test multiple calls to callbacks

Author: bengl

TODO.md

@@ -1,4 +1,3 @@
 * Support var args (`va_list`)
 * Test with actual threads.
-* Test that longer-lived (i.e. called more than once) callbacks work.
 * Build or recommend a library for dealing with C structs/enums/unions.

test/adder/adder.c

@@ -10,6 +10,10 @@
   void test_add_async_##t(t a, t b, void (*cb)(t)) {\
     cb(a + b);\
   }\
+  void test_add_async_twice_##t(t a, t b, void (*cb)(t)) {\
+    cb(a + b);\
+    cb(a + b);\
+  }\
 
 mk_adder(uint8_t)
 mk_adder(uint16_t)

test/test.js

@@ -10,6 +10,7 @@ const test = pitesti();
 let add;
 let addPtr;
 let addAsync;
+let addTwiceAsync;
 
 const libAdder = path.join(__dirname, 'adder', 'libadder.so');
 
@@ -34,6 +35,13 @@ test`get functions`(() => {
     'void',
     ['uint32_t', 'uint32_t', ['void', ['uint32_t']]]
   );
+
+  addTwiceAsync = getNativeFunction(
+    libAdder,
+    'test_add_async_twice_uint32_t',
+    'void',
+    ['uint32_t', 'uint32_t', ['void', ['uint32_t']]]
+  );
 });
 
 test`basic adding`(() => {
@@ -71,4 +79,14 @@ test`promisified adding`(async () => {
   assert.strictEqual(await addPromise(5, 3), 8);
 });
 
+test`calling callback more than once`((done) => {
+  let counter = 0;
+  addTwiceAsync(4, 5, (result) => {
+    assert.strictEqual(result, 9);
+    if (++counter === 2) {
+      done();
+    }
+  });
+});
+
 test();