programs_test.go

// Copyright 2019 The Scriggo 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 scriggo

import (
	"reflect"
	"testing"

	"github.com/open2b/scriggo/internal/compiler"
)

func TestInitPackageLevelVariables(t *testing.T) {

	// Test no globals.
	globals := initPackageLevelVariables([]compiler.Global{})
	if globals != nil {
		t.Fatalf("expected nil, got %v", globals)
	}

	// Test zero value.
	global := compiler.Global{
		Pkg:  "p",
		Name: "a",
		Type: reflect.TypeOf(0),
	}
	globals = initPackageLevelVariables([]compiler.Global{global})
	g := globals[0]
	if g.Kind() != reflect.Int {
		t.Fatalf("unexpected kind %v", g.Kind())
	}
	if g.Interface() != 0 {
		t.Fatalf("unexpected %v, expecting 0", g.Interface())
	}

	// Test pointer value in globals.
	n := 1
	global = compiler.Global{
		Pkg:   "p",
		Name:  "a",
		Type:  reflect.TypeOf(n),
		Value: reflect.ValueOf(&n).Elem(),
	}
	globals = initPackageLevelVariables([]compiler.Global{global})
	n = 2
	g = globals[0]
	if g.Kind() != reflect.Int {
		t.Fatalf("unexpected kind %v", g.Kind())
	}
	iface := g.Interface()
	if iface != n {
		t.Fatalf("unexpected %v (type %T), expecting %d (type %T)", iface, iface, n, n)
	}

}