113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
/*
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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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https://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 testutil
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import (
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"bytes"
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"flag"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/spf13/cobra"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// UpdateGolden writes out the golden files with the latest values, rather than failing the test.
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var shouldUpdateGolden = flag.Bool("update", false, "update golden files")
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const (
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testdataDir = "testdata"
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goldenDirSuffix = "GoldenOutput"
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goldenFileSuffix = ".golden"
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)
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// CmdTest is a command to be run on the command line as a test
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type CmdTest struct {
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// The name of the test. This will be used when generating golden
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// files
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Name string
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// The values that would be inputted to airshipctl as commands, flags,
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// and arguments. The initial "airshipctl" is implied
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CmdLine string
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// The instantiated version of the root airshipctl command to test
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Cmd *cobra.Command
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// The expected error
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Error error
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}
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// RunTest either asserts that a specific command's output matches the expected
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// output from its golden file, or generates golden files if the -update flag
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// is passed
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func RunTest(t *testing.T, test *CmdTest) {
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t.Helper()
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cmd := test.Cmd
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actual := &bytes.Buffer{}
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cmd.SetOut(actual)
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args := strings.Fields(test.CmdLine)
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cmd.SetArgs(args)
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err := cmd.Execute()
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checkError(t, err, test.Error)
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if *shouldUpdateGolden {
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updateGolden(t, test, actual.Bytes())
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} else {
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assertEqualGolden(t, test, actual.Bytes())
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}
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}
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func updateGolden(t *testing.T, test *CmdTest, actual []byte) {
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t.Helper()
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goldenDir := filepath.Join(testdataDir, t.Name()+goldenDirSuffix)
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err := os.MkdirAll(goldenDir, 0775)
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require.NoErrorf(t, err, "Failed to create golden directory %s", goldenDir)
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t.Logf("Created %s", goldenDir)
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goldenFilePath := filepath.Join(goldenDir, test.Name+goldenFileSuffix)
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t.Logf("Updating golden file: %s", goldenFilePath)
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err = ioutil.WriteFile(goldenFilePath, normalize(actual), 0600)
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require.NoErrorf(t, err, "Failed to update golden file at %s", goldenFilePath)
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}
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func assertEqualGolden(t *testing.T, test *CmdTest, actual []byte) {
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t.Helper()
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goldenDir := filepath.Join(testdataDir, t.Name()+goldenDirSuffix)
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goldenFilePath := filepath.Join(goldenDir, test.Name+goldenFileSuffix)
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golden, err := ioutil.ReadFile(goldenFilePath)
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require.NoErrorf(t, err, "Failed while reading golden file at %s", goldenFilePath)
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assert.Equal(t, string(golden), string(actual))
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}
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func checkError(t *testing.T, actual, expected error) {
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t.Helper()
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if expected == nil {
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require.NoError(t, actual)
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} else {
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require.Error(t, actual)
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}
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}
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func normalize(in []byte) []byte {
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return bytes.Replace(in, []byte("\r\n"), []byte("\n"), -1)
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}
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