Fix various specs that were passing incorrectly

better_errors.gemspec

@@ -22,6 +22,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency "rake", "~> 10.0"
   s.add_development_dependency "rspec", "~> 3.5"
+  s.add_development_dependency "rspec-html-matchers"
   s.add_development_dependency "rspec-its"
   s.add_development_dependency "yard"
   # kramdown 2.1 requires Ruby 2.3+

spec/better_errors/error_page_spec.rb

@@ -2,6 +2,11 @@
 
 module BetterErrors
   describe ErrorPage do
+    # It's necessary to use HTML matchers here that are specific as possible.
+    # This is because if there's an exception within this file, the lines of code will be reflected in the
+    # generated HTML, so any strings being matched against the HTML content will be there if they're within 5
+    # lines of code of the exception that was raised.
+
     let!(:exception) { raise ZeroDivisionError, "you divided by zero you silly goose!" rescue $! }
 
     let(:error_page) { ErrorPage.new exception, { "PATH_INFO" => "/some/path" } }
@@ -19,44 +24,53 @@ module BetterErrors
     }
 
     it "includes the error message" do
-      expect(response).to include("you divided by zero you silly goose!")
+      expect(response).to have_tag('.exception p', text: /you divided by zero you silly goose!/)
     end
 
     it "includes the request path" do
-      expect(response).to include("/some/path")
+      expect(response).to have_tag('.exception h2', %r{/some/path})
     end
 
     it "includes the exception class" do
-      expect(response).to include("ZeroDivisionError")
+      expect(response).to have_tag('.exception h2', /ZeroDivisionError/)
     end
 
     context "variable inspection" do
       let(:exception) { exception_binding.eval("raise") rescue $! }
 
-      if BetterErrors.binding_of_caller_available?
+      context "when binding_of_caller is loaded" do
+        before do
+          skip "binding_of_caller is not loaded" unless BetterErrors.binding_of_caller_available?
+        end
+
         it "shows local variables" do
           html = error_page.do_variables("index" => 0)[:html]
-          expect(html).to include('<td class="name">local_a</td>')
-          expect(html).to include("<pre>:value_for_local_a</pre>")
-          expect(html).to include('<td class="name">local_b</td>')
-          expect(html).to include("<pre>:value_for_local_b</pre>")
+          expect(html).to have_tag('div.variables') do
+            with_tag('td.name', text: 'local_a')
+            with_tag('pre', text: ':value_for_local_a')
+            with_tag('td.name', text: 'local_b')
+            with_tag('pre', text: ':value_for_local_b')
+          end
         end
 
         it "shows instance variables" do
           html = error_page.do_variables("index" => 0)[:html]
-          expect(html).to include('<td class="name">' + '@inst_c</td>')
-          expect(html).to include("<pre>" + ":value_for_inst_c</pre>")
-          expect(html).to include('<td class="name">' + '@inst_d</td>')
-          expect(html).to include("<pre>" + ":value_for_inst_d</pre>")
+          expect(html).to have_tag('div.variables') do
+            with_tag('td.name', text: '@inst_c')
+            with_tag('pre', text: ':value_for_inst_c')
+            with_tag('td.name', text: '@inst_d')
+            with_tag('pre', text: ':value_for_inst_d')
+          end
         end
 
         it "does not show filtered variables" do
           allow(BetterErrors).to receive(:ignored_instance_variables).and_return([:@inst_d])
           html = error_page.do_variables("index" => 0)[:html]
-          expect(html).to include('<td class="name">' + '@inst_c</td>')
-          expect(html).to include("<pre>" + ":value_for_inst_c</pre>")
-          expect(html).not_to include('<td class="name">' + '@inst_d</td>')
-          expect(html).not_to include("<pre>" + ":value_for_inst_d</pre>")
+          expect(html).to have_tag('div.variables') do
+            with_tag('td.name', text: '@inst_c')
+            with_tag('pre', text: ':value_for_inst_c')
+          end
+          expect(html).not_to have_tag('div.variables td.name', text: '@inst_d')
         end
 
         context 'when maximum_variable_inspect_size is set' do
@@ -79,7 +93,7 @@ module BetterErrors
 
               it "shows the variable content" do
                 html = error_page.do_variables("index" => 0)[:html]
-                expect(html).to include(content)
+                expect(html).to have_tag('div.variables', text: %r{#{content}})
               end
             end
 
@@ -99,12 +113,12 @@ def inspect
                       "shortval"
                     end
                   end
-                  InspectableTestValue.new
+                  ExtremelyLargeInspectableTestValue.new
                 }
 
                 it "shows the variable content" do
                   html = error_page.do_variables("index" => 0)[:html]
-                  expect(html).to include("shortval")
+                  expect(html).to have_tag('div.variables', text: /shortval/)
                 end
               end
               context 'and does not implement #inspect' do
@@ -117,8 +131,8 @@ def inspect
 
                 it "includes an indication that the variable was too large" do
                   html = error_page.do_variables("index" => 0)[:html]
-                  expect(html).to_not include(content)
-                  expect(html).to include("Object too large")
+                  expect(html).not_to have_tag('div.variables', text: %r{#{content}})
+                  expect(html).to have_tag('div.variables', text: /Object too large/)
                 end
               end
 
