Enhanced tosca validation

Using new exception class instead of built-in exception types.
Added validation for tosca template field names.

Partially implements: blueprint tosca-validation
Implements: blueprint check-key-definition

Change-Id: Ib6aadffc8922154f5b86da29ea29c9b603f4cfd8

translator/toscalib/common/exception.py

@@ -0,0 +1,74 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+'''
+TOSCA exception classes
+'''
+import logging
+import sys
+
+from translator.toscalib.utils.gettextutils import _
+
+
+log = logging.getLogger(__name__)
+
+
+class TOSCAException(Exception):
+    '''Base exception class for TOSCA
+
+    To correctly use this class, inherit from it and define
+    a 'msg_fmt' property.
+
+    '''
+
+    _FATAL_EXCEPTION_FORMAT_ERRORS = False
+
+    message = _('An unknown exception occurred.')
+
+    def __init__(self, **kwargs):
+        try:
+            self.message = self.msg_fmt % kwargs
+        except KeyError:
+            exc_info = sys.exc_info()
+            log.exception(_('Exception in string format operation: %s')
+                          % exc_info[1])
+
+            if TOSCAException._FATAL_EXCEPTION_FORMAT_ERRORS:
+                raise exc_info[0]
+
+    def __str__(self):
+        return self.message
+
+    @staticmethod
+    def set_fatal_format_exception(flag):
+        if isinstance(flag, bool):
+            TOSCAException._FATAL_EXCEPTION_FORMAT_ERRORS = flag
+
+
+class MissingRequiredFieldError(TOSCAException):
+    msg_fmt = _('%(what)s is missing required field: "%(required)s".')
+
+
+class UnknownFieldError(TOSCAException):
+    msg_fmt = _('%(what)s contain(s) unknown field: "%(field)s", '
+                'refer to the TOSCA specs to verify valid values.')
+
+
+class TypeMismatchError(TOSCAException):
+    msg_fmt = _('%(what)s must be of type: "%(type)s".')
+
+
+class InvalidNodeTypeError(TOSCAException):
+    msg_fmt = _('Node type "%(what)s" is not a valid type.')

translator/toscalib/elements/interfaces.py

@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from translator.toscalib.common.exception import UnknownFieldError
 from translator.toscalib.elements.statefulentitytype import StatefulEntityType
 from translator.toscalib.functions import get_function
 
@@ -20,6 +21,8 @@ SECTIONS = (LIFECYCLE, CONFIGURE) = \
            ('tosca.interfaces.node.Lifecycle',
             'tosca.interfaces.relationship.Configure')
 
+INTERFACEVALUE = (IMPLEMENTATION, INPUT) = ('implementation', 'input')
+
 
 class InterfacesDef(StatefulEntityType):
     '''TOSCA built-in interfaces type.'''
@@ -41,8 +44,12 @@ class InterfacesDef(StatefulEntityType):
                 for i, j in self.value.items():
                     if i == 'implementation':
                         self.implementation = j
-                    if i == 'input':
+                    elif i == 'input':
                         self.input = self._create_input_functions(j)
+                    else:
+                        what = ('Interfaces of node template %s' %
+                                self.node_template.name)
+                        raise UnknownFieldError(what=what, field=i)
             else:
                 self.implementation = value
 

translator/toscalib/elements/nodetype.py

@@ -13,12 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from translator.toscalib.common.exception import InvalidNodeTypeError
 from translator.toscalib.elements.capabilitytype import CapabilityTypeDef
 from translator.toscalib.elements.interfaces import InterfacesDef
 from translator.toscalib.elements.property_definition import PropertyDef
 from translator.toscalib.elements.relationshiptype import RelationshipType
 from translator.toscalib.elements.statefulentitytype import StatefulEntityType
-from translator.toscalib.utils.gettextutils import _
 
 
 SECTIONS = (DERIVED_FROM, PROPERTIES, REQUIREMENTS,
@@ -37,8 +37,7 @@ class NodeType(StatefulEntityType):
         elif custom_def and ntype in list(custom_def.keys()):
             self.defs = custom_def[ntype]
         else:
-            raise ValueError(_('Node type %(ntype)s is not a valid type.')
+            raise InvalidNodeTypeError(what=ntype)
-                             % {'ntype': ntype})
         self.type = ntype
         self.related = {}
 
@@ -69,16 +68,7 @@ class NodeType(StatefulEntityType):
 
