diff options
Diffstat (limited to 'spec/rubyspec/library/stringio/gets_spec.rb')
-rw-r--r-- | spec/rubyspec/library/stringio/gets_spec.rb | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/spec/rubyspec/library/stringio/gets_spec.rb b/spec/rubyspec/library/stringio/gets_spec.rb new file mode 100644 index 0000000000..307f564a6e --- /dev/null +++ b/spec/rubyspec/library/stringio/gets_spec.rb @@ -0,0 +1,238 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require "stringio" + +describe "StringIO#gets when passed [separator]" do + before :each do + @io = StringIO.new("this>is>an>example") + end + + it "returns the data read till the next occurence of the passed separator" do + @io.gets(">").should == "this>" + @io.gets(">").should == "is>" + @io.gets(">").should == "an>" + @io.gets(">").should == "example" + end + + it "sets $_ to the read content" do + @io.gets(">") + $_.should == "this>" + @io.gets(">") + $_.should == "is>" + @io.gets(">") + $_.should == "an>" + @io.gets(">") + $_.should == "example" + @io.gets(">") + $_.should be_nil + end + + it "accepts string as separator" do + @io.gets("is>") + $_.should == "this>" + @io.gets("an>") + $_.should == "is>an>" + @io.gets("example") + $_.should == "example" + @io.gets("ple") + $_.should be_nil + end + + it "updates self's lineno by one" do + @io.gets(">") + @io.lineno.should eql(1) + + @io.gets(">") + @io.lineno.should eql(2) + + @io.gets(">") + @io.lineno.should eql(3) + end + + it "returns the next paragraph when the passed separator is an empty String" do + io = StringIO.new("this is\n\nan example") + io.gets("").should == "this is\n\n" + io.gets("").should == "an example" + end + + it "returns the remaining content starting at the current position when passed nil" do + io = StringIO.new("this is\n\nan example") + io.pos = 5 + io.gets(nil).should == "is\n\nan example" + end + + it "tries to convert the passed separator to a String using #to_str" do + obj = mock('to_str') + obj.should_receive(:to_str).and_return(">") + @io.gets(obj).should == "this>" + end +end + +describe "StringIO#gets when passed no argument" do + before :each do + @io = StringIO.new("this is\nan example\nfor StringIO#gets") + end + + it "returns the data read till the next occurence of $/ or till eof" do + @io.gets.should == "this is\n" + + begin + old_sep, $/ = $/, " " + @io.gets.should == "an " + @io.gets.should == "example\nfor " + @io.gets.should == "StringIO#gets" + ensure + $/ = old_sep + end + end + + it "sets $_ to the read content" do + @io.gets + $_.should == "this is\n" + @io.gets + $_.should == "an example\n" + @io.gets + $_.should == "for StringIO#gets" + @io.gets + $_.should be_nil + end + + it "updates self's position" do + @io.gets + @io.pos.should eql(8) + + @io.gets + @io.pos.should eql(19) + + @io.gets + @io.pos.should eql(36) + end + + it "updates self's lineno" do + @io.gets + @io.lineno.should eql(1) + + @io.gets + @io.lineno.should eql(2) + + @io.gets + @io.lineno.should eql(3) + end + + it "returns nil if self is at the end" do + @io.pos = 36 + @io.gets.should be_nil + @io.gets.should be_nil + end +end + +describe "StringIO#gets when passed [limit]" do + before :each do + @io = StringIO.new("this>is>an>example") + end + + it "returns the data read until the limit is met" do + @io.gets(4).should == "this" + @io.gets(3).should == ">is" + @io.gets(5).should == ">an>e" + @io.gets(6).should == "xample" + end + + it "sets $_ to the read content" do + @io.gets(4) + $_.should == "this" + @io.gets(3) + $_.should == ">is" + @io.gets(5) + $_.should == ">an>e" + @io.gets(6) + $_.should == "xample" + @io.gets(3) + $_.should be_nil + end + + it "updates self's lineno by one" do + @io.gets(3) + @io.lineno.should eql(1) + + @io.gets(3) + @io.lineno.should eql(2) + + @io.gets(3) + @io.lineno.should eql(3) + end + + it "tries to convert the passed limit to an Integer using #to_int" do + obj = mock('to_int') + obj.should_receive(:to_int).and_return(4) + @io.gets(obj).should == "this" + end + + it "returns a blank string when passed a limit of 0" do + @io.gets(0).should == "" + end +end + +describe "StringIO#gets when passed [separator] and [limit]" do + before :each do + @io = StringIO.new("this>is>an>example") + end + + it "returns the data read until the limit is consumed or the separator is met" do + @io.gets('>', 8).should == "this>" + @io.gets('>', 2).should == "is" + @io.gets('>', 10).should == ">" + @io.gets('>', 6).should == "an>" + @io.gets('>', 5).should == "examp" + end + + it "sets $_ to the read content" do + @io.gets('>', 8) + $_.should == "this>" + @io.gets('>', 2) + $_.should == "is" + @io.gets('>', 10) + $_.should == ">" + @io.gets('>', 6) + $_.should == "an>" + @io.gets('>', 5) + $_.should == "examp" + end + + it "updates self's lineno by one" do + @io.gets('>', 3) + @io.lineno.should eql(1) + + @io.gets('>', 3) + @io.lineno.should eql(2) + + @io.gets('>', 3) + @io.lineno.should eql(3) + end + + it "tries to convert the passed separator to a String using #to_str" do + obj = mock('to_str') + obj.should_receive(:to_str).and_return('>') + @io.gets(obj, 5).should == "this>" + end + + it "does not raise TypeError if passed separator is nil" do + @io.gets(nil, 5).should == "this>" + end + + it "tries to convert the passed limit to an Integer using #to_int" do + obj = mock('to_int') + obj.should_receive(:to_int).and_return(5) + @io.gets('>', obj).should == "this>" + end +end + +describe "StringIO#gets when in write-only mode" do + it "raises an IOError" do + io = StringIO.new("xyz", "w") + lambda { io.gets }.should raise_error(IOError) + + io = StringIO.new("xyz") + io.close_read + lambda { io.gets }.should raise_error(IOError) + end +end |