Add initial tests for multiple build scripts (not implemented yet)

Author: namanlp

tests/testsuite/build_scripts_multiple.rs

@@ -0,0 +1,103 @@
+//! Tests for multiple build scripts feature.
+
+use cargo_test_support::prelude::*;
+use cargo_test_support::project;
+use cargo_test_support::str;
+
+#[cargo_test]
+fn build_without_feature_enabled_aborts_with_error() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2024"
+                build = ["build1.rs", "build2.rs"]
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .file("build1.rs", "fn main() {}")
+        .file("build2.rs", "fn main() {}")
+        .build();
+    p.cargo("check")
+        .masquerade_as_nightly_cargo(&["multiple-build-scripts"])
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] failed to parse manifest at `[ROOT]/foo/Cargo.toml`
+
+Caused by:
+  feature `multiple-build-scripts` is required
+
+  The package requires the Cargo feature called `multiple-build-scripts`, but that feature is not stabilized in this version of Cargo (1.89.0 (158dd3559 2025-06-11)).
+  Consider adding `cargo-features = ["multiple-build-scripts"]` to the top of Cargo.toml (above the [package] table) to tell Cargo you are opting in to use this unstable feature.
+  See https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#multiple-build-scripts for more information about the status of this feature.
+
+"#]])
+        .run();
+}
+
+#[cargo_test]
+fn empty_multiple_build_script_project() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["multiple-build-scripts"]
+
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2024"
+                build = ["build1.rs", "build2.rs"]
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .file("build1.rs", "fn main() {}")
+        .file("build2.rs", "fn main() {}")
+        .build();
+    p.cargo("check")
+        .masquerade_as_nightly_cargo(&["multiple-build-scripts"])
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] failed to parse manifest at `[ROOT]/foo/Cargo.toml`
+
+Caused by:
+  multiple build scripts feature is not implemented yet!
+
+"#]])
+        .run();
+}
+
+#[cargo_test]
+fn multiple_build_scripts_metadata() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["multiple-build-scripts"]
+
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2024"
+                build = ["build1.rs", "build2.rs"]
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .file("build1.rs", "fn main() {}")
+        .file("build2.rs", "fn main() {}")
+        .build();
+    p.cargo("metadata --format-version=1")
+        .masquerade_as_nightly_cargo(&["multiple-build-scripts"])
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] failed to parse manifest at `[ROOT]/foo/Cargo.toml`
+
+Caused by:
+  multiple build scripts feature is not implemented yet!
+
+"#]])
+        .run();
+}

tests/testsuite/main.rs

@@ -16,6 +16,7 @@ mod build_plan;
 mod build_script;
 mod build_script_env;
 mod build_script_extra_link_arg;
+mod build_scripts_multiple;
 mod cache_lock;
 mod cache_messages;
 mod cargo;