Fix template string transpile bug. (#361)

Fixes #355
rokucommunity · Mar 16, 2021 · 08e016e · 08e016e
1 parent 471884d
commit 08e016e
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diff --git a/src/parser/Expression.ts b/src/parser/Expression.ts
@@ -1065,7 +1065,10 @@ export class TemplateStringExpression extends Expression {
                     ...items
                 );
             }
-            plus = items.length > 0 ? ' + ' : '';
+            //set the plus after the first occurance of a nonzero length set of items
+            if (plus === '' && items.length > 0) {
+                plus = ' + ';
+            }
         }
 
         for (let i = 0; i < this.quasis.length; i++) {

diff --git a/src/parser/tests/expression/TemplateStringExpression.spec.ts b/src/parser/tests/expression/TemplateStringExpression.spec.ts
@@ -191,6 +191,13 @@ describe('TemplateStringExpression', () => {
             `);
         });
 
+        it('properly transpiles two template strings side-by-side', () => {
+            testTranspile(
+                'a = `${"hello"}${"world"}`',
+                'a = "hello" + "world"'
+            );
+        });
+
         it('skips calling toString on strings', () => {
             testTranspile(`
                 text = \`Hello \${"world"}\`