go-ipfs-config: Merge pull request ipfs#37 from ipfs/fix/formatting-bootstrappers

fix string formatting of bootstrap peers

Author: Stebalien

config/bootstrap_peers.go

@@ -73,9 +73,16 @@ func ParseBootstrapPeers(addrs []string) ([]peer.AddrInfo, error) {
 // BootstrapPeerStrings formats a list of AddrInfos as a bootstrap peer list
 // suitable for serialization.
 func BootstrapPeerStrings(bps []peer.AddrInfo) []string {
-	bpss := make([]string, len(bps))
-	for i, p := range bps {
-		bpss[i] = p.String()
+	bpss := make([]string, 0, len(bps))
+	for _, pi := range bps {
+		addrs, err := peer.AddrInfoToP2pAddrs(&pi)
+		if err != nil {
+			// programmer error.
+			panic(err)
+		}
+		for _, addr := range addrs {
+			bpss = append(bpss, addr.String())
+		}
 	}
 	return bpss
 }

config/bootstrap_peers_test.go

@@ -0,0 +1,24 @@
+package config
+
+import (
+	"sort"
+	"testing"
+)
+
+func TestBoostrapPeerStrings(t *testing.T) {
+	parsed, err := ParseBootstrapPeers(DefaultBootstrapAddresses)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	formatted := BootstrapPeerStrings(parsed)
+	sort.Strings(formatted)
+	expected := append([]string{}, DefaultBootstrapAddresses...)
+	sort.Strings(expected)
+
+	for i, s := range formatted {
+		if expected[i] != s {
+			t.Fatalf("expected %s, %s", expected[i], s)
+		}
+	}
+}