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package main
import (
"fmt"
"io"
"io/ioutil"
"log"
"os"
"sort"
"strconv"
"strings"
"testing"
"bou.ke/monkey"
"github.com/posener/complete/v2"
)
func TestPredictions(t *testing.T) {
t.Parallel()
tests := []struct {
name string
predictor complete.Predictor
prefix string
want []string
}{
{
name: "predict tests ok",
predictor: predictTest,
want: []string{
"TestPredictions",
"Example",
"TestErrorSupression",
},
},
{
name: "predict benchmark ok",
predictor: predictBenchmark,
want: []string{"BenchmarkFake"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tt.predictor.Predict(tt.prefix)
if !equal(got, tt.want) {
t.Errorf("Failed %s: got: %q, want: %q", t.Name(), got, tt.want)
}
})
}
}
func BenchmarkFake(b *testing.B) {}
func Example() {
p := monkey.Patch(os.Exit, func(int) {})
defer p.Unpatch()
os.Setenv("COMP_LINE", "go ru")
os.Setenv("COMP_POINT", "5")
main()
// output: run
}
func equal(s1, s2 []string) bool {
sort.Strings(s1)
sort.Strings(s2)
if len(s1) != len(s2) {
return false
}
for i := range s1 {
if s1[i] != s2[i] {
return false
}
}
return true
}
func TestErrorSupression(t *testing.T) {
defer monkey.Patch(os.Exit, func(int) {}).Unpatch()
// Completion API environment variable names.
const envLine, envPoint = "COMP_LINE", "COMP_POINT"
// line should work out to
//
// * on most POSIX:
// go test /tmp/
// * on MacOS X:
// go test /var/folders/<randomized_pathname>/T//
// * on Windows:
// go test C:\Users\<username>\AppData\Local\Temp\
//
// which should trigger "failed importing directory: ... no
// buildable Go source files..." error messages.
var line = "go test " + os.TempDir() + string(os.PathSeparator)
defer os.Unsetenv(envLine)
defer os.Unsetenv(envPoint)
os.Setenv(envLine, line)
os.Setenv(envPoint, strconv.Itoa(len(line)))
tests := []struct {
verbose string
wantErr bool
}{{
verbose: "",
wantErr: false,
}, {
verbose: "1",
wantErr: true,
}}
for _, tt := range tests {
t.Run(fmt.Sprintf(
"%s=%q", envVerbose, tt.verbose,
), func(t *testing.T) {
// Discard completion (stdout).
r, w, err := os.Pipe()
if err != nil {
t.Fatal(err)
}
defer w.Close()
defer func(o *os.File) { os.Stdout = o }(os.Stdout)
os.Stdout = w
go io.Copy(ioutil.Discard, r)
// "Redirect" stderr into a buffer.
b := &strings.Builder{}
log.SetOutput(b)
defer os.Unsetenv(envVerbose)
os.Setenv(envVerbose, tt.verbose)
main()
gotErr := b.Len() != 0
if tt.wantErr && !gotErr {
t.Fatal("want something in stderr, got nothing")
} else if !tt.wantErr && gotErr {
t.Fatalf("want nothing in stderr, got %d bytes",
b.Len())
}
})
}
}
|
