1 files changed, 111 insertions, 0 deletions
diff --git a/src/tools/cargo/tests/testsuite/warn_on_failure.rs b/src/tools/cargo/tests/testsuite/warn_on_failure.rs
new file mode 100644
index 000000000..19cb01813
--- /dev/null
+++ b/src/tools/cargo/tests/testsuite/warn_on_failure.rs
@@ -0,0 +1,111 @@
+//! Tests for whether or not warnings are displayed for build scripts.
+
+use cargo_test_support::registry::Package;
+use cargo_test_support::{project, Project};
+
+static WARNING1: &str = "Hello! I'm a warning. :)";
+static WARNING2: &str = "And one more!";
+
+fn make_lib(lib_src: &str) {
+    Package::new("bar", "0.0.1")
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "bar"
+                authors = []
+                version = "0.0.1"
+                build = "build.rs"
+            "#,
+        )
+        .file(
+            "build.rs",
+            &format!(
+                r#"
+                    fn main() {{
+                        use std::io::Write;
+                        println!("cargo:warning={{}}", "{}");
+                        println!("hidden stdout");
+                        write!(&mut ::std::io::stderr(), "hidden stderr");
+                        println!("cargo:warning={{}}", "{}");
+                    }}
+                "#,
+                WARNING1, WARNING2
+            ),
+        )
+        .file("src/lib.rs", &format!("fn f() {{ {} }}", lib_src))
+        .publish();
+}
+
+fn make_upstream(main_src: &str) -> Project {
+    project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+
+                [dependencies]
+                bar = "*"
+            "#,
+        )
+        .file("src/main.rs", &format!("fn main() {{ {} }}", main_src))
+        .build()
+}
+
+#[cargo_test]
+fn no_warning_on_success() {
+    make_lib("");
+    let upstream = make_upstream("");
+    upstream
+        .cargo("build")
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+[DOWNLOADING] crates ...
+[DOWNLOADED] bar v0.0.1 ([..])
+[COMPILING] bar v0.0.1
+[COMPILING] foo v0.0.1 ([..])
+[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
+",
+        )
+        .run();
+}
+
+#[cargo_test]
+fn no_warning_on_bin_failure() {
+    make_lib("");
+    let upstream = make_upstream("hi()");
+    upstream
+        .cargo("build")
+        .with_status(101)
+        .with_stdout_does_not_contain("hidden stdout")
+        .with_stderr_does_not_contain("hidden stderr")
+        .with_stderr_does_not_contain(&format!("[WARNING] {}", WARNING1))
+        .with_stderr_does_not_contain(&format!("[WARNING] {}", WARNING2))
+        .with_stderr_contains("[UPDATING] `[..]` index")
+        .with_stderr_contains("[DOWNLOADED] bar v0.0.1 ([..])")
+        .with_stderr_contains("[COMPILING] bar v0.0.1")
+        .with_stderr_contains("[COMPILING] foo v0.0.1 ([..])")
+        .run();
+}
+
+#[cargo_test]
+fn warning_on_lib_failure() {
+    make_lib("err()");
+    let upstream = make_upstream("");
+    upstream
+        .cargo("build")
+        .with_status(101)
+        .with_stdout_does_not_contain("hidden stdout")
+        .with_stderr_does_not_contain("hidden stderr")
+        .with_stderr_does_not_contain("[COMPILING] foo v0.0.1 ([..])")
+        .with_stderr_contains("[UPDATING] `[..]` index")
+        .with_stderr_contains("[DOWNLOADED] bar v0.0.1 ([..])")
+        .with_stderr_contains("[COMPILING] bar v0.0.1")
+        .with_stderr_contains(&format!("[WARNING] {}", WARNING1))
+        .with_stderr_contains(&format!("[WARNING] {}", WARNING2))
+        .run();
+}