perf: refine benches and add somes test to ensure we are testing the correct inputs

benches/simple_lookup.rs

@@ -1,5 +1,6 @@
 use criterion::{
-    criterion_group, criterion_main, AxisScale, BenchmarkId, Criterion, PlotConfiguration,
+    black_box, criterion_group, criterion_main, AxisScale, BenchmarkId, Criterion,
+    PlotConfiguration,
 };
 use freedesktop_icons::lookup;
 use gtk4::{IconLookupFlags, IconTheme, TextDirection};
@@ -10,42 +11,60 @@ pub fn bench_lookups(c: &mut Criterion) {
     group.plot_config(plot_config);
 
     let args = [
-        "user-home", // (Best case) An icon that can be found in the current theme
-        "video-single-display-symbolic", // An icon that can be found in the parent theme
-        "firefox",   // An icon that can be found in the hicolor default theme
+        "user-home",      // (Best case) An icon that can be found in the current theme
+        "firefox",        // An icon that can be found in the hicolor default theme
         "archlinux-logo", // An icon that resides in /usr/share/pixmaps
-        "not-found", // (Worst case) An icon that does not exist
+        "not-found",      // (Worst case) An icon that does not exist
     ];
 
     for arg in args {
         group.bench_with_input(BenchmarkId::new("freedesktop-icons", arg), arg, |b, arg| {
-            b.iter(|| lookup(arg).with_theme("Arc").find());
+            b.iter(|| {
+                lookup(black_box(arg))
+                    .with_theme(black_box("Adwaita"))
+                    .find()
+            });
         });
 
         group.bench_with_input(
             BenchmarkId::new("freedesktop-icons-cache", arg),
             arg,
             |b, arg| {
-                b.iter(|| lookup(arg).with_theme("Arc").with_cache().find());
+                b.iter(|| {
+                    lookup(black_box(arg))
+                        .with_scale(black_box(1))
+                        .with_size(black_box(24))
+                        .with_theme(black_box("Adwaita"))
+                        .with_cache()
+                        .find()
+                });
             },
         );
 
         group.bench_with_input(BenchmarkId::new("linicon", arg), arg, |b, arg| {
-            b.iter(|| linicon::lookup_icon(arg).from_theme("Arc").next());
+            b.iter(|| {
+                linicon::lookup_icon(black_box(arg))
+                    .from_theme(black_box("Adwaita"))
+                    .with_scale(black_box(1))
+                    .with_size(black_box(24))
+                    .next()
+            });
         });
 
         group.bench_with_input(BenchmarkId::new("gtk", arg), arg, |b, arg| {
             gtk4::init().unwrap();
             let theme = IconTheme::new();
             b.iter(|| {
-                theme.lookup_icon(
-                    arg,
-                    &[],
-                    24,
-                    1,
-                    TextDirection::None,
-                    IconLookupFlags::empty(),
-                )
+                theme
+                    .lookup_icon(
+                        black_box(arg),
+                        black_box(&[]),
+                        black_box(24),
+                        black_box(1),
+                        black_box(TextDirection::None),
+                        black_box(IconLookupFlags::empty()),
+                    )
+                    .icon_name()
             });
         });
     }

benches/tests.rs

@@ -0,0 +1,106 @@
+use freedesktop_icons::lookup;
+use gtk4::{IconLookupFlags, IconTheme, TextDirection};
+use speculoos::prelude::*;
+use std::path::PathBuf;
+
+#[test]
+fn gtk_lookup() {
+    gtk4::init().unwrap();
+    let theme = IconTheme::new();
+
+    let x = theme.lookup_icon(
+        "firefox",
+        &[],
+        24,
+        1,
+        TextDirection::None,
+        IconLookupFlags::empty(),
+    );
+
+    assert!(x.icon_name().is_some())
+}
+
+// Linicon sometimes fails with theme that have unknown parents
+// This test only ensure we are running the correct function in the benchmarks
+// And results are identical.
+#[test]
+fn linicon() {
+    // Current theme
+    let lin_user_home = linicon::lookup_icon("user-home")
+        .from_theme("Adwaita")
+        .with_size(24)
+        .with_scale(1)
+        .next();
+
+    let user_home = lookup("user-home")
+        .with_theme("Adwaita")
+        .with_size(24)
+        .with_scale(1)
+        .find();
+
+    asserting!("Linicon return some icon")
+        .that(&lin_user_home.unwrap())
+        .is_ok()
+        .map(|icon| &icon.path)
+        .is_equal_to(PathBuf::from(
+            "/usr/share/icons/Adwaita/24x24/places/user-home.png",
+        ));
+
+    // Fixme
+    asserting!("Our implementation should return the same result as linicon")
+        .that(&user_home)
+        .is_some()
+        .is_equal_to(PathBuf::from(
+            "/usr/share/icons/Adwaita/24x24/places/user-home.png",
+        ));
+
+    // Fallback to hicolor
+    let lin_firefox = linicon::lookup_icon("firefox")
+        .from_theme("Adwaita")
+        .with_size(24)
+        .with_scale(1)
+        .next();
+
+    let firefox = lookup("firefox")
+        .with_theme("Adwaita")
+        .with_size(24)
+        .with_scale(1)
+        .find();
+
+    asserting!("Linicon return some icon")
+        .that(&lin_firefox.unwrap())
+        .is_ok()
+        .map(|icon| &icon.path)
+        .is_equal_to(PathBuf::from(
+            "/usr/share/icons/hicolor/22x22/apps/firefox.png",
+        ));
+
+    asserting!("Our implementation should return the same result as linicon")
+        .that(&firefox)
+        .is_some()
+        .is_equal_to(PathBuf::from(
+            "/usr/share/icons/hicolor/22x22/apps/firefox.png",
+        ));
+
+    // pixmaps
+    let lin_archlinux = linicon::lookup_icon("archlinux-logo")
+        .from_theme("Adwaita")
+        .with_size(24)
+        .with_scale(1)
+        .next();
+
+    let archlinux = lookup("archlinux-logo")
+        .with_theme("Adwaita")
+        .with_size(24)
+        .with_scale(1)
+        .find();
+
+    asserting!("Linicon fails to fallback to pixmaps")
+        .that(&lin_archlinux)
+        .is_none();
+
+    asserting!("But we succeed")
+        .that(&archlinux)
+        .is_some()
+        .is_equal_to(PathBuf::from("toto"));
+}