How to use inspect method of RR.WildcardMatchers Package

Best Rr_ruby code snippet using RR.WildcardMatchers.inspect

wildcard_matchers.rb

Source:wildcard_matchers.rb

...10To implement this, we need a class RR::WildcardMatchers::DivisibleBy with 11these instance methods:12* ==(other)13* eql?(other) (usually aliased to #==)14* inspect15* wildcard_match?(other)16and optionally, a sensible initialize method.  Let's look at each of these.17=== .initialize18Most custom wildcard matchers will want to define initialize to store19some information about just what should be matched.  DivisibleBy#initialize20might look like this:21  class RR::WildcardMatchers::DivisibleBy22    def initialize(divisor)23      @expected_divisor = divisor24    end25  end26=== #==(other)27DivisibleBy#==(other) should return true if other is a wildcard matcher that28matches the same things as self, so a natural way to write DivisibleBy#== is:29  30  class RR::WildcardMatchers::DivisibleBy31    def ==(other)32      # Ensure that other is actually a DivisibleBy33      return false unless other.is_a?(self.class)34      # Does other expect to match the same divisor we do?35      self.expected_divisor = other.expected_divisor36    end37  end38Note that this implementation of #== assumes that we've also declared39  attr_reader :expected_divisor40=== #inspect41Technically we don't have to declare DivisibleBy#inspect, since inspect is42defined for every object already.  But putting a helpful message in inspect43will make test failures much clearer, and it only takes about two seconds to44write it, so let's be nice and do so:45  class RR::WildcardMatchers::DivisibleBy46    def inspect47      "integer divisible by #{expected.divisor}"48    end49  end50Now if we run the example from above:51  mock(BananaGrabber).bunch_bananas(divisible_by(5))52and it fails, we get a helpful message saying53  bunch_bananas(integer divisible by 5)54  Called 0 times.55  Expected 1 times.56=== #wildcard_matches?(other)57wildcard_matches? is the method that actually checks the argument against the58expectation.  It should return true if other is considered to match,59false otherwise.  In the case of DivisibleBy, wildcard_matches? reads:60  class RR::WildcardMatchers::DivisibleBy61    def wildcard_matches?(other)62      # If other isn't a number, how can it be divisible by anything?63      return false unless other.is_a?(Numeric)64      # If other is in fact divisible by expected_divisor, then 65      # other modulo expected_divisor should be 0.66      other % expected_divisor == 067    end68  end69=== A finishing touch: wrapping it neatly70We could stop here if we were willing to resign ourselves to using71DivisibleBy this way:72  mock(BananaGrabber).bunch_bananas(DivisibleBy.new(5))73But that's less expressive than the original:74  mock(BananaGrabber).bunch_bananas(divisible_by(5))75To be able to use the convenient divisible_by matcher rather than the uglier76DivisibleBy.new version, re-open the module RR::Adapters::RRMethods and77define divisible_by there as a simple wrapper around DivisibleBy.new:78  module RR::Adapters::RRMethods79    def divisible_by(expected_divisor)80      RR::WildcardMatchers::DivisibleBy.new(expected_divisor)81    end82  end83== Recap84Here's all the code for DivisibleBy in one place for easy reference:85  class RR::WildcardMatchers::DivisibleBy86    def initialize(divisor)87      @expected_divisor = divisor88    end89    def ==(other)90      # Ensure that other is actually a DivisibleBy91      return false unless other.is_a?(self.class)92      # Does other expect to match the same divisor we do?93      self.expected_divisor = other.expected_divisor94    end95    def inspect96      "integer divisible by #{expected.divisor}"97    end98  99    def wildcard_matches?(other)100      # If other isn't a number, how can it be divisible by anything?101      return false unless other.is_a?(Numeric)102      # If other is in fact divisible by expected_divisor, then 103      # other modulo expected_divisor should be 0.104      other % expected_divisor == 0105    end106  end107  108  module RR::Adapters::RRMethods109    def divisible_by(expected_divisor)...

