Merge pull request opencontainers#5 from wking/wrap-failing-test

test/failing: Wrap failing tests in another harness

util/tap/test/failing/main.go

@@ -1,10 +1,25 @@
 package main
 
-import "github.com/mndrix/tap-go"
+import (
+	"bytes"
+
+	"github.com/mndrix/tap-go"
+)
 
 func main() {
-	t := tap.New()
-	t.Header(2)
-	t.Ok(false, "first test")
-	t.Fail("second test")
+	t1 := tap.New()
+	t1.Header(2)
+
+	buf := new(bytes.Buffer)
+	t2 := tap.New()
+	t2.Writer = buf
+	t2.Header(2)
+
+	buf.Reset()
+	t2.Ok(false, "first test")
+	t1.Ok(buf.String() == "not ok 1 - first test\n", "Ok(false, ...) produces appropriate output")
+
+	buf.Reset()
+	t2.Fail("second test")
+	t1.Ok(buf.String() == "not ok 2 - second test\n", "Fail(...) produces appropriate output")
 }