add tests for base database concern

test/lib/concerns/base_database_test.rb

@@ -0,0 +1,163 @@
+require 'test_helper'
+
+class FakeDatabase
+  include ForemanMaintain::Concerns::BaseDatabase
+  include ForemanMaintain::Concerns::SystemHelpers
+
+  attr_reader :configuration
+
+  def initialize(config)
+    @configuration = config
+  end
+end
+
+module ForemanMaintain
+  describe Concerns::BaseDatabase do
+    describe 'with local db' do
+      let(:db) { FakeDatabase.new(config) }
+      let(:config) do
+        {
+          'host' => 'localhost',
+          'database' => 'fakedb',
+          'username' => 'fakeuser',
+          'password' => 'fakepassword',
+        }
+      end
+      let(:expected_env) do
+        {
+          'PGHOST' => 'localhost',
+          'PGPORT' => nil,
+          'PGDATABASE' => 'fakedb',
+          'PGUSER' => 'fakeuser',
+          'PGPASSWORD' => 'fakepassword',
+        }
+      end
+
+      it 'accepts localhost as local' do
+        assert db.local?
+      end
+
+      it 'fetches server version' do
+        db.expects(:ping!)
+        db.expects(:execute!).with(
+          'psql --tuples-only --no-align',
+          stdin: 'SHOW server_version',
+          env: expected_env
+        ).returns('13.16')
+
+        assert db.db_version
+      end
+
+      it 'drops db' do
+        db.expects(:execute!).with("runuser - postgres -c 'dropdb fakedb'").returns('')
+
+        assert db.dropdb
+      end
+
+      it 'restores db' do
+        file = '/backup/fake.dump'
+
+        db.expects(:execute!).with("runuser - postgres -c 'pg_restore -C -d postgres #{file}'").
+          returns('')
+
+        assert db.restore_dump(file, true)
+      end
+
+      it 'dumps db' do
+        file = '/backup/fake.dump'
+
+        db.expects(:execute!).with(
+          "pg_dump -Fc -f /backup/fake.dump",
+          env: expected_env
+        ).returns('')
+
+        assert db.dump_db(file)
+      end
+
+      it 'pings db' do
+        db.expects(:execute?).with("psql",
+          stdin: "SELECT 1 as ping", env: expected_env).returns(true)
+
+        assert db.ping
+      end
+
+      it 'runs db queries' do
+        psql_return = <<~PSQL
+           test
+          ------
+             42
+          (1 row)
+        PSQL
+
+        db.expects(:ping!)
+        db.expects(:execute).with("psql",
+          stdin: "SELECT 42 as test", env: expected_env).returns(psql_return)
+
+        assert db.psql('SELECT 42 as test')
+      end
+    end
+
+    describe 'with remote db' do
+      let(:db) { FakeDatabase.new(config) }
+      let(:config) do
+        {
+          'host' => 'db.example.com',
+          'database' => 'fakedb',
+          'username' => 'fakeuser',
+          'password' => 'fakepassword',
+        }
+      end
+      let(:expected_env) do
+        {
+          'PGHOST' => 'db.example.com',
+          'PGPORT' => nil,
+          'PGDATABASE' => 'fakedb',
+          'PGUSER' => 'fakeuser',
+          'PGPASSWORD' => 'fakepassword',
+        }
+      end
+
+      it 'accepts db.example.com as remote' do
+        refute db.local?
+      end
+
+      it 'drops db' do
+        select_statement = <<~SQL
+          select string_agg('drop table if exists \"' || tablename || '\" cascade;', '')
+          from pg_tables
+          where schemaname = 'public';
+        SQL
+        delete_statement = 'drop table if exists \"faketable\"'
+        db.expects(:psql).with(select_statement).returns(delete_statement)
+        db.expects(:psql).with(delete_statement).returns('')
+        assert db.dropdb
+      end
+
+      it 'restores db' do
+        file = '/backup/fake.dump'
+        restore_cmd = <<~CMD.strip
+          pg_restore --no-privileges --clean --disable-triggers -n public -d fakedb #{file}
+        CMD
+
+        db.expects(:execute!).with(
+          restore_cmd,
+          valid_exit_statuses: [0, 1],
+          env: expected_env
+        ).returns('')
+
+        assert db.restore_dump(file, false)
+      end
+
+      it 'dumps remote db' do
+        file = '/backup/fake.dump'
+
+        db.expects(:execute!).with(
+          "pg_dump -Fc -f /backup/fake.dump",
+          env: expected_env
+        ).returns('')
+
+        assert db.dump_db(file)
+      end
+    end
+  end
+end