fix: Resolve TypeScript errors

Signed-off-by: Hermes Agent <hermes@nosuchhost>

client/node_modules/abstract-leveldown/test/open-test.js

@@ -0,0 +1,79 @@
+exports.setUp = function (test, testCommon) {
+  test('setUp', testCommon.setUp)
+}
+
+exports.args = function (test, testCommon) {
+  test('test database open no-arg throws', function (t) {
+    var db = testCommon.factory()
+    t.throws(
+      db.open.bind(db),
+      /Error: open\(\) requires a callback argument/,
+      'no-arg open() throws'
+    )
+    t.end()
+  })
+
+  test('test callback-less, 1-arg, open() throws', function (t) {
+    var db = testCommon.factory()
+    t.throws(
+      db.open.bind(db, {}),
+      /Error: open\(\) requires a callback argument/,
+      'callback-less, 1-arg open() throws'
+    )
+    t.end()
+  })
+}
+
+exports.open = function (test, testCommon) {
+  test('test database open, no options', function (t) {
+    var db = testCommon.factory()
+
+    // default createIfMissing=true, errorIfExists=false
+    db.open(function (err) {
+      t.error(err)
+      db.close(function () {
+        t.end()
+      })
+    })
+  })
+
+  test('test database open, options and callback', function (t) {
+    var db = testCommon.factory()
+
+    // default createIfMissing=true, errorIfExists=false
+    db.open({}, function (err) {
+      t.error(err)
+      db.close(function () {
+        t.end()
+      })
+    })
+  })
+
+  test('test database open, close and open', function (t) {
+    var db = testCommon.factory()
+
+    db.open(function (err) {
+      t.error(err)
+      db.close(function (err) {
+        t.error(err)
+        db.open(function (err) {
+          t.error(err)
+          db.close(function () {
+            t.end()
+          })
+        })
+      })
+    })
+  })
+}
+
+exports.tearDown = function (test, testCommon) {
+  test('tearDown', testCommon.tearDown)
+}
+
+exports.all = function (test, testCommon) {
+  exports.setUp(test, testCommon)
+  exports.args(test, testCommon)
+  exports.open(test, testCommon)
+  exports.tearDown(test, testCommon)
+}