Adding ability to read from io.Reader

This allows for testing without relying on the file system.  Parsing algorithm to not read the entire file into memory.

hugolib/page_test.go

@@ -0,0 +1,124 @@
+package hugolib
+
+import (
+	"html/template"
+	"io"
+	"strings"
+	"testing"
+)
+
+var EMPTY_PAGE = ""
+
+var SIMPLE_PAGE = `---
+title: Simple
+---
+Simple Page
+`
+
+var INVALID_FRONT_MATTER_MISSING = `This is a test`
+
+var INVALID_FRONT_MATTER_SHORT_DELIM = `
+--
+title: Short delim start
+---
+Short Delim
+`
+
+var INVALID_FRONT_MATTER_SHORT_DELIM_ENDING = `
+---
+title: Short delim ending
+--
+Short Delim
+`
+
+var INVALID_FRONT_MATTER_LEADING_WS = `
+ 
+ ---
+title: Leading WS
+---
+Leading
+`
+
+func checkError(t *testing.T, err error, expected string) {
+	if err == nil {
+		t.Fatalf("err is nil")
+	}
+	if err.Error() != expected {
+		t.Errorf("err.Error() returned: '%s'.  Expected: '%s'", err.Error(), expected)
+	}
+}
+
+func TestDegenerateEmptyPageZeroLengthName(t *testing.T) {
+	_, err := ReadFrom(strings.NewReader(EMPTY_PAGE), "")
+	if err == nil {
+		t.Fatalf("A zero length page name must return an error")
+	}
+
+	checkError(t, err, "Zero length page name")
+}
+
+func TestDegenerateEmptyPage(t *testing.T) {
+	_, err := ReadFrom(strings.NewReader(EMPTY_PAGE), "test")
+	if err == nil {
+		t.Fatalf("Expected ReadFrom to return an error when an empty buffer is passed.")
+	}
+
+	checkError(t, err, "unable to locate front matter")
+}
+
+func checkPageTitle(t *testing.T, page *Page, title string) {
+	if page.Title != title {
+		t.Fatalf("Page title is: %s.  Expected %s", page.Title, title)
+	}
+}
+
+func checkPageContent(t *testing.T, page *Page, content string) {
+	if page.Content != template.HTML(content) {
+		t.Fatalf("Page content is: %s.  Expected %s", page.Content, content)
+	}
+}
+
+func checkPageType(t *testing.T, page *Page, pageType string) {
+	if page.Type() != pageType {
+		t.Fatalf("Page type is: %s.  Expected: %s", page.Type(), pageType)
+	}
+}
+
+func checkPageLayout(t *testing.T, page *Page, layout string) {
+	if page.Layout() != layout {
+		t.Fatalf("Page layout is: %s.  Expected: %s", page.Layout(), layout)
+	}
+}
+
+func TestCreateNewPage(t *testing.T) {
+	p, err := ReadFrom(strings.NewReader(SIMPLE_PAGE), "simple")
+	if err != nil {
+		t.Fatalf("Unable to create a page with frontmatter and body content: %s", err)
+	}
+	checkPageTitle(t, p, "Simple")
+	checkPageContent(t, p, "<p>Simple Page</p>\n")
+	checkPageType(t, p, "page")
+	checkPageLayout(t, p, "page/single.html")
+}
+
+func TestDegenerateInvalidFrontMatterShortDelim(t *testing.T) {
+	var tests = []struct {
+		r   io.Reader
+		err string
+	}{
+		{strings.NewReader(INVALID_FRONT_MATTER_SHORT_DELIM), "unable to match beginning front matter delimiter"},
+		{strings.NewReader(INVALID_FRONT_MATTER_SHORT_DELIM_ENDING), "unable to match ending front matter delimiter"},
+		{strings.NewReader(INVALID_FRONT_MATTER_MISSING), "unable to match beginning front matter delimiter"},
+	}
+	for _, test := range tests {
+		_, err := ReadFrom(test.r, "invalid/front/matter/short/delim")
+		checkError(t, err, test.err)
+	}
+}
+
+func TestDegenerateInvalidFrontMatterLeadingWhitespace(t *testing.T) {
+	_, err := ReadFrom(strings.NewReader(INVALID_FRONT_MATTER_LEADING_WS), "invalid/front/matter/leading/ws")
+	if err != nil {
+		t.Fatalf("Unable to parse front matter given leading whitespace: %s", err)
+	}
+}