Expose ICE candidates ToICE() method

Expose ToICE() method on ICE candidates to allow for easier conversion
to ice package ICE candidates.

Resolve https://github.com/pion/webrtc/issues/3069

icecandidate.go

@@ -80,7 +80,8 @@ func newICECandidateFromICE(candidate ice.Candidate, sdpMid string, sdpMLineInde
 	return newCandidate, nil
 }
 
-func (c ICECandidate) toICE() (cand ice.Candidate, err error) {
+// ToICE converts ICECandidate to ice.Candidate.
+func (c ICECandidate) ToICE() (cand ice.Candidate, err error) {
 	candidateID := c.statsID
 	switch c.Typ {
 	case ICECandidateTypeHost:
@@ -216,7 +217,7 @@ func convertTypeFromICE(t ice.CandidateType) (ICECandidateType, error) {
 }
 
 func (c ICECandidate) String() string {
-	ic, err := c.toICE()
+	ic, err := c.ToICE()
 	if err != nil {
 		return fmt.Sprintf("%#v failed to convert to ICE: %s", c, err)
 	}
@@ -229,7 +230,7 @@ func (c ICECandidate) String() string {
 func (c ICECandidate) ToJSON() ICECandidateInit {
 	candidateStr := ""
 
-	candidate, err := c.toICE()
+	candidate, err := c.ToICE()
 	if err == nil {
 		candidateStr = candidate.Marshal()
 	}

icecandidate_test.go

@@ -130,7 +130,7 @@ func TestICECandidate_Convert(t *testing.T) {
 
 		// first copy the candidate ID so it matches the new one
 		testCase.native.statsID = expectedICE.ID()
-		actualICE, err := testCase.native.toICE()
+		actualICE, err := testCase.native.ToICE()
 		assert.NoError(t, err)
 
 		assert.Equal(t, expectedICE, actualICE, "testCase: %d ice not equal %v", i, actualICE)
@@ -239,6 +239,30 @@ func TestICECandidateZeroSDPid(t *testing.T) {
 	assert.Equal(t, candidate.SDPMLineIndex, uint16(0))
 }
 
+func TestICECandidateString(t *testing.T) {
+	candidate := ICECandidate{
+		Foundation: "foundation",
+		Priority:   128,
+		Address:    "1.0.0.1",
+		Protocol:   ICEProtocolUDP,
+		Port:       1234,
+		Typ:        ICECandidateTypeHost,
+		Component:  1,
+	}
+	iceCandidateConfig := ice.CandidateHostConfig{
+		Network:    "udp",
+		Address:    "1.0.0.1",
+		Port:       1234,
+		Component:  1,
+		Foundation: "foundation",
+		Priority:   128,
+	}
+	iceCandidate, err := ice.NewCandidateHost(&iceCandidateConfig)
+	assert.NoError(t, err)
+
+	assert.Equal(t, candidate.String(), iceCandidate.String())
+}
+
 func TestICECandidateSDPMid_ToJSON(t *testing.T) {
 	candidate := ICECandidate{}
 
@@ -348,7 +372,7 @@ func TestICECandidateExtensions_ToJSON(t *testing.T) {
 		assert.Equal(t, sdpMLineIndex, *candidateInit.SDPMLineIndex)
 		assert.Equal(t, "candidate:"+cand.candidate, candidateInit.Candidate)
 
-		iceBack, err := iceCandidate.toICE()
+		iceBack, err := iceCandidate.ToICE()
 
 		assert.NoError(t, err)
 		assert.Equal(t, cand.extensions, iceBack.Extensions())

icetransport.go

@@ -298,7 +298,7 @@ func (t *ICETransport) SetRemoteCandidates(remoteCandidates []ICECandidate) erro
 	}
 
 	for _, c := range remoteCandidates {
-		i, err := c.toICE()
+		i, err := c.ToICE()
 		if err != nil {
 			return err
 		}
@@ -326,7 +326,7 @@ func (t *ICETransport) AddRemoteCandidate(remoteCandidate *ICECandidate) error {
 	}
 
 	if remoteCandidate != nil {
-		if candidate, err = remoteCandidate.toICE(); err != nil {
+		if candidate, err = remoteCandidate.ToICE(); err != nil {
 			return err
 		}
 	}

sdp.go

@@ -302,7 +302,7 @@ func addCandidatesToMediaDescriptions(
 	}
 
 	for _, c := range candidates {
-		candidate, err := c.toICE()
+		candidate, err := c.ToICE()
 		if err != nil {
 			return err
 		}