adding some model generation tests (#38)

Adding some model generation tests corresponding to openapi-generator changes done in OpenAPITools/openapi-generator#16030

Author: tanmaykm

test/modelgen/ModelGenClient/.openapi-generator-ignore

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+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

test/modelgen/ModelGenClient/.openapi-generator/FILES

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+README.md
+docs/DefaultApi.md
+docs/TestModel.md
+src/ModelGenClient.jl
+src/apis/api_DefaultApi.jl
+src/modelincludes.jl
+src/models/model_TestModel.jl

test/modelgen/ModelGenClient/.openapi-generator/VERSION

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+7.0.0-SNAPSHOT

test/modelgen/ModelGenClient/README.md

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+# Julia API client for ModelGenClient
+
+Model Generation Tests
+
+## Overview
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.  By using the [openapi-spec](https://openapis.org) from a remote server, you can easily generate an API client.
+
+- API version: 0.1.0
+- Build package: org.openapitools.codegen.languages.JuliaClientCodegen
+
+
+## Installation
+Place the Julia files generated under the `src` folder in your Julia project. Include ModelGenClient.jl in the project code.
+It would include the module named ModelGenClient.
+
+Documentation is generated as markdown files under the `docs` folder. You can include them in your project documentation.
+Documentation is also embedded in Julia which can be used with a Julia specific documentation generator.
+
+## API Endpoints
+
+Class | Method
+------------ | -------------
+*DefaultApi* | [**test**](docs/DefaultApi.md#test)<br/>**GET** /test<br/>Test
+
+
+## Models
+
+ - [TestModel](docs/TestModel.md)
+
+
+<a id="authorization"></a>
+## Authorization
+Endpoints do not require authorization.
+
+
+## Author
+
+
+

test/modelgen/ModelGenClient/docs/DefaultApi.md

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+# DefaultApi
+
+All URIs are relative to *http://localhost*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**test**](DefaultApi.md#test) | **GET** /test | Test
+
+
+# **test**
+> test(_api::DefaultApi; _mediaType=nothing) -> TestModel, OpenAPI.Clients.ApiResponse <br/>
+> test(_api::DefaultApi, response_stream::Channel; _mediaType=nothing) -> Channel{ TestModel }, OpenAPI.Clients.ApiResponse
+
+Test
+
+### Required Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+[**TestModel**](TestModel.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#api-endpoints) [[Back to Model list]](../README.md#models) [[Back to README]](../README.md)
+

test/modelgen/ModelGenClient/docs/TestModel.md

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+# TestModel
+
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**limited_by** | **String** |  | [optional] [default to "time"]
+**default_date** | **Date** |  | [optional] [default to OpenAPI.str2date("2011-11-11")]
+**default_datetime** | **ZonedDateTime** |  | [optional] [default to OpenAPI.str2zoneddatetime("2011-11-11T11:11:11Z")]
+**max_val** | **Int64** |  | [optional] [default to 100]
+
+
+[[Back to Model list]](../README.md#models) [[Back to API list]](../README.md#api-endpoints) [[Back to README]](../README.md)
+
+

test/modelgen/ModelGenClient/src/ModelGenClient.jl

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+# This file was generated by the Julia OpenAPI Code Generator
+# Do not modify this file directly. Modify the OpenAPI specification instead.
+
+module ModelGenClient
+
+using Dates, TimeZones
+using OpenAPI
+using OpenAPI.Clients
+
+const API_VERSION = "0.1.0"
+
+include("modelincludes.jl")
+
+include("apis/api_DefaultApi.jl")
+
+end # module ModelGenClient

