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save_test.go
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save_test.go
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package oak
import (
"io/ioutil"
"os"
"testing"
"oak/token"
)
func TestSaveLoad(t *testing.T) {
file, err := ioutil.TempFile(".", "*.img")
if err != nil {
t.Fatalf("tmp file: %s", err)
}
defer os.Remove(file.Name())
m1 := New(os.Stdout)
w := Word{
N: "dB",
T: []token.Token{
{Text: ":", Type: token.Colon},
{Text: "dB", Type: token.Identifier},
{Text: "log", Type: token.Identifier},
{Text: "10", Type: token.Number},
{Text: "*", Type: token.Operator},
{Text: ";", Type: token.Semicolon},
},
}
err = w.Compile(m1)
if err != nil {
t.Fatalf("compile: %s", err)
} else if l := len(w.E); l != 3 {
t.Fatalf("dB: invalid length %d", l)
}
m1.Install(&w)
m1.SetFixed(3)
_, err = m1.Eval(1, []Expr{Number(3), Number(2), Number(1), Add})
if err != nil {
t.Fatalf("add: %s", err)
}
_, err = m1.Eval(1, []Expr{Number(4), m1.Word("dB"), Swap})
if err != nil {
t.Fatalf("dB: %s", err)
}
// now we'll save the machine, and read it into a new, clean
// machine, and see if we still have the values and variables
if _, err = m1.Eval(1, []Expr{String(file.Name()), Save}); err != nil {
t.Fatalf("save: %s", err)
}
m2 := New(os.Stdout)
if _, err = m2.Eval(1, []Expr{String(file.Name()), Load}); err != nil {
t.Fatalf("load: %s", err)
}
// and see how we're doing
v, err := m2.Eval(2, []Expr{Number(2), GetSymbol("$1"), Add, Show})
if err != nil {
t.Fatalf("get: %s", err)
}
// eval results are the strings we print
r, ok := v.(string)
if !ok {
t.Errorf("recall: %#v %[1]T", v)
}
if r != "5.000" {
t.Errorf("invalid result: %#v", r)
}
v, err = m2.Eval(2, []Expr{Number(4), m2.Word("dB"), Show})
if err != nil {
t.Fatalf("dB: %s", err)
}
r, ok = v.(string)
if !ok {
t.Errorf("recall: %#v %[1]T", v)
}
if r != "6.021" {
t.Errorf("invalid result: %#v", r)
}
}