129 lines
3.8 KiB
Go
129 lines
3.8 KiB
Go
/*
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Copyright 2018 the Velero contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package clientmgmt
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import (
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"reflect"
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"testing"
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"github.com/pkg/errors"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/mock"
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"github.com/stretchr/testify/require"
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"github.com/vmware-tanzu/velero/pkg/plugin/framework"
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)
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type restartableDelegateTest struct {
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function string
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inputs []interface{}
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expectedErrorOutputs []interface{}
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expectedDelegateOutputs []interface{}
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}
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type mockable interface {
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Test(t mock.TestingT)
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On(method string, args ...interface{}) *mock.Call
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AssertExpectations(t mock.TestingT) bool
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}
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func runRestartableDelegateTests(
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t *testing.T,
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kind framework.PluginKind,
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newRestartable func(key kindAndName, p RestartableProcess) interface{},
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newMock func() mockable,
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tests ...restartableDelegateTest,
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) {
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for _, tc := range tests {
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t.Run(tc.function, func(t *testing.T) {
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p := new(mockRestartableProcess)
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p.Test(t)
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defer p.AssertExpectations(t)
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// getDelegate error
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p.On("resetIfNeeded").Return(errors.Errorf("reset error")).Once()
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name := "delegateName"
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key := kindAndName{kind: kind, name: name}
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r := newRestartable(key, p)
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// Get the method we're going to call using reflection
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method := reflect.ValueOf(r).MethodByName(tc.function)
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require.NotEmpty(t, method)
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// Convert the test case inputs ([]interface{}) to []reflect.Value
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var inputValues []reflect.Value
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for i := range tc.inputs {
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inputValues = append(inputValues, reflect.ValueOf(tc.inputs[i]))
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}
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// Invoke the method being tested
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actual := method.Call(inputValues)
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// This function asserts that the actual outputs match the expected outputs
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checkOutputs := func(expected []interface{}, actual []reflect.Value) {
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require.Equal(t, len(expected), len(actual))
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for i := range actual {
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// Get the underlying value from the reflect.Value
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a := actual[i].Interface()
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// Check if it's an error
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actualErr, actualErrOk := a.(error)
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// Check if the expected output element is an error
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expectedErr, expectedErrOk := expected[i].(error)
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// If both are errors, use EqualError
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if actualErrOk && expectedErrOk {
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assert.EqualError(t, actualErr, expectedErr.Error())
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continue
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}
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// If function returns nil as struct return type, we cannot just
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// compare the interface to nil as its type will not be nil,
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// only the value will be
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if expected[i] == nil && reflect.ValueOf(a).Kind() == reflect.Ptr {
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assert.True(t, reflect.ValueOf(a).IsNil())
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continue
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}
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// Otherwise, use plain Equal
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assert.Equal(t, expected[i], a)
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}
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}
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// Make sure we get what we expected when getDelegate returned an error
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checkOutputs(tc.expectedErrorOutputs, actual)
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// Invoke delegate, make sure all returned values are passed through
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p.On("resetIfNeeded").Return(nil)
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delegate := newMock()
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delegate.Test(t)
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defer delegate.AssertExpectations(t)
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p.On("getByKindAndName", key).Return(delegate, nil)
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// Set up the mocked method in the delegate
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delegate.On(tc.function, tc.inputs...).Return(tc.expectedDelegateOutputs...)
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// Invoke the method being tested
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actual = method.Call(inputValues)
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// Make sure we get what we expected when invoking the delegate
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checkOutputs(tc.expectedDelegateOutputs, actual)
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})
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}
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}
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