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// Copyright 2017 The Bazel Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package starlark_test
// This file defines tests of the Value API.
import (
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
"go.starlark.net/starlark"
)
func TestStringMethod(t *testing.T) {
s := starlark.String("hello")
for i, test := range [][2]string{
// quoted string:
{s.String(), `"hello"`},
{fmt.Sprintf("%s", s), `"hello"`},
{fmt.Sprintf("%+s", s), `"hello"`},
{fmt.Sprintf("%v", s), `"hello"`},
{fmt.Sprintf("%+v", s), `"hello"`},
// unquoted:
{s.GoString(), `hello`},
{fmt.Sprintf("%#v", s), `hello`},
} {
got, want := test[0], test[1]
if got != want {
t.Errorf("#%d: got <<%s>>, want <<%s>>", i, got, want)
}
}
}
func TestListAppend(t *testing.T) {
l := starlark.NewList(nil)
l.Append(starlark.String("hello"))
res, ok := starlark.AsString(l.Index(0))
if !ok {
t.Errorf("failed list.Append() got: %s, want: starlark.String", l.Index(0).Type())
}
if res != "hello" {
t.Errorf("failed list.Append() got: %+v, want: hello", res)
}
}
func TestParamDefault(t *testing.T) {
tests := []struct {
desc string
starFn string
wantDefaults []starlark.Value
}{
{
desc: "function with all required params",
starFn: "all_required",
wantDefaults: []starlark.Value{nil, nil, nil},
},
{
desc: "function with all optional params",
starFn: "all_opt",
wantDefaults: []starlark.Value{
starlark.String("a"),
starlark.None,
starlark.String(""),
},
},
{
desc: "function with required and optional params",
starFn: "mix_required_opt",
wantDefaults: []starlark.Value{
nil,
nil,
starlark.String("c"),
starlark.String("d"),
},
},
{
desc: "function with required, optional, and varargs params",
starFn: "with_varargs",
wantDefaults: []starlark.Value{
nil,
starlark.String("b"),
nil,
},
},
{
desc: "function with required, optional, varargs, and keyword-only params",
starFn: "with_varargs_kwonly",
wantDefaults: []starlark.Value{
nil,
starlark.String("b"),
starlark.String("c"),
nil,
nil,
},
},
{
desc: "function with required, optional, and keyword-only params",
starFn: "with_kwonly",
wantDefaults: []starlark.Value{
nil,
starlark.String("b"),
starlark.String("c"),
nil,
},
},
{
desc: "function with required, optional, and kwargs params",
starFn: "with_kwargs",
wantDefaults: []starlark.Value{
nil,
starlark.String("b"),
starlark.String("c"),
nil,
},
},
{
desc: "function with required, optional, varargs, kw-only, and kwargs params",
starFn: "with_varargs_kwonly_kwargs",
wantDefaults: []starlark.Value{
nil,
starlark.String("b"),
starlark.String("c"),
nil,
starlark.String("e"),
nil,
nil,
},
},
}
for _, tt := range tests {
t.Run(tt.desc, func(t *testing.T) {
thread := &starlark.Thread{}
filename := "testdata/function_param.star"
globals, err := starlark.ExecFile(thread, filename, nil, nil)
if err != nil {
t.Fatalf("ExecFile(%v, %q) failed: %v", thread, filename, err)
}
fn, ok := globals[tt.starFn].(*starlark.Function)
if !ok {
t.Fatalf("value %v is not a Starlark function", globals[tt.starFn])
}
var paramDefaults []starlark.Value
for i := 0; i < fn.NumParams(); i++ {
paramDefaults = append(paramDefaults, fn.ParamDefault(i))
}
if diff := cmp.Diff(tt.wantDefaults, paramDefaults); diff != "" {
t.Errorf("param defaults got diff (-want +got):\n%s", diff)
}
})
}
}
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