Add sample spec to catch external file reference issues in swagger-parser (#17773)

* add a sample that catches swagger-parser issues with external refs

* generate samples for new test spec

samples/client/echo_api/go-external-refs/model_data_query.go

@@ -0,0 +1,212 @@
+/*
+Echo Server API
+
+Echo Server API
+
+API version: 0.1.0
+Contact: team@openapitools.org
+*/
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package openapi
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// checks if the DataQuery type satisfies the MappedNullable interface at compile time
+var _ MappedNullable = &DataQuery{}
+
+// DataQuery struct for DataQuery
+type DataQuery struct {
+	Query
+	// test suffix
+	Suffix *string `json:"suffix,omitempty"`
+	// Some text containing white spaces
+	Text *string `json:"text,omitempty"`
+	// A date
+	Date *time.Time `json:"date,omitempty"`
+}
+
+// NewDataQuery instantiates a new DataQuery object
+// This constructor will assign default values to properties that have it defined,
+// and makes sure properties required by API are set, but the set of arguments
+// will change when the set of required properties is changed
+func NewDataQuery() *DataQuery {
+	this := DataQuery{}
+	return &this
+}
+
+// NewDataQueryWithDefaults instantiates a new DataQuery object
+// This constructor will only assign default values to properties that have it defined,
+// but it doesn't guarantee that properties required by API are set
+func NewDataQueryWithDefaults() *DataQuery {
+	this := DataQuery{}
+	return &this
+}
+
+// GetSuffix returns the Suffix field value if set, zero value otherwise.
+func (o *DataQuery) GetSuffix() string {
+	if o == nil || IsNil(o.Suffix) {
+		var ret string
+		return ret
+	}
+	return *o.Suffix
+}
+
+// GetSuffixOk returns a tuple with the Suffix field value if set, nil otherwise
+// and a boolean to check if the value has been set.
+func (o *DataQuery) GetSuffixOk() (*string, bool) {
+	if o == nil || IsNil(o.Suffix) {
+		return nil, false
+	}
+	return o.Suffix, true
+}
+
+// HasSuffix returns a boolean if a field has been set.
+func (o *DataQuery) HasSuffix() bool {
+	if o != nil && !IsNil(o.Suffix) {
+		return true
+	}
+
+	return false
+}
+
+// SetSuffix gets a reference to the given string and assigns it to the Suffix field.
+func (o *DataQuery) SetSuffix(v string) {
+	o.Suffix = &v
+}
+
+// GetText returns the Text field value if set, zero value otherwise.
+func (o *DataQuery) GetText() string {
+	if o == nil || IsNil(o.Text) {
+		var ret string
+		return ret
+	}
+	return *o.Text
+}
+
+// GetTextOk returns a tuple with the Text field value if set, nil otherwise
+// and a boolean to check if the value has been set.
+func (o *DataQuery) GetTextOk() (*string, bool) {
+	if o == nil || IsNil(o.Text) {
+		return nil, false
+	}
+	return o.Text, true
+}
+
+// HasText returns a boolean if a field has been set.
+func (o *DataQuery) HasText() bool {
+	if o != nil && !IsNil(o.Text) {
+		return true
+	}
+
+	return false
+}
+
+// SetText gets a reference to the given string and assigns it to the Text field.
+func (o *DataQuery) SetText(v string) {
+	o.Text = &v
+}
+
+// GetDate returns the Date field value if set, zero value otherwise.
+func (o *DataQuery) GetDate() time.Time {
+	if o == nil || IsNil(o.Date) {
+		var ret time.Time
+		return ret
+	}
+	return *o.Date
+}
+
+// GetDateOk returns a tuple with the Date field value if set, nil otherwise
+// and a boolean to check if the value has been set.
+func (o *DataQuery) GetDateOk() (*time.Time, bool) {
+	if o == nil || IsNil(o.Date) {
+		return nil, false
+	}
+	return o.Date, true
+}
+
+// HasDate returns a boolean if a field has been set.
+func (o *DataQuery) HasDate() bool {
+	if o != nil && !IsNil(o.Date) {
+		return true
+	}
+
+	return false
+}
+
+// SetDate gets a reference to the given time.Time and assigns it to the Date field.
+func (o *DataQuery) SetDate(v time.Time) {
+	o.Date = &v
+}
+
+func (o DataQuery) MarshalJSON() ([]byte, error) {
+	toSerialize,err := o.ToMap()
+	if err != nil {
+		return []byte{}, err
+	}
+	return json.Marshal(toSerialize)
+}
+
+func (o DataQuery) ToMap() (map[string]interface{}, error) {
+	toSerialize := map[string]interface{}{}
+	serializedQuery, errQuery := json.Marshal(o.Query)
+	if errQuery != nil {
+		return map[string]interface{}{}, errQuery
+	}
+	errQuery = json.Unmarshal([]byte(serializedQuery), &toSerialize)
+	if errQuery != nil {
+		return map[string]interface{}{}, errQuery
+	}
+	if !IsNil(o.Suffix) {
+		toSerialize["suffix"] = o.Suffix
+	}
+	if !IsNil(o.Text) {
+		toSerialize["text"] = o.Text
+	}
+	if !IsNil(o.Date) {
+		toSerialize["date"] = o.Date
+	}
+	return toSerialize, nil
+}
+
+type NullableDataQuery struct {
+	value *DataQuery
+	isSet bool
+}
+
+func (v NullableDataQuery) Get() *DataQuery {
+	return v.value
+}
+
+func (v *NullableDataQuery) Set(val *DataQuery) {
+	v.value = val
+	v.isSet = true
+}
+
+func (v NullableDataQuery) IsSet() bool {
+	return v.isSet
+}
+
+func (v *NullableDataQuery) Unset() {
+	v.value = nil
+	v.isSet = false
+}
+
+func NewNullableDataQuery(val *DataQuery) *NullableDataQuery {
+	return &NullableDataQuery{value: val, isSet: true}
+}
+
+func (v NullableDataQuery) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.value)
+}
+
+func (v *NullableDataQuery) UnmarshalJSON(src []byte) error {
+	v.isSet = true
+	return json.Unmarshal(src, &v.value)
+}
+
+