context: add support for LYD_VALIDATE_MULTI_ERROR

Thanks to the LYD_VALIDATE_MULTI_ERROR, the validation does not stop at
the first error, but generates all the detected errors.

Add a dedicated test.

Fixes: #79
Signed-off-by: Sergei Markov <semarkov@cisco.com>
Signed-off-by: Samuel Gauthier <samuel.gauthier@6wind.com>

Author: smark28

cffi/cdefs.h

@@ -314,6 +314,7 @@ LY_ERR lyd_print_all(struct ly_out *, const struct lyd_node *, LYD_FORMAT, uint3
 #define LYD_VALIDATE_NO_STATE ...
 #define LYD_VALIDATE_PRESENT ...
 #define LYD_VALIDATE_OPTS_MASK ...
+#define LYD_VALIDATE_MULTI_ERROR ...
 
 LY_ERR lyd_parse_data_mem(const struct ly_ctx *, const char *, LYD_FORMAT, uint32_t, uint32_t, struct lyd_node **);
 

libyang/context.py

@@ -339,6 +339,7 @@ def parse_data(
         ordered: bool = False,
         strict: bool = False,
         validate_present: bool = False,
+        validate_multi_error: bool = False,
     ) -> Optional[DNode]:
         if self.cdata is None:
             raise RuntimeError("context already destroyed")
@@ -351,7 +352,9 @@ def parse_data(
             strict=strict,
         )
         validation_flgs = validation_flags(
-            no_state=no_state, validate_present=validate_present
+            no_state=no_state,
+            validate_present=validate_present,
+            validate_multi_error=validate_multi_error,
         )
         fmt = data_format(fmt)
         encode = True
@@ -403,6 +406,7 @@ def parse_data_mem(
         ordered: bool = False,
         strict: bool = False,
         validate_present: bool = False,
+        validate_multi_error: bool = False,
     ) -> Optional[DNode]:
         return self.parse_data(
             fmt,
@@ -416,6 +420,7 @@ def parse_data_mem(
             ordered=ordered,
             strict=strict,
             validate_present=validate_present,
+            validate_multi_error=validate_multi_error,
         )
 
     def parse_data_file(
@@ -430,6 +435,7 @@ def parse_data_file(
         ordered: bool = False,
         strict: bool = False,
         validate_present: bool = False,
+        validate_multi_error: bool = False,
     ) -> Optional[DNode]:
         return self.parse_data(
             fmt,
@@ -443,6 +449,7 @@ def parse_data_file(
             ordered=ordered,
             strict=strict,
             validate_present=validate_present,
+            validate_multi_error=validate_multi_error,
         )
 
     def __iter__(self) -> Iterator[Module]:

libyang/data.py

@@ -171,12 +171,15 @@ def data_type(dtype):
 def validation_flags(
     no_state: bool = False,
     validate_present: bool = False,
+    validate_multi_error: bool = False,
 ) -> int:
     flags = 0
     if no_state:
         flags |= lib.LYD_VALIDATE_NO_STATE
     if validate_present:
         flags |= lib.LYD_VALIDATE_PRESENT
+    if validate_multi_error:
+        flags |= lib.LYD_VALIDATE_MULTI_ERROR
     return flags
 
 

tests/test_data.py

@@ -256,6 +256,31 @@ def test_data_parse_config_xml(self):
         finally:
             dnode.free()
 
+    XML_CONFIG_MULTI_ERROR = """<conf xmlns="urn:yang:yolo:system">
+  <hostname>foo</hostname>
+  <url>
+    <proto>https</proto>
+    <path>/CESNET/libyang-python</path>
+    <enabled>abcd</enabled>
+  </url>
+  <number>2000</number>
+</conf>
+"""
+
+    def test_data_parse_config_xml_multi_error(self):
+        with self.assertRaises(Exception) as cm:
+            self.ctx.parse_data_mem(
+                self.XML_CONFIG_MULTI_ERROR,
+                "xml",
+                validate_present=True,
+                validate_multi_error=True,
+            )
+        self.assertEqual(
+            str(cm.exception),
+            'failed to parse data tree: Invalid boolean value "abcd".: '
+            'List instance is missing its key "host".',
+        )
+
     XML_STATE = """<state xmlns="urn:yang:yolo:system">
   <hostname>foo</hostname>
   <url>