fix: add explicit error when no TypeScript logic files are found in template

src/TemplateArchiveProcessor.ts

@@ -95,6 +95,9 @@ export class TemplateArchiveProcessor {
         if(logicManager.getLanguage() === 'typescript') {
             const compiledCode:Record<string, TwoSlashReturn> = {};
             const tsFiles:Array<Script> = logicManager.getScriptManager().getScriptsForTarget('typescript');
+            if (tsFiles.length === 0) {
+                throw new Error('No TypeScript logic files found in template');
+            }
             for(let n=0; n < tsFiles.length; n++) {
                 const tsFile = tsFiles[n];
                 // console.log(`Compiling ${tsFile.getIdentifier()}`);
@@ -144,6 +147,9 @@ export class TemplateArchiveProcessor {
         if(logicManager.getLanguage() === 'typescript') {
             const compiledCode:Record<string, TwoSlashReturn> = {};
             const tsFiles:Array<Script> = logicManager.getScriptManager().getScriptsForTarget('typescript');
+            if (tsFiles.length === 0) {
+                throw new Error('No TypeScript logic files found in template');
+            }
             for(let n=0; n < tsFiles.length; n++) {
                 const tsFile = tsFiles[n];
                 // console.log(`Compiling ${tsFile.getIdentifier()}`);

test/TemplateArchiveProcessor.noLogic.test.ts

@@ -0,0 +1,27 @@
+import { Template } from '@accordproject/cicero-core';
+import { TemplateArchiveProcessor } from '../src/TemplateArchiveProcessor';
+
+describe('TemplateArchiveProcessor - no logic template', () => {
+
+    test('should throw if template has no TypeScript logic on trigger', async () => {
+
+        const template = await Template.fromDirectory(
+            'test/archives/no-logic-template',
+            { offline: true }
+        );
+
+        const processor = new TemplateArchiveProcessor(template);
+
+        const data = {
+            $class: 'org.example.TemplateModel',
+            $identifier: 'test'
+        };
+
+        const request = {};
+
+        await expect(
+            processor.trigger(data, request)).rejects.toThrow('No TypeScript logic files found');
+
+    });
+
+});

test/archives/no-logic-template/README.md

@@ -0,0 +1,3 @@
+# No Logic Template
+
+This template intentionally has no TypeScript logic.

test/archives/no-logic-template/model/model.cto

@@ -0,0 +1,6 @@
+namespace org.example
+
+@template
+asset TemplateModel {
+  o String name
+}

test/archives/no-logic-template/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "no-logic-template",
+  "version": "0.0.1",
+  "description": "Template intentionally without TypeScript logic",
+  "accordproject": {
+    "runtime": "typescript",
+    "template": "clause",
+    "cicero": "^0.25.0"
+  }
+}

test/archives/no-logic-template/text/grammar.tem.md

@@ -0,0 +1,4 @@
+Test Template
+====
+
+This is a test template for {{name}}.