Adding upstream version 1.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

errorhandler_test.go

@@ -0,0 +1,161 @@
+// Copyright 2014 Martini Authors
+// Copyright 2014 The Macaron Authors
+//
+// 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"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+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: jsonContentType,
+			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: jsonContentType,
+			body:        `[{"classification":"ContentTypeError","message":"Empty Content-Type"}]`,
+		},
+	},
+	{
+		description: "Requirement error",
+		errors: Errors{
+			{
+				FieldNames:     []string{"some_field"},
+				Classification: ERR_REQUIRED,
+				Message:        "Required",
+			},
+		},
+		expected: errorTestResult{
+			statusCode:  http.StatusUnprocessableEntity,
+			contentType: jsonContentType,
+			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:  http.StatusUnprocessableEntity,
+			contentType: jsonContentType,
+			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:  http.StatusUnprocessableEntity,
+			contentType: jsonContentType,
+			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:  http.StatusUnprocessableEntity,
+			contentType: jsonContentType,
+			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) {
+	for _, testCase := range errorTestCases {
+		performErrorTest(t, testCase)
+	}
+}
+
+func performErrorTest(t *testing.T, testCase errorTestCase) {
+	resp := httptest.NewRecorder()
+
+	errorHandler(testCase.errors, resp)
+
+	assert.EqualValues(t, testCase.expected.statusCode, resp.Code)
+	assert.EqualValues(t, testCase.expected.contentType, resp.Header().Get("Content-Type"))
+
+	actualBody, err := io.ReadAll(resp.Body)
+	require.NoError(t, err)
+	assert.EqualValues(t, testCase.expected.body, string(actualBody))
+}
+
+type (
+	errorTestCase struct {
+		description string
+		errors      Errors
+		expected    errorTestResult
+	}
+
+	errorTestResult struct {
+		statusCode  int
+		contentType string
+		body        string
+	}
+)