review(neon): Add test to try_catch

Author: kjvalencik

test/dynamic/lib/functions.js

@@ -49,6 +49,12 @@ describe('JsFunction', function() {
     assert.equal(addon.call_and_catch(() => { return 42 }), 42);
   });
 
+  it('can return Rust type from cx.try_catch', function() {
+    const n = Math.random();
+    assert.strictEqual(addon.get_number_or_default(n), n);
+    assert.strictEqual(addon.get_number_or_default(), 0);
+  });
+
   it('propagates a panic with cx.try_catch', function() {
     assert.throws(function() {
       addon.panic_and_catch();

test/dynamic/native/src/js/functions.rs

@@ -118,6 +118,13 @@ pub fn call_and_catch(mut cx: FunctionContext) -> JsResult<JsValue> {
     }).unwrap_or_else(|err| err))
 }
 
+pub fn get_number_or_default(mut cx: FunctionContext) -> JsResult<JsNumber> {
+    let n = cx.try_catch(|cx| Ok(cx.argument::<JsNumber>(0)?.value()))
+        .unwrap_or(0.0);
+
+    Ok(cx.number(n))
+}
+
 pub fn panic_and_catch(mut cx: FunctionContext) -> JsResult<JsValue> {
     Ok(cx.try_catch(|_| { panic!("oh no") })
          .unwrap_or_else(|err| err))

test/dynamic/native/src/lib.rs

@@ -74,6 +74,7 @@ fn main(mut cx: ModuleContext) -> NeonResult<()> {
     cx.export_function("panic_after_throw", panic_after_throw)?;
     cx.export_function("throw_and_catch", throw_and_catch)?;
     cx.export_function("call_and_catch", call_and_catch)?;
+    cx.export_function("get_number_or_default", get_number_or_default)?;
     cx.export_function("panic_and_catch", panic_and_catch)?;
     cx.export_function("unexpected_throw_and_catch", unexpected_throw_and_catch)?;
     cx.export_function("downcast_error", downcast_error)?;

test/napi/lib/functions.js

@@ -104,6 +104,12 @@ describe('JsFunction', function() {
     assert.equal(addon.call_and_catch(() => { return 42 }), 42);
   });
 
+  it('can return Rust type from cx.try_catch', function() {
+    const n = Math.random();
+    assert.strictEqual(addon.get_number_or_default(n), n);
+    assert.strictEqual(addon.get_number_or_default(), 0);
+  });
+
   it('distinguishes calls from constructs', function() {
     assert.equal(addon.is_construct.call({}).wasConstructed, false);
     assert.equal((new addon.is_construct()).wasConstructed, true);

test/napi/src/js/functions.rs

@@ -119,6 +119,13 @@ pub fn call_and_catch(mut cx: FunctionContext) -> JsResult<JsValue> {
     }).unwrap_or_else(|err| err))
 }
 
+pub fn get_number_or_default(mut cx: FunctionContext) -> JsResult<JsNumber> {
+    let n = cx.try_catch(|cx| Ok(cx.argument::<JsNumber>(0)?.value(cx)))
+        .unwrap_or(0.0);
+
+    Ok(cx.number(n))
+}
+
 pub fn is_construct(mut cx: FunctionContext) -> JsResult<JsObject> {
     let this = cx.this();
     let construct = match cx.kind() {

test/napi/src/lib.rs

@@ -168,6 +168,7 @@ fn main(mut cx: ModuleContext) -> NeonResult<()> {
 
     cx.export_function("throw_and_catch", throw_and_catch)?;
     cx.export_function("call_and_catch", call_and_catch)?;
+    cx.export_function("get_number_or_default", get_number_or_default)?;
     cx.export_function("is_construct", is_construct)?;
 
     fn call_get_own_property_names(mut cx: FunctionContext) -> JsResult<JsArray> {