summaryrefslogtreecommitdiff
path: root/spec/ruby/language/numbered_parameters_spec.rb
diff options
context:
space:
mode:
Diffstat (limited to 'spec/ruby/language/numbered_parameters_spec.rb')
-rw-r--r--spec/ruby/language/numbered_parameters_spec.rb174
1 files changed, 86 insertions, 88 deletions
diff --git a/spec/ruby/language/numbered_parameters_spec.rb b/spec/ruby/language/numbered_parameters_spec.rb
index cd1ddf4555..06f9948c58 100644
--- a/spec/ruby/language/numbered_parameters_spec.rb
+++ b/spec/ruby/language/numbered_parameters_spec.rb
@@ -1,106 +1,104 @@
require_relative '../spec_helper'
-ruby_version_is "2.7" do
- describe "Numbered parameters" do
- it "provides default parameters _1, _2, ... in a block" do
- -> { _1 }.call("a").should == "a"
- proc { _1 }.call("a").should == "a"
- lambda { _1 }.call("a").should == "a"
- ["a"].map { _1 }.should == ["a"]
- end
+describe "Numbered parameters" do
+ it "provides default parameters _1, _2, ... in a block" do
+ -> { _1 }.call("a").should == "a"
+ proc { _1 }.call("a").should == "a"
+ lambda { _1 }.call("a").should == "a"
+ ["a"].map { _1 }.should == ["a"]
+ end
- it "assigns nil to not passed parameters" do
- proc { [_1, _2] }.call("a").should == ["a", nil]
- proc { [_1, _2] }.call("a", "b").should == ["a", "b"]
- end
+ it "assigns nil to not passed parameters" do
+ proc { [_1, _2] }.call("a").should == ["a", nil]
+ proc { [_1, _2] }.call("a", "b").should == ["a", "b"]
+ end
- it "supports variables _1-_9 only for the first 9 passed parameters" do
- block = proc { [_1, _2, _3, _4, _5, _6, _7, _8, _9] }
- result = block.call(1, 2, 3, 4, 5, 6, 7, 8, 9)
- result.should == [1, 2, 3, 4, 5, 6, 7, 8, 9]
- end
+ it "supports variables _1-_9 only for the first 9 passed parameters" do
+ block = proc { [_1, _2, _3, _4, _5, _6, _7, _8, _9] }
+ result = block.call(1, 2, 3, 4, 5, 6, 7, 8, 9)
+ result.should == [1, 2, 3, 4, 5, 6, 7, 8, 9]
+ end
- it "does not support more than 9 parameters" do
- -> {
- proc { [_10] }.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
- }.should raise_error(NameError, /undefined local variable or method `_10'/)
- end
+ it "does not support more than 9 parameters" do
+ -> {
+ proc { [_10] }.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+ }.should raise_error(NameError, /undefined local variable or method [`']_10'/)
+ end
- it "can not be used in both outer and nested blocks at the same time" do
- -> {
- eval("-> { _1; -> { _2 } }")
- }.should raise_error(SyntaxError, /numbered parameter is already used in/m)
- end
+ it "can not be used in both outer and nested blocks at the same time" do
+ -> {
+ eval("-> { _1; -> { _2 } }")
+ }.should raise_error(SyntaxError, /numbered parameter is already used in/m)
+ end
- ruby_version_is '2.7'...'3.0' do
- it "can be overwritten with local variable" do
- suppress_warning do
- eval <<~CODE
- _1 = 0
- proc { _1 }.call("a").should == 0
- CODE
- end
- end
-
- it "warns when numbered parameter is overwritten with local variable" do
- -> {
- eval("_1 = 0")
- }.should complain(/warning: `_1' is reserved for numbered parameter; consider another name/)
- end
- end
+ it "cannot be overwritten with local variable" do
+ -> {
+ eval <<~CODE
+ _1 = 0
+ proc { _1 }.call("a").should == 0
+ CODE
+ }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
+ end
- ruby_version_is '3.0' do
- it "cannot be overwritten with local variable" do
- -> {
- eval <<~CODE
- _1 = 0
- proc { _1 }.call("a").should == 0
- CODE
- }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
- end
-
- it "errors when numbered parameter is overwritten with local variable" do
- -> {
- eval("_1 = 0")
- }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
- end
- end
+ it "errors when numbered parameter is overwritten with local variable" do
+ -> {
+ eval("_1 = 0")
+ }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
+ end
- it "raises SyntaxError when block parameters are specified explicitly" do
- -> { eval("-> () { _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("-> (x) { _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ it "raises SyntaxError when block parameters are specified explicitly" do
+ -> { eval("-> () { _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ -> { eval("-> (x) { _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("proc { || _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("proc { |x| _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ -> { eval("proc { || _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ -> { eval("proc { |x| _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("lambda { || _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("lambda { |x| _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ -> { eval("lambda { || _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ -> { eval("lambda { |x| _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("['a'].map { || _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- -> { eval("['a'].map { |x| _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
- end
+ -> { eval("['a'].map { || _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ -> { eval("['a'].map { |x| _1 }") }.should raise_error(SyntaxError, /ordinary parameter is defined/)
+ end
- it "affects block arity" do
- -> { _1 }.arity.should == 1
- -> { _2 }.arity.should == 2
- -> { _3 }.arity.should == 3
- -> { _4 }.arity.should == 4
- -> { _5 }.arity.should == 5
- -> { _6 }.arity.should == 6
- -> { _7 }.arity.should == 7
- -> { _8 }.arity.should == 8
- -> { _9 }.arity.should == 9
-
- -> { _9 }.arity.should == 9
- proc { _9 }.arity.should == 9
- lambda { _9 }.arity.should == 9
+ describe "assigning to a numbered parameter" do
+ it "raises SyntaxError" do
+ -> { eval("proc { _1 = 0 }") }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
end
+ end
- it "does not work in methods" do
- obj = Object.new
- def obj.foo; _1 end
+ it "affects block arity" do
+ -> { _1 }.arity.should == 1
+ -> { _2 }.arity.should == 2
+ -> { _3 }.arity.should == 3
+ -> { _4 }.arity.should == 4
+ -> { _5 }.arity.should == 5
+ -> { _6 }.arity.should == 6
+ -> { _7 }.arity.should == 7
+ -> { _8 }.arity.should == 8
+ -> { _9 }.arity.should == 9
+
+ -> { _9 }.arity.should == 9
+ proc { _9 }.arity.should == 9
+ lambda { _9 }.arity.should == 9
+ end
- -> { obj.foo("a") }.should raise_error(ArgumentError, /wrong number of arguments/)
- end
+ it "affects block parameters" do
+ -> { _1 }.parameters.should == [[:req, :_1]]
+ -> { _2 }.parameters.should == [[:req, :_1], [:req, :_2]]
+
+ proc { _1 }.parameters.should == [[:opt, :_1]]
+ proc { _2 }.parameters.should == [[:opt, :_1], [:opt, :_2]]
+ end
+
+ it "affects binding local variables" do
+ -> { _1; binding.local_variables }.call("a").should == [:_1]
+ -> { _2; binding.local_variables }.call("a", "b").should == [:_1, :_2]
+ end
+
+ it "does not work in methods" do
+ obj = Object.new
+ def obj.foo; _1 end
+
+ -> { obj.foo("a") }.should raise_error(ArgumentError, /wrong number of arguments/)
end
end
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 04:54:27 +0000