Adds custom matchers for multiple in(ex)clude

prepares for aeolus-incubator#35 and aeolus-incubator#36

spec/support/matchers/string_matchers.rb

@@ -0,0 +1,45 @@
+RSpec::Matchers.define :include_all do |*expected|
+  include Utils::NiceJoin
+  match do |actual|
+    @missing = []
+    [ expected ].flatten.each do |expected_one|
+      @missing << expected_one unless actual.include? expected_one
+    end
+    @missing.empty?
+  end
+
+  failure_message_for_should do |actual|
+    "expected that '#{actual}' would include all of #{nice_join(expected)}\n it misses #{nice_join(@missing)}"
+  end
+
+  failure_message_for_should_not do |actual|
+    "expected that '#{actual}' would not include all of #{nice_join(expected)}\n it misses #{nice_join(@missing)}"
+  end
+
+  description do
+    "include all of #{nice_join(expected)}"
+  end
+end
+
+RSpec::Matchers.define :exclude_all do |*expected|
+  include Utils::NiceJoin
+  match do |actual|
+    @redundant = []
+    [ expected ].flatten.each do |expected_one|
+      @redundant << expected_one if actual.include? expected_one
+    end
+    @redundant.empty?
+  end
+
+  failure_message_for_should do |actual|
+    "expected that '#{actual}' would exclude all of #{nice_join(expected)}\n it contains #{nice_join(@redundant)}"
+  end
+
+  failure_message_for_should_not do |actual|
+    "expected that '#{actual}' would not exclude all of #{nice_join(expected)}\n it contains #{nice_join(@redundant)}"
+  end
+
+  description do
+    "exclude all of #{nice_join(expected)}"
+  end
+end

spec/support/utils/nice_join.rb

@@ -0,0 +1,10 @@
+module Utils
+  module NiceJoin
+    def nice_join(words, common_sep = ', ', last_sep = ' and ', quotes = "\"")
+      unless words.empty?
+        quoted_words = words.map{|word| quotes + word + quotes}
+        quoted_words[0..-2].join(common_sep) + last_sep + quoted_words.last
+      end
+    end
+  end
+end