Rename requirements named *Dependency.

Dependency is another similar, related class and it's super confusing
to have some Requirements that are named *Dependency.

Closes Homebrew/homebrew#38891.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

22 files changed, 109 insertions, 88 deletions

diff --git a/Library/Homebrew/build.rb b/Library/Homebrew/build.rb
index 0c890c346..a594912c1 100644
--- a/Library/Homebrew/build.rb
+++ b/Library/Homebrew/build.rb
@@ -81,7 +81,7 @@ class Build
     if superenv?
       ENV.keg_only_deps = keg_only_deps.map(&:name)
       ENV.deps = deps.map { |d| d.to_formula.name }
-      ENV.x11 = reqs.any? { |rq| rq.kind_of?(X11Dependency) }
+      ENV.x11 = reqs.any? { |rq| rq.kind_of?(X11Requirement) }
       ENV.setup_build_environment(formula)
       post_superenv_hacks
       reqs.each(&:modify_build_environment)
diff --git a/Library/Homebrew/cmd/audit.rb b/Library/Homebrew/cmd/audit.rb
index 10f2ab53f..e3e0166a2 100644
--- a/Library/Homebrew/cmd/audit.rb
+++ b/Library/Homebrew/cmd/audit.rb
@@ -275,7 +275,7 @@ class FormulaAuditor
           problem "Use `depends_on :fortran` instead of `depends_on 'gfortran'`"
         when "open-mpi", "mpich2"
           problem <<-EOS.undent
-            There are multiple conflicting ways to install MPI. Use an MPIDependency:
+            There are multiple conflicting ways to install MPI. Use an MPIRequirement:
               depends_on :mpi => [<lang list>]
             Where <lang list> is a comma delimited list that can include:
               :cc, :cxx, :f77, :f90
@@ -698,11 +698,11 @@ class FormulaAuditor
       problem "Define method #{$1.inspect} in the class body, not at the top-level"
     end
 
-    if line =~ /ENV.fortran/ && !formula.requirements.map(&:class).include?(FortranDependency)
+    if line =~ /ENV.fortran/ && !formula.requirements.map(&:class).include?(FortranRequirement)
       problem "Use `depends_on :fortran` instead of `ENV.fortran`"
     end
 
-    if line =~ /JAVA_HOME/i && !formula.requirements.map(&:class).include?(JavaDependency)
+    if line =~ /JAVA_HOME/i && !formula.requirements.map(&:class).include?(JavaRequirement)
       problem "Use `depends_on :java` to set JAVA_HOME"
     end
 
diff --git a/Library/Homebrew/compat.rb b/Library/Homebrew/compat.rb
index 4343f4bc3..9c9ad8296 100644
--- a/Library/Homebrew/compat.rb
+++ b/Library/Homebrew/compat.rb
@@ -4,4 +4,5 @@ require 'compat/formula_specialties'
 require 'compat/hardware'
 require 'compat/macos'
 require 'compat/md5'
+require 'compat/requirements'
 require 'compat/version'
diff --git a/Library/Homebrew/compat/requirements.rb b/Library/Homebrew/compat/requirements.rb
new file mode 100644
index 000000000..3ddc218d5
--- /dev/null
+++ b/Library/Homebrew/compat/requirements.rb
@@ -0,0 +1,20 @@
+require "requirements"
+
+XcodeDependency            = XcodeRequirement
+MysqlDependency            = MysqlRequirement
+PostgresqlDependency       = PostgresqlRequirement
+GPGDependency              = GPGRequirement
+TeXDependency              = TeXRequirement
+MercurialDependency        = MercurialRequirement
+GitDependency              = GitRequirement
+AprDependency              = AprRequirement
+FortranDependency          = FortranRequirement
+JavaDependency             = JavaRequirement
+JavaRequirement            = JavaRequirement
+LanguageModuleDependency   = LanguageModuleRequirement
+MPIDependency              = MPIRequirement
+OsxfuseDependency          = OsxfuseRequirement
+PythonDependency           = PythonRequirement
+TuntapDependency           = TuntapRequirement
+X11Dependency              = X11Requirement
+ConflictsWithBinaryOsxfuse = NonBinaryOsxfuseRequirement
diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index 0211015f7..c9ccde7b9 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -1,8 +1,8 @@
 require 'dependency'
 require 'dependencies'
+require 'ld64_dependency'
 require 'requirement'
 require 'requirements'
-require 'requirements/ld64_dependency'
 require 'set'
 