         '''
         relationship = {}
-        requires = self.requirements
+        requires = self.get_all_requirements()
-        parent_node = self.parent_type
-        if requires is None:
-            requires = self.get_value(REQUIREMENTS, None, True)
-            parent_node = parent_node.parent_type
-        if parent_node:
-            while parent_node.type != 'tosca.nodes.Root':
-                req = parent_node.get_value(REQUIREMENTS, None, True)
-                requires.extend(req)
-                parent_node = parent_node.parent_type
         if requires:
             for req in requires:
                 for key, value in req.items():
@@ -128,6 +118,19 @@ class NodeType(StatefulEntityType):
     def requirements(self):
         return self.get_value(REQUIREMENTS)
 
+    def get_all_requirements(self):
+        requires = self.requirements
+        parent_node = self.parent_type
+        if requires is None:
+            requires = self.get_value(REQUIREMENTS, None, True)
+            parent_node = parent_node.parent_type
+        if parent_node:
+            while parent_node.type != 'tosca.nodes.Root':
+                req = parent_node.get_value(REQUIREMENTS, None, True)
+                requires.extend(req)
+                parent_node = parent_node.parent_type
+        return requires
+
     @property
     def interfaces(self):
         return self.get_value(INTERFACES)

translator/toscalib/nodetemplate.py

@@ -16,16 +16,20 @@
 
 import logging
 
+from translator.toscalib.common.exception import MissingRequiredFieldError
+from translator.toscalib.common.exception import TypeMismatchError
+from translator.toscalib.common.exception import UnknownFieldError
 from translator.toscalib.elements.capabilitytype import CapabilityTypeDef
 from translator.toscalib.elements.interfaces import InterfacesDef
+from translator.toscalib.elements.interfaces import LIFECYCLE, CONFIGURE
 from translator.toscalib.elements.nodetype import NodeType
 from translator.toscalib.properties import Property
-from translator.toscalib.utils.gettextutils import _
+
 
 SECTIONS = (DERIVED_FROM, PROPERTIES, REQUIREMENTS,
-            INTERFACES, CAPABILITIES) = \
+            INTERFACES, CAPABILITIES, TYPE) = \
            ('derived_from', 'properties', 'requirements', 'interfaces',
-            'capabilities')
+            'capabilities', 'type')
 
 log = logging.getLogger('tosca')
 
@@ -34,10 +38,11 @@ class NodeTemplate(object):
     '''Node template from a Tosca profile.'''
     def __init__(self, name, node_templates, custom_def=None):
         self.name = name
-        self.node_type = NodeType(node_templates[name]['type'], custom_def)
         self.node_templates = node_templates
+        self._validate_field()
         self.node_template = node_templates[self.name]
-        self.type = self.node_template['type']
+        self.type = self.node_template[TYPE]
+        self.node_type = NodeType(self.type, custom_def)
         self.related = {}
 
     @property
@@ -95,30 +100,12 @@ class NodeTemplate(object):
     def properties(self):
         props = []
         properties = self.node_type.get_value(PROPERTIES, self.node_template)
-        requiredprop = []
-        for p in self.node_type.properties_def:
-            if p.required:
-                requiredprop.append(p.name)
         if properties:
-            #make sure it's not missing any property required by a node type
-            missingprop = []
-            for r in requiredprop:
-                if r not in properties.keys():
-                    missingprop.append(r)
-            if missingprop:
-                raise ValueError(_("Node template %(tpl)s is missing "
-                                   "one or more required properties %(prop)s")
-                                 % {'tpl': self.name, 'prop': missingprop})
             for name, value in properties.items():
                 for p in self.node_type.properties_def:
                     if p.name == name:
                         prop = Property(name, value, p.schema)
                         props.append(prop)
-        else:
-            if requiredprop:
-                raise ValueError(_("Node template %(tpl)s is missing"
-                                   "one or more required properties %(prop)s")
-                                 % {'tpl': self.name, 'prop': requiredprop})
         return props
 
     def _add_next(self, nodetpl, relationship):
@@ -151,5 +138,103 @@ class NodeTemplate(object):
                             return c.property_value
 
