An unit test for the schema API.

From: Damien Tournoud <damien@tournoud.net>


---

 modules/simpletest/tests/schema.test |   99 ++++++++++++++++++++++++++++++++++
 1 files changed, 99 insertions(+), 0 deletions(-)
 create mode 100644 modules/simpletest/tests/schema.test


diff --git modules/simpletest/tests/schema.test modules/simpletest/tests/schema.test
new file mode 100644
index 0000000..f32fab3
--- /dev/null
+++ modules/simpletest/tests/schema.test
@@ -0,0 +1,99 @@
+<?php
+// $Id$
+
+/**
+ * @file
+ * Tests for the Database Schema API.
+ */
+
+/**
+ * Unit tests for the Schema API.
+ */
+class SchemaTestCase extends DrupalWebTestCase {
+  function getInfo() {
+    return array(
+      'name' => t('Schema API'),
+      'description' => t('Tests table creation and modification via the schema API.'),
+      'group' => t('Database'),
+    );
+  }
+
+  /**
+   * 
+   */
+  function testSchema() {
+    // Try creating a table.
+    $table_specification = array(
+      'fields' => array(
+        'id'  => array(
+          'type' => 'int',
+          'default' => NULL,
+        ),
+        'test_field'  => array(
+          'type' => 'int',
+          'not null' => TRUE,
+        ),
+      ),
+    );
+    $ret = array();
+    db_create_table($ret, 'test_table', $table_specification);
+
+    // Assert that the table exists.
+    $this->assertTrue(db_table_exists('test_table'), t('The table exists.'));
+
+    // An insert without a value for the column 'test_table' should fail.
+    $this->assertFalse($this->tryInsert(), t('Insert without a default failed.'));
+
+    // Add a default value to the column.
+    db_field_set_default($ret, 'test_table', 'test_field', 0);
+    // The insert should now succeed.
+    $this->assertTrue($this->tryInsert(), t('Insert with a default succeeded.'));
+
+    // Remove the default.
+    db_field_set_no_default($ret, 'test_table', 'test_field');
+    // The insert should fail again.
+    $this->assertFalse($this->tryInsert(), t('Insert without a default failed.'));
+
+    // Rename the table.
+    db_rename_table($ret, 'test_table', 'test_table2');
+    // We need the default so that we can insert after the rename.
+    db_field_set_default($ret, 'test_table2', 'test_field', 0);
+    $this->assertFalse($this->tryInsert(), t('Insert into the old table failed.'));
+    $this->assertTrue($this->tryInsert('test_table2'), t('Insert into the new table succeeded.'));
+
+    // We should have successfully inserted exactly two rows.
+    $count = db_query('SELECT COUNT(*) FROM {test_table2}')->fetchField();
+    $this->assertEqual($count, 2, t('Two fields were successfully inserted.'));
+
+    // Try to drop the table.
+    db_drop_table($ret, 'test_table2');
+    $this->assertFalse(db_table_exists('test_table2'), t('The dropped table does not exist.'));
+
+    // Recreate the table.
+    db_create_table($ret, 'test_table', $table_specification);
+    db_field_set_default($ret, 'test_table', 'test_field', 0);
+    db_add_field($ret, 'test_table', 'test_serial', array('type' => 'int', 'not null' => TRUE, 'default' => 0));
+
+    // Change the new field to a serial column.
+    db_change_field($ret, 'test_table', 'test_table2', 'test_serial', array('type' => 'serial', 'not null' => TRUE), array('primary key' => array('test_serial')));
+
+    $this->assertTrue($this->tryInsert(), t('Insert with a serial succeeded.'));
+    $max1 = db_query('SELECT MAX(test_serial) FROM {test_table}')->fetchField();
+    $this->assertTrue($this->tryInsert(), t('Insert with a serial succeeded.'));
+    $max2 = db_query('SELECT MAX(test_serial) FROM {test_table}')->fetchField();
+    $this->assertTrue($max2 > $max1, t('The serial is monotone.'));
+
+    $count = db_query('SELECT COUNT(*) FROM {test_table}')->fetchField();
+    $this->assertEqual($count, 2, t('There were two rows.'));
+  }
+
+  function tryInsert($table = 'test_table') {
+    try {
+      db_query("INSERT INTO {" . $table . "} (id) VALUES (:id)", array(':id' => mt_rand(10,20)));
+      return TRUE;
+    }
+    catch (Exception $e) {
+      return FALSE;
+    }
+  }
+}