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describe :module_class_eval, :shared => true do
# TODO: This should probably be replaced with a "should behave like" that uses
# the many scoping/binding specs from kernel/eval_spec, since most of those
# behaviors are the same for instance_eval. See also module_eval/class_eval.
it "evaluates a given string in the context of self" do
ModuleSpecs.send(@method, "self").should == ModuleSpecs
ModuleSpecs.send(@method, "1 + 1").should == 2
end
it "does not add defined methods to other classes" do
FalseClass.class_eval do
def foo
'foo'
end
end
lambda {42.foo}.should raise_error(NoMethodError)
end
it "defines constants in the receiver's scope" do
ModuleSpecs.send(@method, "module NewEvaluatedModule;end")
ModuleSpecs.const_defined?(:NewEvaluatedModule).should == true
end
it "evaluates a given block in the context of self" do
ModuleSpecs.send(@method) { self }.should == ModuleSpecs
ModuleSpecs.send(@method) { 1 + 1 }.should == 2
end
it "uses the optional filename and lineno parameters for error messages" do
ModuleSpecs.send(@method, "[__FILE__, __LINE__]", "test", 102).should == ["test", 102]
end
it "converts a non-string filename to a string using to_str" do
(file = mock(__FILE__)).should_receive(:to_str).and_return(__FILE__)
ModuleSpecs.send(@method, "1+1", file)
end
it "raises a TypeError when the given filename can't be converted to string using to_str" do
(file = mock('123')).should_receive(:to_str).and_return(123)
lambda { ModuleSpecs.send(@method, "1+1", file) }.should raise_error(TypeError)
end
it "converts non string eval-string to string using to_str" do
(o = mock('1 + 1')).should_receive(:to_str).and_return("1 + 1")
ModuleSpecs.send(@method, o).should == 2
end
it "raises a TypeError when the given eval-string can't be converted to string using to_str" do
o = mock('x')
lambda { ModuleSpecs.send(@method, o) }.should raise_error(TypeError)
(o = mock('123')).should_receive(:to_str).and_return(123)
lambda { ModuleSpecs.send(@method, o) }.should raise_error(TypeError)
end
it "raises an ArgumentError when no arguments and no block are given" do
lambda { ModuleSpecs.send(@method) }.should raise_error(ArgumentError)
end
it "raises an ArgumentError when more than 3 arguments are given" do
lambda {
ModuleSpecs.send(@method, "1 + 1", "some file", 0, "bogus")
}.should raise_error(ArgumentError)
end
it "raises an ArgumentError when a block and normal arguments are given" do
lambda {
ModuleSpecs.send(@method, "1 + 1") { 1 + 1 }
}.should raise_error(ArgumentError)
end
# This case was found because Rubinius was caching the compiled
# version of the string and not duping the methods within the
# eval, causing the method addition to change the static scope
# of the shared CompiledCode.
it "adds methods respecting the lexical constant scope" do
code = "def self.attribute; C; end"
a = Class.new do
self::C = "A"
end
b = Class.new do
self::C = "B"
end
a.class_eval code
b.class_eval code
a.attribute.should == "A"
b.attribute.should == "B"
end
end
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