test(resolver): Verify some more msrv cases

tests/testsuite/rust_version.rs

@@ -1,6 +1,6 @@
 //! Tests for targets with `rust-version`.
 
-use cargo_test_support::{project, registry::Package};
+use cargo_test_support::{cargo_process, project, registry::Package};
 
 #[cargo_test]
 fn rust_version_satisfied() {
@@ -605,6 +605,57 @@ See https://github.com/rust-lang/cargo/issues/9930 for more information about th
         .run();
 }
 
+#[cargo_test]
+fn update_precise_overrides_msrv_resolver() {
+    Package::new("bar", "1.5.0")
+        .rust_version("1.55.0")
+        .file("src/lib.rs", "fn other_stuff() {}")
+        .publish();
+    Package::new("bar", "1.6.0")
+        .rust_version("1.65.0")
+        .file("src/lib.rs", "fn other_stuff() {}")
+        .publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.0.1"
+            edition = "2015"
+            authors = []
+            rust-version = "1.60.0"
+            [dependencies]
+            bar = "1.0.0"
+        "#,
+        )
+        .file("src/main.rs", "fn main(){}")
+        .build();
+
+    p.cargo("update")
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `dummy-registry` index
+[LOCKING] 2 packages to latest Rust 1.60.0 compatible versions
+[ADDING] bar v1.5.0 (latest: v1.6.0)
+",
+        )
+        .run();
+    p.cargo("update --precise 1.6.0 bar")
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `dummy-registry` index
+[UPDATING] bar v1.5.0 -> v1.6.0
+",
+        )
+        .run();
+}
+
 #[cargo_test]
 fn check_msrv_resolve() {
     Package::new("only-newer", "1.6.0")
@@ -693,3 +744,47 @@ foo v0.0.1 ([CWD])
         )
         .run();
 }
+
+#[cargo_test]
+fn cargo_install_ignores_msrv_config() {
+    Package::new("dep", "1.0.0")
+        .rust_version("1.50")
+        .file("src/lib.rs", "fn hello() {}")
+        .publish();
+    Package::new("dep", "1.1.0")
+        .rust_version("1.70")
+        .file("src/lib.rs", "fn hello() {}")
+        .publish();
+    Package::new("foo", "0.0.1")
+        .rust_version("1.60")
+        .file("src/main.rs", "fn main() {}")
+        .dep("dep", "1")
+        .publish();
+
+    cargo_process("install foo")
+        .env(
+            "CARGO_RESOLVER_SOMETHING_LIKE_PRECEDENCE",
+            "something-like-rust-version",
+        )
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+[DOWNLOADING] crates ...
+[DOWNLOADED] foo v0.0.1 (registry [..])
+[INSTALLING] foo v0.0.1
+[LOCKING] 2 packages to latest Rust 1.60 compatible versions
+[ADDING] dep v1.0.0 (latest: v1.1.0)
+[DOWNLOADING] crates ...
+[DOWNLOADED] dep v1.0.0 (registry [..])
+[COMPILING] dep v1.0.0
+[COMPILING] foo v0.0.1
+[FINISHED] `release` profile [optimized] target(s) in [..]
+[INSTALLING] [CWD]/home/.cargo/bin/foo[EXE]
+[INSTALLED] package `foo v0.0.1` (executable `foo[EXE]`)
+[WARNING] be sure to add `[..]` to your PATH to be able to run the installed binaries
+",
+        )
+        .run();
+}