Migrate runmake tests away from custom commands and command_output

Author: Kobzol

src/tools/run-make-support/src/cc.rs

@@ -1,7 +1,7 @@
 use std::path::Path;
 
-use crate::{bin_name, cygpath_windows, env_var, handle_failed_output, is_msvc, is_windows, uname};
 use crate::command::Command;
+use crate::{bin_name, cygpath_windows, env_var, is_msvc, is_windows, uname};
 
 /// Construct a new platform-specific C compiler invocation.
 ///

src/tools/run-make-support/src/clang.rs

@@ -1,7 +1,7 @@
 use std::path::Path;
 
-use crate::{bin_name, env_var, handle_failed_output};
 use crate::command::Command;
+use crate::{bin_name, env_var};
 
 /// Construct a new `clang` invocation. `clang` is not always available for all targets.
 pub fn clang() -> Clang {

src/tools/run-make-support/src/command.rs

@@ -1,8 +1,12 @@
+use crate::{assert_not_contains, handle_failed_output};
 use std::ffi::OsStr;
 use std::io::Write;
 use std::ops::{Deref, DerefMut};
 use std::process::{Command as StdCommand, ExitStatus, Output, Stdio};
 
+/// This is a custom command wrapper that simplifies working with commands
+/// and makes it easier to ensure that we check the exit status of executed
+/// processes.
 #[derive(Debug)]
 pub struct Command {
     cmd: StdCommand,
@@ -11,16 +15,39 @@ pub struct Command {
 
 impl Command {
     pub fn new<S: AsRef<OsStr>>(program: S) -> Self {
-        Self {
-            cmd: StdCommand::new(program),
-            stdin: None,
-        }
+        Self { cmd: StdCommand::new(program), stdin: None }
     }
 
     pub fn set_stdin(&mut self, stdin: Box<[u8]>) {
         self.stdin = Some(stdin);
     }
 
+    /// Run the constructed command and assert that it is successfully run.
+    #[track_caller]
+    pub fn run(&mut self) -> CompletedProcess {
+        let caller_location = std::panic::Location::caller();
+        let caller_line_number = caller_location.line();
+
+        let output = self.command_output();
+        if !output.status().success() {
+            handle_failed_output(&self, output, caller_line_number);
+        }
+        output
+    }
+
+    /// Run the constructed command and assert that it does not successfully run.
+    #[track_caller]
+    pub fn run_fail(&mut self) -> CompletedProcess {
+        let caller_location = std::panic::Location::caller();
+        let caller_line_number = caller_location.line();
+
+        let output = self.command_output();
+        if output.status().success() {
+            handle_failed_output(&self, output, caller_line_number);
+        }
+        output
+    }
+
     #[track_caller]
     pub(crate) fn command_output(&mut self) -> CompletedProcess {
         // let's make sure we piped all the input and outputs
@@ -59,6 +86,8 @@ impl DerefMut for Command {
 }
 
 /// Represents the result of an executed process.
+/// The various `assert_` helper methods should preferably be used for
+/// checking the contents of stdout/stderr.
 pub struct CompletedProcess {
     output: Output,
 }
@@ -76,16 +105,47 @@ impl CompletedProcess {
         self.output.status
     }
 
+    /// Checks that trimmed `stdout` matches trimmed `content`.
+    #[track_caller]
+    pub fn assert_stdout_equals<S: AsRef<str>>(self, content: S) -> Self {
+        assert_eq!(self.stdout_utf8().trim(), content.as_ref().trim());
+        self
+    }
+
     #[track_caller]
-    pub fn assert_exit_code(&self, code: i32) {
+    pub fn assert_stdout_not_contains<S: AsRef<str>>(self, needle: S) -> Self {
+        assert_not_contains(&self.stdout_utf8(), needle.as_ref());
+        self
+    }
+
+    /// Checks that trimmed `stderr` matches trimmed `content`.
+    #[track_caller]
+    pub fn assert_stderr_equals<S: AsRef<str>>(self, content: S) -> Self {
+        assert_eq!(self.stderr_utf8().trim(), content.as_ref().trim());
+        self
+    }
+
+    #[track_caller]
+    pub fn assert_stderr_contains<S: AsRef<str>>(self, needle: S) -> Self {
+        assert!(self.stderr_utf8().contains(needle.as_ref()));
+        self
+    }
+
+    #[track_caller]
+    pub fn assert_stderr_not_contains<S: AsRef<str>>(self, needle: S) -> Self {
+        assert_not_contains(&self.stdout_utf8(), needle.as_ref());
+        self
+    }
+
+    #[track_caller]
+    pub fn assert_exit_code(self, code: i32) -> Self {
         assert!(self.output.status.code() == Some(code));
+        self
     }
 }
 
 impl From<Output> for CompletedProcess {
     fn from(output: Output) -> Self {
-        Self {
-            output
-        }
+        Self { output }
     }
 }

src/tools/run-make-support/src/lib.rs

@@ -5,12 +5,12 @@
 
 pub mod cc;
 pub mod clang;
+mod command;
 pub mod diff;
 pub mod llvm_readobj;
 pub mod run;
 pub mod rustc;
 pub mod rustdoc;
-mod command;
 
 use std::env;
 use std::ffi::OsString;
@@ -27,7 +27,7 @@ pub use cc::{cc, extra_c_flags, extra_cxx_flags, Cc};
 pub use clang::{clang, Clang};
 pub use diff::{diff, Diff};
 pub use llvm_readobj::{llvm_readobj, LlvmReadobj};
-pub use run::{run, run_fail};
+pub use run::{cmd, run, run_fail};
 pub use rustc::{aux_build, rustc, Rustc};
 pub use rustdoc::{bare_rustdoc, rustdoc, Rustdoc};
 
