fix(pg): throw on invalid Date instead of serializing NaN string

packages/pg/lib/utils.js

@@ -64,6 +64,9 @@ const prepareValue = function (val, seen) {
       return buf.slice(val.byteOffset, val.byteOffset + val.byteLength) // Node.js v4 does not support those Buffer.from params
     }
     if (isDate(val)) {
+      if (isNaN(val.getTime())) {
+        throw new Error('date is invalid')
+      }
       if (defaults.parseInputDatesAsUTC) {
         return dateToStringUTC(val)
       } else {

packages/pg/test/unit/utils-tests.js

@@ -94,6 +94,22 @@
   assert.strictEqual(out, null)
 })
 
+test('prepareValues: invalid date throws an error', function () {
+  const invalidDate = new Date(undefined)
+  assert.throws(
+    () => utils.prepareValue(invalidDate),
+    /date is invalid/
+  )
+})
+
+test('prepareValues: invalid date (NaN) does not produce NaN string', function () {
+  const invalidDate = new Date('not a date')
+  assert.throws(
+    () => utils.prepareValue(invalidDate),
+    /date is invalid/
+  )
+})
+
 test('prepareValue: null prepared properly', function () {
   const out = utils.prepareValue(null)
   assert.strictEqual(out, null)