Binding middleware for tango
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// Copyright 2014 martini-contrib/binding Authors
// Copyright 2014 Unknwon
//
// 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.
package binding
import (
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
. "github.com/smartystreets/goconvey/convey"
)
var errorTestCases = []errorTestCase{
{
description: "No errors",
errors: Errors{},
expected: errorTestResult{
statusCode: http.StatusOK,
},
},
{
description: "Deserialization error",
errors: Errors{
{
Classification: ERR_DESERIALIZATION,
Message: "Some parser error here",
},
},
expected: errorTestResult{
statusCode: http.StatusBadRequest,
contentType: _JSON_CONTENT_TYPE,
body: `[{"classification":"DeserializationError","message":"Some parser error here"}]`,
},
},
{
description: "Content-Type error",
errors: Errors{
{
Classification: ERR_CONTENT_TYPE,
Message: "Empty Content-Type",
},
},
expected: errorTestResult{
statusCode: http.StatusUnsupportedMediaType,
contentType: _JSON_CONTENT_TYPE,
body: `[{"classification":"ContentTypeError","message":"Empty Content-Type"}]`,
},
},
{
description: "Requirement error",
errors: Errors{
{
FieldNames: []string{"some_field"},
Classification: ERR_REQUIRED,
Message: "Required",
},
},
expected: errorTestResult{
statusCode: STATUS_UNPROCESSABLE_ENTITY,
contentType: _JSON_CONTENT_TYPE,
body: `[{"fieldNames":["some_field"],"classification":"RequiredError","message":"Required"}]`,
},
},
{
description: "Bad header error",
errors: Errors{
{
Classification: "HeaderError",
Message: "The X-Something header must be specified",
},
},
expected: errorTestResult{
statusCode: STATUS_UNPROCESSABLE_ENTITY,
contentType: _JSON_CONTENT_TYPE,
body: `[{"classification":"HeaderError","message":"The X-Something header must be specified"}]`,
},
},
{
description: "Custom field error",
errors: Errors{
{
FieldNames: []string{"month", "year"},
Classification: "DateError",
Message: "The month and year must be in the future",
},
},
expected: errorTestResult{
statusCode: STATUS_UNPROCESSABLE_ENTITY,
contentType: _JSON_CONTENT_TYPE,
body: `[{"fieldNames":["month","year"],"classification":"DateError","message":"The month and year must be in the future"}]`,
},
},
{
description: "Multiple errors",
errors: Errors{
{
FieldNames: []string{"foo"},
Classification: ERR_REQUIRED,
Message: "Required",
},
{
FieldNames: []string{"foo"},
Classification: "LengthError",
Message: "The length of the 'foo' field is too short",
},
},
expected: errorTestResult{
statusCode: STATUS_UNPROCESSABLE_ENTITY,
contentType: _JSON_CONTENT_TYPE,
body: `[{"fieldNames":["foo"],"classification":"RequiredError","message":"Required"},{"fieldNames":["foo"],"classification":"LengthError","message":"The length of the 'foo' field is too short"}]`,
},
},
}
func Test_ErrorHandler(t *testing.T) {
Convey("Error handler", t, func() {
for _, testCase := range errorTestCases {
performErrorTest(t, testCase)
}
})
}
func performErrorTest(t *testing.T, testCase errorTestCase) {
resp := httptest.NewRecorder()
errorHandler(testCase.errors, resp)
So(resp.Code, ShouldEqual, testCase.expected.statusCode)
So(resp.Header().Get("Content-Type"), ShouldEqual, testCase.expected.contentType)
actualBody, err := ioutil.ReadAll(resp.Body)
So(err, ShouldBeNil)
So(string(actualBody), ShouldEqual, testCase.expected.body)
}
type (
errorTestCase struct {
description string
errors Errors
expected errorTestResult
}
errorTestResult struct {
statusCode int
contentType string
body string
}
)