diff options
Diffstat (limited to 'spec/ruby/core/basicobject/instance_eval_spec.rb')
| -rw-r--r-- | spec/ruby/core/basicobject/instance_eval_spec.rb | 203 |
1 files changed, 171 insertions, 32 deletions
diff --git a/spec/ruby/core/basicobject/instance_eval_spec.rb b/spec/ruby/core/basicobject/instance_eval_spec.rb index d3dd05b745..124d179b5a 100644 --- a/spec/ruby/core/basicobject/instance_eval_spec.rb +++ b/spec/ruby/core/basicobject/instance_eval_spec.rb @@ -7,25 +7,31 @@ describe "BasicObject#instance_eval" do end it "is a public instance method" do - BasicObject.should have_public_instance_method(:instance_eval) + BasicObject.public_instance_methods(false).should.include?(:instance_eval) end it "sets self to the receiver in the context of the passed block" do a = BasicObject.new - a.instance_eval { self }.equal?(a).should be_true + a.instance_eval { self }.equal?(a).should == true end it "evaluates strings" do a = BasicObject.new - a.instance_eval('self').equal?(a).should be_true + a.instance_eval('self').equal?(a).should == true end - it "expects a block with no arguments" do - -> { "hola".instance_eval }.should raise_error(ArgumentError) + it "raises an ArgumentError when no arguments and no block are given" do + -> { "hola".instance_eval }.should.raise(ArgumentError, "wrong number of arguments (given 0, expected 1..3)") end - it "takes no arguments with a block" do - -> { "hola".instance_eval(4, 5) {|a,b| a + b } }.should raise_error(ArgumentError) + it "raises an ArgumentError when a block and normal arguments are given" do + -> { "hola".instance_eval(4, 5) {|a,b| a + b } }.should.raise(ArgumentError, "wrong number of arguments (given 2, expected 0)") + end + + it "raises an ArgumentError when more than 3 arguments are given" do + -> { + "hola".instance_eval("1 + 1", "some file", 0, "bogus") + }.should.raise(ArgumentError, "wrong number of arguments (given 4, expected 1..3)") end it "yields the object to the block" do @@ -45,7 +51,7 @@ describe "BasicObject#instance_eval" do end end f.foo.should == 1 - -> { Object.new.foo }.should raise_error(NoMethodError) + -> { Object.new.foo }.should.raise(NoMethodError) end it "preserves self in the original block when passed a block argument" do @@ -65,9 +71,9 @@ describe "BasicObject#instance_eval" do it "binds self to the receiver" do s = "hola" - (s == s.instance_eval { self }).should be_true + (s == s.instance_eval { self }).should == true o = mock('o') - (o == o.instance_eval("self")).should be_true + (o == o.instance_eval("self")).should == true end it "executes in the context of the receiver" do @@ -78,11 +84,28 @@ describe "BasicObject#instance_eval" do end + it "uses the caller location as default location" do + f = Object.new + f.instance_eval("[__FILE__, __LINE__]").should == ["(eval at #{__FILE__}:#{__LINE__})", 1] + end + it "has access to receiver's instance variables" do BasicObjectSpecs::IVars.new.instance_eval { @secret }.should == 99 BasicObjectSpecs::IVars.new.instance_eval("@secret").should == 99 end + it "raises TypeError for frozen objects when tries to set receiver's instance variables" do + -> { nil.instance_eval { @foo = 42 } }.should.raise(FrozenError, "can't modify frozen NilClass: nil") + -> { true.instance_eval { @foo = 42 } }.should.raise(FrozenError, "can't modify frozen TrueClass: true") + -> { false.instance_eval { @foo = 42 } }.should.raise(FrozenError, "can't modify frozen FalseClass: false") + -> { 1.instance_eval { @foo = 42 } }.should.raise(FrozenError, "can't modify frozen Integer: 1") + -> { :symbol.instance_eval { @foo = 42 } }.should.raise(FrozenError, "can't modify frozen Symbol: :symbol") + + obj = Object.new + obj.freeze + -> { obj.instance_eval { @foo = 42 } }.should.raise(FrozenError) + end + it "treats block-local variables as local to the block" do prc = instance_eval <<-CODE proc