 ## A dependency is a formula that another formula needs to install.
@@ -94,7 +94,7 @@ class DependencyCollector
     elsif tags.empty?
       Dependency.new(spec, tags)
     elsif (tag = tags.first) && LANGUAGE_MODULES.include?(tag)
-      LanguageModuleDependency.new(tag, spec, tags[1])
+      LanguageModuleRequirement.new(tag, spec, tags[1])
     else
       Dependency.new(spec, tags)
     end
@@ -102,25 +102,25 @@ class DependencyCollector
 
   def parse_symbol_spec(spec, tags)
     case spec
-    when :x11        then X11Dependency.new(spec.to_s, tags)
-    when :xcode      then XcodeDependency.new(tags)
+    when :x11        then X11Requirement.new(spec.to_s, tags)
+    when :xcode      then XcodeRequirement.new(tags)
     when :macos      then MinimumMacOSRequirement.new(tags)
-    when :mysql      then MysqlDependency.new(tags)
-    when :postgresql then PostgresqlDependency.new(tags)
-    when :gpg        then GPGDependency.new(tags)
-    when :fortran    then FortranDependency.new(tags)
-    when :mpi        then MPIDependency.new(*tags)
-    when :tex        then TeXDependency.new(tags)
+    when :mysql      then MysqlRequirement.new(tags)
+    when :postgresql then PostgresqlRequirement.new(tags)
+    when :gpg        then GPGRequirement.new(tags)
+    when :fortran    then FortranRequirement.new(tags)
+    when :mpi        then MPIRequirement.new(*tags)
+    when :tex        then TeXRequirement.new(tags)
     when :arch       then ArchRequirement.new(tags)
-    when :hg         then MercurialDependency.new(tags)
-    when :python     then PythonDependency.new(tags)
-    when :python3    then Python3Dependency.new(tags)
-    when :java       then JavaDependency.new(tags)
+    when :hg         then MercurialRequirement.new(tags)
+    when :python     then PythonRequirement.new(tags)
+    when :python3    then Python3Requirement.new(tags)
+    when :java       then JavaRequirement.new(tags)
     when :ruby       then RubyRequirement.new(tags)
-    when :osxfuse    then OsxfuseDependency.new(tags)
-    when :tuntap     then TuntapDependency.new(tags)
+    when :osxfuse    then OsxfuseRequirement.new(tags)
+    when :tuntap     then TuntapRequirement.new(tags)
     when :ant        then ant_dep(spec, tags)
-    when :apr        then AprDependency.new(tags)
+    when :apr        then AprRequirement.new(tags)
     when :emacs      then EmacsRequirement.new(tags)
     # Tiger's ld is too old to properly link some software
     when :ld64       then LD64Dependency.new if MacOS.version < :leopard
@@ -133,7 +133,7 @@ class DependencyCollector
       tags << :run
       Dependency.new("libtool", tags)
     when :python2
-      PythonDependency.new(tags)
+      PythonRequirement.new(tags)
     else
       raise ArgumentError, "Unsupported special dependency #{spec.inspect}"
     end
@@ -166,9 +166,9 @@ class DependencyCollector
     when strategy <= CurlDownloadStrategy
       parse_url_spec(spec.url, tags)
     when strategy <= GitDownloadStrategy
-      GitDependency.new(tags)
+      GitRequirement.new(tags)
     when strategy <= MercurialDownloadStrategy
-      MercurialDependency.new(tags)
+      MercurialRequirement.new(tags)
     when strategy <= FossilDownloadStrategy
       Dependency.new("fossil", tags)
     when strategy <= BazaarDownloadStrategy
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 979ef3721..e5b02f410 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -616,7 +616,7 @@ class Formula
   def python(options={}, &block)
     opoo 'Formula#python is deprecated and will go away shortly.'
     block.call if block_given?
-    PythonDependency.new
+    PythonRequirement.new
   end
   alias_method :python2, :python
   alias_method :python3, :python
diff --git a/Library/Homebrew/requirements/ld64_dependency.rb b/Library/Homebrew/ld64_dependency.rb
index 782a50860..782a50860 100644
--- a/Library/Homebrew/requirements/ld64_dependency.rb
+++ b/Library/Homebrew/ld64_dependency.rb
diff --git a/Library/Homebrew/requirements.rb b/Library/Homebrew/requirements.rb
index 269657e2e..d15995810 100644
--- a/Library/Homebrew/requirements.rb
+++ b/Library/Homebrew/requirements.rb
@@ -1,20 +1,20 @@
 require 'requirement'
-require 'requirements/apr_dependency'
-require 'requirements/fortran_dependency'
-require 'requirements/language_module_dependency'
+require 'requirements/apr_requirement'
+require 'requirements/fortran_requirement'
+require 'requirements/language_module_requirement'
 require 'requirements/minimum_macos_requirement'
 require 'requirements/maximum_macos_requirement'
-require 'requirements/mpi_dependency'
-require 'requirements/osxfuse_dependency'
-require 'requirements/python_dependency'
-require 'requirements/java_dependency'
+require 'requirements/mpi_requirement'
+require 'requirements/osxfuse_requirement'
+require 'requirements/python_requirement'
+require 'requirements/java_requirement'
 require 'requirements/ruby_requirement'
-require 'requirements/tuntap_dependency'
+require 'requirements/tuntap_requirement'
 require 'requirements/unsigned_kext_requirement'
-require 'requirements/x11_dependency'
+require 'requirements/x11_requirement'
 require 'requirements/emacs_requirement'
 
