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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Kernel#trace_var" do
before :each do
$Kernel_trace_var_global = nil
end
after :each do
untrace_var :$Kernel_trace_var_global
$Kernel_trace_var_global = nil
end
it "is a private method" do
Kernel.should have_private_instance_method(:trace_var)
end
it "hooks assignments to a global variable" do
captured = nil
trace_var :$Kernel_trace_var_global do |value|
captured = value
end
$Kernel_trace_var_global = 'foo'
captured.should == 'foo'
end
it "accepts a proc argument insted of a block" do
captured = nil
trace_var(
:$Kernel_trace_var_global,
proc {|value| captured = value})
$Kernel_trace_var_global = 'foo'
captured.should == 'foo'
end
it "raises ArgumentError if no block or proc is provided" do
lambda do
trace_var :$Kernel_trace_var_global
end.should raise_error(ArgumentError)
end
end
describe "Kernel.trace_var" do
it "needs to be reviewed for spec completeness"
end
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