do |x, prc| @@ -99,56 +122,118 @@ describe "BasicObject#instance_eval" do prc.call(false, prc).should == 1 end - it "sets class variables in the receiver" do - BasicObjectSpecs::InstEvalCVar.class_variables.should include(:@@count) - BasicObjectSpecs::InstEvalCVar.send(:class_variable_get, :@@count).should == 2 - end - it "makes the receiver metaclass the scoped class when used with a string" do obj = Object.new obj.instance_eval %{ class B; end B } - obj.singleton_class.const_get(:B).should be_an_instance_of(Class) + obj.singleton_class.const_get(:B).should.instance_of?(Class) end - it "gets constants in the receiver if a string given" do - BasicObjectSpecs::InstEvalOuter::Inner::X_BY_STR.should == 2 + describe "constants lookup when a String given" do + it "looks in the receiver singleton class first" do + receiver = BasicObjectSpecs::InstEval::Constants::ConstantInReceiverSingletonClass::ReceiverScope::Receiver.new + caller = BasicObjectSpecs::InstEval::Constants::ConstantInReceiverSingletonClass::CallerScope::Caller.new + + caller.get_constant_with_string(receiver).should == :singleton_class + end + + it "looks in the receiver class next" do + receiver = BasicObjectSpecs::InstEval::Constants::ConstantInReceiverClass::ReceiverScope::Receiver.new + caller = BasicObjectSpecs::InstEval::Constants::ConstantInReceiverClass::CallerScope::Caller.new + + caller.get_constant_with_string(receiver).should == :Receiver + end + + it "looks in the caller class next" do + receiver = BasicObjectSpecs::InstEval::Constants::ConstantInCallerClass::ReceiverScope::Receiver.new + caller = BasicObjectSpecs::InstEval::Constants::ConstantInCallerClass::CallerScope::Caller.new + + caller.get_constant_with_string(receiver).should == :Caller + end + + it "looks in the caller outer scopes next" do + receiver = BasicObjectSpecs::InstEval::Constants::ConstantInCallerOuterScopes::ReceiverScope::Receiver.new + caller = BasicObjectSpecs::InstEval::Constants::ConstantInCallerOuterScopes::CallerScope::Caller.new + + caller.get_constant_with_string(receiver).should == :CallerScope + end + + it "looks in the receiver class hierarchy next" do + receiver = BasicObjectSpecs::InstEval::Constants::ConstantInReceiverParentClass::ReceiverScope::Receiver.new + caller = BasicObjectSpecs::InstEval::Constants::ConstantInReceiverParentClass::CallerScope::Caller.new + + caller.get_constant_with_string(receiver).should == :ReceiverParent + end end it "doesn't get constants in the receiver if a block given" do - BasicObjectSpecs::InstEvalOuter::Inner::X_BY_BLOCK.should be_nil + BasicObjectSpecs::InstEvalOuter::Inner::X_BY_BLOCK.should == nil end it "raises a TypeError when defining methods on an immediate" do -> do 1.instance_eval { def foo; end } - end.should raise_error(TypeError) + end.should.raise(TypeError) -> do :foo.instance_eval { def foo; end } - end.should raise_error(TypeError) + end.should.raise(TypeError) end -quarantine! do # Not clean, leaves cvars lying around to break other specs - it "scopes class var accesses in the caller when called on a Fixnum" do - # Fixnum can take instance vars - Fixnum.class_eval "@@__tmp_instance_eval_spec = 1" - (defined? @@__tmp_instance_eval_spec).should be_nil + describe "class variables lookup" do + it "gets class variables in the caller class when called with a String" do + receiver = BasicObjectSpecs::InstEval::CVar::Get::ReceiverScope.new + caller = BasicObjectSpecs::InstEval::CVar::Get::CallerScope.new + + caller.get_class_variable_with_string(receiver).should == :value_defined_in_caller_scope + end + + it "gets class variables in the block definition scope when called with a block" do + receiver = BasicObjectSpecs::InstEval::CVar::Get::ReceiverScope.new + caller = BasicObjectSpecs::InstEval::CVar::Get::CallerScope.new + block = BasicObjectSpecs::InstEval::CVar::Get::BlockDefinitionScope.new.block + + caller.get_class_variable_with_block(receiver, block).should == :value_defined_in_block_definition_scope + end + + it "sets class variables in the caller class when called with a String" do + receiver = BasicObjectSpecs::InstEval::CVar::Set::ReceiverScope.new + caller = BasicObjectSpecs::InstEval::CVar::Set::CallerScope.new - @@__tmp_instance_eval_spec = 2 - 1.instance_eval { @@__tmp_instance_eval_spec }.should == 2 - Fixnum.