hugolib: Finish menu vs section content pages

This commit also fixes the default menu sort when the weight is 0.

Closes #2974

hugolib/testhelpers_test.go

@@ -6,12 +6,13 @@ import (
 
 	"regexp"
 
-	"github.com/spf13/hugo/config"
-	"github.com/spf13/hugo/deps"
-
 	"fmt"
 	"strings"
 
+	"github.com/spf13/afero"
+	"github.com/spf13/hugo/config"
+	"github.com/spf13/hugo/deps"
+
 	"github.com/spf13/hugo/helpers"
 	"github.com/spf13/hugo/source"
 	"github.com/spf13/hugo/tpl"
@@ -113,6 +114,39 @@ func newTestSite(t testing.TB, configKeyValues ...interface{}) *Site {
 	return s
 }
 
+func newTestSitesFromConfig(t testing.TB, tomlConfig string, layoutPathContentPairs ...string) (testHelper, *HugoSites) {
+	if len(layoutPathContentPairs)%2 != 0 {
+		t.Fatalf("Layouts must be provided in pairs")
+	}
+	mf := afero.NewMemMapFs()
+
+	writeToFs(t, mf, "config.toml", tomlConfig)
+
+	cfg, err := LoadConfig(mf, "", "config.toml")
+	require.NoError(t, err)
+
+	fs := hugofs.NewFrom(mf, cfg)
+	th := testHelper{cfg, fs, t}
+
+	for i := 0; i < len(layoutPathContentPairs); i += 2 {
+		writeSource(t, fs, layoutPathContentPairs[i], layoutPathContentPairs[i+1])
+	}
+
+	h, err := NewHugoSites(deps.DepsCfg{Fs: fs, Cfg: cfg})
+
+	require.NoError(t, err)
+
+	return th, h
+}
+
+func newTestSitesFromConfigWithDefaultTemplates(t testing.TB, tomlConfig string) (testHelper, *HugoSites) {
+	return newTestSitesFromConfig(t, tomlConfig,
+		"layouts/_default/single.html", "Single|{{ .Title }}|{{ .Content }}",
+		"layouts/_default/list.html", "List|{{ .Title }}|{{ .Content }}",
+		"layouts/_default/terms.html", "Terms List|{{ .Title }}|{{ .Content }}",
+	)
+}
+
 func newDebugLogger() *jww.Notepad {
 	return jww.NewNotepad(jww.LevelDebug, jww.LevelError, os.Stdout, ioutil.Discard, "", log.Ldate|log.Ltime)
 }