require_relative '../spec_helper' require_relative 'fixtures/send' # Why so many fixed arg tests? JRuby and I assume other Ruby impls have # separate call paths for simple fixed arity methods. Testing up to five # will verify special and generic arity code paths for all impls. # # Method naming conventions: # M - Mandatory Args # O - Optional Arg # R - Rest Arg # Q - Post Mandatory Args specs = LangSendSpecs describe "Invoking a method" do describe "with zero arguments" do it "requires no arguments passed" do specs.fooM0.should == 100 end it "raises ArgumentError if the method has a positive arity" do -> { specs.fooM1 }.should raise_error(ArgumentError) end end describe "with only mandatory arguments" do it "requires exactly the same number of passed values" do specs.fooM1(1).should == [1] specs.fooM2(1,2).should == [1,2] specs.fooM3(1,2,3).should == [1,2,3] specs.fooM4(1,2,3,4).should == [1,2,3,4] specs.fooM5(1,2,3,4,5).should == [1,2,3,4,5] end it "raises ArgumentError if the methods arity doesn't match" do -> { specs.fooM1(1,2) }.should raise_error(ArgumentError) end end describe "with optional arguments" do it "uses the optional argument if none is is passed" do specs.fooM0O1.should == [1] end it "uses the passed argument if available" do specs.fooM0O1(2).should == [2] end it "raises ArgumentError if extra arguments are passed" do -> { specs.fooM0O1(2,3) }.should raise_error(ArgumentError) end end describe "with mandatory and optional arguments" do it "uses the passed values in left to right order" do specs.fooM1O1(2).should == [2,1] end it "raises an ArgumentError if there are no values for the mandatory args" do -> { specs.fooM1O1 }.should raise_error(ArgumentError) end it "raises an ArgumentError if too many values are passed" do -> { specs.fooM1O1(1,2,3) }.should raise_error(ArgumentError) end end describe "with a rest argument" do it "is an empty array if there are no additional arguments" do specs.fooM0R().should == [] specs.fooM1R(1).should == [1, []] end it "gathers unused arguments" do specs.fooM0R(1).should == [1] specs.fooM1R(1,2).should == [1, [2]] end end it "with a block makes it available to yield" do specs.oneb(10) { 200 }.should == [10,200] end it "with a block converts the block to a Proc" do prc = specs.makeproc { "hello" } prc.should be_kind_of(Proc) prc.call.should == "hello" end it "with an object as a block uses 'to_proc' for coercion" do o = LangSendSpecs::ToProc.new(:from_to_proc) specs.makeproc(&o).call.should == :from_to_proc specs.yield_now(&o).should == :from_to_proc end it "raises a SyntaxError with both a literal block and an object as block" do -> { eval "specs.oneb(10, &l){ 42 }" }.should raise_error(SyntaxError) end it "with same names as existing variables is ok" do foobar = 100 def foobar; 200; end foobar.should == 100 foobar().should == 200 end it "with splat operator makes the object the direct arguments" do a = [1,2,3] specs.fooM3(*a).should == [1,2,3] end it "without parentheses works" do (specs.fooM3 1,2,3).should == [1,2,3] end it "with a space separating method name and parenthesis treats expression in parenthesis as first argument" do specs.weird_parens().should == "55" end describe "allows []=" do before :each do @obj = LangSendSpecs::AttrSet.new end it "with *args in the [] expanded to individual arguments" do ary = [2,3] (@obj[1, *ary] = 4).should == 4 @obj.result.should == [1,2,3,4] end it "with multiple *args" do ary = [2,3] post = [4,5] (@obj[1, *ary] = *post).should == [4,5] @obj.result.should == [1,2,3,[4,5]] end it "with multiple *args and does not unwrap the last splat" do ary = [2,3] post = [4] (@obj[1, *ary] = *post).should == [4] @obj.result.should == [1,2,3,[4]] end it "with a *args and multiple rhs args" do ary = [2,3] (@obj[1, *ary] = 4, 5).should == [4,5] @obj.result.should == [1,2,3,[4,5]] end end it "passes