Migrate test from RSpec to Minitest (f5b6620 follow-up)

also some amendments

Author: ParadoxV5

spec/pipeline_spec.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+require 'minitest/autorun'
+require 'pipeline'
+describe Pipeline do
+  
+  it 'is a module that refines the Object class and only that' do
+    assert_kind_of Module, Pipeline
+    assert_equal [Object], Pipeline.refinements.map(&:refined_class)
+    assert_empty Pipeline.instance_methods
+    assert_empty Pipeline.private_instance_methods
+  end
+  using Pipeline
+  
+  describe '`#method` shorthand' do
+    it 'overrides `backticks` with a public delegate to #method or equivalent' do
+      o = Object.new
+      def o.echo = # do nothing for a phony name
+      assert_equal o.method(:echo), o.`('echo')
+      assert_equal o.method(:__id__), o.`(:__id__) 
+      pass if o.`(:initialize)
+    end
+    
+    it 'renames Object#` to Object#sys' do
+      assert_equal :`, Object.instance_method(:sys).original_name
+      random_string = Kernel.rand.to_s
+      assert_equal random_string, sys("echo #{random_string}").chomp
+    end
+  end
+  
+  it 'defines Object#then_pipe that chain-calls each of the given _ToProc’s  with the receiver as the first arg' do
+    receiver, proc_return = Object.new, Object.new
+    # It is neither required nor forbidden for `#then_pipe` to also
+    # pass their blocks to their _ToProc arg(s) (block-ception Lol)
+    a_proc = proc do|arg|
+      assert_same receiver, arg
+      proc_return
+    end
+    a_proc_like = Object.new
+    a_proc_like.define_singleton_method(:to_proc) { a_proc }
+    assert_same proc_return, receiver.then_pipe(a_proc_like)
+    receiver.then_pipe(a_proc, ->{ assert_same proc_return, _1 })
+  end
+end