Run setup_schema before all tests

There are multiple tests that require schema to be compiled and
GSETTINGS_SCHEMA_DIR set, not just the one in settings.rs. The other
tests currently fail due to missing schema.

Cargo.toml

@@ -27,3 +27,6 @@ futures-util = { version = "0.3", default-features = false }
 gsettings-macro = "0.1.11"
 pulse = { package = "libpulse-binding", version = "2.26.0" }
 pulse_glib = { package = "libpulse-glib-binding", version = "2.25.1" }
+
+[dev-dependencies]
+ctor = "0.1.26"

src/main.rs

@@ -51,6 +51,10 @@ use self::{
  config::{GETTEXT_PACKAGE, LOCALEDIR, RESOURCES_FILE},
 };
 
+#[cfg(test)]
+#[macro_use]
+extern crate ctor;
+
 static THREAD_POOL: Lazy<glib::ThreadPool> = Lazy::new(|| glib::ThreadPool::shared(None).unwrap());
 
 fn main() {
@@ -72,3 +76,31 @@ fn main() {
  let app = Application::new();
  app.run();
 }
+
+#[cfg(test)]
+mod test {
+ use ctor;
+ use std::{env, process::Command};
+
+ // Run once before tests are executed.
+ #[ctor]
+ fn setup_schema() {
+ let schema_dir = concat!(env!("CARGO_MANIFEST_DIR"), "/data");
+
+ let output = Command::new("glib-compile-schemas")
+ .arg(schema_dir)
+ .output()
+ .unwrap();
+
+ if !output.status.success() {
+ panic!(
+ "Failed to compile GSchema for tests; stdout: {}; stderr: {}",
+ String::from_utf8_lossy(&output.stdout),
+ String::from_utf8_lossy(&output.stderr)
+ );
+ }
+
+ env::set_var("GSETTINGS_SCHEMA_DIR", schema_dir);
+ env::set_var("GSETTINGS_BACKEND", "memory");
+ }
+}

src/settings.rs

@@ -207,36 +207,8 @@ fn is_accessible(path: &Path) -> bool {
 mod tests {
  use super::*;
 
- use std::{env, process::Command, sync::Once};
-
- fn setup_schema() {
- static INIT: Once = Once::new();
-
- INIT.call_once(|| {
- let schema_dir = concat!(env!("CARGO_MANIFEST_DIR"), "/data");
-
- let output = Command::new("glib-compile-schemas")
- .arg(schema_dir)
- .output()
- .unwrap();
-
- if !output.status.success() {
- panic!(
- "Failed to compile GSchema for tests; stdout: {}; stderr: {}",
- String::from_utf8_lossy(&output.stdout),
- String::from_utf8_lossy(&output.stderr)
- );
- }
-
- env::set_var("GSETTINGS_SCHEMA_DIR", schema_dir);
- env::set_var("GSETTINGS_BACKEND", "memory");
- });
- }
-
  #[test]
  fn default_profile() {
- setup_schema();
-
  assert!(Settings::default().profile().is_some());
  assert!(Settings::default().profile().unwrap().supports_audio());
  }