diff options
| author | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-09-20 20:18:52 +0000 |
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| committer | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-09-20 20:18:52 +0000 |
| commit | 1d15d5f08032acf1b7bceacbb450d617ff6e0931 (patch) | |
| tree | a3785a79899302bc149e4a6e72f624ac27dc1f10 /spec/ruby/language/while_spec.rb | |
| parent | 75bfc6440d595bf339007f4fb280fd4d743e89c1 (diff) | |
Move spec/rubyspec to spec/ruby for consistency
* Other ruby implementations use the spec/ruby directory.
[Misc #13792] [ruby-core:82287]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'spec/ruby/language/while_spec.rb')
| -rw-r--r-- | spec/ruby/language/while_spec.rb | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/spec/ruby/language/while_spec.rb b/spec/ruby/language/while_spec.rb new file mode 100644 index 0000000000..00e948e41f --- /dev/null +++ b/spec/ruby/language/while_spec.rb @@ -0,0 +1,344 @@ +require File.expand_path('../../spec_helper', __FILE__) + +# while bool-expr [do] +# body +# end +# +# begin +# body +# end while bool-expr +# +# expr while bool-expr +describe "The while expression" do + it "runs while the expression is true" do + i = 0 + while i < 3 + i += 1 + end + i.should == 3 + end + + it "optionally takes a 'do' after the expression" do + i = 0 + while i < 3 do + i += 1 + end + + i.should == 3 + end + + it "allows body begin on the same line if do is used" do + i = 0 + while i < 3 do i += 1 + end + + i.should == 3 + end + + it "executes code in containing variable scope" do + i = 0 + while i != 1 + a = 123 + i = 1 + end + + a.should == 123 + end + + it "executes code in containing variable scope with 'do'" do + i = 0 + while i != 1 do + a = 123 + i = 1 + end + + a.should == 123 + end + + it "returns nil if ended when condition became false" do + i = 0 + while i < 3 + i += 1 + end.should == nil + end + + it "does not evaluate the body if expression is empty" do + a = [] + while () + a << :body_evaluated + end + a.should == [] + end + + it "stops running body if interrupted by break" do + i = 0 + while i < 10 + i += 1 + break if i > 5 + end + i.should == 6 + end + + it "stops running body if interrupted by break in a parenthesized element op-assign-or value" do + c = true + a = [] + while c + a[1] ||= + ( + break if c + c = false + ) + end.should be_nil + end + + it "stops running body if interrupted by break in a begin ... end element op-assign-or value" do + c = true + a = [] + while c + a[1] ||= begin + break if c + c = false + end + end.should be_nil + end + + it "stops running body if interrupted by break in a parenthesized element op-assign value" do + c = true + a = [1, 2] + while c + a[1] += + ( + break if c + c = false + ) + end.should be_nil + a.should == [1, 2] + end + + it "stops running body if interrupted by break in a begin ... end element op-assign value" do + c = true + a = [1, 2] + while c + a[1] += begin + break if c + c = false + end + end.should be_nil + a.should == [1, 2] + end + + it "stops running body if interrupted by break with unless in a parenthesized attribute op-assign-or value" do + a = mock("attribute assignment break") + a.should_receive(:m).twice.and_return(nil) + a.should_receive(:m=) + + c = d = true + while c + a.m ||= + ( + break unless d + d = false + ) + end.should be_nil + end + + it "stops running body if interrupted by break with unless in a begin ... end attribute op-assign-or value" do + a = mock("attribute assignment break") + a.should_receive(:m).twice.and_return(nil) + a.should_receive(:m=) + + c = d = true + while c + a.m ||= begin + break unless d + d = false + end + end.should be_nil + end + + it "stops running body if interrupted by break in a parenthesized attribute op-assign-or value" do + a = mock("attribute assignment break") + a.should_receive(:m).and_return(nil) + a.should_not_receive(:m=) + + c = true + while c + a.m += + ( + break if c + c = false + ) + end.should be_nil + end + + it "stops running body if interrupted by break in a begin ... end attribute op-assign-or value" do + a = mock("attribute assignment break") + a.should_receive(:m).and_return(nil) + a.should_not_receive(:m=) + + c = true + while c + a.m += begin + break if c + c = false + end + end.should be_nil + end + + it "returns value passed to break if interrupted by break" do + while true + break 123 + end.should == 123 + end + + it "returns nil if interrupted by break with no arguments" do + while true + break + end.should == nil + end + + it "skips to end of body with next" do + a = [] + i = 0 + while (i+=1)<5 + next if i==3 + a << i + end + a.should == [1, 2, 4] + end + + it "restarts the current iteration without reevaluating condition with redo" do + a = [] + i = 0 + j = 0 + while (i+=1)<3 + a << i + j+=1 + redo if j<3 + end + a.should == [1, 1, 1, 2] + end +end + +describe "The while modifier" do + it "runs preceding statement while the condition is true" do + i = 0 + i += 1 while i < 3 + i.should == 3 + end + + it "evaluates condition before statement execution" do + a = [] + i = 0 + a << i while (i+=1) < 3 + a.should == [1, 2] + end + + it "does not run preceding statement if the condition is false" do + i = 0 + i += 1 while false + i.should == 0 + end + + it "does not run preceding statement if the condition is empty" do + i = 0 + i += 1 while () + i.should == 0 + end + + it "returns nil if ended when condition became false" do + i = 0 + (i += 1 while i<10).should == nil + end + + it "returns value passed to break if interrupted by break" do + (break 123 while true).should == 123 + end + + it "returns nil if interrupted by break with no arguments" do + (break while true).should == nil + end + + it "skips to end of body with next" do + i = 0 + j = 0 + ((i+=1) == 3 ? next : j+=i) while i <= 10 + j.should == 63 + end + + it "restarts the current iteration without reevaluating condition with redo" do + i = 0 + j = 0 + (i+=1) == 4 ? redo : j+=i while (i+=1) <= 10 + j.should == 34 + end +end + +describe "The while modifier with begin .. end block" do + it "runs block while the expression is true" do + i = 0 + begin + i += 1 + end while i < 3 + + i.should == 3 + end + + it "stops running block if interrupted by break" do + i = 0 + begin + i += 1 + break if i > 5 + end while i < 10 + + i.should == 6 + end + + it "returns value passed to break if interrupted by break" do + (begin; break 123; end while true).should == 123 + end + + it "returns nil if interrupted by break with no arguments" do + (begin; break; end while true).should == nil + end + + it "runs block at least once (even if the expression is false)" do + i = 0 + begin + i += 1 + end while false + + i.should == 1 + end + + it "evaluates condition after block execution" do + a = [] + i = 0 + begin + a << i + end while (i+=1)<5 + a.should == [0, 1, 2, 3, 4] + end + + it "skips to end of body with next" do + a = [] + i = 0 + begin + next if i==3 + a << i + end while (i+=1)<5 + a.should == [0, 1, 2, 4] + end + + it "restarts the current iteration without reevaluting condition with redo" do + a = [] + i = 0 + j = 0 + begin + a << i + j+=1 + redo if j<3 + end while (i+=1)<3 + a.should == [0, 0, 0, 1, 2] + end +end |