SDL3 loader fix for MacOS

internal/sdl/sdl_test.go

@@ -0,0 +1,56 @@
+package sdl
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestLibraryCandidatesForOS(t *testing.T) {
+	tests := []struct {
+		name string
+		goos string
+		want []string
+	}{
+		{
+			name: "Linux",
+			goos: "linux",
+			want: []string{"libSDL3.so.0", "libSDL3.so"},
+		},
+		{
+			name: "macOS",
+			goos: "darwin",
+			want: []string{"libSDL3.0.dylib", "libSDL3.dylib"},
+		},
+		{
+			name: "Windows",
+			goos: "windows",
+			want: []string{"SDL3.dll"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := libraryCandidatesForOS(tt.goos)
+			if err != nil {
+				t.Fatalf("libraryCandidatesForOS(%q): %v", tt.goos, err)
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Fatalf("libraryCandidatesForOS(%q) = %v, want %v", tt.goos, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestLibraryCandidatesForOSRejectsUnsupportedOS(t *testing.T) {
+	got, err := libraryCandidatesForOS("plan9")
+	if err == nil {
+		t.Fatal("libraryCandidatesForOS(plan9) returned no error")
+	}
+	if got != nil {
+		t.Fatalf("libraryCandidatesForOS(plan9) = %v, want nil", got)
+	}
+	if !strings.Contains(err.Error(), `"plan9"`) {
+		t.Fatalf("error %q does not identify the unsupported OS", err)
+	}
+}