errors_test.go

// Copyright (c) Codesphere Inc.
// SPDX-License-Identifier: Apache-2.0

package errors_test

import (
	"fmt"
	"net/http"
	"net/url"
	"reflect"
	"unsafe"

	. "github.com/onsi/ginkgo/v2"
	. "github.com/onsi/gomega"

	"github.com/codesphere-cloud/cs-go/api/errors"
	"github.com/codesphere-cloud/cs-go/api/openapi_client"
)

func makeGenericOpenAPIError(body []byte, errStr string) error {
	typ := reflect.TypeOf(openapi_client.GenericOpenAPIError{})
	val := reflect.New(typ).Elem()

	bodyField := val.FieldByName("body")
	errField := val.FieldByName("error")

	reflect.NewAt(bodyField.Type(), unsafe.Pointer(bodyField.UnsafeAddr())).Elem().Set(reflect.ValueOf(body))
	reflect.NewAt(errField.Type(), unsafe.Pointer(errField.UnsafeAddr())).Elem().Set(reflect.ValueOf(errStr))

	return val.Addr().Interface().(error)
}

var _ = Describe("FormatAPIError", func() {
	var (
		r *http.Response
	)

	BeforeEach(func() {
		r = &http.Response{
			StatusCode: 123,
			Request:    &http.Request{URL: &url.URL{Scheme: "http", Host: "codesphere.com", Path: "/api/fake"}},
		}
	})
	It("returns nil for nil error", func() {
		Expect(errors.FormatAPIError(nil, nil)).To(BeNil())
	})

	It("returns regular error unchanged", func() {
		err := fmt.Errorf("regular error")
		res := errors.FormatAPIError(r, err)
		Expect(res).ToNot(BeNil())
		Expect(res.Error()).To(Equal(fmt.Sprintf("unexpected error %d at URL %s: %s", r.StatusCode, r.Request.URL.String(), err.Error())))
	})

	It("parses API JSON error and formats it", func() {
		apiErr := makeGenericOpenAPIError([]byte(`{"status":400,"title":"Workspace is not running","detail":"Workspace '796636' is not in a running state.","traceId":"svJDMa5"}`), "400 Bad Request")
		res := errors.FormatAPIError(r, apiErr)
		Expect(res).ToNot(BeNil())
		Expect(res.Error()).To(Equal("API error 400 Workspace is not running: Workspace '796636' is not in a running state."))
	})
})