test/modelgen/ModelGenClient/src/apis/api_DefaultApi.jl

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+# This file was generated by the Julia OpenAPI Code Generator
+# Do not modify this file directly. Modify the OpenAPI specification instead.
+
+struct DefaultApi <: OpenAPI.APIClientImpl
+    client::OpenAPI.Clients.Client
+end
+
+"""
+The default API base path for APIs in `DefaultApi`.
+This can be used to construct the `OpenAPI.Clients.Client` instance.
+"""
+basepath(::Type{ DefaultApi }) = "http://localhost"
+
+const _returntypes_test_DefaultApi = Dict{Regex,Type}(
+    Regex("^" * replace("200", "x"=>".") * "\$") => TestModel,
+)
+
+function _oacinternal_test(_api::DefaultApi; _mediaType=nothing)
+    _ctx = OpenAPI.Clients.Ctx(_api.client, "GET", _returntypes_test_DefaultApi, "/test", [])
+    OpenAPI.Clients.set_header_accept(_ctx, ["application/json", ])
+    OpenAPI.Clients.set_header_content_type(_ctx, (_mediaType === nothing) ? [] : [_mediaType])
+    return _ctx
+end
+
+@doc raw"""Test
+
+Params:
+
+Return: TestModel, OpenAPI.Clients.ApiResponse
+"""
+function test(_api::DefaultApi; _mediaType=nothing)
+    _ctx = _oacinternal_test(_api; _mediaType=_mediaType)
+    return OpenAPI.Clients.exec(_ctx)
+end
+
+function test(_api::DefaultApi, response_stream::Channel; _mediaType=nothing)
+    _ctx = _oacinternal_test(_api; _mediaType=_mediaType)
+    return OpenAPI.Clients.exec(_ctx, response_stream)
+end
+
+export test

test/modelgen/ModelGenClient/src/modelincludes.jl

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+# This file was generated by the Julia OpenAPI Code Generator
+# Do not modify this file directly. Modify the OpenAPI specification instead.
+
+include("models/model_TestModel.jl")

test/modelgen/ModelGenClient/src/models/model_TestModel.jl

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+# This file was generated by the Julia OpenAPI Code Generator
+# Do not modify this file directly. Modify the OpenAPI specification instead.
+
+
+@doc raw"""TestModel
+
+    TestModel(;
+        limited_by="time",
+        default_date=OpenAPI.str2date("2011-11-11"),
+        default_datetime=OpenAPI.str2zoneddatetime("2011-11-11T11:11:11Z"),
+        max_val=100,
+    )
+
+    - limited_by::String
+    - default_date::Date
+    - default_datetime::ZonedDateTime
+    - max_val::Int64
+"""
+Base.@kwdef mutable struct TestModel <: OpenAPI.APIModel
+    limited_by::Union{Nothing, String} = "time"
+    default_date::Union{Nothing, Date} = OpenAPI.str2date("2011-11-11")
+    default_datetime::Union{Nothing, ZonedDateTime} = OpenAPI.str2zoneddatetime("2011-11-11T11:11:11Z")
+    max_val::Union{Nothing, Int64} = 100
+
+    function TestModel(limited_by, default_date, default_datetime, max_val, )
+        OpenAPI.validate_property(TestModel, Symbol("limited_by"), limited_by)
+        OpenAPI.validate_property(TestModel, Symbol("default_date"), default_date)
+        OpenAPI.validate_property(TestModel, Symbol("default_datetime"), default_datetime)
+        OpenAPI.validate_property(TestModel, Symbol("max_val"), max_val)
+        return new(limited_by, default_date, default_datetime, max_val, )
+    end
+end # type TestModel
+
+const _property_types_TestModel = Dict{Symbol,String}(Symbol("limited_by")=>"String", Symbol("default_date")=>"Date", Symbol("default_datetime")=>"ZonedDateTime", Symbol("max_val")=>"Int64", )
+OpenAPI.property_type(::Type{ TestModel }, name::Symbol) = Union{Nothing,eval(Base.Meta.parse(_property_types_TestModel[name]))}
+
+function check_required(o::TestModel)
+    true
+end
+
+function OpenAPI.validate_property(::Type{ TestModel }, name::Symbol, val)
+    if name === Symbol("limited_by")
+        OpenAPI.validate_param(name, "TestModel", :enum, val, ["time", "cost", "unlimited"])
+    end
+    if name === Symbol("default_date")
+        OpenAPI.validate_param(name, "TestModel", :format, val, "date")
+    end
+    if name === Symbol("default_datetime")
+        OpenAPI.validate_param(name, "TestModel", :format, val, "date-time")
+    end
+    if name === Symbol("max_val")
+        OpenAPI.validate_param(name, "TestModel", :enum, val, [100, 200, 300])
+    end
+end