     def validate(self):
+        self._validate_capabilities()
+        self._validate_requirments()
+        self._validate_properties()
+        self._validate_interfaces()
         for prop in self.properties:
             prop.validate()
+
+    def _validate_capabilities(self):
+        type_capabilities = self.node_type.capabilities
+        allowed_caps = []
+        if type_capabilities:
+            for tcap in type_capabilities:
+                allowed_caps.append(tcap.name)
+        capabilities = self.node_type.get_value(CAPABILITIES,
+                                                self.node_template)
+        if capabilities:
+            self._common_validate_field(capabilities, allowed_caps,
+                                        'Capabilities')
+
+    def _validate_requirments(self):
+        type_requires = self.node_type.get_all_requirements()
+        allowed_reqs = []
+        if type_requires:
+            for treq in type_requires:
+                for key in treq:
+                    allowed_reqs.append(key)
+        requires = self.node_type.get_value(REQUIREMENTS, self.node_template)
+        if requires:
+            if not isinstance(requires, list):
+                raise TypeMismatchError(
+                    what='Requirements of node template %s' % self.name,
+                    type='list')
+            for req in requires:
+                self._common_validate_field(req, allowed_reqs, 'Requirements')
+
+    def _validate_interfaces(self):
+        ifaces = self.node_type.get_value(INTERFACES, self.node_template)
+        if ifaces:
+            for i in ifaces:
+                for name, value in ifaces.items():
+                    if name == LIFECYCLE:
+                        self._common_validate_field(
+                            value, InterfacesDef.
+                            interfaces_node_lifecycle_operations,
+                            'Interfaces')
+                    elif name == CONFIGURE:
+                        self._common_validate_field(
+                            value, InterfacesDef.
+                            interfaces_relationship_confiure_operations,
+                            'Interfaces')
+                    else:
+                        raise UnknownFieldError(
+                            what='Interfaces of node template %s' % self.name,
+                            field=name)
+
+    def _validate_properties(self):
+        properties = self.node_type.get_value(PROPERTIES, self.node_template)
+        allowed_props = []
+        required_props = []
+        for p in self.node_type.properties_def:
+            allowed_props.append(p.name)
+            if p.required:
+                required_props.append(p.name)
+        if properties:
+            self._common_validate_field(properties, allowed_props,
+                                        'Properties')
+            #make sure it's not missing any property required by a node type
+            missingprop = []
+            for r in required_props:
+                if r not in properties.keys():
+                    missingprop.append(r)
+            if missingprop:
+                raise MissingRequiredFieldError(
+                    what='Properties of node template %s' % self.name,
+                    required=missingprop)
+        else:
+            if required_props:
+                raise MissingRequiredFieldError(
+                    what='Properties of node template %s' % self.name,
+                    required=missingprop)
+
+    def _validate_field(self):
+        if not isinstance(self.node_templates[self.name], dict):
+            raise MissingRequiredFieldError(
+                what='Node template %s' % self.name, required=TYPE)
+        try:
+            self.node_templates[self.name][TYPE]
+        except KeyError:
+            raise MissingRequiredFieldError(
+                what='Node template %s' % self.name, required=TYPE)
+        self._common_validate_field(self.node_templates[self.name], SECTIONS,
+                                    'Second level')
+
+    def _common_validate_field(self, schema, allowedlist, section):
+        for name in schema:
+            if name not in allowedlist:
+                raise UnknownFieldError(
+                    what='%(section)s of node template %(nodename)s'
+                    % {'section': section, 'nodename': self.name},
+                    field=name)

translator/toscalib/parameters.py

@@ -16,41 +16,63 @@
 
 import logging
 
+from translator.toscalib.common.exception import MissingRequiredFieldError
+from translator.toscalib.common.exception import UnknownFieldError
 from translator.toscalib.elements.constraints import Constraint
 from translator.toscalib.properties import Property
 
+
 log = logging.getLogger('tosca')
 
 
 class Input(object):
+
+    INPUTFIELD = (TYPE, DESCRIPTION, DEFAULT, CONSTRAINTS) = \
+        ('type', 'description', 'default', 'constraints')
+
     def __init__(self, name, schema):
         self.name = name
         self.schema = schema
 
     @property
     def type(self):
-        return self.schema['type']
+        return self.schema[self.TYPE]
 
     @property
     def description(self):
         if Property.DESCRIPTION in self.schema:
-            return self.schema['description']
+            return self.schema[self.DESCRIPTION]
 
     @property
     def default(self):
         if self.Property.DEFAULT in self.schema:
-            return self.schema['default']
+            return self.schema[self.DEFAULT]
 
     @property
     def constraints(self):
         if Property.CONSTRAINTS in self.schema:
-            return self.schema['constraints']
+            return self.schema[self.CONSTRAINTS]
 
     def validate(self):
+        self._validate_field()
         self.validate_type(self.type)
         if self.constraints:
             self.validate_constraints(self.constraints)
 
