test - unit - add assertRejects to test asyncFns

1 files changed, 17 insertions, 0 deletions

diff --git a/test/unit/test-utils.js b/test/unit/test-utils.js
new file mode 100644
index 000000000..7d0ae4d91
--- /dev/null
+++ b/test/unit/test-utils.js
@@ -0,0 +1,17 @@
+const assert = require('assert')
+
+module.exports = {
+  assertRejects,
+}
+
+// assert.rejects added in node v10
+async function assertRejects (asyncFn, regExp) {
+  let f = () => {}
+  try {
+    await asyncFn()
+  } catch (error) {
+    f = () => { throw error }
+  } finally {
+    assert.throws(f, regExp)
+  }
+}