Add tests for promises.nfcall()

Author: mwilliamson

test/promises.tests.js

@@ -164,6 +164,37 @@ test("forEachSeries", {
     }
 });
 
+test("nfcall", {
+    "when function calls callback with error then promise is rejected": function() {
+        return promises.nfcall(function(callback) {
+            callback(new Error("failure"));
+        }).then(
+            function(result) {
+                assert.fail("Expected rejection");
+            },
+            function(error) {
+                assert.strictEqual(error.message, "failure");
+            }
+        );
+    },
+
+    "when function calls callback with value then promise is resolved": function() {
+        return promises.nfcall(function(callback) {
+            callback(null, "success");
+        }).then(function(result) {
+            assert.strictEqual(result, "success");
+        });
+    },
+
+    "function is called with passed arguments": function() {
+        return promises.nfcall(function(a, b, callback) {
+            callback(null, ["success", a, b]);
+        }, "a", "b").then(function(result) {
+            assert.deepStrictEqual(result, ["success", "a", "b"]);
+        });
+    }
+});
+
 test("props", {
     "props({}) resolve to {}": function() {
         return promises.props({}).then(function(result) {