summaryrefslogtreecommitdiff
path: root/spec/ruby/language/pattern_matching_spec.rb
diff options
context:
space:
mode:
authorBenoit Daloze <eregontp@gmail.com>2021-10-20 21:41:46 +0200
committerBenoit Daloze <eregontp@gmail.com>2021-10-20 21:41:46 +0200
commita6c6eef04aaa075f4bbd0eef740d011737afec91 (patch)
treee8779ca2ddc044899caabca88c16abc9a9054fff /spec/ruby/language/pattern_matching_spec.rb
parent207a5a5bc13018344dc2ab7913fdcaeaeca01292 (diff)
Update to ruby/spec@d6921ef
Diffstat (limited to 'spec/ruby/language/pattern_matching_spec.rb')
-rw-r--r--spec/ruby/language/pattern_matching_spec.rb173
1 files changed, 161 insertions, 12 deletions
diff --git a/spec/ruby/language/pattern_matching_spec.rb b/spec/ruby/language/pattern_matching_spec.rb
index c6a3008458..e4abae9412 100644
--- a/spec/ruby/language/pattern_matching_spec.rb
+++ b/spec/ruby/language/pattern_matching_spec.rb
@@ -18,6 +18,63 @@ ruby_version_is "2.7" do
RUBY
end
end
+
+ describe "find pattern" do
+ it "captures preceding elements to the pattern" do
+ eval(<<~RUBY).should == [0, 1]
+ case [0, 1, 2, 3]
+ in [*pre, 2, 3]
+ pre
+ else
+ false
+ end
+ RUBY
+ end
+
+ it "captures following elements to the pattern" do
+ eval(<<~RUBY).should == [2, 3]
+ case [0, 1, 2, 3]
+ in [0, 1, *post]
+ post
+ else
+ false
+ end
+ RUBY
+ end
+
+ it "captures both preceding and following elements to the pattern" do
+ eval(<<~RUBY).should == [[0, 1], [3, 4]]
+ case [0, 1, 2, 3, 4]
+ in [*pre, 2, *post]
+ [pre, post]
+ else
+ false
+ end
+ RUBY
+ end
+
+ it "can capture the entirety of the pattern" do
+ eval(<<~RUBY).should == [0, 1, 2, 3, 4]
+ case [0, 1, 2, 3, 4]
+ in [*everything]
+ everything
+ else
+ false
+ end
+ RUBY
+ end
+
+ it "will match an empty Array-like structure" do
+ eval(<<~RUBY).should == []
+ case []
+ in [*everything]
+ everything
+ else
+ false
+ end
+ RUBY
+ end
+ end
end
it "extends case expression with case/in construction" do
@@ -41,25 +98,49 @@ ruby_version_is "2.7" do
end
describe "warning" do
- ruby_version_is ""..."3.1" do
+ before :each do
+ @experimental, Warning[:experimental] = Warning[:experimental], true
+ end
+
+ after :each do
+ Warning[:experimental] = @experimental
+ end
+
+ context 'when regular form' do
before :each do
- ruby_version_is ""..."3.0" do
- @src = 'case [0, 1]; in [a, b]; end'
- end
+ @src = 'case [0, 1]; in [a, b]; end'
+ end
- ruby_version_is "3.0" do
- @src = '[0, 1] => [a, b]'
+ ruby_version_is ""..."3.0" do
+ it "warns about pattern matching is experimental feature" do
+ -> { eval @src }.should complain(/pattern matching is experimental, and the behavior may change in future versions of Ruby!/i)
end
-
- @experimental, Warning[:experimental] = Warning[:experimental], true
end
- after :each do
- Warning[:experimental] = @experimental
+ ruby_version_is "3.0" do
+ it "does not warn about pattern matching is experimental feature" do
+ -> { eval @src }.should_not complain
+ end
end
+ end
+
+ context 'when one-line form' do
+ ruby_version_is '3.0' do
+ before :each do
+ @src = '[0, 1] => [a, b]'
+ end
+
+ ruby_version_is ""..."3.1" do
+ it "warns about pattern matching is experimental feature" do
+ -> { eval @src }.should complain(/pattern matching is experimental, and the behavior may change in future versions of Ruby!/i)
+ end
+ end
- it "warns about pattern matching is experimental feature" do
- -> { eval @src }.should complain(/pattern matching is experimental, and the behavior may change in future versions of Ruby!/i)
+ ruby_version_is "3.1" do
+ it "does not warn about pattern matching is experimental feature" do
+ -> { eval @src }.should_not complain
+ end
+ end
end
end
end
@@ -444,6 +525,28 @@ ruby_version_is "2.7" do
end
RUBY
end
+
+ it "can be used as a nested pattern" do
+ eval(<<~RUBY).should == true
+ case [[1], ["2"]]
+ in [[0] | nil, _]
+ false
+ in [[1], [1]]
+ false
+ in [[1], [2 | "2"]]
+ true
+ end
+ RUBY
+
+ eval(<<~RUBY).should == true
+ case [1, 2]
+ in [0, _] | {a: 0}
+ false
+ in {a: 1, b: 2} | [1, 2]
+ true
+ end
+ RUBY
+ end
end
describe "AS pattern" do
@@ -705,6 +808,28 @@ ruby_version_is "2.7" do
end
RUBY
end
+
+ it "can be used as a nested pattern" do
+ eval(<<~RUBY).should == true
+ case [[1], ["2"]]
+ in [[0] | nil, _]
+ false
+ in [[1], [1]]
+ false
+ in [[1], [2 | "2"]]
+ true
+ end
+ RUBY
+
+ eval(<<~RUBY).should == true
+ case [1, 2]
+ in [0, _] | {a: 0}
+ false
+ in {a: 1, b: 2} | [1, 2]
+ true
+ end
+ RUBY
+ end
end
describe "Hash pattern" do
@@ -1060,6 +1185,30 @@ ruby_version_is "2.7" do
end
RUBY
end
+
+ it "can be used as a nested pattern" do
+ eval(<<~RUBY).should == true
+ case {a: {a: 1, b: 1}, b: {a: 1, b: 2}}
+ in {a: {a: 0}}
+ false
+ in {a: {a: 1}, b: {b: 1}}
+ false
+ in {a: {a: 1}, b: {b: 2}}
+ true
+ end
+ RUBY
+
+ eval(<<~RUBY).should == true
+ case [{a: 1, b: [1]}, {a: 1, c: ["2"]}]
+ in [{a:, c:},]
+ false
+ in [{a: 1, b:}, {a: 1, c: [Integer]}]
+ false
+ in [_, {a: 1, c: [String]}]
+ true
+ end
+ RUBY
+ end
end
describe "refinements" do