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fake_github.go
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/
fake_github.go
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/*
* Copyright 2021 Skyscanner Limited.
*
* 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
* https://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 github
import (
"errors"
"io"
"testing"
"github.com/stretchr/testify/assert"
)
type FakeGitHub struct {
handler func(command Command, args []string) (bool, error)
returningHandler func(workingDir string) (interface{}, error)
calls [][]string
}
func (f *FakeGitHub) CreatePullRequest(_ io.Writer, workingDir string, metadata PullRequest) (didCreate bool, err error) {
args := []string{workingDir, metadata.Title}
f.calls = append(f.calls, args)
return f.handler(CreatePullRequest, args)
}
func (f *FakeGitHub) ForkAndClone(_ io.Writer, workingDir string, fullRepoName string) error {
args := []string{workingDir, fullRepoName}
f.calls = append(f.calls, args)
_, err := f.handler(ForkAndClone, args)
return err
}
func (f *FakeGitHub) Clone(_ io.Writer, workingDir string, fullRepoName string) error {
args := []string{workingDir, fullRepoName}
f.calls = append(f.calls, args)
_, err := f.handler(Clone, args)
return err
}
func (f *FakeGitHub) ClosePullRequest(_ io.Writer, workingDir string, branchName string) error {
args := []string{workingDir, branchName}
f.calls = append(f.calls, args)
_, err := f.handler(ClosePullRequest, args)
return err
}
func (f *FakeGitHub) GetPR(_ io.Writer, workingDir string, _ string) (*PrStatus, error) {
f.calls = append(f.calls, []string{workingDir})
result, err := f.returningHandler(workingDir)
if result == nil {
return nil, err
}
return result.(*PrStatus), err
}
func (f *FakeGitHub) GetDefaultBranchName(_ io.Writer, workingDir string, fullRepoName string) (string, error) {
args := []string{workingDir, fullRepoName}
f.calls = append(f.calls, args)
_, err := f.handler(GetDefaultBranchName, args)
return "main", err
}
func (f *FakeGitHub) UpdatePRDescription(_ io.Writer, workingDir string, title string, body string) error {
args := []string{workingDir, title, body}
f.calls = append(f.calls, args)
_, err := f.handler(UpdatePRDescription, args)
return err
}
func (f *FakeGitHub) AssertCalledWith(t *testing.T, expected [][]string) {
assert.Equal(t, expected, f.calls)
}
func NewFakeGitHub(h func(command Command, args []string) (bool, error), r func(workingDir string) (interface{}, error)) *FakeGitHub {
return &FakeGitHub{
handler: h,
returningHandler: r,
calls: [][]string{},
}
}
func NewAlwaysSucceedsFakeGitHub() *FakeGitHub {
return NewFakeGitHub(func(command Command, args []string) (bool, error) {
return true, nil
}, func(workingDir string) (interface{}, error) {
return PrStatus{}, nil
})
}
func NewAlwaysFailsFakeGitHub() *FakeGitHub {
return NewFakeGitHub(func(command Command, args []string) (bool, error) {
return false, errors.New("synthetic error")
}, func(workingDir string) (interface{}, error) {
return nil, errors.New("synthetic error")
})
}
func NewAlwaysThrowNoPRFound() *FakeGitHub {
return NewFakeGitHub(func(command Command, args []string) (bool, error) {
workingDir, branchName := args[0], args[1]
return false, &NoPRFoundError{Path: workingDir, BranchName: branchName}
}, func(workingDir string) (interface{}, error) {
panic("should not be invoked")
})
}
func NewAlwaysReturnsFalseFakeGitHub() *FakeGitHub {
return NewFakeGitHub(func(command Command, args []string) (bool, error) {
return false, nil
}, func(workingDir string) (interface{}, error) {
return PrStatus{}, nil
})
}
func NewAlwaysFailsOnGetDefaultBranchFakeGitHub() *FakeGitHub {
return NewFakeGitHub(func(command Command, args []string) (bool, error) {
if command == GetDefaultBranchName {
return false, errors.New("synthetic error")
}
return true, nil
}, func(workingDir string) (interface{}, error) {
return PrStatus{}, nil
})
}
type Command int
const (
ForkAndClone Command = iota
Clone
CreatePullRequest
ClosePullRequest
GetDefaultBranchName
UpdatePRDescription
)