-class XcodeDependency < Requirement
+class XcodeRequirement < Requirement
   fatal true
 
   satisfy(:build_env => false) { xcode_installed_version }
@@ -52,28 +52,28 @@ class XcodeDependency < Requirement
   end
 end
 
-class MysqlDependency < Requirement
+class MysqlRequirement < Requirement
   fatal true
   default_formula 'mysql'
 
   satisfy { which 'mysql_config' }
 end
 
-class PostgresqlDependency < Requirement
+class PostgresqlRequirement < Requirement
   fatal true
   default_formula 'postgresql'
 
   satisfy { which 'pg_config' }
 end
 
-class GPGDependency < Requirement
+class GPGRequirement < Requirement
   fatal true
   default_formula "gpg"
 
   satisfy { which("gpg") || which("gpg2") }
 end
 
-class TeXDependency < Requirement
+class TeXRequirement < Requirement
   fatal true
   cask "mactex"
   download "https://www.tug.org/mactex/"
@@ -112,14 +112,14 @@ class ArchRequirement < Requirement
   end
 end
 
-class MercurialDependency < Requirement
+class MercurialRequirement < Requirement
   fatal true
   default_formula 'mercurial'
 
   satisfy { which('hg') }
 end
 
-class GitDependency < Requirement
+class GitRequirement < Requirement
   fatal true
   default_formula 'git'
   satisfy { !!which('git') }
diff --git a/Library/Homebrew/requirements/apr_dependency.rb b/Library/Homebrew/requirements/apr_requirement.rb
index 7dfd83f29..313407e12 100644
--- a/Library/Homebrew/requirements/apr_dependency.rb
+++ b/Library/Homebrew/requirements/apr_requirement.rb
@@ -1,6 +1,6 @@
 require "requirement"
 
-class AprDependency < Requirement
+class AprRequirement < Requirement
   fatal true
   default_formula "apr-util"
 
diff --git a/Library/Homebrew/requirements/fortran_dependency.rb b/Library/Homebrew/requirements/fortran_requirement.rb
index 8ab4a8dce..a86a1a8ef 100644
--- a/Library/Homebrew/requirements/fortran_dependency.rb
+++ b/Library/Homebrew/requirements/fortran_requirement.rb
@@ -1,6 +1,6 @@
 require 'requirement'
 
-class FortranDependency < Requirement
+class FortranRequirement < Requirement
   fatal true
 
   default_formula 'gcc'
diff --git a/Library/Homebrew/requirements/java_dependency.rb b/Library/Homebrew/requirements/java_requirement.rb
index 7eb6aefae..1c43ad295 100644
--- a/Library/Homebrew/requirements/java_dependency.rb
+++ b/Library/Homebrew/requirements/java_requirement.rb
@@ -1,6 +1,6 @@
 require "language/java"
 
-class JavaDependency < Requirement
+class JavaRequirement < Requirement
   fatal true
   cask "java"
   download "http://www.oracle.com/technetwork/java/javase/downloads/index.html"
diff --git a/Library/Homebrew/requirements/language_module_dependency.rb b/Library/Homebrew/requirements/language_module_requirement.rb
index 2843c5c6c..47cbe8bc1 100644
--- a/Library/Homebrew/requirements/language_module_dependency.rb
+++ b/Library/Homebrew/requirements/language_module_requirement.rb
@@ -1,6 +1,6 @@
 require 'requirement'
 
