From bbe1d0cd5612109ec87e3a2c8ed4ae508e90fade Mon Sep 17 00:00:00 2001
From: Vinzent Steinberg <Vinzent.Steinberg@gmail.com>
Date: Sat, 10 Apr 2021 00:48:58 -0300
Subject: [PATCH] Improve error message for `cargo test`

There is a custom compiler error, hinting that the "debug", "compare"
and "rand" feature are required for compiling and running the tests.
However, this error was not displayed when running `cargo test` due to
other compilation errors taking precedence.

This is now avoided by just not compiling the integration tests when the
necessary features are not enabled.
---
 tests/lib.rs | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tests/lib.rs b/tests/lib.rs
index add7a468..8ee85f07 100644
--- a/tests/lib.rs
+++ b/tests/lib.rs
@@ -1,8 +1,4 @@
-#[cfg(any(
-    not(feature = "debug"),
-    not(feature = "compare"),
-    not(feature = "rand")
-))]
+#[cfg(not(all(feature = "debug", feature = "compare", feature = "rand")))]
 compile_error!(
     "Please enable the `debug`, `compare`, and `rand` features in order to compile and run the tests.
      Example: `cargo test --features debug,compare,rand`"
@@ -10,18 +6,25 @@ compile_error!(
 
 #[cfg(feature = "abomonation-serialize")]
 extern crate abomonation;
+#[cfg(all(feature = "debug", feature = "compare", feature = "rand"))]
 #[macro_use]
 extern crate approx;
 extern crate nalgebra as na;
 extern crate num_traits as num;
+#[cfg(feature = "rand")]
 extern crate rand_package as rand;
 
+#[cfg(all(feature = "debug", feature = "compare", feature = "rand"))]
 mod core;
+#[cfg(all(feature = "debug", feature = "compare", feature = "rand"))]
 mod geometry;
+#[cfg(all(feature = "debug", feature = "compare", feature = "rand"))]
 mod linalg;
 
+#[cfg(all(feature = "debug", feature = "compare", feature = "rand"))]
 #[cfg(feature = "proptest-support")]
 mod proptest;
 
+//#[cfg(all(feature = "debug", feature = "compare", feature = "rand"))]
 //#[cfg(feature = "sparse")]
 //mod sparse;