generate-blueprint: migrate tests to blueprint as array

generators/base/generator.ts

@@ -540,8 +540,11 @@ export default class JHipsterBaseBlueprintGenerator<TaskTypes extends BaseTaskTy
   private async _configureBlueprints() {
     let argvBlueprints = this.options.blueprints || '';
     // check for old single blueprint declaration
-    const { blueprint } = this.options;
+    let { blueprint } = this.options;
     if (blueprint) {
+      if (typeof blueprint === 'string') {
+        blueprint = [blueprint];
+      }
       this.log.warn('--blueprint option is deprecated. Please use --blueprints instead');
       argvBlueprints = union(blueprint, argvBlueprints.split(',')).join(',');
     }

generators/generate-blueprint/generator.ts

@@ -258,6 +258,15 @@ export default class extends BaseGenerator {
 
   get postWriting() {
     return this.asPostWritingTaskGroup({
+      upgrade() {
+        if (!this.application[GENERATORS]) return;
+        if (!this.isJhipsterVersionLessThan('8.7.2')) return;
+        for (const generator of Object.keys(this.application[GENERATORS])) {
+          const extension = this.application.js ? 'js' : 'mjs';
+          const generatorSpec = `${this.application.blueprintsPath}${generator}/generator.spec.${extension}`;
+          this.editFile(generatorSpec, content => content.replaceAll(/blueprint: '([\w-]*)'/g, "blueprint: ['$1']"));
+        }
+      },
       packageJson() {
         if (this.jhipsterConfig[LOCAL_BLUEPRINT_OPTION]) return;
         const { packagejs } = this.application;

generators/generate-blueprint/templates/generators/generator/generator.spec.mjs.ejs

@@ -36,7 +36,7 @@ describe('SubGenerator <%= subGenerator %> of <%= application.baseName %> JHipst
         .withOptions({
           ignoreNeedlesError: true,
 <%_ if (!customGenerator) { _%>
-          blueprint: '<%= application.baseName %>',
+          blueprint: ['<%= application.baseName %>'],
 <%_ } _%>
 <%_ if (subGenerator === 'jdl') { _%>
           inline: 'application { }',