elvish/pkg/eval/eval_test.go
2021-01-05 16:05:34 +00:00

172 lines
4.1 KiB
Go

package eval_test
import (
"bytes"
"reflect"
"strconv"
"strings"
"sync"
"syscall"
"testing"
. "github.com/elves/elvish/pkg/eval"
. "github.com/elves/elvish/pkg/eval/evaltest"
"github.com/elves/elvish/pkg/eval/vals"
"github.com/elves/elvish/pkg/parse"
"github.com/elves/elvish/pkg/prog"
"github.com/elves/elvish/pkg/testutil"
)
func TestPid(t *testing.T) {
pid := strconv.Itoa(syscall.Getpid())
Test(t, That("put $pid").Puts(pid))
}
func TestNumBgJobs(t *testing.T) {
Test(t,
That("put $num-bg-jobs").Puts("0"),
// TODO(xiaq): Test cases where $num-bg-jobs > 0. This cannot be done
// with { put $num-bg-jobs }& because the output channel may have
// already been closed when the closure is run.
)
}
func TestArgs(t *testing.T) {
Test(t,
That("put $args").Puts(vals.EmptyList))
TestWithSetup(t,
func(ev *Evaler) { ev.SetArgs([]string{"foo", "bar"}) },
That("put $args").Puts(vals.MakeList("foo", "bar")))
}
func TestEvalTimeDeprecate(t *testing.T) {
restore := prog.SetShowDeprecations(true)
defer restore()
_, cleanup := testutil.InTestDir()
defer cleanup()
TestWithSetup(t, func(ev *Evaler) {
ev.AddGlobal(NsBuilder{}.AddGoFn("", "dep", func(fm *Frame) {
fm.Deprecate("deprecated", nil)
}).Ns())
},
That("dep").PrintsStderrWith("deprecated"),
// Deprecation message is only shown once.
That("dep 2> tmp.txt; dep").DoesNothing(),
)
}
func TestCompileTimeDeprecation(t *testing.T) {
restore := prog.SetShowDeprecations(true)
defer restore()
ev := NewEvaler()
errOutput := new(bytes.Buffer)
parseErr, compileErr := ev.Check(parse.Source{Code: "ord a"}, errOutput)
if parseErr != nil {
t.Errorf("got parse err %v", parseErr)
}
if compileErr != nil {
t.Errorf("got compile err %v", compileErr)
}
warning := errOutput.String()
wantWarning := `the "ord" command is deprecated`
if !strings.Contains(warning, wantWarning) {
t.Errorf("got warning %q, want warning containing %q", warning, wantWarning)
}
}
func TestMultipleEval(t *testing.T) {
texts := []string{"x=hello", "put $x"}
r := EvalAndCollect(t, NewEvaler(), texts)
wantOuts := []interface{}{"hello"}
if r.Exception != nil {
t.Errorf("eval %s => %v, want nil", texts, r.Exception)
}
if !reflect.DeepEqual(r.ValueOut, wantOuts) {
t.Errorf("eval %s outputs %v, want %v", texts, r.ValueOut, wantOuts)
}
}
func TestConcurrentEval(t *testing.T) {
// Run this test with "go test -race".
ev := NewEvaler()
src := parse.Source{Name: "[test]", Code: ""}
var wg sync.WaitGroup
wg.Add(2)
go func() {
ev.Eval(src, EvalCfg{})
wg.Done()
}()
go func() {
ev.Eval(src, EvalCfg{})
wg.Done()
}()
wg.Wait()
}
type fooOpts struct{ Opt string }
func (*fooOpts) SetDefaultOptions() {}
func TestCall(t *testing.T) {
ev := NewEvaler()
var gotOpt, gotArg string
fn := NewGoFn("foo", func(fm *Frame, opts fooOpts, arg string) {
gotOpt = opts.Opt
gotArg = arg
})
passedArg := "arg value"
passedOpt := "opt value"
ev.Call(fn,
CallCfg{
Args: []interface{}{passedArg},
Opts: map[string]interface{}{"opt": passedOpt},
From: "[TestCall]"},
EvalCfg{})
if gotArg != passedArg {
t.Errorf("got arg %q, want %q", gotArg, passedArg)
}
if gotOpt != passedOpt {
t.Errorf("got opt %q, want %q", gotOpt, passedOpt)
}
}
var checkTests = []struct {
name string
code string
wantParseErr bool
wantCompileErr bool
}{
{name: "no error", code: "put $nil"},
{name: "parse error only", code: "put [",
wantParseErr: true},
{name: "compile error only", code: "put $x",
wantCompileErr: true},
{name: "both parse and compile error", code: "put [$x",
wantParseErr: true, wantCompileErr: true},
}
func TestCheck(t *testing.T) {
ev := NewEvaler()
for _, test := range checkTests {
t.Run(test.name, func(t *testing.T) {
parseErr, compileErr := ev.Check(parse.Source{Code: test.code}, nil)
if (parseErr != nil) != test.wantParseErr {
t.Errorf("got parse error %v, when wantParseErr = %v",
parseErr, test.wantParseErr)
}
if (compileErr != nil) != test.wantCompileErr {
t.Errorf("got compile error %v, when wantCompileErr = %v",
compileErr, test.wantCompileErr)
}
})
}
}