chore: import upstream snapshot with attribution

testing/postgres-client-tests/ruby/activerecord-test.rb

@@ -0,0 +1,52 @@
+#!/usr/bin/ruby
+
+require 'active_record'
+
+user = ARGV[0]
+port = ARGV[1].to_i
+
+ActiveRecord::Base.establish_connection(
+  adapter: 'postgresql',
+  host: 'localhost',
+  port: port,
+  database: 'postgres',
+  username: user,
+  password: 'password'
+)
+ActiveRecord::Base.logger = nil
+
+conn = ActiveRecord::Base.connection
+
+# SELECT pk from test_table (set up by bats setup())
+pk = conn.execute("SELECT pk FROM test_table LIMIT 1").first["pk"].to_i
+raise "expected pk=1, got #{pk}" unless pk == 1
+
+# INSERT
+conn.execute("INSERT INTO test_table VALUES (2)")
+
+# COUNT
+count = conn.execute("SELECT COUNT(*) FROM test_table").first["count"].to_i
+raise "expected count=2, got #{count}" unless count == 2
+
+# Dolt workflow
+[
+  "DROP TABLE IF EXISTS test",
+  "CREATE TABLE test (pk int, value int, PRIMARY KEY(pk))",
+  "INSERT INTO test (pk, value) VALUES (0, 0)",
+  "SELECT dolt_add('-A')",
+  "SELECT dolt_commit('-m', 'added table test')",
+  "SELECT dolt_checkout('-b', 'mybranch')",
+  "INSERT INTO test VALUES (1, 1)",
+  "SELECT dolt_commit('-a', '-m', 'updated test')",
+  "SELECT dolt_checkout('main')",
+  "SELECT dolt_merge('mybranch')",
+].each { |sql| conn.execute(sql) }
+
+log_count = conn.execute("SELECT COUNT(*) FROM dolt_log").first["count"].to_i
+raise "expected 4 dolt_log entries, got #{log_count}" unless log_count == 4
+
+test_count = conn.execute("SELECT COUNT(*) FROM test").first["count"].to_i
+raise "expected 2 rows in test, got #{test_count}" unless test_count == 2
+
+ActiveRecord::Base.connection_pool.disconnect!
+puts "ActiveRecord test passed"