diff options
Diffstat (limited to 'spec/ruby/core/kernel/printf_spec.rb')
-rw-r--r-- | spec/ruby/core/kernel/printf_spec.rb | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/printf_spec.rb b/spec/ruby/core/kernel/printf_spec.rb new file mode 100644 index 0000000000..b4c68fa449 --- /dev/null +++ b/spec/ruby/core/kernel/printf_spec.rb @@ -0,0 +1,34 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Kernel#printf" do + it "is a private method" do + Kernel.should have_private_instance_method(:printf) + end +end + +describe "Kernel.printf" do + + before :each do + @stdout = $stdout + @name = tmp("kernel_puts.txt") + $stdout = new_io @name + end + + after :each do + $stdout.close + $stdout = @stdout + rm_r @name + end + + it "writes to stdout when a string is the first argument" do + $stdout.should_receive(:write).with("string") + Kernel.printf("%s", "string") + end + + it "calls write on the first argument when it is not a string" do + object = mock('io') + object.should_receive(:write).with("string") + Kernel.printf(object, "%s", "string") + end +end |