diff options
| author | Benoit Daloze <[email protected]> | 2023-04-25 17:04:25 +0200 |
|---|---|---|
| committer | Benoit Daloze <[email protected]> | 2023-04-25 17:09:53 +0200 |
| commit | d562663e4098801c1d7fa7c64a335ea71231a598 (patch) | |
| tree | 5b2ab2c9fbb86b4223263485fc5a3224562ae78d /spec/ruby/language/variables_spec.rb | |
| parent | d3da01cd110ca99dd0249ee9af92e12cf845998c (diff) | |
Update to ruby/spec@7f69c86
Diffstat (limited to 'spec/ruby/language/variables_spec.rb')
| -rw-r--r-- | spec/ruby/language/variables_spec.rb | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/spec/ruby/language/variables_spec.rb b/spec/ruby/language/variables_spec.rb index c900c03d37..cd862727ac 100644 --- a/spec/ruby/language/variables_spec.rb +++ b/spec/ruby/language/variables_spec.rb @@ -1,6 +1,86 @@ require_relative '../spec_helper' require_relative 'fixtures/variables' +describe "Evaluation order during assignment" do + context "with single assignment" do + it "evaluates from left to right" do + obj = VariablesSpecs::EvalOrder.new + obj.instance_eval do + foo[0] = a + end + + obj.order.should == ["foo", "a", "foo[]="] + end + end + + context "with multiple assignment" do + ruby_version_is ""..."3.1" do + it "does not evaluate from left to right" do + obj = VariablesSpecs::EvalOrder.new + + obj.instance_eval do + foo[0], bar.baz = a, b + end + + obj.order.should == ["a", "b", "foo", "foo[]=", "bar", "bar.baz="] + end + + it "cannot be used to swap variables with nested method calls" do + node = VariablesSpecs::EvalOrder.new.node + + original_node = node + original_node_left = node.left + original_node_left_right = node.left.right + + node.left, node.left.right, node = node.left.right, node, node.left + # Should evaluate in the order of: + # RHS: node.left.right, node, node.left + # LHS: + # * node(original_node), original_node.left = original_node_left_right + # * node(original_node), node.left(changed in the previous assignment to original_node_left_right), + # original_node_left_right.right = original_node + # * node = original_node_left + + node.should == original_node_left + node.right.should_not == original_node + node.right.left.should_not == original_node_left_right + end + end + + ruby_version_is "3.1" do + it "evaluates from left to right, receivers first then methods" do + obj = VariablesSpecs::EvalOrder.new + obj.instance_eval do + foo[0], bar.baz = a, b + end + + obj.order.should == ["foo", "bar", "a", "b", "foo[]=", "bar.baz="] + end + + it "can be used to swap variables with nested method calls" do + node = VariablesSpecs::EvalOrder.new.node + + original_node = node + original_node_left = node.left + original_node_left_right = node.left.right + + node.left, node.left.right, node = node.left.right, node, node.left + # Should evaluate in the order of: + # LHS: node, node.left(original_node_left) + # RHS: original_node_left_right, original_node, original_node_left + # Ops: + # * node(original_node), original_node.left = original_node_left_right + # * original_node_left.right = original_node + # * node = original_node_left + + node.should == original_node_left + node.right.should == original_node + node.right.left.should == original_node_left_right + end + end + end +end + describe "Multiple assignment" do context "with a single RHS value" do it "assigns a simple MLHS" do |