[librsvg: 29/53] Better error messages when RSVG_TEST_TOLERANCE can not be parsed

[Federico Mena Quintero <federico src gnome org>]

commit cf6a4c1017046f8c9f62cd2de4a9768e4545ecad
Author: Sven Neumann <sven svenfoo org>
Date:   Sat Oct 17 09:35:48 2020 +0200

    Better error messages when RSVG_TEST_TOLERANCE can not be parsed

 librsvg_crate/tests/standalone/utils.rs | 7 +++++--
 tests/build.rs                          | 8 +++++---
 tests/src/reference.rs                  | 7 +++++--
 3 files changed, 15 insertions(+), 7 deletions(-)
---
diff --git a/librsvg_crate/tests/standalone/utils.rs b/librsvg_crate/tests/standalone/utils.rs
index b71aaa27..f3b89c8a 100644
--- a/librsvg_crate/tests/standalone/utils.rs
+++ b/librsvg_crate/tests/standalone/utils.rs
@@ -53,8 +53,11 @@ fn tolerable_difference() -> u8 {
     static ONCE: Once = Once::new();
     ONCE.call_once(|| unsafe {
         if let Ok(str) = env::var("RSVG_TEST_TOLERANCE") {
-            let value: usize = str.parse().unwrap();
-            TOLERANCE = u8::try_from(value).unwrap();
+            let value: usize = str
+                .parse()
+                .expect("Can not parse RSVG_TEST_TOLERANCE as a number");
+            TOLERANCE =
+                u8::try_from(value).expect("RSVG_TEST_TOLERANCE should be between 0 and 255");
         }
     });
 
diff --git a/tests/build.rs b/tests/build.rs
index c19c5c30..ab8c0197 100644
--- a/tests/build.rs
+++ b/tests/build.rs
@@ -1,11 +1,13 @@
-use pkg_config;
-
 fn main() {
     check_for_pangoft2();
 }
 
 fn check_for_pangoft2() {
-    if pkg_config::Config::new().atleast_version("1.38").probe("pangoft2").is_ok() {
+    if pkg_config::Config::new()
+        .atleast_version("1.38")
+        .probe("pangoft2")
+        .is_ok()
+    {
         println!("cargo:rustc-cfg=have_pangoft2");
     }
 }
diff --git a/tests/src/reference.rs b/tests/src/reference.rs
index 3d2759e1..9011133d 100644
--- a/tests/src/reference.rs
+++ b/tests/src/reference.rs
@@ -211,8 +211,11 @@ mod duplicated_from_librsvg_crate {
         static ONCE: Once = Once::new();
         ONCE.call_once(|| unsafe {
             if let Ok(str) = env::var("RSVG_TEST_TOLERANCE") {
-                let value: usize = str.parse().unwrap();
-                TOLERANCE = u8::try_from(value).unwrap();
+                let value: usize = str
+                    .parse()
+                    .expect("Can not parse RSVG_TEST_TOLERANCE as a number");
+                TOLERANCE =
+                    u8::try_from(value).expect("RSVG_TEST_TOLERANCE should be between 0 and 255");
             }
         });