public void TestToString()
{
var d = new LabelDict("foo");
Assert.That(d.ToString(null), Is.EqualTo("environment=\"foo\""));
Assert.That(d.ToString(""), Is.EqualTo("environment=\"foo\""));
Assert.That(d.ToString("123"), Is.EqualTo("environment=\"foo\",le=\"123\""));
d = new LabelDict("foo\nbar");
Assert.That(d.ToString(null), Is.EqualTo("environment=\"foo\\nbar\""));
d = new LabelDict("foo\"bar");
Assert.That(d.ToString(null), Is.EqualTo("environment=\"foo\\\"bar\""));
d = new LabelDict("foo\\bar");
Assert.That(d.ToString(null), Is.EqualTo("environment=\"foo\\\\bar\""));
d = new LabelDict("foo");
d.Set("a", "b");
Assert.That(d.ToString(null), Is.EqualTo("environment=\"foo\",a=\"b\""));
}
protected string QualifiedName([CanBeNull] string le = null)
{
return($"{_metricBase.PrefixedName}{{{Labels.ToString(le)}}}");
}