doc: add missing function to test common doc

Add documentation for `common.expectsError()` to `test/README.md`. PR-URL: #11382 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Gibson Fahnestock <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Joyee Cheung <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>
nodejs · Feb 22, 2017 · ef1731d · ef1731d
1 parent 5723087
commit ef1731d
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/test/README.md b/test/README.md
@@ -180,6 +180,22 @@ Platform normalizes the `dd` command
 
 Check if there is more than 1gb of total memory.
 
+### expectsError(code[, type[, message]])
+* `code` [&lt;String>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type)
+  expected error must have this value for its `code` property
+* `type` [&lt;Function>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function)
+  expected error must be an instance of `type`
+* `message` [&lt;String>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type)
+  or [&lt;RegExp>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp)
+  if a string is provided for `message`, expected error must have it for its
+  `message` property; if a regular expression is provided for `message`, the
+  regular expression must match the `message` property of the expected error
+
+* return function suitable for use as a validation function passed as the second
+  argument to `assert.throws()`
+
+The expected error should be [subclassed by the `internal/errors` module](https://github.com/nodejs/node/blob/master/doc/guides/using-internal-errors.md#api).
+
 ### expectWarning(name, expected)
 * `name` [&lt;String>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type)
 * `expected` [&lt;String>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type) | [&lt;Array>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)