mirror of
https://github.com/coredns/coredns.git
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105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package root
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import (
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"fmt"
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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/coredns/coredns/core/dnsserver"
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"github.com/mholt/caddy"
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)
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func TestRoot(t *testing.T) {
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// Predefined error substrings
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parseErrContent := "Error during parsing:"
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unableToAccessErrContent := "unable to access root path"
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existingDirPath, err := getTempDirPath()
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if err != nil {
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t.Fatalf("BeforeTest: Failed to find an existing directory for testing! Error was: %v", err)
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}
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nonExistingDir := filepath.Join(existingDirPath, "highly_unlikely_to_exist_dir")
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existingFile, err := ioutil.TempFile("", "root_test")
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if err != nil {
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t.Fatalf("BeforeTest: Failed to create temp file for testing! Error was: %v", err)
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}
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defer func() {
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existingFile.Close()
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os.Remove(existingFile.Name())
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}()
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inaccessiblePath := getInaccessiblePath(existingFile.Name())
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tests := []struct {
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input string
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shouldErr bool
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expectedRoot string // expected root, set to the controller. Empty for negative cases.
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expectedErrContent string // substring from the expected error. Empty for positive cases.
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}{
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// positive
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{
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fmt.Sprintf(`root %s`, nonExistingDir), false, nonExistingDir, "",
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},
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{
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fmt.Sprintf(`root %s`, existingDirPath), false, existingDirPath, "",
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},
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// negative
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{
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`root `, true, "", parseErrContent,
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},
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{
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fmt.Sprintf(`root %s`, inaccessiblePath), true, "", unableToAccessErrContent,
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},
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{
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fmt.Sprintf(`root {
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%s
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}`, existingDirPath), true, "", parseErrContent,
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},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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err := setup(c)
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cfg := dnsserver.GetConfig(c)
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: Expected error but found %s for input %s", i, err, test.input)
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}
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if err != nil {
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if !test.shouldErr {
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t.Errorf("Test %d: Expected no error but found one for input %s. Error was: %v", i, test.input, err)
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}
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if !strings.Contains(err.Error(), test.expectedErrContent) {
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t.Errorf("Test %d: Expected error to contain: %v, found error: %v, input: %s", i, test.expectedErrContent, err, test.input)
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}
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}
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// check root only if we are in a positive test.
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if !test.shouldErr && test.expectedRoot != cfg.Root {
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t.Errorf("Root not correctly set for input %s. Expected: %s, actual: %s", test.input, test.expectedRoot, cfg.Root)
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}
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}
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}
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// getTempDirPath returns the path to the system temp directory. If it does not exist - an error is returned.
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func getTempDirPath() (string, error) {
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tempDir := os.TempDir()
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_, err := os.Stat(tempDir)
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if err != nil {
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return "", err
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}
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return tempDir, nil
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}
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func getInaccessiblePath(file string) string {
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return filepath.Join("C:", "file\x00name") // null byte in filename is not allowed on Windows AND unix
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}
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