Julian/jsonschema#782: Add dependentRequired and dependentSchemas validation

2 files changed, 40 insertions, 1 deletions

diff --git a/jsonschema/_validators.py b/jsonschema/_validators.py
index 0f7b6fb..0e973f3 100644
--- a/jsonschema/_validators.py
+++ b/jsonschema/_validators.py
@@ -234,6 +234,10 @@ def maxLength(validator, mL, instance, schema):
 
 
 def dependencies(validator, dependencies, instance, schema):
+    """
+    The dependencies keyword has been deprecated since draft 2019-09 and has been split into dependentRequired
+    and dependentSchemas.
+    """
     if not validator.is_type(instance, "object"):
         return
 
@@ -253,6 +257,40 @@ def dependencies(validator, dependencies, instance, schema):
                 yield error
 
 
+def dependentRequired(validator, dependentRequired, instance, schema):
+    """
+    Split from dependencies
+    """
+    if not validator.is_type(instance, "object"):
+        return
+
+    for property, dependency in dependentRequired.items():
+        if property not in instance:
+            continue
+
+        for each in dependency:
+            if each not in instance:
+                message = "%r is a dependency of %r"
+                yield ValidationError(message % (each, property))
+
+
+def dependentSchemas(validator, dependentSchemas, instance, schema):
+    """
+    Split from dependencies
+    """
+    if not validator.is_type(instance, "object"):
+        return
+
+    for property, dependency in dependentSchemas.items():
+        if property not in instance:
+            continue
+
+        for error in validator.descend(
+                instance, dependency, schema_path=property,
+        ):
+            yield error
+
+
 def enum(validator, enums, instance, schema):
     if instance == 0 or instance == 1:
         unbooled = unbool(instance)
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index c1b0753..8c0edd4 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -438,7 +438,8 @@ Draft202012Validator = create(
         u"anyOf": _validators.anyOf,
         u"const": _validators.const,
         u"contains": _validators.contains,
-        u"dependencies": _validators.dependencies,
+        u"dependentRequired": _validators.dependentRequired,
+        u"dependentSchemas": _validators.dependentSchemas,
         u"enum": _validators.enum,
         u"exclusiveMaximum": _validators.exclusiveMaximum,
         u"exclusiveMinimum": _validators.exclusiveMinimum,