+    def _validate_field(self):
+        if not isinstance(self.schema, dict):
+            raise MissingRequiredFieldError(what='Input %s' % self.name,
+                                            required=self.TYPE)
+        try:
+            self.type
+        except KeyError:
+            raise MissingRequiredFieldError(what='Input %s' % self.name,
+                                            required=self.TYPE)
+        for name in self.schema:
+            if name not in self.INPUTFIELD:
+                raise UnknownFieldError(what='Input %s' % self.name,
+                                        field=name)
+
     def validate_type(self, input_type):
         if input_type not in Property.PROPERTIY_TYPES:
             raise ValueError(_('Invalid type %s') % type)
@@ -63,14 +85,34 @@ class Input(object):
 
 
 class Output(object):
+
+    OUTPUTFIELD = (DESCRIPTION, VALUE) = ('description', 'value')
+
     def __init__(self, name, attrs):
         self.name = name
         self.attrs = attrs
 
     @property
     def description(self):
-        return self.attrs['description']
+        return self.attrs[self.DESCRIPTION]
 
     @property
     def value(self):
-        return self.attrs['value']
+        return self.attrs[self.VALUE]
+
+    def validate(self):
+        self._validate_field()
+
+    def _validate_field(self):
+        if not isinstance(self.attrs, dict):
+            raise MissingRequiredFieldError(what='Output %s' % self.name,
+                                            required=self.VALUE)
+        try:
+            self.value
+        except KeyError:
+            raise MissingRequiredFieldError(what='Output %s' % self.name,
+                                            required=self.VALUE)
+        for name in self.attrs:
+            if name not in self.OUTPUTFIELD:
+                raise UnknownFieldError(what='Output %s' % self.name,
+                                        field=name)

translator/toscalib/tests/data/test_tosca_top_level_error1.yaml

@@ -0,0 +1,28 @@
+description: >
+  TOSCA simple profile missing version section.
+
+inputs:
+  cpus:
+    type: integer
+    description: Number of CPUs for the server.
+    constraints:
+      - valid_values: [ 1, 2, 4, 8 ]
+
+node_templates:
+  server:
+    type: tosca.nodes.Compute
+    properties:
+      # compute properties (flavor)
+      disk_size: 10
+      num_cpus: { get_input: cpus }
+      mem_size: 4096
+      # host image properties
+      os_arch: x86_64
+      os_type: Linux
+      os_distribution: Fedora
+      os_version: 18
+
+outputs:
+  server_address:
+    description: IP address of server instance.
+    value: { get_property: [server, ip_address] }

translator/toscalib/tests/data/test_tosca_top_level_error2.yaml

@@ -0,0 +1,30 @@
+tosca_definitions_version: tosca_simple_1.0
+
+description: >
+  TOSCA simple profile with invalid top-level key: 'node_template'.
+
+inputs:
+  cpus:
+    type: integer
+    description: Number of CPUs for the server.
+    constraints:
+      - valid_values: [ 1, 2, 4, 8 ]
+
+node_template:
+  server:
+    type: tosca.nodes.Compute
+    properties:
+      # compute properties (flavor)
+      disk_size: 10
+      num_cpus: { get_input: cpus }
+      mem_size: 4096
+      # host image properties
+      os_arch: x86_64
+      os_type: Linux
+      os_distribution: Fedora
+      os_version: 18
+
+outputs:
+  server_address:
+    description: IP address of server instance.
+    value: { get_property: [server, ip_address] }

translator/toscalib/tests/test_exception.py

@@ -0,0 +1,44 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from translator.toscalib.common.exception import MissingRequiredFieldError
+from translator.toscalib.common.exception import TOSCAException
+from translator.toscalib.common.exception import UnknownFieldError
+from translator.toscalib.tests.base import TestCase
+
+
+class ExceptionTest(TestCase):
+
+    def setUp(self):
+        super(TestCase, self).setUp()
+        TOSCAException.set_fatal_format_exception(False)
+
+    def test_message(self):
+        ex = MissingRequiredFieldError(what='Template', required='type')
+        self.assertEqual('Template is missing required field: "type".',
+                         ex.__str__())
+
+    def test_set_flag(self):
+        TOSCAException.set_fatal_format_exception('True')
+        self.assertFalse(TOSCAException._FATAL_EXCEPTION_FORMAT_ERRORS)
+
+    def test_format_error(self):
+        ex = UnknownFieldError(what='Template')
+        self.assertEqual('An unknown exception occurred.', ex.__str__(),)
+        self.assertRaises(KeyError, self._formate_exception)
+
+    def _formate_exception(self):
+        UnknownFieldError.set_fatal_format_exception(True)
+        raise UnknownFieldError(what='Template')

