replace rspec with minitest

Rakefile

@@ -1,13 +1,8 @@
-require "bundler/gem_tasks"
-require "rake/extensiontask"
-require 'rspec/core/rake_task'
+require 'bundler/gem_tasks'
+require 'rake/extensiontask'
+require 'rake/testtask'
 
-RSpec::Core::RakeTask.new(:spec)
-Rake::ExtensionTask.new("jaro_winkler") do |ext|
-  ext.lib_dir = "lib/jaro_winkler"
-end
-
-task default: [:compile, :spec]
+task default: [:compile, :test]
 
 task benchmark: %w[benchmark:native benchmark:pure]
 
@@ -52,4 +47,14 @@ task compare: :compile do
     end
   end
   table.each{|row| puts row.join(' | ')}
+end
+
+Rake::ExtensionTask.new('jaro_winkler') do |ext|
+  ext.lib_dir = 'lib/jaro_winkler'
+end
+
+Rake::TestTask.new do |t|
+  t.libs << 'test'
+  t.test_files = FileList['test/**/test_*.rb']
+  t.verbose = true
 end

ext/jaro_winkler/jaro_winkler.c

@@ -1,11 +1,16 @@
 #include "ruby.h"
 #include "jaro.h"
 
-VALUE rb_mJaroWinkler;
+VALUE rb_mJaroWinkler,
+      rb_eError,
+      rb_eInvalidWeightError;
+
 VALUE distance(int argc, VALUE *argv, VALUE self);
 
 void Init_jaro_winkler(void){
   rb_mJaroWinkler = rb_define_module("JaroWinkler");
+  rb_eError = rb_define_class_under(rb_mJaroWinkler, "Error", rb_eRuntimeError);
+  rb_eInvalidWeightError = rb_define_class_under(rb_mJaroWinkler, "InvalidWeightError", rb_eError);
   rb_define_module_function(rb_mJaroWinkler, "c_distance", distance, -1);
 }
 
@@ -19,7 +24,7 @@ VALUE distance(int argc, VALUE *argv, VALUE self){
           ignore_case = rb_hash_aref(opt, ID2SYM(rb_intern("ignore_case"))),
           adj_table = rb_hash_aref(opt, ID2SYM(rb_intern("adj_table")));
     if(!NIL_P(weight)) c_opt.weight = NUM2DBL(weight);
-    if(c_opt.weight > 0.25) rb_raise(rb_eRuntimeError, "Scaling factor should not exceed 0.25, otherwise the distance can become larger than 1.");
+    if(c_opt.weight > 0.25) rb_raise(rb_eInvalidWeightError, "Scaling factor should not exceed 0.25, otherwise the distance can become larger than 1.");
     if(!NIL_P(threshold)) c_opt.threshold = NUM2DBL(threshold);
     if(!NIL_P(ignore_case)) c_opt.ignore_case = (TYPE(ignore_case) == T_FALSE || NIL_P(ignore_case)) ? 0 : 1;
     if(!NIL_P(adj_table)) c_opt.adj_table = (TYPE(adj_table) == T_FALSE || NIL_P(adj_table)) ? 0 : 1;

jaro_winkler.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", "~> 1.7"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rake-compiler"
-  spec.add_development_dependency "rspec"
+  spec.add_development_dependency "minitest"
   spec.add_development_dependency "fuzzy-string-match"
   spec.add_development_dependency "hotwater"
   spec.add_development_dependency "amatch"

test/test_jaro_winkler.rb

@@ -0,0 +1,70 @@
+require 'minitest/autorun'
+require 'jaro_winkler'
+
+class TestJaroWinkler < Minitest::Test
+  def test_distance
+    assert_distance 0.9667, 'henka',       'henkan'
+    assert_distance 1.0,    'al',          'al'
+    assert_distance 0.9611, 'martha',      'marhta'
+    assert_distance 0.8324, 'jones',       'johnson'
+    assert_distance 0.9583, 'abcvwxyz',    'cabvwxyz'
+    assert_distance 0.8400, 'dwayne',      'duane'
+    assert_distance 0.8133, 'dixon',       'dicksonx'
+    assert_distance 0.0,    'fvie',        'ten'
+    assert_distance 1.0,    'tony',        'tony'
+    assert_distance 1.0,    'tonytonyjan', 'tonytonyjan'
+    assert_distance 1.0,    'x',           'x'
+    assert_distance 0.0,    '',            ''
+    assert_distance 0.0,    'tony',        ''
+    assert_distance 0.0,    '',            'tony'
+    assert_distance 0.8727, 'tonytonyjan', 'tony'
+    assert_distance 0.8727, 'tony',        'tonytonyjan'
+  end
+
+  def test_unicode
+    assert_distance 0.9818, '變形金剛4:絕跡重生', '變形金剛4: 絕跡重生'
+    assert_distance 0.8222, '連勝文',             '連勝丼'
+    assert_distance 0.8222, '馬英九',             '馬英丸'
+    assert_distance 0.6667, '良い',               'いい'
+  end
+
+  def test_ignore_case
+    assert_distance 0.9611, 'MARTHA', 'marhta', ignore_case: true
+  end
+
+  def test_weight
+    assert_distance 0.9778, 'MARTHA', 'MARHTA', weight: 0.2
+  end
+
+  def test_threshold
+    assert_distance 0.9444, 'MARTHA', 'MARHTA', threshold: 0.99
+  end
+
+
+  def test_adjusting_table
+    assert_distance 0.9667, 'HENKA', 'HENKAN', adj_table: true
+    assert_distance 1.0, 'AL', 'AL', adj_table: true
+    assert_distance 0.9611, 'MARTHA', 'MARHTA', adj_table: true
+    assert_distance 0.8598, 'JONES', 'JOHNSON', adj_table: true
+    assert_distance 0.9583, 'ABCVWXYZ', 'CABVWXYZ', adj_table: true
+    assert_distance 0.8730, 'DWAYNE', 'DUANE', adj_table: true
+    assert_distance 0.8393, 'DIXON', 'DICKSONX', adj_table: true
+    assert_distance 0.0, 'FVIE', 'TEN', adj_table: true
+  end
+
+  def test_error
+    assert_raises JaroWinkler::InvalidWeightError do
+      JaroWinkler.distance 'MARTHA', 'MARHTA', weight: 0.26
+    end
+  end
+
+  def test_long_string
+    JaroWinkler.distance 'haisai' * 20, 'haisai' * 20
+  end
+
+private
+
+  def assert_distance score, str1, str2, **options
+    assert_equal score, JaroWinkler.distance(str1, str2, **options).round(4)
+  end
+end