nodejs
diff --git a/Collapse file
‎test/parallel/test-sqlite-aggregate-function.mjs‎
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+13Lines changed: 13 additions & 0 deletions b/Collapse file
‎test/parallel/test-sqlite-aggregate-function.mjs‎
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+13Lines changed: 13 additions & 0 deletions
diff --git a/Collapse file
‎test/parallel/test-sqlite-template-tag.js‎
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+11Lines changed: 11 additions & 0 deletions b/Collapse file
‎test/parallel/test-sqlite-template-tag.js‎
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+11Lines changed: 11 additions & 0 deletions
@@ -68,6 +68,19 @@ describe('DatabaseSync.prototype.aggregate()', () => {
         message: /The "options\.directOnly" argument must be a boolean/,
       });
     });
+
+    test('throws if options.inverse is not a function', (t) => {
+      t.assert.throws(() => {
+        db.aggregate('sum', {
+          start: 0,
+          step: (acc, value) => acc + value,
+          inverse: 10
+        });
+      }, {
+        code: 'ERR_INVALID_ARG_TYPE',
+        message: /The "options\.inverse" argument must be a function/,
+      });
+    });
   });
 });
 
 
@@ -15,6 +15,17 @@ beforeEach(() => {
   sql.clear();
 });
 
+test('throws error if database is not open', () => {
+  const db = new DatabaseSync(':memory:', { open: false });
+
+  assert.throws(() => {
+    db.createTagStore(10);
+  }, {
+    code: 'ERR_INVALID_STATE',
+    message: 'database is not open'
+  });
+});
+
 test('sql.run inserts data', () => {
   assert.strictEqual(sql.run`INSERT INTO foo (text) VALUES (${'bob'})`.changes, 1);
   assert.strictEqual(sql.run`INSERT INTO foo (text) VALUES (${'mac'})`.changes, 1);