translator/toscalib/tests/test_toscadef.py

@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from translator.toscalib.common.exception import InvalidNodeTypeError
 from translator.toscalib.elements.nodetype import NodeType
 from translator.toscalib.tests.base import TestCase
 compute_type = NodeType('tosca.nodes.Compute')
@@ -22,7 +23,8 @@ component_type = NodeType('tosca.nodes.SoftwareComponent')
 class ToscaDefTest(TestCase):
     def test_type(self):
         self.assertEqual(compute_type.type, "tosca.nodes.Compute")
-        self.assertRaises(ValueError, NodeType, 'tosca.nodes.Invalid')
+        self.assertRaises(InvalidNodeTypeError, NodeType,
+                          'tosca.nodes.Invalid')
 
     def test_parent_type(self):
         self.assertEqual(compute_type.parent_type.type, "tosca.nodes.Root")

translator/toscalib/tests/test_toscatplvalidation.py

@@ -0,0 +1,430 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import os
+from translator.toscalib.common.exception import InvalidNodeTypeError
+from translator.toscalib.common.exception import MissingRequiredFieldError
+from translator.toscalib.common.exception import TypeMismatchError
+from translator.toscalib.common.exception import UnknownFieldError
+from translator.toscalib.nodetemplate import NodeTemplate
+from translator.toscalib.parameters import Input, Output
+from translator.toscalib.tests.base import TestCase
+from translator.toscalib.tosca_template import ToscaTemplate
+import translator.toscalib.utils.yamlparser
+
+
+class ToscaTemplateValidationTest(TestCase):
+
+    def test_well_defined_template(self):
+        tpl_path = os.path.join(
+            os.path.dirname(os.path.abspath(__file__)),
+            "data/tosca_single_instance_wordpress.yaml")
+        self.assertIsNotNone(ToscaTemplate(tpl_path))
+
+    def test_first_level_sections(self):
+        tpl_path = os.path.join(
+            os.path.dirname(os.path.abspath(__file__)),
+            "data/test_tosca_top_level_error1.yaml")
+        try:
+            ToscaTemplate(tpl_path)
+        except Exception as err:
+            self.assertTrue(isinstance(err, MissingRequiredFieldError))
+            self.assertEqual('Template is missing required field: '
+                             '"tosca_definitions_version".', err.__str__())
+
+        tpl_path = os.path.join(
+            os.path.dirname(os.path.abspath(__file__)),
+            "data/test_tosca_top_level_error2.yaml")
+        try:
+            ToscaTemplate(tpl_path)
+        except Exception as err:
+            self.assertTrue(isinstance(err, UnknownFieldError))
+            self.assertEqual('Template contain(s) unknown field: '
+                             '"node_template", refer to the TOSCA specs '
+                             'to verify valid values.', err.__str__())
+
+    def test_inputs(self):
+        tpl_snippet = '''
+        inputs:
+          cpus:
+            description: Number of CPUs for the server.
+            constraints:
+              - valid_values: [ 1, 2, 4, 8 ]
+        '''
+        inputs = (translator.toscalib.utils.yamlparser.
+                  simple_parse(tpl_snippet)['inputs'])
+        name, attrs = list(inputs.items())[0]
+        input = Input(name, attrs)
+        try:
+            input.validate()
+        except Exception as err:
+            self.assertTrue(isinstance(err, MissingRequiredFieldError))
+            self.assertEqual('Input cpus is missing required field: '
+                             '"type".', err.__str__())
+
+        tpl_snippet = '''
+        inputs:
+          cpus:
+            type: integer
+            description: Number of CPUs for the server.
+            constraint:
+              - valid_values: [ 1, 2, 4, 8 ]
+        '''
+        inputs = (translator.toscalib.utils.yamlparser.
+                  simple_parse(tpl_snippet)['inputs'])
+        name, attrs = list(inputs.items())[0]
+        input = Input(name, attrs)
+        try:
+            input.validate()
+        except Exception as err:
+            self.assertTrue(isinstance(err, UnknownFieldError))
+            self.assertEqual('Input cpus contain(s) unknown field: '
+                             '"constraint", refer to the TOSCA specs to '
+                             'verify valid values.', err.__str__())
+
+    def test_outputs(self):
+        tpl_snippet = '''
+        outputs:
+          server_address:
+            description: IP address of server instance.
+            values: { get_property: [server, ip_address] }
+        '''
+        outputs = (translator.toscalib.utils.yamlparser.
+                   simple_parse(tpl_snippet)['outputs'])
+        name, attrs = list(outputs.items())[0]
+        output = Output(name, attrs)
+        try:
+            output.validate()
+        except Exception as err:
+            self.assertTrue(isinstance(err, MissingRequiredFieldError))
+            self.assertEqual('Output server_address is missing required '
+                             'field: "value".', err.__str__())
+
+        tpl_snippet = '''
+        outputs:
+          server_address:
+            descriptions: IP address of server instance.
+            value: { get_property: [server, ip_address] }
+        '''
+        outputs = (translator.toscalib.utils.yamlparser.
+                   simple_parse(tpl_snippet)['outputs'])
+        name, attrs = list(outputs.items())[0]
+        output = Output(name, attrs)
+        try:
+            output.validate()
+        except Exception as err:
+            self.assertTrue(isinstance(err, UnknownFieldError))
+            self.assertEqual('Output server_address contain(s) unknown '
+                             'field: "descriptions", refer to the TOSCA '
+                             'specs to verify valid values.',
+                             err.__str__())
+
