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Diffstat (limited to 'spec/ruby/language/or_spec.rb')
-rw-r--r-- | spec/ruby/language/or_spec.rb | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/spec/ruby/language/or_spec.rb b/spec/ruby/language/or_spec.rb new file mode 100644 index 0000000000..150d693996 --- /dev/null +++ b/spec/ruby/language/or_spec.rb @@ -0,0 +1,90 @@ +require File.expand_path('../../spec_helper', __FILE__) + +describe "The || operator" do + it "evaluates to true if any of its operands are true" do + if false || true || nil + x = true + end + x.should == true + end + + it "evaluated to false if all of its operands are false" do + if false || nil + x = true + end + x.should == nil + end + + it "is evaluated before assignment operators" do + x = nil || true + x.should == true + end + + it "has a lower precedence than the && operator" do + x = 1 || false && x = 2 + x.should == 1 + end + + it "treats empty expressions as nil" do + (() || true).should be_true + (() || false).should be_false + (true || ()).should be_true + (false || ()).should be_nil + (() || ()).should be_nil + end + + it "has a higher precedence than 'break' in 'break true || false'" do + # see also 'break true or false' below + lambda { break false || true }.call.should be_true + end + + it "has a higher precedence than 'next' in 'next true || false'" do + lambda { next false || true }.call.should be_true + end + + it "has a higher precedence than 'return' in 'return true || false'" do + lambda { return false || true }.call.should be_true + end +end + +describe "The or operator" do + it "evaluates to true if any of its operands are true" do + x = nil + if false or true + x = true + end + x.should == true + end + + it "is evaluated after variables are assigned" do + x = nil or true + x.should == nil + end + + it "has a lower precedence than the || operator" do + x,y = nil + x = true || false or y = 1 + y.should == nil + end + + it "treats empty expressions as nil" do + (() or true).should be_true + (() or false).should be_false + (true or ()).should be_true + (false or ()).should be_nil + (() or ()).should be_nil + end + + it "has a lower precedence than 'break' in 'break true or false'" do + # see also 'break true || false' above + lambda { eval "break true or false" }.should raise_error(SyntaxError, /void value expression/) + end + + it "has a lower precedence than 'next' in 'next true or false'" do + lambda { eval "next true or false" }.should raise_error(SyntaxError, /void value expression/) + end + + it "has a lower precedence than 'return' in 'return true or false'" do + lambda { eval "return true or false" }.should raise_error(SyntaxError, /void value expression/) + end +end |