28e9bbbbf4
The E2E suite exercises the API, but not the CLI. This changeset adds a helper function to send commands via a locally-built Nomad binary (which we'll need to add to the E2E setup), and some helpers to parse the resulting structured outputs in a way that tests can consume.
102 lines
3 KiB
Go
102 lines
3 KiB
Go
package e2eutil
|
|
|
|
import (
|
|
"fmt"
|
|
"os/exec"
|
|
"regexp"
|
|
"strings"
|
|
)
|
|
|
|
// Command sends a command line argument to Nomad and returns the unbuffered
|
|
// stdout as a string (or, if there's an error, the stderr)
|
|
func Command(cmd string, args ...string) (string, error) {
|
|
out, err := exec.Command(cmd, args...).CombinedOutput()
|
|
return string(out), err
|
|
}
|
|
|
|
// GetField returns the value of an output field (ex. the "Submit Date" field
|
|
// of `nomad job status :id`)
|
|
func GetField(output, key string) (string, error) {
|
|
re := regexp.MustCompile(`(?m)^` + key + ` += (.*)$`)
|
|
match := re.FindStringSubmatch(output)
|
|
if match == nil {
|
|
return "", fmt.Errorf("could not find field %q", key)
|
|
}
|
|
return match[1], nil
|
|
}
|
|
|
|
// GetSection returns a section, with its field header but without its title.
|
|
// (ex. the Allocations section of `nomad job status :id`)
|
|
func GetSection(output, key string) (string, error) {
|
|
|
|
// golang's regex engine doesn't support negative lookahead, so
|
|
// we can't stop at 2 newlines if we also want a section that includes
|
|
// single newlines. so split on the section title, and then split a second time
|
|
// on \n\n
|
|
re := regexp.MustCompile(`(?ms)^` + key + `\n(.*)`)
|
|
match := re.FindStringSubmatch(output)
|
|
if match == nil {
|
|
return "", fmt.Errorf("could not find section %q", key)
|
|
}
|
|
tail := match[1]
|
|
return strings.Split(tail, "\n\n")[0], nil
|
|
}
|
|
|
|
// ParseColumns maps the CLI output for a columized section (without title) to
|
|
// a slice of key->value pairs for each row in that section.
|
|
// (ex. the Allocations section of `nomad job status :id`)
|
|
func ParseColumns(section string) ([]map[string]string, error) {
|
|
parsed := []map[string]string{}
|
|
|
|
// field names and values are deliminated by two or more spaces, but can have a
|
|
// single space themselves. compress all the delimiters into a tab so we can
|
|
// break the fields on that
|
|
re := regexp.MustCompile(" {2,}")
|
|
section = re.ReplaceAllString(section, "\t")
|
|
rows := strings.Split(section, "\n")
|
|
|
|
breakFields := func(row string) []string {
|
|
return strings.FieldsFunc(row, func(c rune) bool { return c == '\t' })
|
|
}
|
|
|
|
fieldNames := breakFields(rows[0])
|
|
|
|
for _, row := range rows[1:] {
|
|
if row == "" {
|
|
continue
|
|
}
|
|
r := map[string]string{}
|
|
vals := breakFields(row)
|
|
for i, val := range vals {
|
|
if i >= len(fieldNames) {
|
|
return parsed, fmt.Errorf("section is misaligned with header\n%v", section)
|
|
}
|
|
|
|
r[fieldNames[i]] = val
|
|
}
|
|
parsed = append(parsed, r)
|
|
}
|
|
return parsed, nil
|
|
}
|
|
|
|
// ParseFields maps the CLI output for a key-value section (without title) to
|
|
// map of the key->value pairs in that section
|
|
// (ex. the Latest Deployment section of `nomad job status :id`)
|
|
func ParseFields(section string) (map[string]string, error) {
|
|
parsed := map[string]string{}
|
|
rows := strings.Split(strings.TrimSpace(section), "\n")
|
|
for _, row := range rows {
|
|
kv := strings.Split(row, "=")
|
|
if len(kv) == 0 {
|
|
continue
|
|
}
|
|
key := strings.TrimSpace(kv[0])
|
|
if len(kv) == 1 {
|
|
parsed[key] = ""
|
|
} else {
|
|
parsed[key] = strings.TrimSpace(strings.Join(kv[1:], " "))
|
|
}
|
|
}
|
|
return parsed, nil
|
|
}
|