From 8654aacea3fb6937e8b1d421f8dd2caad422e8b6 Mon Sep 17 00:00:00 2001
From: Dan Buch <daniel.buch@gmail.com>
Date: Mon, 24 Dec 2012 00:12:11 -0500
Subject: [PATCH] Starting work on rendering out simplates to Go sources.

---
 gotime/smplt/simplate.go   | 14 +++++++++
 gotime/smplt/smplt_test.go | 59 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)

diff --git a/gotime/smplt/simplate.go b/gotime/smplt/simplate.go
index ec7ac31..3ca88f8 100644
--- a/gotime/smplt/simplate.go
+++ b/gotime/smplt/simplate.go
@@ -1,6 +1,8 @@
 package smplt
 
 import (
+	"bufio"
+	"io"
 	"mime"
 	"path"
 	"strings"
@@ -63,3 +65,15 @@ func SimplateFromString(filename, content string) *Simplate {
 
 	return s
 }
+
+func (me *Simplate) Execute(wr io.Writer, data interface{}) error {
+	outbuf := bufio.NewWriter(wr)
+	defer outbuf.Flush()
+
+	_, err := outbuf.WriteString("package smplt_gen\n")
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
diff --git a/gotime/smplt/smplt_test.go b/gotime/smplt/smplt_test.go
index b633b79..8a465c0 100644
--- a/gotime/smplt/smplt_test.go
+++ b/gotime/smplt/smplt_test.go
@@ -1,8 +1,16 @@
 package smplt_test
 
 import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"go/parser"
+	"go/token"
 	"mime"
+	"os"
+	"path"
 	"testing"
+	"time"
 
 	. "github.com/meatballhat/box-o-sand/gotime/smplt"
 )
@@ -66,6 +74,25 @@ D := &Dance{
 `
 )
 
+var (
+	tmpdir = path.Join(os.TempDir(),
+		fmt.Sprintf("smplt_test-%d", time.Now().UTC().UnixNano()))
+)
+
+func mkTmpDir() {
+	err := os.MkdirAll(tmpdir, os.ModeDir|os.ModePerm)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func rmTmpDir() {
+	err := os.RemoveAll(tmpdir)
+	if err != nil {
+		panic(err)
+	}
+}
+
 func TestSimplateKnowsItsFilename(t *testing.T) {
 	s := SimplateFromString("hasty-decisions.txt", "herpherpderpherp")
 	if s.Filename != "hasty-decisions.txt" {
@@ -189,3 +216,35 @@ func TestAssignsNoTemplatePageToNegotiatedSimplates(t *testing.T) {
 		t.Errorf("Negotiated simplate had a template page assigned!: %v", s.TemplatePage)
 	}
 }
+
+func TestRenderedSimplateCanExecuteToWriter(t *testing.T) {
+	s := SimplateFromString("basic-rendered.txt", BASIC_RENDERED_TXT_SIMPLATE)
+	var out bytes.Buffer
+	err := s.Execute(bufio.NewWriter(&out), "no data needed")
+	if err != nil {
+		t.Error(err)
+	}
+}
+
+func TestRenderedSimplateOutputIsValidGoSource(t *testing.T) {
+	mkTmpDir()
+	defer rmTmpDir()
+
+	s := SimplateFromString("basic-rendered.txt", BASIC_RENDERED_TXT_SIMPLATE)
+	outfile_name := path.Join(tmpdir, "basic_rendered.go")
+	outf, err := os.Create(outfile_name)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	s.Execute(outf, "nothing here")
+	outf.Close()
+
+	fset := token.NewFileSet()
+	_, err = parser.ParseFile(fset, outfile_name, nil, parser.DeclarationErrors)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+}