Add tests around promises.try()

1 files changed, 48 insertions, 0 deletions

diff --git a/test/promises.tests.js b/test/promises.tests.js
new file mode 100644
index 0000000..3dd24be
--- /dev/null
+++ b/test/promises.tests.js
@@ -0,0 +1,48 @@
+var assert = require("assert");
+
+var promises = require("../lib/promises");
+var test = require("./test")(module);
+
+test("try", {
+    "when function succeeds with non-promise then promise is resolved": function() {
+        return promises.try(function() {
+            return "success";
+        }).then(function(result) {
+            assert.strictEqual(result, "success");
+        });
+    },
+
+    "when function succeeds with promise then promise is resolved": function() {
+        return promises.try(function() {
+            return promises.resolve("success");
+        }).then(function(result) {
+            assert.strictEqual(result, "success");
+        });
+    },
+
+    "when function throws error then promise is rejected": function() {
+        return promises.try(function() {
+            throw new Error("failure");
+        }).then(
+            function() {
+                assert.fail("Expected rejection");
+            },
+            function(error) {
+                assert.strictEqual(error.message, "failure");
+            }
+        );
+    },
+
+    "when function fails with promise then promise is rejected": function() {
+        return promises.try(function() {
+            return promises.reject(new Error("failure"));
+        }).then(
+            function() {
+                assert.fail("Expected rejection");
+            },
+            function(error) {
+                assert.strictEqual(error.message, "failure");
+            }
+        );
+    }
+});