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diff --git a/lib/open_api_spex/cast/error.ex b/lib/open_api_spex/cast/error.ex
index 4c00261..0604070 100644
--- a/lib/open_api_spex/cast/error.ex
+++ b/lib/open_api_spex/cast/error.ex
@@ -1,142 +1,147 @@
defmodule OpenApiSpex.Cast.Error do
alias OpenApiSpex.TermType
defstruct reason: nil,
value: nil,
format: nil,
type: nil,
name: nil,
path: [],
length: 0,
meta: %{}
def new(ctx, {:invalid_schema_type}) do
%__MODULE__{reason: :invalid_schema_type, type: ctx.schema.type}
|> add_context_fields(ctx)
end
def new(ctx, {:null_value}) do
type = ctx.schema && ctx.schema.type
%__MODULE__{reason: :null_value, type: type}
|> add_context_fields(ctx)
end
def new(ctx, {:min_length, length}) do
%__MODULE__{reason: :min_length, length: length}
|> add_context_fields(ctx)
end
def new(ctx, {:invalid_type, type}) do
%__MODULE__{reason: :invalid_type, type: type}
|> add_context_fields(ctx)
end
def new(ctx, {:invalid_format, format}) do
%__MODULE__{reason: :invalid_format, format: format}
|> add_context_fields(ctx)
end
def new(ctx, {:invalid_enum}) do
%__MODULE__{reason: :invalid_enum}
|> add_context_fields(ctx)
end
def new(ctx, {:unexpected_field, name}) do
%__MODULE__{reason: :unexpected_field, name: name}
|> add_context_fields(ctx)
end
def new(ctx, {:missing_field, name}) do
%__MODULE__{reason: :missing_field, name: name}
|> add_context_fields(ctx)
end
- def new(ctx, {:max_properties, max_properties}) do
- %__MODULE__{reason: :max_properties, meta: %{max_properties: max_properties}}
+ def new(ctx, {:max_properties, max_properties, property_count}) do
+ %__MODULE__{
+ reason: :max_properties,
+ meta: %{max_properties: max_properties, property_count: property_count}
+ }
|> add_context_fields(ctx)
end
def message(%{reason: :invalid_schema_type, type: type}) do
"Invalid schema.type. Got: #{inspect(type)}"
end
def message(%{reason: :null_value} = error) do
case error.type do
nil -> "null value"
type -> "null value where #{type} expected"
end
end
def message(%{reason: :min_length, length: length}) do
"String length is smaller than minLength: #{length}"
end
def message(%{reason: :invalid_type, type: type, value: value}) do
"Invalid #{type}. Got: #{TermType.type(value)}"
end
def message(%{reason: :invalid_format, format: format}) do
"Invalid format. Expected #{inspect(format)}"
end
def message(%{reason: :invalid_enum}) do
"Invalid value for enum"
end
def message(%{reason: :polymorphic_failed, type: polymorphic_type}) do
"Failed to cast to any schema in #{polymorphic_type}"
end
def message(%{reason: :unexpected_field, name: name}) do
"Unexpected field: #{safe_string(name)}"
end
def message(%{reason: :no_value_required_for_discriminator, name: field}) do
"No value for required disciminator property: #{field}"
end
def message(%{reason: :unknown_schema, name: name}) do
"Unknown schema: #{name}"
end
def message(%{reason: :missing_field, name: name}) do
"Missing field: #{name}"
end
def message(%{reason: :max_properties, meta: meta}) do
- "More object properties than allowed by maxProperties, #{meta.max_properties}"
+ "Object property count #{meta.property_count} is greater than maxProperties: #{
+ meta.max_properties
+ }"
end
def message_with_path(error) do
prepend_path(error, message(error))
end
def path_to_string(%{path: path} = _error) do
"/" <> (path |> Enum.map(&to_string/1) |> Path.join())
end
defp add_context_fields(error, ctx) do
%{error | path: Enum.reverse(ctx.path), value: ctx.value}
end
defp prepend_path(error, message) do
path =
case error.path do
[] -> "#"
_ -> "#" <> path_to_string(error)
end
path <> ": " <> message
end
defp safe_string(string) do
to_string(string) |> String.slice(0..39)
end
end
defimpl String.Chars, for: OpenApiSpex.Cast.Error do
def to_string(error) do
OpenApiSpex.Cast.Error.message(error)
end
end
diff --git a/lib/open_api_spex/cast/object.ex b/lib/open_api_spex/cast/object.ex
index cb5798e..0bbafdf 100644
--- a/lib/open_api_spex/cast/object.ex
+++ b/lib/open_api_spex/cast/object.ex
@@ -1,108 +1,108 @@
