Gracefully handle missing addons section

auslib/blobs/systemaddons.py

@@ -12,25 +12,23 @@ def __init__(self, **kwargs):
             self["schema_version"] = 5000
 
     def getAddonsForPlatform(self, platform):
-        for v in self["addons"]:
-            if platform in self["addons"][v]["platforms"] or "default" in self["addons"][v]["platforms"]:
+        for v in self.get("addons", {}):
+            platforms = self["addons"].get(v, {}).get("platforms", {})
+            if platform in platforms or "default" in platforms:
                 yield v
 
     def getResolvedPlatform(self, addon, platform):
-        if platform in self['addons'][addon]['platforms']:
-            return self['addons'][addon]['platforms'][platform].get('alias', platform)
-        if "default" in self['addons'][addon]['platforms']:
+        platforms = self.get("addons", {}).get(addon, {}).get("platforms", {})
+        if platform in platforms:
+            return self.get('addons', {}).get(addon, {}).get('platforms', {}).get(platform, {}).get('alias', platform)
+        if "default" in platforms:
             return "default"
         raise BadDataError("No platform '%s' or default in addon '%s'",
                            platform, addon)
 
     def getPlatformData(self, addon, platform):
         platform = self.getResolvedPlatform(addon, platform)
-        try:
-            return self['addons'][addon]['platforms'][platform]
-        except KeyError:
-            raise BadDataError("No platform '%s' in addon '%s'", platform,
-                               addon)
+        return self.get("addons", {}).get(addon, {}).get("platforms", {}).get(platform)
 
     def shouldServeUpdate(self, updateQuery):
         # SystemAddon updates should always be returned. It is the responsibility

auslib/test/blobs/test_systemaddons.py

@@ -65,6 +65,15 @@ def setUp(self):
     "hashFunction": "SHA512",
     "uninstall": true
 }
+""")
+        self.blob3 = SystemAddonsBlob()
+        self.blob3.loadJSON("""
+{
+    "name": "fake",
+    "schema_version": 5000,
+    "hashFunction": "SHA512",
+    "uninstall": false
+}
 """)
         self.empty_blob = SystemAddonsBlob()
         self.empty_blob.loadJSON("""
@@ -144,6 +153,28 @@ def testXMLWhenUninstall(self):
         self.assertEqual(returned_footer.strip(), expected_footer.strip())
         self.assertEqual(returned_footer, expected_footer)
 
+    def testXMLNoAddonsNoUninstallBlob(self):
+        updateQuery = {
+            "product": "gg", "version": "3", "buildID": "1",
+            "buildTarget": "p", "locale": "l", "channel": "a",
+            "osVersion": "a", "distribution": "a", "distVersion": "a",
+            "force": 0
+        }
+        returned_header = self.blob3.getInnerHeaderXML(updateQuery, "minor", self.whitelistedDomains, self.specialForceHosts)
+        returned = self.blob3.getInnerXML(updateQuery, "minor", self.whitelistedDomains, self.specialForceHosts)
+        returned_footer = self.blob3.getInnerFooterXML(updateQuery, "minor",
+                                                       self.whitelistedDomains,
+                                                       self.specialForceHosts)
+        returned = [x.strip() for x in returned]
+        expected_header = ""
+        expected = []
+        expected = [x.strip() for x in expected]
+        expected_footer = ""
+        self.assertEqual(returned_header.strip(), expected_header.strip())
+        self.assertItemsEqual(returned, expected)
+        self.assertEqual(returned_footer.strip(), expected_footer.strip())
+        self.assertEqual(returned_footer, expected_footer)
+
     def testContainsForbiddenDomain(self):
         blob = SystemAddonsBlob()
         blob.loadJSON("""