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use anyhow::{bail, Result};
use std::io::Write;
use std::path::Path;
use std::process::{Command, Output};
use tempfile::{NamedTempFile, TempDir};
// Run the wasmtime CLI with the provided args and return the `Output`.
fn run_wasmtime_for_output(args: &[&str]) -> Result<Output> {
let runner = std::env::vars()
.filter(|(k, _v)| k.starts_with("CARGO_TARGET") && k.ends_with("RUNNER"))
.next();
let mut me = std::env::current_exe()?;
me.pop(); // chop off the file name
me.pop(); // chop off `deps`
me.push("wasmtime");
// If we're running tests with a "runner" then we might be doing something
// like cross-emulation, so spin up the emulator rather than the tests
// itself, which may not be natively executable.
let mut cmd = if let Some((_, runner)) = runner {
let mut parts = runner.split_whitespace();
let mut cmd = Command::new(parts.next().unwrap());
for arg in parts {
cmd.arg(arg);
}
cmd.arg(&me);
cmd
} else {
Command::new(&me)
};
cmd.args(args).output().map_err(Into::into)
}
// Run the wasmtime CLI with the provided args and, if it succeeds, return
// the standard output in a `String`.
fn run_wasmtime(args: &[&str]) -> Result<String> {
let output = run_wasmtime_for_output(args)?;
if !output.status.success() {
bail!(
"Failed to execute wasmtime with: {:?}\n{}",
args,
String::from_utf8_lossy(&output.stderr)
);
}
Ok(String::from_utf8(output.stdout).unwrap())
}
fn build_wasm(wat_path: impl AsRef<Path>) -> Result<NamedTempFile> {
let mut wasm_file = NamedTempFile::new()?;
let wasm = wat::parse_file(wat_path)?;
wasm_file.write(&wasm)?;
Ok(wasm_file)
}
// Very basic use case: compile binary wasm file and run specific function with arguments.
#[test]
fn run_wasmtime_simple() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/simple.wat")?;
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--invoke",
"simple",
"--disable-cache",
"4",
])?;
Ok(())
}
// Wasmtime shakk when not enough arguments were provided.
#[test]
fn run_wasmtime_simple_fail_no_args() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/simple.wat")?;
assert!(
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--disable-cache",
"--invoke",
"simple",
])
.is_err(),
"shall fail"
);
Ok(())
}
// Running simple wat
#[test]
fn run_wasmtime_simple_wat() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/simple.wat")?;
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--invoke",
"simple",
"--disable-cache",
"4",
])?;
assert_eq!(
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--invoke",
"get_f32",
"--disable-cache",
])?,
"100\n"
);
assert_eq!(
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--invoke",
"get_f64",
"--disable-cache",
])?,
"100\n"
);
Ok(())
}
// Running a wat that traps.
#[test]
fn run_wasmtime_unreachable_wat() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/unreachable.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_ne!(output.stderr, b"");
assert_eq!(output.stdout, b"");
assert!(!output.status.success());
let code = output
.status
.code()
.expect("wasmtime process should exit normally");
// Test for the specific error code Wasmtime uses to indicate a trap return.
#[cfg(unix)]
assert_eq!(code, 128 + libc::SIGABRT);
#[cfg(windows)]
assert_eq!(code, 3);
Ok(())
}
// Run a simple WASI hello world, snapshot0 edition.
#[test]
fn hello_wasi_snapshot0() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/hello_wasi_snapshot0.wat")?;
let stdout = run_wasmtime(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(stdout, "Hello, world!\n");
Ok(())
}
// Run a simple WASI hello world, snapshot1 edition.
#[test]
fn hello_wasi_snapshot1() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/hello_wasi_snapshot1.wat")?;
let stdout = run_wasmtime(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(stdout, "Hello, world!\n");
Ok(())
}
#[test]
fn timeout_in_start() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/iloop-start.wat")?;
let output = run_wasmtime_for_output(&[
"run",
wasm.path().to_str().unwrap(),
"--wasm-timeout",
"1ms",
"--disable-cache",
])?;
assert!(!output.status.success());
assert_eq!(output.stdout, b"");
let stderr = String::from_utf8_lossy(&output.stderr);
assert!(
stderr.contains("wasm trap: interrupt"),
"bad stderr: {}",
stderr
);
Ok(())
}
#[test]
fn timeout_in_invoke() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/iloop-invoke.wat")?;
let output = run_wasmtime_for_output(&[
"run",
wasm.path().to_str().unwrap(),
"--wasm-timeout",
"1ms",
"--disable-cache",
])?;
assert!(!output.status.success());
assert_eq!(output.stdout, b"");
let stderr = String::from_utf8_lossy(&output.stderr);
assert!(
stderr.contains("wasm trap: interrupt"),
"bad stderr: {}",
stderr
);
Ok(())
}
// Exit with a valid non-zero exit code, snapshot0 edition.
