Add workflow to test Crystal client

.github/workflows/samples-crystal.yaml

@@ -0,0 +1,37 @@
+name: Samples Crystal clients
+
+on:
+  push:
+    paths:
+      - samples/client/petstore/crystal/**
+  pull_request:
+    paths:
+      - samples/client/petstore/crystal/**
+jobs:
+  build:
+    name: Build Crystal projects
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sample:
+          # clients
+          - samples/client/petstore/crystal/
+    services:
+      petstore-api:
+        image: swaggerapi/petstore
+        ports:
+          - 80:8080
+        env:
+          SWAGGER_HOST: http://petstore.swagger.io
+          SWAGGER_BASE_PATH: /v2
+    steps:
+      - uses: actions/checkout@v5
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1
+      - name: Shards Install
+        run: shards install
+        working-directory: ${{ matrix.sample }}
+      - name: Run tests
+        run: crystal spec
+        working-directory: ${{ matrix.sample }}

modules/openapi-generator/src/test/resources/3_0/crystal/petstore.yaml

@@ -1,6 +1,6 @@
 openapi: 3.0.0
 servers:
-  - url: 'http://petstore.swagger.io/v2'
+  - url: 'http://localhost/v2'
 info:
   description: >-
     This is a sample server Petstore server. For this sample, you can use the api key
@@ -636,7 +636,7 @@ components:
       type: oauth2
       flows:
         implicit:
-          authorizationUrl: 'http://petstore.swagger.io/api/oauth/dialog'
+          authorizationUrl: 'http://localhost/api/oauth/dialog'
           scopes:
             'write:pets': modify pets in your account
             'read:pets': read your pets

samples/client/petstore/crystal/.openapi-generator-ignore

@@ -21,3 +21,5 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+#
+#

samples/client/petstore/crystal/src/petstore/configuration.cr

@@ -130,7 +130,7 @@ module Petstore
     # Create a new `Configuration`.
     def initialize
       @scheme = "http"
-      @host = "petstore.swagger.io"
+      @host = "localhost"
       @base_path = "/v2"
       @server_index = 0
       @server_operation_index = {} of Symbol => String
@@ -237,7 +237,7 @@ module Petstore
     def server_settings
       [
         {
-          url: "http://petstore.swagger.io/v2",
+          url: "http://localhost/v2",
           description: "No description provided",
         }
       ]