@@ -135,13 +149,16 @@ def initialize
 
                 it "does not attempt to show the class name" do
                   html = error_page.do_variables("index" => 0)[:html]
-                  expect(html).to include('<td class="name">' + '@big_anonymous</td>')
-                  expect(html).to include('Object too large')
-                  expect(html).to include('Adjust BetterErrors.maximum_variable_inspect_size')
+                  expect(html).to have_tag('div.variables') do
+                    with_tag('td.name', text: '@big_anonymous')
+                    with_tag('.unsupported', text: /Object too large/)
+                    with_tag('.unsupported', text: /Adjust BetterErrors.maximum_variable_inspect_size/)
+                  end
                 end
               end
             end
           end
+
           context 'on a platform without ObjectSpace' do
             before do
               Object.send(:remove_const, :ObjectSpace) if Object.constants.include?(:ObjectSpace)
@@ -160,7 +177,7 @@ def initialize
 
               it "shows the variable content" do
                 html = error_page.do_variables("index" => 0)[:html]
-                expect(html).to include(content)
+                expect(html).to have_tag('div.variables', text: %r{#{content}})
               end
             end
 
@@ -180,12 +197,12 @@ def inspect
                       "shortval"
                     end
                   end
-                  InspectableTestValue.new
+                  ExtremelyLargeInspectableTestValue.new
                 }
 
                 it "shows the variable content" do
                   html = error_page.do_variables("index" => 0)[:html]
-                  expect(html).to include("shortval")
+                  expect(html).to have_tag('div.variables', text: /shortval/)
                 end
               end
               context 'and does not implement #inspect' do
@@ -197,9 +214,10 @@ def inspect
                 let(:content) { 'A' * 1101 }
 
                 it "includes an indication that the variable was too large" do
+
                   html = error_page.do_variables("index" => 0)[:html]
-                  expect(html).to_not include(content)
-                  expect(html).to include("Object too large")
+                  expect(html).not_to have_tag('div.variables', text: %r{#{content}})
+                  expect(html).to have_tag('div.variables', text: /Object too large/)
                 end
               end
             end
@@ -217,9 +235,11 @@ def initialize
 
               it "does not attempt to show the class name" do
                 html = error_page.do_variables("index" => 0)[:html]
-                expect(html).to include('<td class="name">' + '@big_anonymous</td>')
-                expect(html).to include('Object too large')
-                expect(html).to include('Adjust BetterErrors.maximum_variable_inspect_size')
+                expect(html).to have_tag('div.variables') do
+                  with_tag('td.name', text: '@big_anonymous')
+                  with_tag('.unsupported', text: /Object too large/)
+                  with_tag('.unsupported', text: /Adjust BetterErrors.maximum_variable_inspect_size/)
+                end
               end
             end
           end
@@ -239,23 +259,30 @@ def initialize
 
           it "includes the content of large variables" do
             html = error_page.do_variables("index" => 0)[:html]
-            expect(html).to include(content)
-            expect(html).to_not include("Object too large")
+            expect(html).to have_tag('div.variables', text: %r{#{content}})
+            expect(html).not_to have_tag('div.variables', text: /Object too large/)
           end
         end
-      else
+      end
+
+      context "when binding_of_caller is not loaded" do
+        before do
+          skip "binding_of_caller is loaded" if BetterErrors.binding_of_caller_available?
+        end
+
         it "tells the user to add binding_of_caller to their gemfile to get fancy features" do
           html = error_page.do_variables("index" => 0)[:html]
-          expect(html).to include(%{gem "binding_of_caller"})
+          expect(html).not_to have_tag('div.variables', text: /gem "binding_of_caller"/)
         end
       end
     end
 
     it "doesn't die if the source file is not a real filename" do
+      allow(exception).to receive(:__better_errors_bindings_stack).and_return([])
       allow(exception).to receive(:backtrace).and_return([
         "<internal:prelude>:10:in `spawn_rack_application'"
       ])
-      expect(response).to include("Source unavailable")
+      expect(response).to have_tag('.frames li .location .filename', text: '<internal:prelude>')
     end
 
     context 'with an exception with blank lines' do
@@ -299,6 +326,7 @@ def initialize(message = nil)
           )
         end
       end
+
       context 'with binding_of_caller available' do
         before do
           skip("Disabled without binding_of_caller") unless defined? ::BindingOfCaller

spec/spec_helper.rb

@@ -19,3 +19,9 @@
 
 require 'bundler/setup'
 Bundler.require(:default)
+
+require 'rspec-html-matchers'
+
+RSpec.configure do |config|
+  config.include RSpecHtmlMatchers
+end