+    def _custom_types(self):
+        custom_types = {}
+        def_file = os.path.join(
+            os.path.dirname(os.path.abspath(__file__)),
+            "data/custom_types/wordpress.yaml")
+        custom_type = translator.toscalib.utils.yamlparser.load_yaml(def_file)
+        node_types = custom_type['node_types']
+        for name in node_types:
+            defintion = node_types[name]
+            custom_types[name] = defintion
+        return custom_types
+
+    def _single_node_template_content_test(self, tpl_snippet, expectederror,
+                                           expectedmessage):
+        nodetemplates = (translator.toscalib.utils.yamlparser.
+                         simple_parse(tpl_snippet))['node_templates']
+        name = list(nodetemplates.keys())[0]
+        try:
+            nodetemplate = NodeTemplate(name, nodetemplates,
+                                        self._custom_types())
+            nodetemplate.validate()
+            nodetemplate.requirements
+            nodetemplate.capabilities
+            nodetemplate.properties
+            nodetemplate.interfaces
+        except Exception as err:
+            self.assertTrue(isinstance(err, expectederror))
+            self.assertEqual(expectedmessage, err.__str__())
+
+    def test_node_templates(self):
+        tpl_snippet = '''
+        node_templates:
+          server:
+            properties:
+              # compute properties (flavor)
+              disk_size: 10
+              num_cpus: { get_input: cpus }
+              mem_size: 4096
+              # host image properties
+              os_arch: x86_64
+              os_type: Linux
+              os_distribution: Fedora
+              os_version: 18
+        '''
+        expectedmessage = ('Node template server is missing '
+                           'required field: "type".')
+        self._single_node_template_content_test(tpl_snippet,
+                                                MissingRequiredFieldError,
+                                                expectedmessage)
+
+        tpl_snippet = '''
+        node_templates:
+          mysql_dbms:
+            type: tosca.nodes.DBMS
+            properties:
+              dbms_root_password: { get_input: db_root_pwd }
+              dbms_port: { get_input: db_port }
+            requirement:
+              - host: server
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                create: mysql_dbms_install.sh
+                start: mysql_dbms_start.sh
+                configure:
+                  implementation: mysql_dbms_configure.sh
+                  input:
+                    db_root_password: { get_property: [ mysql_dbms, \
+                    dbms_root_password ] }
+        '''
+        expectedmessage = ('Second level of node template mysql_dbms '
+                           'contain(s) unknown field: "requirement", '
+                           'refer to the TOSCA specs to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)
+
+    def test_node_template_type(self):
+        tpl_snippet = '''
+        node_templates:
+          mysql_database:
+            type: tosca.nodes.Databases
+            properties:
+              db_name: { get_input: db_name }
+              db_user: { get_input: db_user }
+              db_password: { get_input: db_pwd }
+            capabilities:
+              database_endpoint:
+                properties:
+                  port: { get_input: db_port }
+            requirements:
+              - host: mysql_dbms
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                 configure: mysql_database_configure.sh
+        '''
+        expectedmessage = ('Node type "tosca.nodes.Databases" is not '
+                           'a valid type.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                InvalidNodeTypeError,
+                                                expectedmessage)
+
+    def test_node_template_requirements(self):
+        tpl_snippet = '''
+        node_templates:
+          webserver:
+            type: tosca.nodes.WebServer
+            requirements:
+              host: server
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                create: webserver_install.sh
+                start: webserver_start.sh
+        '''
+        expectedmessage = ('Requirements of node template webserver '
+                           'must be of type: "list".')
+        self._single_node_template_content_test(tpl_snippet,
+                                                TypeMismatchError,
+                                                expectedmessage)
+
+        tpl_snippet = '''
+        node_templates:
+          mysql_database:
+            type: tosca.nodes.Database
+            properties:
+              db_name: { get_input: db_name }
+              db_user: { get_input: db_user }
+              db_password: { get_input: db_pwd }
+            capabilities:
+              database_endpoint:
+                properties:
+                  port: { get_input: db_port }
+            requirements:
+              - host: mysql_dbms
+              - database_endpoint: mysql_database
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                 configure: mysql_database_configure.sh
+        '''
+        expectedmessage = ('Requirements of node template mysql_database '
+                           'contain(s) unknown field: "database_endpoint", '
+                           'refer to the TOSCA specs to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)
+
+    def test_node_template_capabilities(self):
+        tpl_snippet = '''
+        node_templates:
+          mysql_database:
+            type: tosca.nodes.Database
+            properties:
+              db_name: { get_input: db_name }
+              db_user: { get_input: db_user }
