vise/go/engine/engine_test.go

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package engine
import (
"bytes"
"context"
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"fmt"
"io/ioutil"
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"path"
"testing"
"git.defalsify.org/festive/resource"
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"git.defalsify.org/festive/state"
"git.defalsify.org/festive/testdata"
)
var (
dataGenerated bool = false
dataDir string = testdata.DataDir
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)
type FsWrapper struct {
*resource.FsResource
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st *state.State
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}
func NewFsWrapper(path string, st *state.State) FsWrapper {
rs := resource.NewFsResource(path)
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return FsWrapper {
&rs,
st,
}
}
func (r FsWrapper) RenderTemplate(sym string, values map[string]string) (string, error) {
return resource.DefaultRenderTemplate(r, sym, values)
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}
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func(fs FsWrapper) one(ctx context.Context) (string, error) {
return "one", nil
}
func(fs FsWrapper) inky(ctx context.Context) (string, error) {
return "tinkywinky", nil
}
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func(fs FsWrapper) FuncFor(sym string) (resource.EntryFunc, error) {
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switch sym {
case "one":
return fs.one, nil
case "inky":
return fs.inky, nil
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}
return nil, fmt.Errorf("function for %v not found", sym)
}
func(fs FsWrapper) GetCode(sym string) ([]byte, error) {
sym += ".bin"
fp := path.Join(fs.Path, sym)
r, err := ioutil.ReadFile(fp)
return r, err
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}
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func generateTestData(t *testing.T) {
if dataGenerated {
return
}
var err error
dataDir, err = testdata.Generate()
if err != nil {
t.Fatal(err)
}
}
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func TestEngineInit(t *testing.T) {
st := state.NewState(17).WithCacheSize(1024)
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generateTestData(t)
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ctx := context.TODO()
rs := NewFsWrapper(dataDir, &st)
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en := NewEngine(&st, &rs)
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err := en.Init("root", ctx)
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if err != nil {
t.Fatal(err)
}
w := bytes.NewBuffer(nil)
err = en.WriteResult(w)
if err != nil {
t.Fatal(err)
}
b := w.Bytes()
if !bytes.Equal(b, []byte("hello world")) {
t.Fatalf("expected result 'hello world', got %v", b)
}
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input := []byte("1")
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err = en.Exec(input, ctx)
if err != nil {
t.Fatal(err)
}
r := st.Where()
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if r != "foo" {
t.Fatalf("expected where-string 'foo', got %s", r)
}
w = bytes.NewBuffer(nil)
err = en.WriteResult(w)
if err != nil {
t.Fatal(err)
}
b = w.Bytes()
expect := `this is in foo
it has more lines
0:to foo
1:go bar`
if !bytes.Equal(b, []byte(expect)) {
t.Fatalf("expected\n\t%s\ngot:\n\t%s\n", expect, b)
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}
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}