How to use is_a method of RR.DSL Package

Best Rr_ruby code snippet using RR.DSL.is_a

spy_verification_spec.rb

Source:spy_verification_spec.rb

...55      context "when the number of times the subject received a method is not specified" do56        context "when there is a wildcard match one time" do57          it "verifies that the method with arguments was called once" do58            subject.foobar(1, 2)59            received(subject).foobar(1, is_a(Fixnum)).call60            subject.foobar(1, 2)61            expect {62              received(subject).foobar(1, is_a(Fixnum)).call63            }.to raise_error(RR::Errors::SpyVerificationErrors::InvocationCountError)64          end65        end66      end67      context "when the number of times the subject received a method is specified" do68        context "as one time" do69          it "verifies that the method with arugments was called once" do70            subject.foobar(1, 2)71            received(subject).foobar(1, is_a(Fixnum)).once.call72            subject.foobar(1, 2)73            expect {74              received(subject).foobar(1, is_a(Fixnum)).once.call75            }.to raise_error(RR::Errors::SpyVerificationErrors::InvocationCountError)76          end77        end78        context "as an at least matcher" do79          it "verifies that the method with arugments was called at least the specified number of times" do80            subject.foobar(1, is_a(Fixnum))81            expect {82              received(subject).foobar(1, is_a(Fixnum)).at_least(2).call83            }.to raise_error(RR::Errors::SpyVerificationErrors::InvocationCountError)84            subject.foobar(1, 2)85            received(subject).foobar(1, is_a(Fixnum)).at_least(2).call86            subject.foobar(1, 2)87            received(subject).foobar(1, is_a(Fixnum)).at_least(2).call88          end89        end90      end91    end92    context "when checking for ordering" do93      it "when the order is incorrect; raises an error" do94        subject.foobar(3, 4)95        subject.foobar(1, 2)96        expect {97          received(subject).foobar(1, 2).ordered.call98          received(subject).foobar(3, 4).ordered.call99        }.to raise_error(RR::Errors::SpyVerificationErrors::InvocationCountError)100      end101      it "when the order is correct; does not raise an error" do...

wildcard_matchers.rb

Source:wildcard_matchers.rb

...28matches the same things as self, so a natural way to write DivisibleBy#== is:29  class RR::WildcardMatchers::DivisibleBy30    def ==(other)31      # Ensure that other is actually a DivisibleBy32      return false unless other.is_a?(self.class)33      # Does other expect to match the same divisor we do?34      self.expected_divisor = other.expected_divisor35    end36  end37Note that this implementation of #== assumes that we've also declared38  attr_reader :expected_divisor39=== #inspect40Technically we don't have to declare DivisibleBy#inspect, since inspect is41defined for every object already.  But putting a helpful message in inspect42will make test failures much clearer, and it only takes about two seconds to43write it, so let's be nice and do so:44  class RR::WildcardMatchers::DivisibleBy45    def inspect46      "integer divisible by #{expected.divisor}"47    end48  end49Now if we run the example from above:50  mock(BananaGrabber).bunch_bananas(divisible_by(5))51and it fails, we get a helpful message saying52  bunch_bananas(integer divisible by 5)53  Called 0 times.54  Expected 1 times.55=== #wildcard_matches?(other)56wildcard_matches? is the method that actually checks the argument against the57expectation.  It should return true if other is considered to match,58false otherwise.  In the case of DivisibleBy, wildcard_matches? reads:59  class RR::WildcardMatchers::DivisibleBy60    def wildcard_matches?(other)61      # If other isn't a number, how can it be divisible by anything?62      return false unless other.is_a?(Numeric)63      # If other is in fact divisible by expected_divisor, then64      # other modulo expected_divisor should be 0.65      other % expected_divisor == 066    end67  end68=== A finishing touch: wrapping it neatly69We could stop here if we were willing to resign ourselves to using70DivisibleBy this way:71  mock(BananaGrabber).bunch_bananas(DivisibleBy.new(5))72But that's less expressive than the original:73  mock(BananaGrabber).bunch_bananas(divisible_by(5))74To be able to use the convenient divisible_by matcher rather than the uglier75DivisibleBy.new version, re-open the module RR::DSL and define divisible_by76there as a simple wrapper around DivisibleBy.new:77  module RR::DSL78    def divisible_by(expected_divisor)79      RR::WildcardMatchers::DivisibleBy.new(expected_divisor)80    end81  end82== Recap83Here's all the code for DivisibleBy in one place for easy reference:84  class RR::WildcardMatchers::DivisibleBy85    def initialize(divisor)86      @expected_divisor = divisor87    end88    def ==(other)89      # Ensure that other is actually a DivisibleBy90      return false unless other.is_a?(self.class)91      # Does other expect to match the same divisor we do?92      self.expected_divisor = other.expected_divisor93    end94    def inspect95      "integer divisible by #{expected.divisor}"96    end97    def wildcard_matches?(other)98      # If other isn't a number, how can it be divisible by anything?99      return false unless other.is_a?(Numeric)100      # If other is in fact divisible by expected_divisor, then101      # other modulo expected_divisor should be 0.102      other % expected_divisor == 0103    end104  end105  module RR::DSL106    def divisible_by(expected_divisor)107      RR::WildcardMatchers::DivisibleBy.new(expected_divisor)108    end109  end110=end111module RR::WildcardMatchers112end...

