Add a test that asserts that TP_ERRORS contains every error defined by the spec

Now that we don't auto-generate TP_ERRORS, we need to verify that
errors added in the spec get added to the TpError enum by the
maintainer when a new spec is imported. This is done by generating
a test that will be run during `make check`.

Sample output:

  /* org.freedesktop.Telepathy.Error.Busy */
  value_by_name = g_enum_get_value_by_name (klass, "TP_ERROR_BUSY");
  value_by_nick = g_enum_get_value_by_nick (klass, "Busy");
  g_assert (value_by_name != NULL);
  g_assert (value_by_nick != NULL);
  g_assert_cmpint (value_by_name->value, ==, TP_ERROR_BUSY);
  g_assert_cmpint (value_by_nick->value, ==, TP_ERROR_BUSY);
  g_assert_cmpstr (value_by_name->value_name, ==, "TP_ERROR_BUSY");
  g_assert_cmpstr (value_by_nick->value_name, ==, "TP_ERROR_BUSY");
  g_assert_cmpstr (value_by_name->value_nick, ==, "Busy");
  g_assert_cmpstr (value_by_nick->value_nick, ==, "Busy");

2 files changed, 55 insertions, 0 deletions

diff --git a/tools/Makefile.am b/tools/Makefile.am
index 4af909ae5..4d4447157 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -16,6 +16,7 @@ EXTRA_DIST = \
     git-which-branch.sh \
     glib-client-gen.py \
     glib-client-marshaller-gen.py \
+    glib-errors-check-gen.py \
     glib-errors-enum-body-gen.py \
     glib-errors-enum-header-gen.py \
     glib-ginterface-gen.py \
diff --git a/tools/glib-errors-check-gen.py b/tools/glib-errors-check-gen.py
new file mode 100644
index 000000000..3d16b8e98
--- /dev/null
+++ b/tools/glib-errors-check-gen.py
@@ -0,0 +1,54 @@
+#!/usr/bin/python
+
+import sys
+import xml.dom.minidom
+
+from libglibcodegen import NS_TP, camelcase_to_upper, get_docstring, \
+        get_descendant_text
+
+class Generator(object):
+    def __init__(self, dom):
+        self.dom = dom
+        self.errors = self.dom.getElementsByTagNameNS(NS_TP, 'errors')[0]
+
+    def __call__(self):
+
+        print '{'
+        print '  GEnumClass *klass;'
+        print '  GEnumValue *value_by_name;'
+        print '  GEnumValue *value_by_nick;'
+        print ''
+        print '  g_type_init ();'
+        print '  klass = g_type_class_ref (TP_TYPE_ERROR);'
+
+        for error in self.errors.getElementsByTagNameNS(NS_TP, 'error'):
+            ns = error.parentNode.getAttribute('namespace')
+            nick = error.getAttribute('name').replace(' ', '')
+            enum = 'TP_ERROR_' + camelcase_to_upper(nick.replace('.', ''))
+
+            print ''
+            print '  /* %s.%s */' % (ns, nick)
+            print ('  value_by_name = g_enum_get_value_by_name (klass, "%s");'
+                    % enum)
+            print ('  value_by_nick = g_enum_get_value_by_nick (klass, "%s");'
+                    % nick)
+            print ('  g_assert (value_by_name != NULL);')
+            print ('  g_assert (value_by_nick != NULL);')
+            print ('  g_assert_cmpint (value_by_name->value, ==, %s);'
+                    % enum)
+            print ('  g_assert_cmpint (value_by_nick->value, ==, %s);'
+                    % enum)
+            print ('  g_assert_cmpstr (value_by_name->value_name, ==, "%s");'
+                    % enum)
+            print ('  g_assert_cmpstr (value_by_nick->value_name, ==, "%s");'
+                    % enum)
+            print ('  g_assert_cmpstr (value_by_name->value_nick, ==, "%s");'
+                    % nick)
+            print ('  g_assert_cmpstr (value_by_nick->value_nick, ==, "%s");'
+                    % nick)
+
+        print '}'
+
+if __name__ == '__main__':
+    argv = sys.argv[1:]
+    Generator(xml.dom.minidom.parse(argv[0]))()