add markdown_test.go

markdown_test.go

@@ -0,0 +1,73 @@
+package markdown
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// for each pair of .text/.html files in the given subdirectory
+// of `./tests' compare the expected html output with
+// the output of Parser.Markdown.
+func runDirTests(dir string, t *testing.T) {
+
+	dirPath := filepath.Join("tests", dir)
+	f, err := os.Open(dirPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	names, err := f.Readdirnames(-1)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := NewParser(nil)
+	for _, name := range names {
+		if filepath.Ext(name) != ".text" {
+			continue
+		}
+		if err = compareOutput(filepath.Join(dirPath, name), p); err != nil {
+			t.Error(err)
+		}
+	}
+}
+
+// Compare the output of the C-based peg-markdown, which
+// is, for each test, available in a .html file accompanying the
+// .text file, with the output of this package's Markdown processor.
+func compareOutput(textPath string, p *Parser) (err error) {
+	var bOrig, bThis bytes.Buffer
+
+	r, err := os.Open(textPath)
+	if err != nil {
+		return
+	}
+	defer r.Close()
+
+	bThis.Reset()
+	out := ToHTML(&bThis)
+	p.Markdown(r, out)
+
+	// replace .text extension by .html
+	base := textPath[:len(textPath)-len(".text")]
+	htmlPath := base + ".html"
+
+	r, err = os.Open(htmlPath)
+	if err != nil {
+		return
+	}
+	defer r.Close()
+	bOrig.ReadFrom(r)
+	if bytes.Compare(bOrig.Bytes(), bThis.Bytes()) != 0 {
+		err = fmt.Errorf("test %q failed", base)
+	}
+	return
+}
+
+func TestMarkdown103(t *testing.T) {
+	runDirTests("md1.0.3", t)
+}