literal hashes without curly braces as the last parameter" do specs.fooM3('abc', 456, 'rbx' => 'cool', 'specs' => 'fail sometimes', 'oh' => 'weh').should == \ ['abc', 456, {'rbx' => 'cool', 'specs' => 'fail sometimes', 'oh' => 'weh'}] end it "passes a literal hash without curly braces or parens" do (specs.fooM3 'abc', 456, 'rbx' => 'cool', 'specs' => 'fail sometimes', 'oh' => 'weh').should == \ ['abc', 456, { 'rbx' => 'cool', 'specs' => 'fail sometimes', 'oh' => 'weh'}] end it "allows to literal hashes without curly braces as the only parameter" do specs.fooM1(rbx: :cool, specs: :fail_sometimes).should == [{ rbx: :cool, specs: :fail_sometimes }] (specs.fooM1 rbx: :cool, specs: :fail_sometimes).should == [{ rbx: :cool, specs: :fail_sometimes }] end describe "when the method is not available" do it "invokes method_missing if it is defined" do o = LangSendSpecs::MethodMissing.new o.not_there(1,2) o.message.should == :not_there o.args.should == [1,2] end it "raises NameError if invoked as a vcall" do -> { no_such_method }.should raise_error NameError end it "should omit the method_missing call from the backtrace for NameError" do -> { no_such_method }.should raise_error { |e| e.backtrace.first.should_not include("method_missing") } end it "raises NoMethodError if invoked as an unambiguous method call" do -> { no_such_method() }.should raise_error NoMethodError -> { no_such_method(1,2,3) }.should raise_error NoMethodError end it "should omit the method_missing call from the backtrace for NoMethodError" do -> { no_such_method() }.should raise_error { |e| e.backtrace.first.should_not include("method_missing") } end end end describe "Invoking a public setter method" do it 'returns the set value' do klass = Class.new do def foobar=(*) 1 end end (klass.new.foobar = 'bar').should == 'bar' (klass.new.foobar = 'bar', 'baz').should == ["bar", "baz"] end end describe "Invoking []= methods" do it 'returns the set value' do klass = Class.new do def []=(*) 1 end end (klass.new[33] = 'bar').should == 'bar' (klass.new[33] = 'bar', 'baz').should == ['bar', 'baz'] (klass.new[33, 34] = 'bar', 'baz').should == ['bar', 'baz'] end end describe "Invoking a private setter method" do describe "permits self as a receiver" do it "for normal assignment" do receiver = LangSendSpecs::PrivateSetter.new receiver.call_self_foo_equals(42) receiver.foo.should == 42 end it "for multiple assignment" do receiver = LangSendSpecs::PrivateSetter.new receiver.call_self_foo_equals_masgn(42) receiver.foo.should == 42 end end end describe "Invoking a private getter method" do it "does not permit self as a receiver" do receiver = LangSendSpecs::PrivateGetter.new -> { receiver.call_self_foo }.should raise_error(NoMethodError) -> { receiver.call_self_foo_or_equals(6) }.should raise_error(NoMethodError) end end describe "Invoking a method" do describe "with required args after the rest arguments" do it "binds the required arguments first" do specs.fooM0RQ1(1).should == [[], 1] specs.fooM0RQ1(1,2).should == [[1], 2] specs.fooM0RQ1(1,2,3).should == [[1,2], 3] specs.fooM1RQ1(1,2).should == [1, [], 2] specs.fooM1RQ1(1,2,3).should == [1, [2], 3] specs.fooM1RQ1(1,2,3,4).should == [1, [2, 3], 4] specs.fooM1O1RQ1(1,2).should == [1, 9, [], 2] specs.fooM1O1RQ1(1,2,3).should == [1, 2, [], 3] specs.fooM1O1RQ1(1,2,3,4).should == [1, 2, [3], 4] specs.fooM1O1RQ2(1,2,3).should == [1, 9, [], 2, 3] specs.fooM1O1RQ2(1,2,3,4).should == [1, 2, [], 3, 4] specs.fooM1O1RQ2(1,2,3,4,5).should == [1, 2, [3], 4, 5] end end describe "with mandatory arguments after optional arguments" do it "binds the required arguments first" do specs.fooO1Q1(0,1).should == [0,1] specs.fooO1Q1(2).should == [1,2] specs.fooM1O1Q1(2,3,4).should == [2,3,4] specs.fooM1O1Q1(1,3).should == [1,2,3] specs.fooM2O1Q1(1,2,4).should == [1,2,3,4] specs.fooM2O2Q1(1,2,3,4,5).should == [1,2,3,4,5] specs.fooM2O2Q1(1,2,3,5).should == [1,2,3,4,5] specs.fooM2O2Q1(1,2,5).should == [1,2,3,4,5] specs.fooO4Q1(1,2,3,4,5).should == [1,2,3,4,5] specs.fooO4Q1(1,2,3,5).should == [1,2,3,4,5] specs.fooO4Q1(1,2,5).should == [1,2,3,4,5] specs.fooO4Q1(1,5).should == [1,2,3,4,5] specs.fooO4Q1(5).should == [1,2,3,4,5] specs.fooO4Q2(1,2,3,4,5,6).should == [1,2,3,4,5,6] specs.fooO4Q2(1,2,3,5,6).should == [1,2,3,4,5,6] specs.fooO4Q2(1,2,5,6).should == [1,2,3,4,5,6] specs.fooO4Q2(1,5,6).should == [1,2,3,4,5,6] specs.fooO4Q2(5,6).should == [1,2,3,4,5,6] end end it "with .() invokes #call" do q = proc { |z| z } q.(1).should == 1 obj = mock("paren call") obj.should_receive(:call).and_return(:called) obj.().should == :called end it "allows a vestigial trailing ',' in the arguments" do specs.fooM1(1,).should == [1] end it "with splat operator attempts to coerce it to an Array if the object respond_to?(:to_a)" do ary = [2,3,4] obj = mock("to_a") obj.should_receive(:to_a).and_return(ary).twice specs.fooM0R(*obj).should == ary specs.fooM1R(1,*obj).should == [1, ary] end it "with splat operator * and non-Array value uses value unchanged if it does not respond_to?(:to_ary)" do obj = Object.new obj.should_not respond_to(:to_a) specs.fooM0R(*obj).should == [obj] specs.fooM1R(1,*obj).should == [1, [obj]] end it "accepts additional arguments after splat expansion" do a = [1,2] specs.fooM4(*a,3,4).should == [1,2,3,4] specs.fooM4(0,*a,3).should == [0,1,2,3] end it "does not expand final array arguments after a splat expansion" do a = [1, 2] specs.fooM3(*a, [3, 4]).should == [1, 2, [3, 4]] end it "accepts final explicit literal Hash arguments after the splat" do a = [1, 2] specs.fooM0RQ1(*a, { a: 1 }).should == [[1, 2], { a: 1 }] end it "accepts final implicit literal Hash arguments after the splat" do a = [1, 2] specs.fooM0RQ1(*a, a: 1).should == [[1, 2], { a: 1 }] end it "accepts final Hash arguments after the splat" do a = [1, 2] b = { a: 1 } specs.fooM0RQ1(*a, b).should == [[1, 2], { a: 1 }] end it "accepts mandatory and explicit literal Hash arguments after the splat" do a = [1, 2] specs.fooM0RQ2(*a, 3, { a: 1 }).should == [[1, 2], 3, { a: 1 }] end it "accepts mandatory and implicit literal Hash arguments after the splat" do a = [1, 2] specs.fooM0RQ2(*a, 3, a: 1).should == [[1, 2], 3, { a: 1 }] end it "accepts mandatory and Hash arguments after the splat" do a = [1, 2] b = { a: 1 } specs.fooM0RQ2(*a, 3, b).should == [[1, 2], 3, { a: 1 }] end it "converts a final splatted explicit Hash to an Array" do a = [1, 2] specs.fooR(*a, 3, *{ a: 1 }).should == [1, 2, 3, [:a, 1]] end it "calls #to_a to convert a final splatted Hash object to an Array" do a = [1, 2] b = { a: 1 } b.should_receive(:to_a).and_return([:a, 1]) specs.fooR(*a, 3, *b).should == [1, 2, 3, :a, 1] end it "accepts multiple splat expansions in the same argument list" do a = [1,2,3] b = 7 c = mock("pseudo-array") c.should_receive(:to_a).and_return([0,0]) d = [4,5] specs.rest_len(*a,*d,6,*b).should == 7 specs.rest_len(*a,*a,*a).should == 9 specs.rest_len(0,*a,4,*5,6,7,*c,-1).should == 11 end it "expands the Array elements from the splat after executing the arguments and block if no other arguments follow the splat" do def self.m(*args, &block) [args, block] end args = [1, nil] m(*args, &args.pop).should == [[1], nil] args = [1, nil] order = [] m(*(order << :args; args), &(order << :block; args.pop)).should == [[1], nil] order.should == [:args, :block] end it "evaluates the splatted arguments before the block if there are other arguments after the splat" do def self.m(*args, &block) [args, block] end args = [1, nil] m(*args, 2, &args.pop).should == [[1, nil, 2], nil] end it "expands an array to arguments grouped in parentheses" do specs.destructure2([40,2]).should == 42 end it "expands an array to arguments grouped in parentheses