wildcard_matchers_spec.rb

Source:wildcard_matchers_spec.rb

...9      it "rr_anything returns an Anything matcher" do10        expect(rr_anything).to eq RR::WildcardMatchers::Anything.new11      end12    end13    describe "#is_a" do14      it "returns an IsA matcher" do15        expect(is_a(Integer)).to eq RR::WildcardMatchers::IsA.new(Integer)16      end17      it "rr_is_a returns an IsA matcher" do18        expect(rr_is_a(Integer)).to eq RR::WildcardMatchers::IsA.new(Integer)19      end20    end21    describe "#numeric" do22      it "returns an Numeric matcher" do23        expect(numeric).to eq RR::WildcardMatchers::Numeric.new24      end25      it "rr_numeric returns an Numeric matcher" do26        expect(rr_numeric).to eq RR::WildcardMatchers::Numeric.new27      end28    end29    describe "#boolean" do30      it "returns an Boolean matcher" do31        expect(boolean).to eq RR::WildcardMatchers::Boolean.new32      end...

is_a

Using AI Code Generation

1    mock(Foo).foo2    mock(Bar).bar3    mock(Baz).baz4    mock(Qux).qux5    mock(Test).test6    assert foo.is_a?(Foo)7    assert bar.is_a?(Bar)8    assert baz.is_a?(Baz)9    assert qux.is_a?(Qux)10    assert test.is_a?(Test)11    mock(Foo).foo12    mock(Bar).bar13    mock(Baz).baz14    mock(Qux).qux15    mock(Test).test16    stub(test).is_a?(Test) { true }17    assert test.is_a?(Test)

is_a

Using AI Code Generation

1  def foo; end2  def bar; end3    mock(Foo).foo4  def foo; end5  def bar; end6    mock.proxy(Foo).foo7  def foo; end8  def bar; end9    mock(Foo).foo10  def foo; end11  def bar; end12    stub.proxy(Foo).foo13  def foo; end14  def bar; end15    spy.proxy(Foo).foo

is_a

Using AI Code Generation

1    mock(Object).foo(is_a(String))2    Object.foo('hello')3ruby 1.8.6 (2007-09-24 patchlevel 111) [i686-darwin9.4.0]4rr (0.9.0)5test-unit (1.2.3)6rubygems-update (1.3.6)7rubygems (1.3.7)8    mock(Object).foo(is_a(String))9    Object.foo('hello')10test_is_a(TestIsA):

is_a

Using AI Code Generation

1    RR.mock(Foo).bar { 1 }2    RR.mock(Bar).bar { 2 }3    RR.mock(Baz).bar { 3 }4    RR.mock(Qux).bar { 4 }5    RR.verify { Foo.is_a?(Foo) }6    RR.verify { Bar.is_a?(Foo) }7    RR.verify { Baz.is_a?(Foo) }8    RR.verify { Qux.is_a?(Foo) }9    RR.verify { Foo.is_a?(Bar) }10    RR.verify { Bar.is_a?(Bar) }11    RR.verify { Baz.is_a?(Bar) }12    RR.verify { Qux.is_a?(Bar) }13    RR.verify { Foo.is_a?(Baz) }14    RR.verify { Bar.is_a?(Baz) }15    RR.verify { Baz.is_a?(Baz) }16    RR.verify { Qux.is_a?(Baz) }17    RR.verify { Foo.is_a?(Qux) }18    RR.verify { Bar.is_a?(Qux) }19    RR.verify { Baz.is_a?(Qux) }20    RR.verify { Qux.is_a?(Qux) }

is_a

Using AI Code Generation

1    mock(Object).new { Object.new }2    assert Object.new.is_a?(Object)3    mock(Object).new { Object.new }4    assert Object.new.is_a?(Object)

is_a

Using AI Code Generation

1    RR::DSL.is_a(A).method1.should == "method1"2    RR::DSL.is_a(B).method2.should == "method2"3    RR::DSL.is_a(C).method3.should == "method3"4    RR::DSL.is_a(D).method4.should == "method4"

is_a

Using AI Code Generation

1puts obj.is_a?(MyClass)2puts obj.is_a?(Object)3puts obj.is_a?(String)4puts obj.is_a?(Integer)5puts obj.is_a?(Array)6puts obj.is_a?(Hash)7puts obj.is_a?(Symbol)8puts obj.is_a?(NilClass)9puts obj.is_a?(TrueClass)10puts obj.is_a?(FalseClass)11puts obj.is_a?(Numeric)12puts obj.is_a?(Comparable)13puts obj.is_a?(Enumerable)14puts obj.is_a?(Kernel)15puts obj.is_a?(BasicObject)

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