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Cheat Sheet:
Selectors * any element E an element of type E E.warning an E element whose class is "warning" (the document language specifies how class is determined). E#myid an E element with ID equal to "myid". E[foo] an E element with a "foo" attribute E[foo="bar"] an E element whose "foo" attribute value is exactly equal to "bar" E[foo~="bar"] an E element whose "foo" attribute value is a list of space-separated values, one of which is exactly equal to "bar" E[foo^="bar"] an E element whose "foo" attribute value begins exactly with the string "bar" E[foo$="bar"] an E element whose "foo" attribute value ends exactly with the string "bar" E[foo*="bar"] an E element whose "foo" attribute value contains the substring "bar" E[hreflang|="en"] an E element whose "hreflang" attribute has a hyphen-separated list of values beginning (from the left) with "en" E:root an E element, root of the document E:nth-child(n) an E element, the n-th child of its parent E:nth-last-child(n) an E element, the n-th child of its parent, counting from the last one E:nth-of-type(n) an E element, the n-th sibling of its type E:nth-last-of-type(n) an E element, the n-th sibling of its type, counting from the last one E:first-child an E element, first child of its parent E:last-child an E element, last child of its parent E:first-of-type an E element, first sibling of its type E:last-of-type an E element, last sibling of its type E:only-child an E element, only child of its parent E:only-of-type an E element, only sibling of its type E:empty an E element that has no children (including text nodes) E:not(s) an E element that does not match simple selector s E F an F element descendant of an E element E > F an F element child of an E element E + F an F element immediately preceded by an E element E ~ F an F element preceded by an E element Substitution values .? Class name #? ID attribute [foo=?] Attribute value May be string or regular expression, e.g. "[foo=?]", /bar/i assert_select(selector, equality?, message?) { |elems| ... } assert_select(element, selector, equality?, message?) { |elems| ... } Use selector to select elements from response page or first argument (element), and evalute equality test. Raises exception with message if equality test fails. Equality tests include: true At least one element found (:minimum=>1) false No element found (:count=>0) text, :text=>text All elements found have the text contents (string or regexp) n, :count=>n Exactly n elements found :minimum=>n At least n elements found :maximum=>n At most n elements found n..m Between n and m elements found If no count specified, :minimum=>1 assumed. If no count specified, default is :minimum=>1. With block, calls block with all selected elements. Calling assert_select (or any of the other functions) within that block operates on element selected by outer block. assert_select_rjs(id?) { |elems| ... } assert_select_rjs(statement, id?) { |elems| ... } assert_select_rjs(:insert, position, id?) { |elems| ... } Asserts that RJS statement updates/inserts HTML content and allows nested assertions on the content. With id, selects only RJS statement affecting elements with that id. With statement, RJS statements that :replace, :replace_html or :insert. With :insert can limit position (:before, :after, etc). assert_select_email() { |elems| ... } Assertions on the (HTML) body of the delivered e-mail. assert_select_encoded(element?) { |elems| ... } For operating on encoded HTML (e.g. RSS item description). css_select(selector) => array css_select(element, selector) => array Returns an array with selected elements (empty if no elements selected).

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