You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pointers.rs
    path of file: ./repos/wasmtime/crates/wiggle/tests
    
    the code of the file until where you have to start completion: use proptest::prelude::*;
use wiggle::{GuestMemory, GuestPtr};
use wiggle_test::{impl_errno, HostMemory, MemArea, WasiCtx};

wiggle::from_witx!({
    witx: ["$CARGO_MANIFEST_DIR/tests/pointers.witx"],
});

impl_errno!(types::Errno);

impl<'a> pointers::Pointers for WasiCtx<'a> {
    fn pointers_and_enums<'b>(
        &mut self,
        input1: types::Excuse,
       
    
    pub fn test(&self) {
        let mut ctx = WasiCtx::new();
        let host_memory = HostMemory::new();

        host_memory
            .ptr(self.input2_loc.ptr)
            .write(self.input2)
            .expect("input2 ref_mut");

        host_memory
            .ptr(self.input3_loc.ptr)
            .write(self.input3)
            .expect("input3 ref_mut");

        host_memory
            .ptr(self.input4_loc.ptr)
            .write(self.input4)
            .expect("input4 ref_mut");

        host_memory
            .ptr(self.input4_ptr_loc.ptr)
            .write(self.input4_loc.ptr)
            .expect("input4 ptr ref_mut");

        let e = pointers::pointers_and_enums(
            &mut ctx,
            &host_memory,
            self.input1 as i32,
            self.input2_loc.ptr as i32,
            self.input3_loc.ptr as i32,
            self.input4_ptr_loc.ptr as i32,
        )
        .unwrap();
        assert_eq!(e, types::Errno::Ok as i32, "errno");

        // Implementation of pointers_and_enums writes input3 to the input2_loc:
        let written_to_input2_loc: i32 = host_memory
            .ptr(self.input2_loc.ptr)
            .read()
            .expect("input2 ref");

        assert_eq!(
            written_to_input2_loc, self.input3 as i32,
            "pointers_and_enums written to input2"
        );

        // Implementation of pointers_and_enums writes input2_loc to input4_ptr_loc:
        let written_to_input4_ptr: u32 = host_memory
            .ptr(self.input4_ptr_loc.ptr)
            .read()
            .expect("input4_ptr_loc ref");

        assert_eq!(
            written_to_input4_ptr, self.input2_loc.ptr,
            "pointers_and_enums written to input4_ptr"
        );
    }