create: Refactor NewContent to be testable

NewContent is refactored to use the afero.Fs interface that should allow
full testing.  This commit also pulls the metadata creation logic out of
NewContent and into a separate function to decrease the cyclomatic
complexity of NewContent.

create/content_test.go

@@ -0,0 +1,125 @@
+// Copyright 2016 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package create_test
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/afero"
+	"github.com/spf13/hugo/create"
+	"github.com/spf13/hugo/hugofs"
+	"github.com/spf13/viper"
+)
+
+func TestNewContent(t *testing.T) {
+	initViper()
+
+	err := initFs()
+	if err != nil {
+		t.Fatalf("initialization error: %s", err)
+	}
+
+	cases := []struct {
+		kind          string
+		path          string
+		resultStrings []string
+	}{
+		{"post", "post/sample-1.md", []string{`title = "sample 1"`, `test = "test1"`}},
+		{"stump", "stump/sample-2.md", []string{`title = "sample 2"`}},     // no archetype file
+		{"", "sample-3.md", []string{`title = "sample 3"`}},                // no archetype
+		{"product", "product/sample-4.md", []string{`title = "sample 4"`}}, // empty archetype front matter
+	}
+
+	for i, c := range cases {
+		err = create.NewContent(hugofs.SourceFs, c.kind, c.path)
+		if err != nil {
+			t.Errorf("[%d] NewContent: %s", i, err)
+		}
+
+		fname := filepath.Join(os.TempDir(), "content", filepath.FromSlash(c.path))
+		_, err = hugofs.SourceFs.Stat(fname)
+		if err != nil {
+			t.Errorf("[%d] Stat: %s", i, err)
+		}
+
+		for _, v := range c.resultStrings {
+			found, err := afero.FileContainsBytes(hugofs.SourceFs, fname, []byte(v))
+			if err != nil {
+				t.Errorf("[%d] FileContainsBytes: %s", i, err)
+			}
+			if !found {
+				t.Errorf("content missing from output: %q", v)
+			}
+		}
+	}
+}
+
+func initViper() {
+	viper.Reset()
+	viper.Set("MetaDataFormat", "toml")
+	viper.Set("archetypeDir", filepath.Join(os.TempDir(), "archetypes"))
+	viper.Set("contentDir", filepath.Join(os.TempDir(), "content"))
+	viper.Set("themesDir", filepath.Join(os.TempDir(), "themes"))
+	viper.Set("theme", "sample")
+}
+
+func initFs() error {
+	hugofs.SourceFs = new(afero.MemMapFs)
+	perm := os.FileMode(0755)
+	var err error
+
+	// create directories
+	dirs := []string{
+		"archetypes",
+		"content",
+		filepath.Join("themes", "sample", "archetypes"),
+	}
+	for _, dir := range dirs {
+		dir = filepath.Join(os.TempDir(), dir)
+		err = hugofs.SourceFs.Mkdir(dir, perm)
+		if err != nil {
+			return err
+		}
+	}
+
+	// create files
+	for _, v := range []struct {
+		path    string
+		content string
+	}{
+		{
+			path:    filepath.Join(os.TempDir(), "archetypes", "post.md"),
+			content: "+++\ndate = \"2015-01-12T19:20:04-07:00\"\ntitle = \"post arch\"\ntest = \"test1\"\n+++\n",
+		},
+		{
+			path:    filepath.Join(os.TempDir(), "archetypes", "product.md"),
+			content: "+++\n+++\n",
+		},
+	} {
+		f, err := hugofs.SourceFs.Create(v.path)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+
+		_, err = f.Write([]byte(v.content))
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}