a few more integration tests

Closes Homebrew/homebrew#47714.

Signed-off-by: Baptiste Fontaine <batifon@yahoo.fr>

Library/Homebrew/test/lib/integration_mocks.rb

@@ -0,0 +1,9 @@
+module Homebrew
+  module Diagnostic
+    class Checks
+      def check_integration_test
+        "This is an integration test" if ENV["HOMEBREW_INTEGRATION_TEST"]
+      end
+    end
+  end
+end

Library/Homebrew/test/test_integration_cmds.rb

@@ -11,6 +11,7 @@ class IntegrationCommandTests < Homebrew::TestCase
       -W0
       -I#{HOMEBREW_LIBRARY_PATH}/test/lib
       -rconfig
+      -rintegration_mocks
     ]
     cmd_args << "-rsimplecov" if ENV["HOMEBREW_TESTS_COVERAGE"]
     cmd_args << (HOMEBREW_LIBRARY_PATH/"../brew.rb").resolved_path.to_s
@@ -100,6 +101,11 @@ class IntegrationCommandTests < Homebrew::TestCase
                  cmd("--repository")
   end
 
+  def test_help
+    assert_match "Example usage:",
+                 cmd("help")
+  end
+
   def test_install
     assert_match "#{HOMEBREW_CELLAR}/testball/0.1", cmd("install", testball)
   ensure
@@ -214,26 +220,21 @@ class IntegrationCommandTests < Homebrew::TestCase
     bar_file.unlink unless bar_file.nil?
   end
 
-  def test_doctor_check_path_for_trailing_slashes
-    assert_match "Some directories in your path end in a slash",
-      cmd_fail("doctor", "check_path_for_trailing_slashes",
-               {"PATH" => ENV["PATH"] + File::PATH_SEPARATOR + "/foo/bar/"})
+  def test_doctor
+    assert_match "This is an integration test",
+                 cmd_fail("doctor", "check_integration_test")
   end
 
-  def test_doctor_check_for_anaconda
+  def test_custom_command
     mktmpdir do |path|
-      anaconda = "#{path}/anaconda"
-      python = "#{path}/python"
-      FileUtils.touch anaconda
-      File.open(python, "w") do |file|
-        file.write("#! #{`which bash`}\necho -n '#{python}'\n")
-      end
-      FileUtils.chmod 0777, anaconda
-      FileUtils.chmod 0777, python
+      cmd = "int-test-#{rand}"
+      file = "#{path}/brew-#{cmd}"
 
-      assert_match "Anaconda",
-        cmd_fail("doctor", "check_for_anaconda",
-                 {"PATH" => path + File::PATH_SEPARATOR + ENV["PATH"]})
+      File.open(file, "w") { |f| f.write "#!/bin/sh\necho 'I am #{cmd}'\n" }
+      FileUtils.chmod 0777, file
+
+      assert_match "I am #{cmd}",
+        cmd(cmd, {"PATH" => "#{path}#{File::PATH_SEPARATOR}#{ENV["PATH"]}"})
     end
   end
 end