__send__(:remove_class_variable, :@@__tmp_instance_eval_spec) + caller.set_class_variable_with_string(receiver, 1) + BasicObjectSpecs::InstEval::CVar::Set::CallerScope.get_class_variable.should == 1 + end + + it "sets class variables in the block definition scope when called with a block" do + receiver = BasicObjectSpecs::InstEval::CVar::Set::ReceiverScope.new + caller = BasicObjectSpecs::InstEval::CVar::Set::CallerScope.new + block = BasicObjectSpecs::InstEval::CVar::Set::BlockDefinitionScope.new.block_to_assign(1) + + caller.set_class_variable_with_block(receiver, block) + BasicObjectSpecs::InstEval::CVar::Set::BlockDefinitionScope.get_class_variable.should == 1 + end + + it "does not have access to class variables in the receiver class when called with a String" do + receiver = BasicObjectSpecs::InstEval::CVar::Get::ReceiverScope.new + caller = BasicObjectSpecs::InstEval::CVar::Get::CallerWithoutCVarScope.new + -> { caller.get_class_variable_with_string(receiver) }.should.raise(NameError, /uninitialized class variable @@cvar/) + end + + it "does not have access to class variables in the receiver's singleton class when called with a String" do + receiver = BasicObjectSpecs::InstEval::CVar::Get::ReceiverWithCVarDefinedInSingletonClass + caller = BasicObjectSpecs::InstEval::CVar::Get::CallerWithoutCVarScope.new + -> { caller.get_class_variable_with_string(receiver) }.should.raise(NameError, /uninitialized class variable @@cvar/) + end end -end it "raises a TypeError when defining methods on numerics" do -> do (1.0).instance_eval { def foo; end } - end.should raise_error(TypeError) + end.should.raise(TypeError) -> do (1 << 64).instance_eval { def foo; end } - end.should raise_error(TypeError) + end.should.raise(TypeError) end it "evaluates procs originating from methods" do @@ -185,4 +270,58 @@ end x.should == :value end + + it "converts string argument with #to_str method" do + source_code = Object.new + def source_code.to_str() "1" end + + a = BasicObject.new + a.instance_eval(source_code).should == 1 + end + + it "raises ArgumentError if returned value is not String" do + source_code = Object.new + def source_code.to_str() :symbol end + + a = BasicObject.new + -> { a.instance_eval(source_code) }.should raise_consistent_error(TypeError, /can't convert Object into String/) + end + + it "converts filename argument with #to_str method" do + filename = Object.new + def filename.to_str() "file.rb" end + + err = begin + Object.new.instance_eval("raise", filename) + rescue => e + e + end + err.backtrace.first.split(":")[0].should == "file.rb" + end + + it "raises ArgumentError if returned value is not String" do + filename = Object.new + def filename.to_str() :symbol end + + -> { Object.new.instance_eval("raise", filename) }.should raise_consistent_error(TypeError, /can't convert Object into String/) + end + + it "converts lineno argument with #to_int method" do + lineno = Object.new + def lineno.to_int() 15 end + + err = begin + Object.new.instance_eval("raise", "file.rb", lineno) + rescue => e + e + end + err.backtrace.first.split(":")[1].should == "15" + end + + it "raises ArgumentError if returned value is not Integer" do + lineno = Object.new + def lineno.to_int() :symbol end + + -> { Object.new.instance_eval("raise", "file.rb", lineno) }.should raise_consistent_error(TypeError, /can't convert Object into Integer/) + end end |