Auto merge of #14210 - eth3lbert:snapbox-mmn, r=epage

test: migrate member_errors, multitarget and new to snapbox

### What does this PR try to resolve?

Part of #14039.

Migrate following to snapbox:

- `tests/testsuite/member_errors.rs`
- `tests/testsuite/multitarget.rs`
- `tests/testsuite/new.rs`

tests/testsuite/member_errors.rs

@@ -1,7 +1,5 @@
 //! Tests for workspace member errors.
 
-#![allow(deprecated)]
-
 use cargo::core::resolver::ResolveError;
 use cargo::core::{compiler::CompileMode, Shell, Workspace};
 use cargo::ops::{self, CompileOptions};
@@ -10,6 +8,7 @@ use cargo::util::{context::GlobalContext, errors::ManifestError};
 use cargo_test_support::install::cargo_home;
 use cargo_test_support::project;
 use cargo_test_support::registry;
+use cargo_test_support::str;
 
 /// Tests inclusion of a `ManifestError` pointing to a member manifest
 /// when that manifest fails to deserialize.
@@ -48,18 +47,17 @@ fn toml_deserialize_manifest_error() {
 
     p.cargo("check")
         .with_status(101)
-        .with_stderr(
-            "\
+        .with_stderr_data(str![[r#"
 [ERROR] invalid string
-expected `\"`, `'`
+expected `"`, `'`
  --> bar/Cargo.toml:8:25
   |
-8 |                 foobar == \"0.55\"
+8 |                 foobar == "0.55"
   |                         ^
   |
 [ERROR] failed to load manifest for dependency `bar`
-",
-        )
+
+"#]])
         .run();
 }
 

tests/testsuite/multitarget.rs

@@ -1,8 +1,7 @@
 //! Tests for multiple `--target` flags to subcommands
 
-#![allow(deprecated)]
-
-use cargo_test_support::{basic_manifest, cross_compile, project, rustc_host};
+use cargo_test_support::prelude::*;
+use cargo_test_support::{basic_manifest, cross_compile, project, rustc_host, str};
 
 #[cargo_test]
 fn simple_build() {
@@ -71,8 +70,15 @@ fn simple_test() {
         .arg(&t1)
         .arg("--target")
         .arg(&t2)
-        .with_stderr_contains(&format!("[RUNNING] [..]{}[..]", t1))
-        .with_stderr_contains(&format!("[RUNNING] [..]{}[..]", t2))
+        .with_stderr_data(
+            str![[r#"
+[RUNNING] unittests src/lib.rs (target/[ALT_TARGET]/debug/deps/foo-[HASH][EXE])
+[RUNNING] unittests src/lib.rs (target/[HOST_TARGET]/debug/deps/foo-[HASH][EXE])
+...
+
+"#]]
+            .unordered(),
+        )
         .run();
 }
 
@@ -84,7 +90,10 @@ fn simple_run() {
         .build();
 
     p.cargo("run --target a --target b")
-        .with_stderr("[ERROR] only one `--target` argument is supported")
+        .with_stderr_data(str![[r#"
+[ERROR] only one `--target` argument is supported
+
+"#]])
         .with_status(101)
         .run();
 }
@@ -130,12 +139,12 @@ fn simple_doc_open() {
         .arg(&t1)
         .arg("--target")
         .arg(&t2)
-        .with_stderr(
-            "\
-[DOCUMENTING] foo v1.0.0 ([..])
-[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [..]
-[ERROR] only one `--target` argument is supported",
-        )
+        .with_stderr_data(str![[r#"
+[DOCUMENTING] foo v1.0.0 ([ROOT]/foo)
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+[ERROR] only one `--target` argument is supported
+
+"#]])
         .with_status(101)
         .run();
 }