[client] add tests for account TURN helpers

Author: WINGS-N

client/vk_account_token_test.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+)
+
+// TestTurnUsernameLifetime checks the "expiryUnix:userId" TURN REST username is
+// turned into a remaining lifetime with a safety margin, a 1-minute floor for
+// already-expired creds, and a default for unparsable input.
+func TestTurnUsernameLifetime(t *testing.T) {
+	future := fmt.Sprintf("%d:601279409979", time.Now().Add(2*time.Hour).Unix())
+	if d := turnUsernameLifetime(future); d <= time.Hour {
+		t.Fatalf("future lifetime = %s, want > 1h", d)
+	}
+	past := fmt.Sprintf("%d:1", time.Now().Add(-time.Hour).Unix())
+	if d := turnUsernameLifetime(past); d != time.Minute {
+		t.Fatalf("past lifetime = %s, want 1m", d)
+	}
+	if d := turnUsernameLifetime("not-a-number:1"); d != 8*time.Minute {
+		t.Fatalf("garbage lifetime = %s, want 8m", d)
+	}
+}
+
+// TestVkHashFromLink checks the call join hash is extracted from full URLs (with
+// query/fragment/trailing slash stripped) and passed through unchanged when it is
+// already a bare hash.
+func TestVkHashFromLink(t *testing.T) {
+	cases := map[string]string{
+		"https://vk.com/call/join/ABC123":      "ABC123",
+		"https://vk.com/call/join/ABC123?p=1":  "ABC123",
+		"https://vk.com/call/join/ABC123#frag": "ABC123",
+		"  https://vk.com/call/join/ABC123/  ": "ABC123",
+		"ABC123":                               "ABC123",
+	}
+	for in, want := range cases {
+		if got := vkHashFromLink(in); got != want {
+			t.Errorf("vkHashFromLink(%q) = %q, want %q", in, got, want)
+		}
+	}
+}
+
+// TestRandomDeviceIDFormat checks the OK SDK device id is a v4-shaped UUID.
+func TestRandomDeviceIDFormat(t *testing.T) {
+	id := randomDeviceID()
+	if len(id) != 36 {
+		t.Fatalf("device id len = %d, want 36 (%q)", len(id), id)
+	}
+	parts := strings.Split(id, "-")
+	if len(parts) != 5 || parts[2][0] != '4' {
+		t.Fatalf("device id not uuid-v4 shaped: %q", id)
+	}
+}