and ignores any rest arguments in the array" do specs.destructure2([40,2,84]).should == 42 end it "expands an array to arguments grouped in parentheses and sets not specified arguments to nil" do specs.destructure2b([42]).should == [42, nil] end it "expands an array to arguments grouped in parentheses which in turn takes rest arguments" do specs.destructure4r([1, 2, 3]).should == [1, 2, [], 3, nil] specs.destructure4r([1, 2, 3, 4]).should == [1, 2, [], 3, 4] specs.destructure4r([1, 2, 3, 4, 5]).should == [1, 2, [3], 4, 5] end it "with optional argument(s), expands an array to arguments grouped in parentheses" do specs.destructure4o(1, [2, 3]).should == [1, 1, nil, [2, 3]] specs.destructure4o(1, [], 2).should == [1, nil, nil, 2] specs.destructure4os(1, [2, 3]).should == [1, 2, [3]] specs.destructure5o(1, [2, 3]).should == [1, 2, 1, nil, [2, 3]] specs.destructure7o(1, [2, 3]).should == [1, 2, 1, nil, 2, 3] specs.destructure7b(1, [2, 3]) do |(a,*b,c)| [a, c] end.should == [1, 3] end describe "new-style hash arguments" do describe "as the only parameter" do it "passes without curly braces" do specs.fooM1(rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == [{ rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "passes without curly braces or parens" do (specs.fooM1 rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == [{ rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "handles a hanging comma without curly braces" do specs.fooM1(abc: 123,).should == [{abc: 123}] specs.fooM1(rbx: 'cool', specs: :fail_sometimes, non_sym: 1234,).should == [{ rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end end describe "as the last parameter" do it "passes without curly braces" do specs.fooM3('abc', 123, rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == ['abc', 123, { rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "passes without curly braces or parens" do (specs.fooM3 'abc', 123, rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == ['abc', 123, { rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "handles a hanging comma without curly braces" do specs.fooM3('abc', 123, abc: 123,).should == ['abc', 123, {abc: 123}] specs.fooM3('abc', 123, rbx: 'cool', specs: :fail_sometimes, non_sym: 1234,).should == ['abc', 123, { rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end end end describe "mixed new- and old-style hash arguments" do describe "as the only parameter" do it "passes without curly braces" do specs.fooM1(rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == [{ rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "passes without curly braces or parens" do (specs.fooM1 rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == [{ rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "handles a hanging comma without curly braces" do specs.fooM1(rbx: 'cool', specs: :fail_sometimes, non_sym: 1234,).should == [{ rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end end describe "as the last parameter" do it "passes without curly braces" do specs.fooM3('abc', 123, rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == ['abc', 123, { rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "passes without curly braces or parens" do (specs.fooM3 'abc', 123, rbx: 'cool', specs: :fail_sometimes, non_sym: 1234).should == ['abc', 123, { rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end it "handles a hanging comma without curly braces" do specs.fooM3('abc', 123, rbx: 'cool', specs: :fail_sometimes, non_sym: 1234,).should == ['abc', 123, { rbx: 'cool', specs: :fail_sometimes, non_sym: 1234 }] end end end end describe "allows []= with arguments after splat" do before :each do @obj = LangSendSpecs::Attr19Set.new @ary = ["a"] end it "with *args in the [] and post args" do @obj[1,*@ary,123] = 2 @obj.result.should == [1, "a", 123, 2] end end