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console.go
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console.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package testing
import (
"fmt"
"io"
"os"
"runtime"
"strings"
"github.com/fatih/color"
"github.com/mattn/go-colorable"
)
// ConsoleDriver outputs test result to the given stdout/stderr descriptors
type ConsoleDriver struct {
Stdout io.Writer
level int
reported bool
killer func()
result string
}
// NewConsoleDriver initializes and returns a new console driver with output to given file
func NewConsoleDriver(stdout io.Writer) *ConsoleDriver {
return NewConsoleDriverWithKiller(stdout, func() { os.Exit(1) })
}
// NewConsoleDriverWithKiller initializes and returns a new console driver with output file
// Killer function will be called on fatal errors
func NewConsoleDriverWithKiller(stdout io.Writer, killer func()) *ConsoleDriver {
// On Windows we must wrap file outputs with a Colorable to achieve the right
// escape sequences.
if f, ok := stdout.(*os.File); ok && runtime.GOOS == "windows" {
stdout = colorable.NewColorable(f)
}
return &ConsoleDriver{
Stdout: stdout,
level: 0,
killer: killer,
reported: true,
}
}
func (d *ConsoleDriver) Run(name string, f func(Driver)) {
if !d.reported {
fmt.Fprintln(d.Stdout, "")
}
d.printf("%s...", name)
// Run sub func
driver := &ConsoleDriver{
Stdout: d.Stdout,
level: d.level + 1,
killer: d.killer,
}
f(driver)
if !driver.reported {
color.New(color.FgGreen).Fprintf(driver.Stdout, "OK\n")
driver.reported = true
}
if driver.result != "" {
driver.Info("result", driver.indent(driver.result))
}
d.reported = true
}
func (d *ConsoleDriver) Info(field, value string) {
if !d.reported {
fmt.Fprintln(d.Stdout, "")
}
d.printf("%s: %s\n", field, value)
d.reported = true
}
func (d *ConsoleDriver) Warn(field, reason string) {
if !d.reported {
fmt.Fprintln(d.Stdout, "")
}
d.printf("%s... ", field)
color.New(color.FgYellow).Fprintf(d.Stdout, "WARN ")
fmt.Fprintln(d.Stdout, reason)
d.reported = true
}
func (d *ConsoleDriver) Error(field string, err error) {
if err == nil {
d.ok(field)
return
}
d.error(field, err)
}
func (d *ConsoleDriver) Fatal(field string, err error) {
if err == nil {
d.ok(field)
return
}
d.error(field, err)
d.killer()
}
func (d *ConsoleDriver) Result(data string) {
d.result = data
}
func (d *ConsoleDriver) ok(field string) {
if !d.reported {
fmt.Fprintln(d.Stdout, "")
}
d.printf("%s... ", field)
color.New(color.FgGreen).Fprintf(d.Stdout, "OK\n")
d.reported = true
}
func (d *ConsoleDriver) error(field string, err error) {
if !d.reported {
fmt.Fprintln(d.Stdout, "")
}
d.printf("%s... ", field)
color.New(color.FgRed).Fprintf(d.Stdout, "ERROR ")
fmt.Fprintln(d.Stdout, err.Error())
d.reported = true
}
func (d *ConsoleDriver) printf(format string, args ...interface{}) {
for i := 0; i < d.level; i++ {
fmt.Fprint(d.Stdout, " ")
}
fmt.Fprintf(d.Stdout, format, args...)
}
func (d *ConsoleDriver) indent(data string) string {
res := "\n"
for _, line := range strings.Split(data, "\n") {
res += strings.Repeat(" ", d.level+2) + line + "\n"
}
return res
}