#[test]
fn exit2_wasi_snapshot0() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit2_wasi_snapshot0.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(output.status.code().unwrap(), 2);
Ok(())
}
// Exit with a valid non-zero exit code, snapshot1 edition.
#[test]
fn exit2_wasi_snapshot1() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit2_wasi_snapshot1.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(output.status.code().unwrap(), 2);
Ok(())
}
// Exit with a valid non-zero exit code, snapshot0 edition.
#[test]
fn exit125_wasi_snapshot0() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit125_wasi_snapshot0.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
if cfg!(windows) {
assert_eq!(output.status.code().unwrap(), 1);
} else {
assert_eq!(output.status.code().unwrap(), 125);
}
Ok(())
}
// Exit with a valid non-zero exit code, snapshot1 edition.
#[test]
fn exit125_wasi_snapshot1() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit125_wasi_snapshot1.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
if cfg!(windows) {
assert_eq!(output.status.code().unwrap(), 1);
} else {
assert_eq!(output.status.code().unwrap(), 125);
}
Ok(())
}
// Exit with an invalid non-zero exit code, snapshot0 edition.
#[test]
fn exit126_wasi_snapshot0() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit126_wasi_snapshot0.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
if cfg!(windows) {
assert_eq!(output.status.code().unwrap(), 3);
} else {
assert_eq!(output.status.code().unwrap(), 128 + libc::SIGABRT);
}
assert!(output.stdout.is_empty());
assert!(String::from_utf8_lossy(&output.stderr).contains("invalid exit status"));
Ok(())
}
// Exit with an invalid non-zero exit code, snapshot1 edition.
#[test]
fn exit126_wasi_snapshot1() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit126_wasi_snapshot1.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
if cfg!(windows) {
assert_eq!(output.status.code().unwrap(), 3);
} else {
assert_eq!(output.status.code().unwrap(), 128 + libc::SIGABRT);
}
assert!(output.stdout.is_empty());
assert!(String::from_utf8_lossy(&output.stderr).contains("invalid exit status"));
Ok(())
}
// Run a minimal command program.
#[test]
fn minimal_command() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/minimal-command.wat")?;
let stdout = run_wasmtime(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(stdout, "");
Ok(())
}
// Run a minimal reactor program.
#[test]
fn minimal_reactor() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/minimal-reactor.wat")?;
let stdout = run_wasmtime(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(stdout, "");
Ok(())
}
// Attempt to call invoke on a command.
#[test]
fn command_invoke() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/minimal-command.wat")?;
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--invoke",
"_start",
"--disable-cache",
])?;
Ok(())
}
// Attempt to call invoke on a command.
#[test]
fn reactor_invoke() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/minimal-reactor.wat")?;
run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--invoke",
"_initialize",
"--disable-cache",
])?;
Ok(())
}
// Run the greeter test, which runs a preloaded reactor and a command.
#[test]
fn greeter() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/greeter_command.wat")?;
let stdout = run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--disable-cache",
"--preload",
"reactor=tests/all/cli_tests/greeter_reactor.wat",
])?;
assert_eq!(
stdout,
"Hello _initialize\nHello _start\nHello greet\nHello done\n"
);
Ok(())
}
// Run the greeter test, but this time preload a command.
#[test]
fn greeter_preload_command() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/greeter_reactor.wat")?;
let stdout = run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--disable-cache",
"--preload",
"reactor=tests/all/cli_tests/hello_wasi_snapshot1.wat",
])?;
assert_eq!(stdout, "Hello _initialize\n");
Ok(())
}
// Run the greeter test, which runs a preloaded reactor and a command.
#[test]
fn greeter_preload_callable_command() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/greeter_command.wat")?;
let stdout = run_wasmtime(&[
"run",
wasm.path().to_str().unwrap(),
"--disable-cache",
"--preload",
"reactor=tests/all/cli_tests/greeter_callable_command.wat",
])?;
assert_eq!(stdout, "Hello _start\nHello callable greet\nHello done\n");
Ok(())
}
// Ensure successful WASI exit call with FPR saving frames on stack for Windows x64
// See https://github.com/bytecodealliance/wasmtime/issues/1967
#[test]
fn exit_with_saved_fprs() -> Result<()> {
let wasm = build_wasm("tests/all/cli_tests/exit_with_saved_fprs.wat")?;
let output = run_wasmtime_for_output(&[wasm.path().to_str().unwrap(), "--disable-cache"])?;
assert_eq!(output.status.code().unwrap(), 0);
assert!(output.stdout.is_empty());
Ok(())
}
#[test]
fn run_cwasm() -> Result<()> {
let td = TempDir::new()?;
let cwasm = td.path().join("foo.cwasm");
let stdout = run_wasmtime(&[
"compile",
"tests/all/cli_tests/simple.wat",
"-o",
cwasm.to_str().unwrap(),
])?;
assert_eq!(stdout, "");
let stdout = run_wasmtime(&["run", "--allow-precompiled", cwasm.to_str().unwrap()])?;
assert_eq!(stdout, "");
Ok(())
}