inspect

Using AI Code Generation

1puts inspect(RR::WildcardMatchers)2puts inspect(RR::WildcardMatchers)3puts inspect(RR::WildcardMatchers)4puts inspect(RR::WildcardMatchers)5puts inspect(RR::WildcardMatchers)6puts inspect(RR::WildcardMatchers)7puts inspect(RR::WildcardMatchers)

inspect

Using AI Code Generation

1    assert_equal RR::WildcardMatchers::Equal.new(1).inspect, "1"2    assert_equal RR::WildcardMatchers::NotEqual.new(1).inspect, "not 1"3    assert_equal RR::WildcardMatchers::IsA.new(String).inspect, "a kind of String"4    assert_equal RR::WildcardMatchers::NotIsA.new(String).inspect, "not a kind of String"5    assert_equal RR::WildcardMatchers::Regexp.new(/abc/).inspect, "/abc/"6    assert_equal RR::WildcardMatchers::NotRegexp.new(/abc/).inspect, "not /abc/"7    assert_equal RR::WildcardMatchers::RespondTo.new(:abc).inspect, "respond to :abc"8    assert_equal RR::WildcardMatchers::NotRespondTo.new(:abc).inspect, "not respond to :abc"9    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1).inspect, "{:a => 1}"10    assert_equal RR::WildcardMatchers::NotHashIncluding.new(:a => 1).inspect, "not {:a => 1}"11    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1, :b => 2).inspect, "{:a => 1, :b => 2}"12    assert_equal RR::WildcardMatchers::NotHashIncluding.new(:a => 1, :b => 2).inspect, "not {:a => 1, :b => 2}"13    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1, :b => 2, :c => 3).inspect, "{:a => 1, :b => 2, :c => 3}"14    assert_equal RR::WildcardMatchers::NotHashIncluding.new(:a => 1, :b => 2, :c => 3).inspect, "not {:a => 1, :b => 2, :c => 3}"15    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1, :b => 2, :c => 3, :d =>

inspect

Using AI Code Generation

1    assert_equal RR::WildcardMatchers::Equal.new(1).inspect, "1"2    assert_equal RR::WildcardMatchers::NotEqual.new(1).inspect, "not 1"3    assert_equal RR::WildcardMatchers::IsA.new(String).inspect, "a kind of String"4    assert_equal RR::WildcardMatchers::NotIsA.new(String).inspect, "not a kind of String"5    assert_equal RR::WildcardMatchers::Regexp.new(/abc/).inspect, "/abc/"6    assert_equal RR::WildcardMatchers::NotRegexp.new(/abc/).inspect, "not /abc/"7    assert_equal RR::WildcardMatchers::RespondTo.new(:abc).inspect, "respond to :abc"8    assert_equal RR::WildcardMatchers::NotRespondTo.new(:abc).inspect, "not respond to :abc"9    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1).inspect, "{:a => 1}"10    assert_equal RR::WildcardMatchers::NotHashIncluding.new(:a => 1).inspect, "not {:a => 1}"11    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1, :b => 2).inspect, "{:a => 1, :b => 2}"12    assert_equal RR::WildcardMatchers::NotHashIncluding.new(:a => 1, :b => 2).inspect, "not {:a => 1, :b => 2}"13    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1, :b => 2, :c => 3).inspect, "{:a => 1, :b => 2, :c => 3}"14    assert_equal RR::WildcardMatchers::NotHashIncluding.new(:a => 1, :b => 2, :c => 3).inspect, "not {:a => 1, :b => 2, :c => 3}"15    assert_equal RR::WildcardMatchers::HashIncluding.new(:a => 1, :b => 2, :c => 3, :d =>

inspect

Using AI Code Generation

1def method_with_wildcard_matcher(wildcard_matcher)2method_with_wildcard_matcher(wildcard_matcher)3def method_with_wildcard_matcher(wildcard_matcher)4method_with_wildcard_matcher(wildcard_matcher)5stub(double).method_name(wildcard_matcher)6double.method_name(1)

inspect

Using AI Code Generation

1def method_with_wildcard_matcher(wildcard_matcher)2method_with_wildcard_matcher(wildcard_matcher)3def method_with_wildcard_matcher(wildcard_matcher)4method_with_wildcard_matcher(wildcard_matcher)5stub(double).method_name(wildcard_matcher)6double.method_name(1)

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