Add tests for string contexts

Fixes #1013

spec/basic.js

@@ -22,6 +22,10 @@ describe('basic context', function() {
                     'It works if all the required keys are provided');
   });
 
+  it('compiling with a string context', function() {
+    shouldCompileTo('{{.}}{{length}}', 'bye', 'bye3');
+  });
+
   it('compiling with an undefined context', function() {
     shouldCompileTo('Goodbye\n{{cruel}}\n{{world.bar}}!', undefined, 'Goodbye\n\n!');
 

spec/partials.js

@@ -41,6 +41,13 @@ describe('partials', function() {
                     'Partials can be passed a context');
   });
 
+  it('partials with string context', function() {
+    var string = 'Dudes: {{>dude "dudes"}}';
+    var partial = '{{.}}';
+    var hash = {};
+    shouldCompileToWithPartials(string, [hash, {}, {dude: partial}], true, 'Dudes: dudes');
+  });
+
   it('partials with undefined context', function() {
     var string = 'Dudes: {{>dude dudes}}';
     var partial = '{{foo}} Empty';