Tests

Gemfile

@@ -1,4 +1,7 @@
 source 'https://rubygems.org'
-
-# Specify your gem's dependencies in pry-nav.gemspec
 gemspec
+
+gem "test-unit"
+
+gem "pry", "~> 0.14.1"
+gem "pry-remote"

Rakefile

@@ -1,2 +1,10 @@
-#!/usr/bin/env rake
 require 'bundler/gem_tasks'
+require 'rake/testtask'
+
+task :default => :test
+
+Rake::TestTask.new(:test) do |task|
+  task.libs << 'test'
+  task.test_files = FileList['test/*_test.rb']
+  task.verbose = true
+end

pry-nav.gemspec

@@ -19,8 +19,7 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = '>= 2.1.0'
 
-  # Dependencies
   gem.required_ruby_version = '>= 1.8.7'
-  gem.add_runtime_dependency 'pry', '>= 0.9.10', '< 0.14.0'
-  gem.add_development_dependency 'pry-remote', '~> 0.1.6'
+  gem.add_runtime_dependency 'pry', '>= 0.9.10', '< 0.15'
+  gem.add_development_dependency 'rake'
 end

test/pry_nav_test.rb

@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+require ::File.expand_path("test_helper", __dir__)
+
+class PryNavTest < Test::Unit::TestCase
+  # removing color makes string matching easier
+  def setup
+    Pry.color = false
+  end
+
+  # lifted from:
+  # https://github.com/pry/pry-stack_explorer/blob/e3e6bd202e092712900f0d5f239ee21ab2f32b2b/test/support/io_utils.rb
+  def with_pry_output_captured(new_in, new_out = StringIO.new)
+    old_in = Pry.input
+    old_out = Pry.output
+
+    # direct stdout so we can test against `puts` in the method we defined above
+    old_stdout = $stdout
+    $stdout = new_out
+
+    Pry.input = new_in
+    Pry.output = new_out
+
+    begin
+      yield
+    ensure
+      Pry.input = old_in
+      Pry.output = old_out
+      $stdout = old_stdout
+    end
+
+    new_out
+  end
+
+  # `step` will step into the frames, while `next` keeps the debugging execution within the frame
+  def test_step
+    o = NavSample.new
+
+    r = with_pry_output_captured(
+      InputTester.new(
+        "step",
+
+        "step",
+        "step",
+
+        "continue"
+      )
+    ){ o.nested_bind_with_call }
+
+    # initial binding display
+    assert(r.string.include?("def nested_bind_with_call"))
+
+    # after two steps, we are in the second frame, let's make sure we get there
+    assert(r.string.include?("def nested_bind_call"))
+
+    assert(/nested_puts\n/ =~ r.string)
+    assert(/root_puts\n/ =~ r.string)
+  end
+
+  def test_next
+    o = NavSample.new
+
+    r = with_pry_output_captured(
+      InputTester.new(
+        "next",
+        "next",
+        "next",
+        "continue"
+      )
+    ){ o.nested_bind_with_call }
+
+    assert(r.string.include?("def nested_bind_with_call"))
+    refute(r.string.include?("def nested_bind_call"))
+
+    assert(/nested_puts\n/ =~ r.string)
+    assert(/root_puts\n/ =~ r.string)
+  end
+
+  def test_continue
+    o = NavSample.new
+
+    r = with_pry_output_captured(
+      InputTester.new(
+        "continue",
+      )
+    ){ o.nested_bind_with_call }
+
+    assert(r.string.include?("def nested_bind_with_call"))
+    refute(r.string.include?("def nested_bind_call"))
+
+    assert(/nested_puts\n/ =~ r.string)
+    assert(/root_puts\n/ =~ r.string)
+  end
+
+  def test_file_context
+    assert(PryNav.check_file_context(binding))
+  end
+end

test/test_helper.rb

@@ -0,0 +1,39 @@
+require 'bundler/setup'
+require 'test/unit'
+
+# lets make sure it works will all of the pry extensions
+Bundler.require
+
+class NavSample
+  def nested_bind_with_call
+    Pry.start(binding)
+    nested_bind_call
+    puts "root_puts"
+  end
+
+  def nested_bind_call
+    puts "nested_puts"
+  end
+end
+
+# lifted from:
+# https://github.com/pry/pry-stack_explorer/blob/e3e6bd202e092712900f0d5f239ee21ab2f32b2b/test/support/input_tester.rb
+
+class InputTester
+  def initialize(*actions)
+    if actions.last.is_a?(Hash) && actions.last.keys == [:history]
+      @hist = actions.pop[:history]
+    end
+
+    @orig_actions = actions.dup
+    @actions = actions
+  end
+
+  def readline(*)
+    @actions.shift.tap{ |line| @hist << line if @hist }
+  end
+
+  def rewind
+    @actions = @orig_actions.dup
+  end
+end