sqlite: add DatabaseSync.prototype.isOpen

doc/api/sqlite.md

@@ -198,6 +198,14 @@ added:
 This method is used to create SQLite user-defined functions. This method is a
 wrapper around [`sqlite3_create_function_v2()`][].
 
+### `database.isOpen`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+* {boolean} Whether the database is currently open or not.
+
 ### `database.open()`
 
 <!-- YAML

src/node_sqlite.cc

@@ -757,6 +757,12 @@ void DatabaseSync::Open(const FunctionCallbackInfo<Value>& args) {
   db->Open();
 }
 
+void DatabaseSync::IsOpenGetter(const FunctionCallbackInfo<Value>& args) {
+  DatabaseSync* db;
+  ASSIGN_OR_RETURN_UNWRAP(&db, args.This());
+  args.GetReturnValue().Set(db->IsOpen());
+}
+
 void DatabaseSync::Close(const FunctionCallbackInfo<Value>& args) {
   DatabaseSync* db;
   ASSIGN_OR_RETURN_UNWRAP(&db, args.This());
@@ -2169,6 +2175,10 @@ static void Initialize(Local<Object> target,
                  DatabaseSync::EnableLoadExtension);
   SetProtoMethod(
       isolate, db_tmpl, "loadExtension", DatabaseSync::LoadExtension);
+  SetSideEffectFreeGetter(isolate,
+                          db_tmpl,
+                          FIXED_ONE_BYTE_STRING(isolate, "isOpen"),
+                          DatabaseSync::IsOpenGetter);
   SetConstructorFunction(context, target, "DatabaseSync", db_tmpl);
   SetConstructorFunction(context,
                          target,

src/node_sqlite.h

@@ -55,6 +55,7 @@ class DatabaseSync : public BaseObject {
   void MemoryInfo(MemoryTracker* tracker) const override;
   static void New(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Open(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void IsOpenGetter(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Close(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Prepare(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Exec(const v8::FunctionCallbackInfo<v8::Value>& args);

test/parallel/test-sqlite-database-sync.js

@@ -172,41 +172,50 @@ suite('DatabaseSync.prototype.open()', () => {
     const db = new DatabaseSync(dbPath, { open: false });
     t.after(() => { db.close(); });
 
+    t.assert.strictEqual(db.isOpen, false);
     t.assert.strictEqual(existsSync(dbPath), false);
     t.assert.strictEqual(db.open(), undefined);
+    t.assert.strictEqual(db.isOpen, true);
     t.assert.strictEqual(existsSync(dbPath), true);
   });
 
   test('throws if database is already open', (t) => {
     const db = new DatabaseSync(nextDb(), { open: false });
     t.after(() => { db.close(); });
 
+    t.assert.strictEqual(db.isOpen, false);
     db.open();
+    t.assert.strictEqual(db.isOpen, true);
     t.assert.throws(() => {
       db.open();
     }, {
       code: 'ERR_INVALID_STATE',
       message: /database is already open/,
     });
+    t.assert.strictEqual(db.isOpen, true);
   });
 });
 
 suite('DatabaseSync.prototype.close()', () => {
   test('closes an open database connection', (t) => {
     const db = new DatabaseSync(nextDb());
 
+    t.assert.strictEqual(db.isOpen, true);
     t.assert.strictEqual(db.close(), undefined);
+    t.assert.strictEqual(db.isOpen, false);
   });
 
   test('throws if database is not open', (t) => {
     const db = new DatabaseSync(nextDb(), { open: false });
 
+    t.assert.strictEqual(db.isOpen, false);
     t.assert.throws(() => {
       db.close();
     }, {
       code: 'ERR_INVALID_STATE',
       message: /database is not open/,
     });
+    t.assert.strictEqual(db.isOpen, false);
   });
 });