+              db_password: { get_input: db_pwd }
+            capabilities:
+              http_endpoint:
+                properties:
+                  port: { get_input: db_port }
+            requirements:
+              - host: mysql_dbms
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                 configure: mysql_database_configure.sh
+        '''
+        expectedmessage = ('Capabilities of node template mysql_database '
+                           'contain(s) unknown field: "http_endpoint", '
+                           'refer to the TOSCA specs to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)
+
+    def test_node_template_properties(self):
+        tpl_snippet = '''
+        node_templates:
+          server:
+            type: tosca.nodes.Compute
+            properties:
+              # compute properties (flavor)
+              disk_size: 10
+              num_cpus: { get_input: cpus }
+              mem_size: 4096
+              # host image properties
+              os_arch: x86_64
+              os_distribution: Fedora
+              os_version: 18
+        '''
+        expectedmessage = ('Properties of node template server is missing '
+                           'required field: "[\'os_type\']".')
+        self._single_node_template_content_test(tpl_snippet,
+                                                MissingRequiredFieldError,
+                                                expectedmessage)
+
+        tpl_snippet = '''
+        node_templates:
+          server:
+            type: tosca.nodes.Compute
+            properties:
+              # compute properties (flavor)
+              disk_size: 10
+              num_cpus: { get_input: cpus }
+              mem_size: 4096
+              # host image properties
+              os_arch: x86_64
+              os_type: Linux
+              os_distribution: Fedora
+              os_version: 18
+              os_image: F18_x86_64
+        '''
+        expectedmessage = ('Properties of node template server contain(s) '
+                           'unknown field: "os_image", refer to the TOSCA '
+                           'specs to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)
+
+    def test_node_template_interfaces(self):
+        tpl_snippet = '''
+        node_templates:
+          wordpress:
+            type: tosca.nodes.WebApplication.WordPress
+            requirements:
+              - host: webserver
+              - database_endpoint: mysql_database
+            interfaces:
+              tosca.interfaces.node.Lifecycles:
+                 create: wordpress_install.sh
+                 configure:
+                   implementation: wordpress_configure.sh
+                   input:
+                     wp_db_name: { get_property: [ mysql_database, db_name ] }
+                     wp_db_user: { get_property: [ mysql_database, db_user ] }
+                     wp_db_password: { get_property: [ mysql_database, \
+                     db_password ] }
+                     wp_db_port: { get_ref_property: [ database_endpoint, \
+                     database_endpoint, port ] }
+        '''
+        expectedmessage = ('Interfaces of node template wordpress '
+                           'contain(s) unknown field: '
+                           '"tosca.interfaces.node.Lifecycles", '
+                           'refer to the TOSCA specs to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)
+
+        tpl_snippet = '''
+        node_templates:
+          wordpress:
+            type: tosca.nodes.WebApplication.WordPress
+            requirements:
+              - host: webserver
+              - database_endpoint: mysql_database
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                 create: wordpress_install.sh
+                 config:
+                   implementation: wordpress_configure.sh
+                   input:
+                     wp_db_name: { get_property: [ mysql_database, db_name ] }
+                     wp_db_user: { get_property: [ mysql_database, db_user ] }
+                     wp_db_password: { get_property: [ mysql_database, \
+                     db_password ] }
+                     wp_db_port: { get_ref_property: [ database_endpoint, \
+                     database_endpoint, port ] }
+        '''
+        expectedmessage = ('Interfaces of node template wordpress contain(s) '
+                           'unknown field: "config", refer to the TOSCA specs'
+                           ' to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)
+
+        tpl_snippet = '''
+        node_templates:
+          wordpress:
+            type: tosca.nodes.WebApplication.WordPress
+            requirements:
+              - host: webserver
+              - database_endpoint: mysql_database
+            interfaces:
+              tosca.interfaces.node.Lifecycle:
+                 create: wordpress_install.sh
+                 configure:
+                   implementation: wordpress_configure.sh
+                   inputs:
+                     wp_db_name: { get_property: [ mysql_database, db_name ] }
+                     wp_db_user: { get_property: [ mysql_database, db_user ] }
+                     wp_db_password: { get_property: [ mysql_database, \
+                     db_password ] }
+                     wp_db_port: { get_ref_property: [ database_endpoint, \
+                     database_endpoint, port ] }
+        '''
+        expectedmessage = ('Interfaces of node template wordpress contain(s) '
+                           'unknown field: "inputs", refer to the TOSCA specs'
+                           ' to verify valid values.')
+        self._single_node_template_content_test(tpl_snippet,
+                                                UnknownFieldError,
+                                                expectedmessage)