@@ -285,6 +285,7 @@ pub fn read_dir<F: Fn(&Path)>(dir: impl AsRef<Path>, callback: F) {
 }
 
 /// Check that `haystack` does not contain `needle`. Panic otherwise.
+#[track_caller]
 pub fn assert_not_contains(haystack: &str, needle: &str) {
     if haystack.contains(needle) {
         eprintln!("=== HAYSTACK ===");
@@ -412,27 +413,13 @@ macro_rules! impl_common_helpers {
             /// Run the constructed command and assert that it is successfully run.
             #[track_caller]
             pub fn run(&mut self) -> crate::command::CompletedProcess {
-                let caller_location = ::std::panic::Location::caller();
-                let caller_line_number = caller_location.line();
-
-                let output = self.cmd.command_output();
-                if !output.status().success() {
-                    handle_failed_output(&self.cmd, output, caller_line_number);
-                }
-                output
+                self.cmd.run()
             }
 
             /// Run the constructed command and assert that it does not successfully run.
             #[track_caller]
             pub fn run_fail(&mut self) -> crate::command::CompletedProcess {
-                let caller_location = ::std::panic::Location::caller();
-                let caller_line_number = caller_location.line();
-
-                let output = self.cmd.command_output();
-                if output.status().success() {
-                    handle_failed_output(&self.cmd, output, caller_line_number);
-                }
-                output
+                self.cmd.run_fail()
             }
 
             /// Set the path where the command will be run.
@@ -444,5 +431,5 @@ macro_rules! impl_common_helpers {
     };
 }
 
-pub(crate) use impl_common_helpers;
 use crate::command::{Command, CompletedProcess};
+pub(crate) use impl_common_helpers;

src/tools/run-make-support/src/llvm_readobj.rs

@@ -1,7 +1,7 @@
 use std::path::{Path, PathBuf};
 
-use crate::{env_var, handle_failed_output};
 use crate::command::Command;
+use crate::env_var;
 
 /// Construct a new `llvm-readobj` invocation. This assumes that `llvm-readobj` is available
 /// at `$LLVM_BIN_DIR/llvm-readobj`.

src/tools/run-make-support/src/run.rs

@@ -1,8 +1,9 @@
 use std::env;
+use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 
-use crate::{cwd, env_var, is_windows};
 use crate::command::{Command, CompletedProcess};
+use crate::{cwd, env_var, is_windows, set_host_rpath};
 
 use super::handle_failed_output;
 
@@ -62,3 +63,11 @@ pub fn run_fail(name: &str) -> CompletedProcess {
     }
     output
 }
+
+/// Create a new custom Command.
+/// This should be preferred to creating `std::process::Command` directly.
+pub fn cmd<S: AsRef<OsStr>>(program: S) -> Command {
+    let mut command = Command::new(program);
+    set_host_rpath(&mut command);
+    command
+}

src/tools/run-make-support/src/rustc.rs

@@ -1,8 +1,8 @@
+use command::Command;
 use std::ffi::{OsStr, OsString};
 use std::path::Path;
-use command::Command;
 
-use crate::{command, cwd, env_var, handle_failed_output, set_host_rpath};
+use crate::{command, cwd, env_var, set_host_rpath};
 
 /// Construct a new `rustc` invocation.
 pub fn rustc() -> Rustc {

src/tools/run-make-support/src/rustdoc.rs

@@ -1,8 +1,8 @@
 use std::ffi::OsStr;
 use std::path::Path;
 
-use crate::{env_var, env_var_os, handle_failed_output, set_host_rpath};
 use crate::command::Command;
+use crate::{env_var, env_var_os, set_host_rpath};
 
 /// Construct a plain `rustdoc` invocation with no flags set.
 pub fn bare_rustdoc() -> Rustdoc {

tests/run-make/CURRENT_RUSTC_VERSION/rmake.rs

@@ -10,14 +10,10 @@ use run_make_support::{aux_build, rustc, source_root};
 fn main() {
     aux_build().input("stable.rs").emit("metadata").run();
 
-    let output = rustc()
-        .input("main.rs")
-        .emit("metadata")
-        .extern_("stable", "libstable.rmeta")
-        .command_output();
+    let output =
+        rustc().input("main.rs").emit("metadata").extern_("stable", "libstable.rmeta").run();
 
-    let stderr = String::from_utf8_lossy(&output.stderr);
     let version = std::fs::read_to_string(source_root().join("src/version")).unwrap();
     let expected_string = format!("stable since {}", version.trim());
-    assert!(stderr.contains(&expected_string));
+    output.assert_stderr_contains(expected_string);
 }

tests/run-make/allow-warnings-cmdline-stability/rmake.rs

@@ -1,11 +1,13 @@
 // Test that `-Awarnings` suppresses warnings for unstable APIs.
 
-use run_make_support::{assert_not_contains, rustc};
+use run_make_support::rustc;
 
 fn main() {
     rustc().input("bar.rs").run();
-    let output = rustc().input("foo.rs").arg("-Awarnings").run();
-
-    assert_not_contains(&String::from_utf8(output.stdout).unwrap(), "warning");
-    assert_not_contains(&String::from_utf8(output.stderr).unwrap(), "warning");
+    rustc()
+        .input("foo.rs")
+        .arg("-Awarnings")
+        .run()
+        .assert_stdout_not_contains("warning")
+        .assert_stderr_not_contains("warning");
 }