Put auth tests together

Followup to #171 (comment)

This puts the caching_sha2 and native plugin tests together with the
cleartext ones.

contrib/ruby/test/auth_test.rb

@@ -1,6 +1,87 @@
 require "test_helper"
 
 class AuthTest < TrilogyTest
+  def has_caching_sha2?
+    server_version = new_tcp_client.server_version
+    server_version.split(".", 2)[0].to_i >= 8
+  end
+
+  def test_connect_native_password
+    client = new_tcp_client username: "native"
+
+    refute_nil client
+  ensure
+    ensure_closed client
+  end
+
+  def test_connect_caching_sha2
+    return skip unless has_caching_sha2?
+
+    # Ensure correct setup
+    assert_equal [["caching_sha2_password"]], new_tcp_client.query("SELECT plugin FROM mysql.user WHERE user = 'caching_sha2'").rows
+
+    client = new_tcp_client username: "caching_sha2", password: "password"
+
+    refute_nil client
+  ensure
+    ensure_closed client
+  end
+
+  def test_connect_with_unix_and_caching_sha2_works
+    return skip unless has_caching_sha2?
+    return skip unless ["127.0.0.1", "localhost"].include?(DEFAULT_HOST)
+
+    socket = new_tcp_client.query("SHOW VARIABLES LIKE 'socket'").to_a[0][1]
+
+    if !File.exist?(socket)
+      skip "cound not find socket at #{socket}"
+    end
+
+    client = new_unix_client(socket, username: "caching_sha2", password: "password")
+    refute_nil client
+  ensure
+    ensure_closed client
+  end
+
+  def test_connect_without_ssl_or_unix_socket_caching_sha2_raises
+    return skip unless has_caching_sha2?
+
+    # Ensure correct setup
+    assert_equal [["caching_sha2_password"]], new_tcp_client.query("SELECT plugin FROM mysql.user WHERE user = 'caching_sha2'").rows
+
+    options = {
+      host: DEFAULT_HOST,
+      port: DEFAULT_PORT,
+      username: "caching_sha2",
+      password: "password",
+      ssl: false,
+      ssl_mode: 0
+    }
+
+    err = assert_raises Trilogy::ConnectionError do
+      new_tcp_client options
+    end
+
+    assert_includes err.message, "TRILOGY_UNSUPPORTED"
+    assert_includes err.message, "caching_sha2_password requires either TCP with TLS or a unix socket"
+  end
+
+  def test_connection_error_native
+    err = assert_raises Trilogy::ConnectionError do
+      new_tcp_client(username: "native", password: "incorrect")
+    end
+    assert_includes err.message, "Access denied for user 'native"
+  end
+
+  def test_connection_error_caching_sha2
+    return skip unless has_caching_sha2?
+
+    err = assert_raises Trilogy::ConnectionError do
+      new_tcp_client(username: "caching_sha2", password: "incorrect")
+    end
+    assert_includes err.message, "Access denied for user 'caching_sha2"
+  end
+
   def test_cleartext_auth_plugin
     client = new_tcp_client username: "cleartext_user", password: "password", enable_cleartext_plugin: true
     refute_nil client

contrib/ruby/test/client_test.rb

@@ -23,87 +23,6 @@ def test_trilogy_connect_tcp_string_host
     end
   end
 
-  def has_caching_sha2?
-    server_version = new_tcp_client.server_version
-    server_version.split(".", 2)[0].to_i >= 8
-  end
-
-  def test_connect_native_password
-    client = new_tcp_client username: "native"
-
-    refute_nil client
-  ensure
-    ensure_closed client
-  end
-
-  def test_connect_caching_sha2
-    return skip unless has_caching_sha2?
-
-    # Ensure correct setup
-    assert_equal [["caching_sha2_password"]], new_tcp_client.query("SELECT plugin FROM mysql.user WHERE user = 'caching_sha2'").rows
-
-    client = new_tcp_client username: "caching_sha2", password: "password"
-
-    refute_nil client
-  ensure
-    ensure_closed client
-  end
-
-  def test_connect_with_unix_and_caching_sha2_works
-    return skip unless has_caching_sha2?
-    return skip unless ["127.0.0.1", "localhost"].include?(DEFAULT_HOST)
-
-    socket = new_tcp_client.query("SHOW VARIABLES LIKE 'socket'").to_a[0][1]
-
-    if !File.exist?(socket)
-      skip "cound not find socket at #{socket}"
-    end
-
-    client = new_unix_client(socket, username: "caching_sha2", password: "password")
-    refute_nil client
-  ensure
-    ensure_closed client
-  end
-
-  def test_connect_without_ssl_or_unix_socket_caching_sha2_raises
-    return skip unless has_caching_sha2?
-
-    # Ensure correct setup
-    assert_equal [["caching_sha2_password"]], new_tcp_client.query("SELECT plugin FROM mysql.user WHERE user = 'caching_sha2'").rows
-
-    options = {
-      host: DEFAULT_HOST,
-      port: DEFAULT_PORT,
-      username: "caching_sha2",
-      password: "password",
-      ssl: false,
-      ssl_mode: 0
-    }
-
-    err = assert_raises Trilogy::ConnectionError do
-      new_tcp_client options
-    end
-
-    assert_includes err.message, "TRILOGY_UNSUPPORTED"
-    assert_includes err.message, "caching_sha2_password requires either TCP with TLS or a unix socket"
-  end
-
-  def test_connection_error_native
-    err = assert_raises Trilogy::ConnectionError do
-      new_tcp_client(username: "native", password: "incorrect")
-    end
-    assert_includes err.message, "Access denied for user 'native"
-  end
-
-  def test_connection_error_caching_sha2
-    return skip unless has_caching_sha2?
-
-    err = assert_raises Trilogy::ConnectionError do
-      new_tcp_client(username: "caching_sha2", password: "incorrect")
-    end
-    assert_includes err.message, "Access denied for user 'caching_sha2"
-  end
-
   def test_trilogy_connect_tcp_to_wrong_port
     e = assert_raises Trilogy::ConnectionError do
       new_tcp_client port: 13307