translator/toscalib/tosca_template.py

@@ -16,13 +16,17 @@
 
 import logging
 import os
+
+from translator.toscalib.common.exception import MissingRequiredFieldError
+from translator.toscalib.common.exception import UnknownFieldError
 from translator.toscalib.nodetemplate import NodeTemplate
 from translator.toscalib.parameters import Input, Output
 from translator.toscalib.tpl_relationship_graph import ToscaGraph
-from translator.toscalib.utils.gettextutils import _
+
 import translator.toscalib.utils.yamlparser
 
 
+#Simple YAML definition A.4.1 Keynames
 SECTIONS = (VERSION, DESCRIPTION, IMPORTS, INPUTS,
             NODE_TEMPLATES, OUTPUTS) = \
            ('tosca_definitions_version', 'description', 'imports', 'inputs',
@@ -38,6 +42,7 @@ class ToscaTemplate(object):
     def __init__(self, path):
         self.tpl = YAML_LOADER(path)
         self.path = path
+        self._validate_field()
         self.version = self._tpl_version()
         self.description = self._tpl_description()
         self.inputs = self._inputs()
@@ -49,9 +54,6 @@ class ToscaTemplate(object):
         inputs = []
         for name, attrs in self._tpl_inputs().items():
             input = Input(name, attrs)
-            if not isinstance(input.schema, dict):
-                raise ValueError(_("The input %(input)s has no attributes.")
-                                 % {'input': input})
             input.validate()
             inputs.append(input)
         return inputs
@@ -73,7 +75,7 @@ class ToscaTemplate(object):
                     custom_types[name] = defintion
         nodetemplates = []
         tpls = self._tpl_nodetemplates()
-        for name, value in tpls.items():
+        for name in tpls:
             tpl = NodeTemplate(name, tpls, custom_types)
             tpl.validate()
             nodetemplates.append(tpl)
@@ -82,7 +84,9 @@ class ToscaTemplate(object):
     def _outputs(self):
         outputs = []
         for name, attrs in self._tpl_outputs().items():
-            outputs.append(Output(name, attrs))
+            output = Output(name, attrs)
+            output.validate()
+            outputs.append(output)
         return outputs
 
     def _tpl_version(self):
@@ -103,3 +107,12 @@ class ToscaTemplate(object):
 
     def _tpl_outputs(self):
         return self.tpl[OUTPUTS]
+
+    def _validate_field(self):
+        try:
+            self._tpl_version()
+        except KeyError:
+            raise MissingRequiredFieldError(what='Template', required=VERSION)
+        for name in self.tpl:
+            if name not in SECTIONS:
+                raise UnknownFieldError(what='Template', field=name)

translator/toscalib/utils/yamlparser.py

@@ -24,3 +24,14 @@ else:
 def load_yaml(path):
     with open(path) as f:
         return yaml.load(f.read(), Loader=yaml_loader)
+
+
+def simple_parse(tmpl_str):
+    try:
+        tpl = yaml.load(tmpl_str, Loader=yaml_loader)
+    except yaml.YAMLError as yea:
+        raise ValueError(yea)
+    else:
+        if tpl is None:
+            tpl = {}
+    return tpl