Empty string values return invalid conversion

[tylerturdenpants]

One of the tests from https://github.com/ember-codemods/ember-angle-brackets-codemod/

Before ember-template-recast (correct)

input: {{foo/bar name=""}}
output: <Foo::Bar @name="" />

After ember-template-recast refactor (incorrect)

input: {{foo/bar name=""}}
output: <Foo::Bar @name= />

[rwjblue]

Mind making a failing test for this? I think something akin to

ember-template-recast/tests/parse-result-test.js

Lines 41 to 53 in 14f1ef9

	QUnit.test('adding attribute when none originally existed', function(assert) {
	let template = stripIndent`
	<div></div>`;
	let ast = parse(template);
	ast.body[0].attributes.push(builders.attr('data-test', builders.string('wheee')));
	assert.equal(
	print(ast),
	stripIndent`
	<div data-test="wheee"></div>`
	);
	});

    QUnit.test('adding attribute with an empty string value', function(assert) {
      let template = `<Foo></Foo>`;

      let ast = parse(template);
      ast.body[0].attributes.push(builders.attr('@name', builders.string('')));

      assert.equal(
        print(ast),
        stripIndent`
        <Foo @name=""></Foo>`
      );
    });

---

I'm not 100% sure what the right path forward is here. Specifically, for an ElementNode we can not easily determine the difference between <input disabled> and <input value=""> (both are represented in the AST as AttrNodes with an empty string as the value).

[tylerturdenpants]

This is working now. Some changes were needed when moving from glimmer printer/parse/transform to ember-template-recast