3px 6px;
-      background: #7f00a6;
-      border: 1px solid #a218cc;
-      border-radius: 4px;
+  code {
+    padding: 3px 6px;
+    background: #7f00a6;
+    border: 1px solid #a218cc;
+    border-radius: 4px;
 
-      color: WHITE;
-    }
+    color: WHITE;
   }
 
   li {

golden_tester.Dockerfile

@@ -0,0 +1,24 @@
+FROM ubuntu:latest
+
+ENV FLUTTER_HOME=${HOME}/sdks/flutter 
+ENV PATH ${PATH}:${FLUTTER_HOME}/bin:${FLUTTER_HOME}/bin/cache/dart-sdk/bin
+
+USER root
+
+RUN apt update
+
+RUN apt install -y git curl unzip
+
+# Print the Ubuntu version. Useful when there are failing tests.
+RUN cat /etc/lsb-release
+
+# Invalidate the cache when flutter pushes a new commit.
+ADD https://api.github.com/repos/flutter/flutter/git/refs/heads/master ./flutter-latest-master
+
+RUN git clone https://github.com/flutter/flutter.git ${FLUTTER_HOME}
+
+RUN flutter doctor
+
+# Copy the whole repo.
+# We need this because we use local dependencies.
+COPY ./ /golden_tester

lib/src/scenes/gallery.dart

@@ -369,7 +369,11 @@ class Gallery {
   }
 
   Widget _buildItem(
-      WidgetTester tester, GoldenSceneItemScaffold itemScaffold, BoxConstraints? constraints, Widget content) {
+    WidgetTester tester,
+    GoldenSceneItemScaffold itemScaffold,
+    BoxConstraints? constraints,
+    Widget content,
+  ) {
     return itemScaffold(
       tester,
       ConstrainedBox(
@@ -593,8 +597,10 @@ Image.memory(
 
     if (mismatches.mismatches.isEmpty) {
       FtgLog.pipeline.info("No golden mismatches found");
+      return;
     }
 
+    FtgLog.pipeline.info("Found ${mismatches.mismatches.length} golden mismatches in scene.");
     final report = GoldenSceneReport(
       metadata: metadata,
       items: items,

lib/src/scenes/golden_scene.dart

@@ -217,7 +217,10 @@ Widget defaultGoldenSceneItemDecorator(
       mainAxisSize: MainAxisSize.min,
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        content,
+        Align(
+          alignment: Alignment.centerLeft,
+          child: content,
+        ),
         Padding(
           padding: const EdgeInsets.all(24),
           child: Text(