Only transform expression satisfies templates

Previously all template tags with satisfies was transformed into an
export default statement.

Author: mogstad

packages/environment-ember-template-imports/-private/environment/transform.ts

@@ -25,7 +25,10 @@ export const transform: GlintExtensionTransform<PreprocessData> = (
     } else if (isETIDefaultTemplate(ts, node)) {
       // Annotate that this template is a default export
       setEmitMetadata(node.expression, { prepend: 'export default ' });
-
+      return node;
+    } else if (isETIDefaultSatisfiesTemplate(ts, node)) {
+      // Annotate that this template is a default export
+      setEmitMetadata(node.expression.expression, { prepend: 'export default ' });
       return node;
     } else if (isETITemplateExpression(ts, node)) {
       // Convert '[__T`foo`]' as an expression to just '__T`foo`'
@@ -111,18 +114,26 @@ type ETITemplateProperty = ts.PropertyDeclaration & {
   name: ts.ComputedPropertyName & { expression: ETITemplateLiteral };
 };
 
-type ETIDefaultTemplate =
-  | (ts.ExpressionStatement & {
-      expression: ETITemplateLiteral;
-    })
-  | (ts.SatisfiesExpression & {
-      expression: ETITemplateLiteral;
-    });
+type ETIDefaultTemplate = ts.ExpressionStatement & {
+  expression: ETITemplateLiteral;
+};
+
+type ETIDefaultSatisfiesTemplate = ts.ExpressionStatement & {
+  expression: ts.SatisfiesExpression & { expression: ETITemplateLiteral };
+};
 
 function isETIDefaultTemplate(ts: TSLib, node: ts.Node): node is ETIDefaultTemplate {
+  return ts.isExpressionStatement(node) && isETITemplateLiteral(ts, node.expression);
+}
+
+function isETIDefaultSatisfiesTemplate(
+  ts: TSLib,
+  node: ts.Node,
+): node is ETIDefaultSatisfiesTemplate {
   return (
-    (ts.isExpressionStatement(node) || ts.isSatisfiesExpression(node)) &&
-    isETITemplateLiteral(ts, node.expression)
+    ts.isExpressionStatement(node) &&
+    ts.isSatisfiesExpression(node.expression) &&
+    isETITemplateLiteral(ts, node.expression.expression)
   );
 }
 

packages/environment-ember-template-imports/__tests__/transformation.test.ts

@@ -234,6 +234,43 @@ describe('Environment: ETI', () => {
       );
     });
 
+    test('single template, no export, with satisfies', () => {
+      let source = stripIndent`
+        import type { TOC } from '@ember/component/template-only';
+        const hello = <template>HelloWorld!</template> satisfies TOC<{
+          Blocks: { default: [] }
+        }>;
+      `;
+
+      let { meta, sourceFile } = applyTransform(source);
+
+      let declaration = sourceFile.statements[2] as ts.VariableStatement;
+      let satisfiesExpression = declaration.declarationList.declarations[0]
+        .initializer! as ts.SatisfiesExpression;
+      let templateNode = satisfiesExpression.expression;
+
+      let start = source.indexOf('<template>');
+      let contentStart = start + '<template>'.length;
+      let contentEnd = source.indexOf('</template>');
+      let end = contentEnd + '</template>'.length;
+
+      expect(meta).toEqual(
+        new Map([
+          [
+            templateNode,
+            {
+              templateLocation: {
+                start,
+                contentStart,
+                contentEnd,
+                end,
+              },
+            },
+          ],
+        ]),
+      );
+    });
+
     test('multiple templates', () => {
       let source = stripIndent`
         <template>