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package main
import (
"bytes"
"io/ioutil"
"os"
"runtime"
"strings"
"testing"
)
func expectBufferEquality(t *testing.T, name string, buffer *bytes.Buffer, expected string) {
output := buffer.String()
if output != expected {
t.Errorf("incorrect %s: \n%sexpected %s: \n%s", name, output, name, expected)
t.Log([]rune(output))
t.Log([]rune(expected))
}
}
func expectProcessMainResults(t *testing.T, input string, args []string, exitCode int, expectedOutput string, expectedError string) {
inputReader := strings.NewReader(input)
outputBuffer := new(bytes.Buffer)
errorBuffer := new(bytes.Buffer)
returnCode := processMain(args, inputReader, outputBuffer, errorBuffer)
expectBufferEquality(t, "output", outputBuffer, expectedOutput)
expectBufferEquality(t, "error", errorBuffer, expectedError)
if returnCode != exitCode {
t.Error("incorrect return code:", returnCode, "expected", exitCode)
}
}
func TestProcessMainReadFromStdin(t *testing.T) {
expectedOutput := `
[mytoml]
a = 42.0
`
input := `{
"mytoml": {
"a": 42
}
}
`
expectedError := ``
expectedExitCode := 0
expectProcessMainResults(t, input, []string{}, expectedExitCode, expectedOutput, expectedError)
}
func TestProcessMainReadFromFile(t *testing.T) {
input := `{
"mytoml": {
"a": 42
}
}
`
tmpfile, err := ioutil.TempFile("", "example.json")
if err != nil {
t.Fatal(err)
}
if _, err := tmpfile.Write([]byte(input)); err != nil {
t.Fatal(err)
}
defer os.Remove(tmpfile.Name())
expectedOutput := `
[mytoml]
a = 42.0
`
expectedError := ``
expectedExitCode := 0
expectProcessMainResults(t, ``, []string{tmpfile.Name()}, expectedExitCode, expectedOutput, expectedError)
}
func TestProcessMainReadFromMissingFile(t *testing.T) {
var expectedError string
if runtime.GOOS == "windows" {
expectedError = `open /this/file/does/not/exist: The system cannot find the path specified.
`
} else {
expectedError = `open /this/file/does/not/exist: no such file or directory
`
}
expectProcessMainResults(t, ``, []string{"/this/file/does/not/exist"}, -1, ``, expectedError)
}
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