Sunnyvale-based AirMagnet, a developer of wireless testing tools, has been acquired by test equipment firm Fluke Networks. Financial details of the acquisition were not disclosed. Fluke disclosed the acquisition Thursday afternoon. Airmagnet develops WLAN security and performance management tools, Wi-Fi troubleshooting tools, plus other WiFi spectrum analysis and survey tools. AirMagnet is backed by VenGlobal, Acer Technology Ventures and Intel Capital, and says it has been profitable since 2002.