test(fluent-bundle): Add integration test for NUMBER() builtin

fluent-bundle/tests/builtins.rs

@@ -0,0 +1,67 @@
+use fluent_bundle::{FluentArgs, FluentBundle, FluentResource, FluentValue};
+use fluent_syntax::ast::Pattern;
+
+#[test]
+fn test_builtin_number() {
+    // 1. Create bundle
+    let ftl_string = String::from(
+        r#"
+count = { NUMBER($num, type: "cardinal") ->
+   *[other] A
+    [one] B
+}
+order = { NUMBER($num, type: "ordinal") ->
+   *[other] {$num}th
+    [one] {$num}st
+    [two] {$num}nd
+    [few] {$num}rd
+}
+        "#,
+    );
+
+    let mut bundle = FluentBundle::default();
+    bundle
+        .add_resource(FluentResource::try_new(ftl_string).expect("Could not parse an FTL string."))
+        .expect("Failed to add FTL resources to the bundle.");
+    bundle
+        .add_builtins()
+        .expect("Failed to add builtin functions to the bundle.");
+
+    let get_val = |pattern: &Pattern<&'_ str>, num: isize| {
+        let mut args = FluentArgs::new();
+        args.set("num", FluentValue::from(num));
+        let mut errors = vec![];
+        let val = bundle.format_pattern(pattern, Some(&args), &mut errors);
+        if errors.is_empty() {
+            Ok(val.into_owned())
+        } else {
+            Err(errors)
+        }
+    };
+
+    let count = bundle
+        .get_message("count")
+        .expect("Message doesn't exist")
+        .value()
+        .expect("Message has no value");
+
+    assert_eq!(get_val(count, 0).unwrap(), "A");
+    assert_eq!(get_val(count, 1).unwrap(), "B");
+    assert_eq!(get_val(count, 2).unwrap(), "A");
+    assert_eq!(get_val(count, 12).unwrap(), "A");
+    assert_eq!(get_val(count, 15).unwrap(), "A");
+    assert_eq!(get_val(count, 123).unwrap(), "A");
+
+    let order = bundle
+        .get_message("order")
+        .expect("Message doesn't exist")
+        .value()
+        .expect("Message has no value");
+
+    assert_eq!(get_val(order, 0).unwrap(), "\u{2068}0\u{2069}th");
+    assert_eq!(get_val(order, 1).unwrap(), "\u{2068}1\u{2069}st");
+    assert_eq!(get_val(order, 2).unwrap(), "\u{2068}2\u{2069}nd");
+    assert_eq!(get_val(order, 12).unwrap(), "\u{2068}12\u{2069}th");
+    assert_eq!(get_val(order, 15).unwrap(), "\u{2068}15\u{2069}th");
+    assert_eq!(get_val(order, 123).unwrap(), "\u{2068}123\u{2069}rd");
+}