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It is useful to apply the storage testsuite also to "external" (= out-of-tree) storage drivers. One way of doing that is setting up a custom E2E test suite, but that's still quite a bit of work. An easier alternative is to parameterize the Kubernetes e2e.test binary at runtime so that it instantiates the testsuite for one or more drivers. Some parameters have to be provided before starting the test because they define configuration and capabilities of the driver and its storage backend that cannot be discovered at runtime. This is done by populating the DriverDefinition with the content of the file that the new -storage.testdriver parameters points to. The universal .yaml and .json decoder from Kubernetes is used. It's flexible, but has some downsides: - currently ignores unknown fields (see https://github.com/kubernetes/kubernetes/pull/71589) - poor error messages when fields have the wrong type Storage drivers have to be installed in the test cluster before starting e2e.test. Only tests involving dynamically provisioned volumes are currently supported.
80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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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 external
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/kubernetes/test/e2e/storage/testsuites"
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)
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func TestDriverParameter(t *testing.T) {
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expected := &driverDefinition{
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DriverInfo: testsuites.DriverInfo{
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Name: "foo.example.com",
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SupportedFsType: sets.NewString(
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"", // Default fsType
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),
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},
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ShortName: "foo",
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ClaimSize: "5Gi",
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}
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testcases := []struct {
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name string
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filename string
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err string
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expected *driverDefinition
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}{
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{
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name: "no such file",
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filename: "no-such-file.yaml",
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err: "open no-such-file.yaml: no such file or directory",
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},
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{
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name: "empty file name",
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err: "missing file name",
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},
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{
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name: "yaml",
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filename: "testdata/driver.yaml",
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expected: expected,
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},
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{
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name: "json",
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filename: "testdata/driver.json",
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expected: expected,
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},
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}
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for _, testcase := range testcases {
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actual, err := testDriverParameter{}.loadDriverDefinition(testcase.filename)
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if testcase.err == "" {
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assert.NoError(t, err, testcase.name)
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} else {
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if assert.Error(t, err, testcase.name) {
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assert.Equal(t, testcase.err, err.Error())
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}
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}
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if err == nil {
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assert.Equal(t, testcase.expected, actual)
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}
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}
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}
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