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-rw-r--r--guides/source/4_2_release_notes.md30
1 files changed, 27 insertions, 3 deletions
diff --git a/guides/source/4_2_release_notes.md b/guides/source/4_2_release_notes.md
index 366d9d26b4..684bd286bc 100644
--- a/guides/source/4_2_release_notes.md
+++ b/guides/source/4_2_release_notes.md
@@ -257,7 +257,7 @@ application is using any of these spellings, you will need to update them:
* Values in attribute selectors may need to be quoted if they contain
non-alphanumeric characters.
- ```
+ ```ruby
# before
a[href=/]
a[href$=/]
@@ -272,7 +272,7 @@ application is using any of these spellings, you will need to update them:
For example:
- ``` ruby
+ ```ruby
# content: <div><i><p></i></div>
# before:
@@ -290,7 +290,7 @@ application is using any of these spellings, you will need to update them:
used to be raw (e.g. `AT&amp;T`), and now is evaluated
(e.g. `AT&T`).
- ``` ruby
+ ```ruby
# content: <p>AT&amp;T</p>
# before:
@@ -302,6 +302,30 @@ application is using any of these spellings, you will need to update them:
assert_select('p', 'AT&amp;T') # => false
```
+Furthermore substitutions have changed syntax.
+
+Now you have to use a `:match` CSS-like selector:
+
+```ruby
+assert_select ":match('id', ?)", 'comment_1'
+```
+
+Additionally Regexp substitutions look different when the assertion fails.
+Notice how `/hello/` here:
+
+```ruby
+assert_select(":match('id', ?)", /hello/)
+```
+
+becomes `"(?-mix:hello)"`:
+
+```
+Expected at least 1 element matching "div:match('id', "(?-mix:hello)")", found 0..
+Expected 0 to be >= 1.
+```
+
+See the [Rails Dom Testing](https://github.com/rails/rails-dom-testing/tree/8798b9349fb9540ad8cb9a0ce6cb88d1384a210b) documentation for more on `assert_select`.
+
Railties
--------