common: DNSResolver can handle hostnames without dot characters

Unrelated, but similar code-wise to #8643. There is a check in `DNSResolver` which automatically fails to resolve hostnames which do not contain the `.` character. This PR removes that check.

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/unit_tests/dns_resolver.cpp b/tests/unit_tests/dns_resolver.cpp
index a6b733592..d56cbe45b 100644
--- a/tests/unit_tests/dns_resolver.cpp
+++ b/tests/unit_tests/dns_resolver.cpp
@@ -158,6 +158,17 @@ TEST(DNSResolver, GetTXTRecord)
   EXPECT_STREQ("donate.getmonero.org", addr.c_str());
 }
 
+TEST(DNSResolver, Localhost)
+{
+  tools::DNSResolver resolver = tools::DNSResolver::create();
+
+  bool avail, valid;
+  std::vector<std::string> ips = resolver.get_ipv4("localhost", avail, valid);
+
+  ASSERT_EQ(1, ips.size());
+  ASSERT_EQ("127.0.0.1", ips[0]);
+}
+
 bool is_equal(const char *s, const std::vector<std::string> &v) { return v.size() == 1 && v[0] == s; }
 
 TEST(DNS_PUBLIC, empty) { EXPECT_TRUE(tools::dns_utils::parse_dns_public("").empty()); }