def METHOD_NAME(self):
    tf = tempfile.NamedTemporaryFile(mode="w")
    tf.write('TELEMETRY tgt1 pkt1 LITTLE_ENDIAN "Packet"\n')
    tf.write("  ITEM item1 0 32 FLOAT\n")
    tf.write('    FORMAT_STRING "%3.3f"\n')
    tf.seek(0)
    self.pc.process_file(tf.name, "TGT1")
    self.pc.telemetry["TGT1"]["PKT1"].write("ITEM1", 12345.12345)
    self.assertEqual(
        self.pc.telemetry["TGT1"]["PKT1"].read("ITEM1", "FORMATTED"), "12345.123"
    )
    tf.close()