Do not use panic_semihosting during tests

examples/serial.rs

@@ -8,13 +8,13 @@
 #![no_main]
 #![no_std]
 
-extern crate panic_semihosting;
-
 use cortex_m_rt::entry;
 //use cortex_m_semihosting::hprintln;
 use hal::block;
 use hal::prelude::*;
 use hal::serial::{config::Config as SerialConfig, Serial};
+#[cfg(not(test))]
+use panic_semihosting as _;
 
 #[entry]
 fn main() -> ! {

examples/spi.rs

@@ -8,13 +8,13 @@
 #![no_main]
 #![no_std]
 
-extern crate panic_semihosting;
-
 use cortex_m_rt::entry;
 use cortex_m_semihosting::hprintln;
 //use hal::block;
 use hal::prelude::*;
 use hal::spi::{Mode, Phase, Polarity, Spi};
+#[cfg(not(test))]
+use panic_semihosting as _;
 
 #[entry]
 fn main() -> ! {

src/main.rs

@@ -22,6 +22,7 @@ use hal::{
     stm32::{EXTI, SPI1, USART2},
 };
 use heapless::{consts::U8, Vec};
+#[cfg(not(test))]
 use panic_semihosting as _;
 use rtfm::app;