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diff --git a/tests/phpunit/includes/password/PasswordPolicyChecksTest.php b/tests/phpunit/includes/password/PasswordPolicyChecksTest.php
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+++ b/tests/phpunit/includes/password/PasswordPolicyChecksTest.php
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+<?php
+/**
+ * Testing password-policy check functions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+class PasswordPolicyChecksTest extends MediaWikiTestCase {
+
+	/**
+	 * @covers PasswordPolicyChecks::checkMinimalPasswordLength
+	 */
+	public function testCheckMinimalPasswordLength() {
+		$statusOK = PasswordPolicyChecks::checkMinimalPasswordLength(
+			3, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertTrue( $statusOK->isGood(), 'Password is longer than minimal policy' );
+		$statusShort = PasswordPolicyChecks::checkMinimalPasswordLength(
+			10, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertFalse(
+			$statusShort->isGood(),
+			'Password is shorter than minimal policy'
+		);
+		$this->assertTrue(
+			$statusShort->isOk(),
+			'Password is shorter than minimal policy, not fatal'
+		);
+	}
+
+	/**
+	 * @covers PasswordPolicyChecks::checkMinimumPasswordLengthToLogin
+	 */
+	public function testCheckMinimumPasswordLengthToLogin() {
+		$statusOK = PasswordPolicyChecks::checkMinimumPasswordLengthToLogin(
+			3, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertTrue( $statusOK->isGood(), 'Password is longer than minimal policy' );
+		$statusShort = PasswordPolicyChecks::checkMinimumPasswordLengthToLogin(
+			10, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertFalse(
+			$statusShort->isGood(),
+			'Password is shorter than minimum login policy'
+		);
+		$this->assertFalse(
+			$statusShort->isOk(),
+			'Password is shorter than minimum login policy, fatal'
+		);
+	}
+
+	/**
+	 * @covers PasswordPolicyChecks::checkMaximalPasswordLength
+	 */
+	public function testCheckMaximalPasswordLength() {
+		$statusOK = PasswordPolicyChecks::checkMaximalPasswordLength(
+			100, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertTrue( $statusOK->isGood(), 'Password is shorter than maximal policy' );
+		$statusLong = PasswordPolicyChecks::checkMaximalPasswordLength(
+			4, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertFalse( $statusLong->isGood(),
+			'Password is longer than maximal policy'
+		);
+		$this->assertFalse( $statusLong->isOk(),
+			'Password is longer than maximal policy, fatal'
+		);
+	}
+
+	/**
+	 * @covers PasswordPolicyChecks::checkPasswordCannotMatchUsername
+	 */
+	public function testCheckPasswordCannotMatchUsername() {
+		$statusOK = PasswordPolicyChecks::checkPasswordCannotMatchUsername(
+			1, // policy value
+			User::newFromName( 'user' ), // User
+			'password'  // password
+		);
+		$this->assertTrue( $statusOK->isGood(), 'Password does not match username' );
+		$statusLong = PasswordPolicyChecks::checkPasswordCannotMatchUsername(
+			1, // policy value
+			User::newFromName( 'user' ), // User
+			'user'  // password
+		);
+		$this->assertFalse( $statusLong->isGood(), 'Password matches username' );
+		$this->assertTrue( $statusLong->isOk(), 'Password matches username, not fatal' );
+	}
+
+	/**
+	 * @covers PasswordPolicyChecks::checkPasswordCannotMatchBlacklist
+	 */
+	public function testCheckPasswordCannotMatchBlacklist() {
+		$statusOK = PasswordPolicyChecks::checkPasswordCannotMatchBlacklist(
+			true, // policy value
+			User::newFromName( 'Username' ), // User
+			'AUniquePassword'  // password
+		);
+		$this->assertTrue( $statusOK->isGood(), 'Password is not on blacklist' );
+		$statusLong = PasswordPolicyChecks::checkPasswordCannotMatchBlacklist(
+			true, // policy value
+			User::newFromName( 'Useruser1' ), // User
+			'Passpass1'  // password
+		);
+		$this->assertFalse( $statusLong->isGood(), 'Password matches blacklist' );
+		$this->assertTrue( $statusLong->isOk(), 'Password matches blacklist, not fatal' );
+	}
+
+}