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MDL-43882 dml: New test for perf_get_xxxx() methods

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David Monllao 2014-02-17 15:41:18 +08:00
parent ec4c8161a4
commit 3af7eea68d
1 changed files with 79 additions and 0 deletions
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79
lib/dml/tests/dml_test.php
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@ -5173,6 +5173,85 @@ class core_dml_testcase extends database_driver_testcase {
$DB->get_records_sql("SELECT * FROM {{$tablename}}", null, 1, -2);
$this->assertDebuggingCalled("Negative limitnum parameter detected: -2, did you pass the correct arguments?");
}
public function test_queries_counter() {
$DB = $this->tdb;
$dbman = $this->tdb->get_manager();
// Test database.
$table = $this->get_test_table();
$table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
$table->add_field('fieldvalue', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0');
$table->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));
$dbman->create_table($table);
$tablename = $table->getName();
// Initial counters values.
$initreads = $DB->perf_get_reads();
$initwrites = $DB->perf_get_writes();
$previousqueriestime = $DB->perf_get_queries_time();
// Selects counts as reads.
// The get_records_sql() method generates only 1 db query.
$whatever = $DB->get_records_sql("SELECT * FROM {{$tablename}}");
$this->assertEquals($initreads + 1, $DB->perf_get_reads());
// The get_records() method generates 2 queries the first time is called
// as it is fetching the table structure.
$whatever = $DB->get_records($tablename);
$this->assertEquals($initreads + 3, $DB->perf_get_reads());
$this->assertEquals($initwrites, $DB->perf_get_writes());
// The elapsed time is counted.
$lastqueriestime = $DB->perf_get_queries_time();
$this->assertGreaterThan($previousqueriestime, $lastqueriestime);
$previousqueriestime = $lastqueriestime;
// Only 1 now, it already fetched the table columns.
$whatever = $DB->get_records($tablename);
$this->assertEquals($initreads + 4, $DB->perf_get_reads());
// And only 1 more from now.
$whatever = $DB->get_records($tablename);
$this->assertEquals($initreads + 5, $DB->perf_get_reads());
// Inserts counts as writes.
$rec1 = new stdClass();
$rec1->fieldvalue = 11;
$rec1->id = $DB->insert_record($tablename, $rec1);
$this->assertEquals($initwrites + 1, $DB->perf_get_writes());
$this->assertEquals($initreads + 5, $DB->perf_get_reads());
// The elapsed time is counted.
$lastqueriestime = $DB->perf_get_queries_time();
$this->assertGreaterThan($previousqueriestime, $lastqueriestime);
$previousqueriestime = $lastqueriestime;
$rec2 = new stdClass();
$rec2->fieldvalue = 22;
$rec2->id = $DB->insert_record($tablename, $rec2);
$this->assertEquals($initwrites + 2, $DB->perf_get_writes());
// Updates counts as writes.
$rec1->fieldvalue = 111;
$DB->update_record($tablename, $rec1);
$this->assertEquals($initwrites + 3, $DB->perf_get_writes());
$this->assertEquals($initreads + 5, $DB->perf_get_reads());
// The elapsed time is counted.
$lastqueriestime = $DB->perf_get_queries_time();
$this->assertGreaterThan($previousqueriestime, $lastqueriestime);
$previousqueriestime = $lastqueriestime;
// Sum of them.
$totaldbqueries = $DB->perf_get_reads() + $DB->perf_get_writes();
$this->assertEquals($totaldbqueries, $DB->perf_get_queries());
}
}
/**