defmodule OpenApiSpex.Cast.Object do
@moduledoc false
alias OpenApiSpex.Cast
alias OpenApiSpex.Cast.Error
def cast(%{value: value} = ctx) when not is_map(value) do
Cast.error(ctx, {:invalid_type, :object})
end
def cast(%{value: value, schema: %{properties: nil}}) do
{:ok, value}
end
def cast(%{value: value, schema: schema} = ctx) do
schema_properties = schema.properties || %{}
with :ok <- check_unrecognized_properties(ctx, schema_properties),
value = cast_atom_keys(value, schema_properties),
ctx = %{ctx | value: value},
:ok <- check_required_fields(ctx, schema),
:ok <- check_max_properties(ctx),
{:ok, value} <- cast_properties(%{ctx | schema: schema_properties}) do
ctx = to_struct(%{ctx | value: value})
{:ok, ctx}
end
end
defp check_unrecognized_properties(%{value: value} = ctx, expected_keys) do
input_keys = value |> Map.keys() |> Enum.map(&to_string/1)
schema_keys = expected_keys |> Map.keys() |> Enum.map(&to_string/1)
extra_keys = input_keys -- schema_keys
if extra_keys == [] do
:ok
else
[name | _] = extra_keys
Cast.error(ctx, {:unexpected_field, name})
end
end
defp check_required_fields(%{value: input_map} = ctx, schema) do
required = schema.required || []
input_keys = Map.keys(input_map)
missing_keys = required -- input_keys
if missing_keys == [] do
:ok
else
errors =
Enum.map(missing_keys, fn key ->
ctx = %{ctx | path: [key | ctx.path]}
Error.new(ctx, {:missing_field, key})
end)
{:error, ctx.errors ++ errors}
end
end
defp check_max_properties(%{schema: %{maxProperties: max_properties}} = ctx)
when is_integer(max_properties) do
count = ctx.value |> Map.keys() |> length()
if count > max_properties do
- Cast.error(ctx, {:max_properties, max_properties})
+ Cast.error(ctx, {:max_properties, max_properties, count})
else
:ok
end
end
defp check_max_properties(_ctx), do: :ok
defp cast_atom_keys(input_map, properties) do
Enum.reduce(properties, %{}, fn {key, _}, output ->
string_key = to_string(key)
case input_map do
%{^key => value} -> Map.put(output, key, value)
%{^string_key => value} -> Map.put(output, key, value)
_ -> output
end
end)
end
defp cast_properties(%{value: object, schema: schema_properties} = ctx) do
Enum.reduce(object, {:ok, %{}}, fn
{key, value}, {:ok, output} ->
cast_property(%{ctx | key: key, value: value, schema: schema_properties}, output)
_, error ->
error
end)
end
defp cast_property(%{key: key, schema: schema_properties} = ctx, output) do
prop_schema = Map.get(schema_properties, key)
path = [key | ctx.path]
with {:ok, value} <- Cast.cast(%{ctx | path: path, schema: prop_schema}) do
{:ok, Map.put(output, key, value)}
end
end
defp to_struct(%{value: value = %_{}}), do: value
defp to_struct(%{value: value, schema: %{"x-struct": nil}}), do: value
defp to_struct(%{value: value, schema: %{"x-struct": module}}),
do: struct(module, value)
end
diff --git a/lib/open_api_spex/test/assertions2.ex b/lib/open_api_spex/test/assertions2.ex
new file mode 100644
index 0000000..225afcf
--- /dev/null
+++ b/lib/open_api_spex/test/assertions2.ex
@@ -0,0 +1,37 @@
+defmodule OpenApiSpex.Test.Assertions2 do
+ @moduledoc """
+ Defines helpers for testing API responses and examples against API spec schemas.
+ """
+ alias OpenApiSpex.OpenApi
+ alias OpenApiSpex.Cast
+ import ExUnit.Assertions
+
+ @dialyzer {:no_match, assert_schema: 3}
+
+ @doc """
+ Asserts that `value` conforms to the schema with title `schema_title` in `api_spec`.
+ """
+ @spec assert_schema(map, String.t(), OpenApi.t()) :: map | no_return
+ def assert_schema(value = %{}, schema_title, api_spec = %OpenApi{}) do
+ schemas = api_spec.components.schemas
+ schema = schemas[schema_title]
+
+ if !schema do
+ flunk("Schema: #{schema_title} not found in #{inspect(Map.keys(schemas))}")
+ end
+
+ case Cast.cast(schema, value, api_spec.components.schemas) do
+ {:ok, data} ->
+ data
+
+ {:error, errors} ->
+ errors = Enum.map(errors, &to_string/1)
+
+ flunk(
+ "Value does not conform to schema #{schema_title}: #{Enum.join(errors, "\n")}\n#{
+ inspect(value)
+ }"
+ )
+ end
+ end
+end

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