add test for passing stringifyObjects via options to tag handler

Author: mikesamuel

lib/es6/Template.js

@@ -57,7 +57,7 @@ function computeStatic (strings) {
 }
 
 function interpolateSqlIntoFragment (
-  { stringifyObjects, timeZone } = {},
+  { stringifyObjects, timeZone },
   { raw, delimiters, chunks },
   strings, values) {
   // A buffer to accumulate output.

test/unit/es6/Template.js

@@ -26,15 +26,30 @@ test('template tag', {
       () => sql`SELECT ${1 + 1}`);
   },
   'date': function () {
+    const date = new Date(Date.UTC(2000, 0, 1, 0, 0, 0));
     runTagTest(
       `SELECT '2000-01-01 00:00:00.000'`,
-      () => sql({ timeZone: 'GMT' })`SELECT ${new Date(Date.UTC(2000, 0, 1, 0, 0, 0))}`);
+      () => sql({ timeZone: 'GMT' })`SELECT ${date}`);
   },
   'string': function () {
     runTagTest(
       `SELECT 'Hello, World!\\n'`,
       () => sql`SELECT ${'Hello, World!\n'}`);
   },
+  'stringify': function () {
+    const obj = {
+      'Hello': 'World!',
+      toString: function () {
+        return 'Hello, World!';
+      }
+    };
+    runTagTest(
+      `SELECT 'Hello, World!'`,
+      () => sql({ stringifyObjects: true })`SELECT ${obj}`);
+    runTagTest(
+      'SELECT * FROM t WHERE `Hello` = \'World!\'',
+      () => sql({ stringifyObjects: false })`SELECT * FROM t WHERE ${obj}`);
+  },
   'identifier': function () {
     runTagTest(
       'SELECT `foo`',
@@ -139,4 +154,7 @@ test('template tag', {
     // See comments in lib/es6/Lexer.js.
     assert.throws(() => sql`SELECT (${0}) -- comment`);
   }
+
+  // TODO: is there a token-merging hazard in sql`SELECT 'x'${'y'}`?
+  // A literal ' shows up in the decoded output of a single string literal.
 });