test(resolver): Create baseline for `-Zdirect-minimal-versions

Author: epage

tests/testsuite/direct_minimal_versions.rs

@@ -0,0 +1,38 @@
+//! Tests for minimal-version resolution.
+//!
+//! Note: Some tests are located in the resolver-tests package.
+
+use cargo_test_support::project;
+use cargo_test_support::registry::Package;
+
+// Ensure that the "-Z minimal-versions" CLI option works and the minimal
+// version of a dependency ends up in the lock file.
+#[cargo_test]
+fn minimal_version_cli() {
+    Package::new("dep", "1.0.0").publish();
+    Package::new("dep", "1.1.0").publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                authors = []
+                version = "0.0.1"
+
+                [dependencies]
+                dep = "1.0"
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("generate-lockfile -Zminimal-versions")
+        .masquerade_as_nightly_cargo(&["minimal-versions"])
+        .run();
+
+    let lock = p.read_lockfile();
+
+    assert!(!lock.contains("1.1.0"));
+}

tests/testsuite/main.rs

@@ -43,6 +43,7 @@ mod cross_publish;
 mod custom_target;
 mod death;
 mod dep_info;
+mod direct_minimal_versions;
 mod directory;
 mod doc;
 mod docscrape;