manifest_xml: unify bool & int parsing

We've been overly lenient with boolean parsing by ignoring invalid
values as "false" even if the user didn't intend that.  Turn all
unknown values into warnings to avoid breaking existing manifests,
and unify the parsing logic in a helper to simplify.

We've been stricter about numbers, but still copying & pasting
inconsistent code.  Add a helper for this too.  For out of range
sync-j numbers (i.e. less than 1), throw a warning for now, but
mark it for future hard failures.

Change-Id: I924162b8036e6a5f1e31b6ebb24b6a26ed63712d
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/256457
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Tested-by: Mike Frysinger <vapier@google.com>

tests/test_manifest_xml.py

@@ -20,6 +20,7 @@ from __future__ import print_function
 
 import os
 import unittest
+import xml.dom.minidom
 
 import error
 import manifest_xml
@@ -89,3 +90,59 @@ class ManifestValidateFilePaths(unittest.TestCase):
           error.ManifestInvalidPathError, self.check_both, path, 'a')
       self.assertRaises(
           error.ManifestInvalidPathError, self.check_both, 'a', path)
+
+
+class ValueTests(unittest.TestCase):
+  """Check utility parsing code."""
+
+  def _get_node(self, text):
+    return xml.dom.minidom.parseString(text).firstChild
+
+  def test_bool_default(self):
+    """Check XmlBool default handling."""
+    node = self._get_node('<node/>')
+    self.assertIsNone(manifest_xml.XmlBool(node, 'a'))
+    self.assertIsNone(manifest_xml.XmlBool(node, 'a', None))
+    self.assertEqual(123, manifest_xml.XmlBool(node, 'a', 123))
+
+    node = self._get_node('<node a=""/>')
+    self.assertIsNone(manifest_xml.XmlBool(node, 'a'))
+
+  def test_bool_invalid(self):
+    """Check XmlBool invalid handling."""
+    node = self._get_node('<node a="moo"/>')
+    self.assertEqual(123, manifest_xml.XmlBool(node, 'a', 123))
+
+  def test_bool_true(self):
+    """Check XmlBool true values."""
+    for value in ('yes', 'true', '1'):
+      node = self._get_node('<node a="%s"/>' % (value,))
+      self.assertTrue(manifest_xml.XmlBool(node, 'a'))
+
+  def test_bool_false(self):
+    """Check XmlBool false values."""
+    for value in ('no', 'false', '0'):
+      node = self._get_node('<node a="%s"/>' % (value,))
+      self.assertFalse(manifest_xml.XmlBool(node, 'a'))
+
+  def test_int_default(self):
+    """Check XmlInt default handling."""
+    node = self._get_node('<node/>')
+    self.assertIsNone(manifest_xml.XmlInt(node, 'a'))
+    self.assertIsNone(manifest_xml.XmlInt(node, 'a', None))
+    self.assertEqual(123, manifest_xml.XmlInt(node, 'a', 123))
+
+    node = self._get_node('<node a=""/>')
+    self.assertIsNone(manifest_xml.XmlInt(node, 'a'))
+
+  def test_int_good(self):
+    """Check XmlInt numeric handling."""
+    for value in (-1, 0, 1, 50000):
+      node = self._get_node('<node a="%s"/>' % (value,))
+      self.assertEqual(value, manifest_xml.XmlInt(node, 'a'))
+
+  def test_int_invalid(self):
+    """Check XmlInt invalid handling."""
+    with self.assertRaises(error.ManifestParseError):
+      node = self._get_node('<node a="xx"/>')
+      manifest_xml.XmlInt(node, 'a')