Fix Dynu DNS record updates to use POST endpoint

internal/dynuclient/client.go

@@ -216,7 +216,7 @@ func (c *Client) CreateDNSRecord(ctx context.Context, domainID int64, req Create
 
 func (c *Client) UpdateDNSRecord(ctx context.Context, domainID int64, recordID int64, req UpdateDNSRecordRequest) (*DNSRecord, error) {
 	var resp getDNSRecordResponse
-	if err := c.doRequest(ctx, http.MethodPut, fmt.Sprintf("/dns/%d/record/%d", domainID, recordID), buildDNSRecordUpsertPayload(req.RecordType, req.NodeName, req.Content, req.TTL, req.State, req.Group, req.Host), &resp); err != nil {
+	if err := c.doRequest(ctx, http.MethodPost, fmt.Sprintf("/dns/%d/record/%d", domainID, recordID), buildDNSRecordUpsertPayload(req.RecordType, req.NodeName, req.Content, req.TTL, req.State, req.Group, req.Host), &resp); err != nil {
 		return nil, err
 	}
 	normalizeDNSRecord(&resp.DNSRecord)

internal/dynuclient/client_test.go

@@ -200,7 +200,7 @@ func TestClientCreateDNSRecordSendsIPv4AddressForARecord(t *testing.T) {
 func TestClientUpdateDNSRecordSendsIPv6AddressForAAAARecord(t *testing.T) {
 	var captured map[string]any
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodPut || r.URL.Path != "/dns/1001/record/2002" {
+		if r.Method != http.MethodPost || r.URL.Path != "/dns/1001/record/2002" {
 			t.Fatalf("unexpected request %s %s", r.Method, r.URL.Path)
 		}
 		if err := json.NewDecoder(r.Body).Decode(&captured); err != nil {

internal/provider/resource_dns_record_integration_test.go

@@ -195,7 +195,7 @@ func TestIntegrationResourceDNSRecordDynamicAStateStableAndTransitionToStatic(t
 	}
 
 	updatePlan := state
-	updatePlan.Content = types.StringValue("192.0.2.42")
+	updatePlan.Content = types.StringValue("1.1.1.1")
 	updatePlan.Dynamic = types.BoolValue(false)
 
 	plan = tfsdk.Plan{Schema: schemaResp.Schema}
@@ -214,7 +214,7 @@ func TestIntegrationResourceDNSRecordDynamicAStateStableAndTransitionToStatic(t
 	if state.Dynamic.ValueBool() {
 		t.Fatalf("expected static A after setting content")
 	}
-	if state.Content.ValueString() != "192.0.2.42" {
+	if state.Content.ValueString() != "1.1.1.1" {
 		t.Fatalf("expected static content after update, got %q", state.Content.ValueString())
 	}
 }

internal/provider/resource_dns_record_test.go

@@ -26,8 +26,8 @@ func TestParseDNSRecordIDInvalid(t *testing.T) {
 }
 
 func TestValidateDNSRecordContentForType(t *testing.T) {
-	ipv4 := "192.0.2.123"
+	ipv4 := "8.8.8.8"
-	ipv6 := "2001:db8::123"
+	ipv6 := "2606:4700:4700::1111"
 	nonEmpty := "hello"
 	blank := ""
 
@@ -75,7 +75,7 @@ func TestResolveDynamicIntent(t *testing.T) {
 	}
 
 	diags = diag.Diagnostics{}
-	dynamic, ok = resolveDynamicIntent("A", types.StringValue("192.0.2.10"), types.BoolNull(), &diags)
+	dynamic, ok = resolveDynamicIntent("A", types.StringValue("8.8.4.4"), types.BoolNull(), &diags)
 	if !ok || dynamic || diags.HasError() {
 		t.Fatalf("expected static A content to resolve to dynamic=false, got dynamic=%v ok=%v diags=%v", dynamic, ok, diags)
 	}

internal/testutil/fakedynu/server.go

@@ -241,7 +241,7 @@ func (s *Server) serveRecordRoutes(w http.ResponseWriter, r *http.Request, segme
 		case http.MethodGet:
 			s.handleGetRecord(w, domainID, recordID)
 			return
-		case http.MethodPut:
+		case http.MethodPut, http.MethodPost:
 			s.handleUpdateRecord(w, r, domainID, recordID)
 			return
 		case http.MethodDelete: