Telemetry Pages support AsDict()

We will be using the AsDict() call to support JSON output of Telemetry results.
This CL adds the ability to output the important information associated with a
page to the Telemetry Page class.

BUG=375541

Review URL: https://codereview.chromium.org/388653002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282776 0039d316-1c4b-4281-b951-d872f2087c98

tools/telemetry/telemetry/page/page.py

@@ -57,6 +57,16 @@ class Page(object):
     assert browser_info
     return True
 
+  def AsDict(self):
+    """Converts a page object to a dict suitable for JSON output."""
+    d = {
+      'id': self._id,
+      'url': self._url,
+    }
+    if self._name:
+      d['name'] = self._name
+    return d
+
   @property
   def page_set(self):
     return self._page_set

tools/telemetry/telemetry/page/page_unittest.py

@@ -117,6 +117,23 @@ class TestPage(unittest.TestCase):
     self.assertEquals(ps[0].display_name, 'foo')
 
   def testPagesHaveDifferentIds(self):
-    p = page.Page("http://example.com")
-    p2 = page.Page("http://example.com")
-    self.assertNotEqual(p.id, p2.id)
+    p0 = page.Page("http://example.com")
+    p1 = page.Page("http://example.com")
+    self.assertNotEqual(p0.id, p1.id)
+
+  def testNamelessPageAsDict(self):
+    nameless_dict = page.Page('http://example.com/').AsDict()
+    self.assertIn('id', nameless_dict)
+    del nameless_dict['id']
+    self.assertEquals({
+          'url': 'http://example.com/',
+        }, nameless_dict)
+
+  def testNamedPageAsDict(self):
+    named_dict = page.Page('http://example.com/', name='Example').AsDict()
+    self.assertIn('id', named_dict)
+    del named_dict['id']
+    self.assertEquals({
+          'url': 'http://example.com/',
+          'name': 'Example'
+        }, named_dict)