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# frozen_string_literal: true
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require " livecheck/strategy "
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RSpec . describe Homebrew :: Livecheck :: Strategy :: PageMatch do
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subject ( :page_match ) { described_class }
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let ( :http_url ) { " https://brew.sh/blog/ " }
let ( :non_http_url ) { " ftp://brew.sh/ " }
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let ( :regex ) { %r{ href=.*?/homebrew[._-]v?( \ d+(?: \ . \ d+)+)/?["' >] }i }
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let ( :content ) do
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<< ~ EOS
< ! DOCTYPE html >
< html >
< head >
< meta charset = " utf-8 " >
< title > Homebrew — Homebrew < / title>
< / head>
< body >
< ul class = " posts " >
< li > < a href = " /2020/12/01/homebrew-2.6.0/ " title = " 2.6.0 " > < h2 > 2 . 6 . 0 < / h2><h3>01 Dec 2020< / h3 > < / a>< / li >
< li > < a href = " /2020/11/18/homebrew-tap-with-bottles-uploaded-to-github-releases/ " title = " Homebrew tap with bottles uploaded to GitHub Releases " > < h2 > Homebrew tap with bottles uploaded to GitHub Releases < / h2><h3>18 Nov 2020< / h3 > < / a>< / li >
< li > < a href = " /2020/09/08/homebrew-2.5.0/ " title = " 2.5.0 " > < h2 > 2 . 5 . 0 < / h2><h3>08 Sep 2020< / h3 > < / a>< / li >
< li > < a href = " /2020/06/11/homebrew-2.4.0/ " title = " 2.4.0 " > < h2 > 2 . 4 . 0 < / h2><h3>11 Jun 2020< / h3 > < / a>< / li >
< li > < a href = " /2020/05/29/homebrew-2.3.0/ " title = " 2.3.0 " > < h2 > 2 . 3 . 0 < / h2><h3>29 May 2020< / h3 > < / a>< / li >
< li > < a href = " /2019/11/27/homebrew-2.2.0/ " title = " 2.2.0 " > < h2 > 2 . 2 . 0 < / h2><h3>27 Nov 2019< / h3 > < / a>< / li >
< li > < a href = " /2019/06/14/homebrew-maintainer-meeting/ " title = " Homebrew Maintainer Meeting " > < h2 > Homebrew Maintainer Meeting < / h2><h3>14 Jun 2019< / h3 > < / a>< / li >
< li > < a href = " /2019/04/04/homebrew-2.1.0/ " title = " 2.1.0 " > < h2 > 2 . 1 . 0 < / h2><h3>04 Apr 2019< / h3 > < / a>< / li >
< li > < a href = " /2019/02/02/homebrew-2.0.0/ " title = " 2.0.0 " > < h2 > 2 . 0 . 0 < / h2><h3>02 Feb 2019< / h3 > < / a>< / li >
< li > < a href = " /2019/01/09/homebrew-1.9.0/ " title = " 1.9.0 " > < h2 > 1 . 9 . 0 < / h2><h3>09 Jan 2019< / h3 > < / a>< / li >
< / ul>
< / body>
< / html>
EOS
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end
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let ( :content_matches ) { [ " 2.6.0 " , " 2.5.0 " , " 2.4.0 " , " 2.3.0 " , " 2.2.0 " , " 2.1.0 " , " 2.0.0 " , " 1.9.0 " ] }
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let ( :find_versions_return_hash ) do
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{
matches : {
" 2.6.0 " = > Version . new ( " 2.6.0 " ) ,
" 2.5.0 " = > Version . new ( " 2.5.0 " ) ,
" 2.4.0 " = > Version . new ( " 2.4.0 " ) ,
" 2.3.0 " = > Version . new ( " 2.3.0 " ) ,
" 2.2.0 " = > Version . new ( " 2.2.0 " ) ,
" 2.1.0 " = > Version . new ( " 2.1.0 " ) ,
" 2.0.0 " = > Version . new ( " 2.0.0 " ) ,
" 1.9.0 " = > Version . new ( " 1.9.0 " ) ,
} ,
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regex : ,
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url : http_url ,
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}
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end
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let ( :find_versions_cached_return_hash ) do
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return_hash = find_versions_return_hash
return_hash [ :cached ] = true
return_hash
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end
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describe " ::match? " do
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it " returns true for an HTTP URL " do
expect ( page_match . match? ( http_url ) ) . to be true
end
it " returns false for a non-HTTP URL " do
expect ( page_match . match? ( non_http_url ) ) . to be false
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end
end
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describe " ::versions_from_content " do
it " returns an empty array if content is blank " do
expect ( page_match . versions_from_content ( " " , regex ) ) . to eq ( [ ] )
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end
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it " returns an array of version strings when given content " do
expect ( page_match . versions_from_content ( content , regex ) ) . to eq ( content_matches )
# Regexes should use a capture group around the version but a regex
# without one should still be handled
expect ( page_match . versions_from_content ( content , / \ d+(?: \ . \ d+)+ /i ) ) . to eq ( content_matches )
end
it " returns an array of version strings when given content and a block " do
# Returning a string from block
expect ( page_match . versions_from_content ( content , regex ) { " 1.2.3 " } ) . to eq ( [ " 1.2.3 " ] )
# Returning an array of strings from block
expect ( page_match . versions_from_content ( content , regex ) { | page , regex | page . scan ( regex ) . map ( & :first ) } )
. to eq ( content_matches )
end
it " allows a nil return from a block " do
expect ( page_match . versions_from_content ( content , regex ) { next } ) . to eq ( [ ] )
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end
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it " errors on an invalid return type from a block " do
expect { page_match . versions_from_content ( content , regex ) { 123 } }
. to raise_error ( TypeError , Homebrew :: Livecheck :: Strategy :: INVALID_BLOCK_RETURN_VALUE_MSG )
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end
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end
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describe " ::find_versions? " do
it " finds versions in provided_content " do
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expect ( page_match . find_versions ( url : http_url , regex : , provided_content : content ) )
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. to eq ( find_versions_cached_return_hash )
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# NOTE: Ideally, a regex should always be provided to `#find_versions`
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# for `PageMatch` but there are currently some `livecheck` blocks in
# casks where `#regex` isn't used and the regex only exists within a
# `strategy` block. This isn't ideal but, for the moment, we allow a
# `strategy` block to act as a substitution for a regex and we need to
# test this scenario to ensure it works.
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#
# Under normal circumstances, a regex should be established in a
# `livecheck` block using `#regex` and passed into the `strategy` block
# using `do |page, regex|`. Hopefully over time we can address related
# issues and get to a point where regexes are always established using
# `#regex`.
expect ( page_match . find_versions ( url : http_url , provided_content : content ) do | page |
page . scan ( %r{ href=.*?/homebrew[._-]v?( \ d+(?: \ . \ d+)+)/?["' >] }i ) . map ( & :first )
end )
. to eq ( find_versions_cached_return_hash . merge ( { regex : nil } ) )
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end
end
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end
