1 files changed, 103 insertions, 0 deletions
diff --git a/test/knapsack_solver_matchers.rb b/test/knapsack_solver_matchers.rb
new file mode 100644
index 0000000..754fb20
--- /dev/null
+++ b/test/knapsack_solver_matchers.rb
@@ -0,0 +1,103 @@
+require 'rspec/expectations'
+
+def comment_lines(file_path)
+  File.open(file_path, 'r').each_line.select { |l| l.chars.first == '#' }
+end
+
+def data_lines(file_path)
+  File.open(file_path, 'r').each_line.select { |l| l.chars.first != '#' }
+end
+
+
+RSpec::Matchers.define :be_a_regular_file do
+  match do |actual|
+    File.file?(actual)
+  end
+end
+
+RSpec::Matchers.define :be_an_empty_directory do
+  match do |actual|
+    Dir.empty?(actual)
+  end
+end
+
+RSpec::Matchers.define :be_a_valid_results_file do
+  match do |actual|
+    begin
+      comment_lines = comment_lines(actual)
+      data_lines = data_lines(actual)
+      # It must have 3 lines: 2 comments and >= 1 data line
+      return false if comment_lines.size != 2 || data_lines.size < 1
+      # Data line must consist of non-negative numbers and array 1 and 0
+      data_lines.each do |l|
+        l.scan(/\[[^\]]*\]/).first.tr('[]', '').split(',').map { |n| n.to_i }.each do |i|
+          return false if i != 0 && i != 1
+        end
+        l.scan(/[0-9\.]+/).map { |n| n.to_f }.each do |i|
+          return false if i < 0
+        end
+      end
+      true
+    rescue
+      false
+    end
+  end
+end  
+
+RSpec::Matchers.define :be_a_equal_to_results_file do |good|
+  match do |actual|
+    begin
+      lines = data_lines(actual)
+      good_lines = data_lines(good)
+      return false if lines.size != good_lines.size
+      lines.each_with_index do |l, i|
+        # Check price and configuration
+        return false if l.split(']').first != good_lines[i].split(']').first
+        # Check relative error
+        return false if l.split().last != good_lines[i].split().last
+        return false if l.split().size != good_lines[i].split().size
+      end
+      true
+    rescue
+      false
+    end
+  end
+end
+
+RSpec::Matchers.define :be_a_equal_to_stats_file do |good|
+  match do |actual|
+    begin
+      lines = data_lines(actual)
+      good_lines = data_lines(good)
+      return false if lines.size != good_lines.size
+      lines.each_with_index do |l, i|
+        # Check average price
+        return false if l.split().first != good_lines[i].split().first
+        # Check average relative error
+        return false if l.split().last != good_lines[i].split().last
+        return false if l.split().size != good_lines[i].split().size
+      end
+      true
+    rescue
+      false
+    end
+  end
+end
+
+RSpec::Matchers.define :be_a_valid_stats_file do
+  match do |actual|
+    begin
+      comment_lines = comment_lines(actual)
+      data_lines = data_lines(actual)
+      # It must have 3 lines: 2 comments and 1 data line
+      return false if comment_lines.size != 2 || data_lines.size != 1
+      # Data line must consist of non-negative numbers
+      data_lines.first.split.map { |i| i.to_f }.each do |n|
+        return false if n < 0
+      end
+      true
+    rescue
+      false
+    end
+  end
+end