ntwb / wordpress

			admin_url( 'edit.php#frag', 'https' ),

		);

		foreach ( $urls as $url ) {

			$_SERVER['REQUEST_URI'] = 'nothing';

			$this->assertEquals( "$url?foo=1", add_query_arg( 'foo', '1', $url ) );

			$this->assertEquals( "$url?foo=1", add_query_arg( array( 'foo' => '1' ), $url ) );

			$this->assertEquals( "$url?foo=2", add_query_arg( array( 'foo' => '1', 'foo' => '2' ), $url ) );

			$this->assertEquals( "$url?foo=1&bar=2", add_query_arg( array( 'foo' => '1', 'bar' => '2' ), $url ) );

			$_SERVER['REQUEST_URI'] = $url;

			$this->assertEquals( "$url?foo=1", add_query_arg( 'foo', '1' ) );

			$this->assertEquals( "$url?foo=1", add_query_arg( array( 'foo' => '1' ) ) );

			$this->assertEquals( "$url?foo=2", add_query_arg( array( 'foo' => '1', 'foo' => '2' ) ) );

			$this->assertEquals( "$url?foo=1&bar=2", add_query_arg( array( 'foo' => '1', 'bar' => '2' ) ) );

		}

		foreach ( $frag_urls as $frag_url ) {

			$_SERVER['REQUEST_URI'] = 'nothing';

			admin_url( 'edit.php?baz=0&za=0' ),

		);

		foreach ( $qs_urls as $url ) {

			$_SERVER['REQUEST_URI'] = 'nothing';

			$this->assertEquals( "$url&foo=1", add_query_arg( 'foo', '1', $url ) );

			$this->assertEquals( "$url&foo=1", add_query_arg( array( 'foo' => '1' ), $url ) );

			$this->assertEquals( "$url&foo=2", add_query_arg( array( 'foo' => '1', 'foo' => '2' ), $url ) );

			$this->assertEquals( "$url&foo=1&bar=2", add_query_arg( array( 'foo' => '1', 'bar' => '2' ), $url ) );

			$_SERVER['REQUEST_URI'] = $url;

			$this->assertEquals( "$url&foo=1", add_query_arg( 'foo', '1' ) );

			$this->assertEquals( "$url&foo=1", add_query_arg( array( 'foo' => '1' ) ) );

			$this->assertEquals( "$url&foo=2", add_query_arg( array( 'foo' => '1', 'foo' => '2' ) ) );

			$this->assertEquals( "$url&foo=1&bar=2", add_query_arg( array( 'foo' => '1', 'bar' => '2' ) ) );

		}

		$_SERVER['REQUEST_URI'] = $old_req_uri;

	}