-class LanguageModuleDependency < Requirement
+class LanguageModuleRequirement < Requirement
   fatal true
 
   def initialize language, module_name, import_name=nil
diff --git a/Library/Homebrew/requirements/mpi_dependency.rb b/Library/Homebrew/requirements/mpi_requirement.rb
index 9a5547a73..5ed042a41 100644
--- a/Library/Homebrew/requirements/mpi_dependency.rb
+++ b/Library/Homebrew/requirements/mpi_requirement.rb
@@ -3,7 +3,7 @@ require 'requirement'
 # There are multiple implementations of MPI-2 available.
 # http://www.mpi-forum.org/
 # This requirement is used to find an appropriate one.
-class MPIDependency < Requirement
+class MPIRequirement < Requirement
 
   attr_reader :lang_list
 
diff --git a/Library/Homebrew/requirements/osxfuse_dependency.rb b/Library/Homebrew/requirements/osxfuse_requirement.rb
index f1acf68e9..190d71cde 100644
--- a/Library/Homebrew/requirements/osxfuse_dependency.rb
+++ b/Library/Homebrew/requirements/osxfuse_requirement.rb
@@ -1,6 +1,6 @@
 require "requirement"
 
-class OsxfuseDependency < Requirement
+class OsxfuseRequirement < Requirement
   fatal true
   default_formula "osxfuse"
   cask "osxfuse"
@@ -17,9 +17,9 @@ class OsxfuseDependency < Requirement
   end
 end
 
-class ConflictsWithBinaryOsxfuse < Requirement
+class NonBinaryOsxfuseRequirement < Requirement
   fatal true
-  satisfy { HOMEBREW_PREFIX.to_s != "/usr/local" || !OsxfuseDependency.binary_osxfuse_installed? }
+  satisfy { HOMEBREW_PREFIX.to_s != "/usr/local" || !OsxfuseRequirement.binary_osxfuse_installed? }
 
   def message
     <<-EOS.undent
diff --git a/Library/Homebrew/requirements/python_dependency.rb b/Library/Homebrew/requirements/python_requirement.rb
index f5276cb4e..df9d7328c 100644
--- a/Library/Homebrew/requirements/python_dependency.rb
+++ b/Library/Homebrew/requirements/python_requirement.rb
@@ -1,6 +1,6 @@
 require "language/python"
 
-class PythonDependency < Requirement
+class PythonRequirement < Requirement
   fatal true
   default_formula "python"
   cask "python"
@@ -47,7 +47,7 @@ class PythonDependency < Requirement
   alias_method :to_s, :python_binary
 end
 
-class Python3Dependency < PythonDependency
+class Python3Requirement < PythonRequirement
   fatal true
   default_formula "python3"
   cask "python3"
diff --git a/Library/Homebrew/requirements/tuntap_dependency.rb b/Library/Homebrew/requirements/tuntap_requirement.rb
index c3fa98ce1..1581393ac 100644
--- a/Library/Homebrew/requirements/tuntap_dependency.rb
+++ b/Library/Homebrew/requirements/tuntap_requirement.rb
@@ -1,6 +1,6 @@
 require "requirement"
 
-class TuntapDependency < Requirement
+class TuntapRequirement < Requirement
   fatal true
   default_formula "tuntap"
   cask "tuntap"
diff --git a/Library/Homebrew/requirements/x11_dependency.rb b/Library/Homebrew/requirements/x11_requirement.rb
index 5f7e4b526..890ef4d4f 100644
--- a/Library/Homebrew/requirements/x11_dependency.rb
+++ b/Library/Homebrew/requirements/x11_requirement.rb
@@ -1,6 +1,6 @@
 require "requirement"
 
-class X11Dependency < Requirement
+class X11Requirement < Requirement
   include Comparable
   attr_reader :min_version
 
@@ -33,7 +33,7 @@ class X11Dependency < Requirement
   end
 
   def <=> other
-    return unless X11Dependency === other
+    return unless X11Requirement === other
     min_version <=> other.min_version
   end
 
diff --git a/Library/Homebrew/test/test_dependencies.rb b/Library/Homebrew/test/test_dependencies.rb
index 1c64e26e8..b587cd12a 100644
--- a/Library/Homebrew/test/test_dependencies.rb
+++ b/Library/Homebrew/test/test_dependencies.rb
@@ -83,19 +83,19 @@ class RequirementsTests < Homebrew::TestCase
   end
 
   def test_merging_multiple_dependencies
-    @reqs << X11Dependency.new << X11Dependency.new
+    @reqs << X11Requirement.new << X11Requirement.new
     assert_equal 1, @reqs.count
     @reqs << Requirement.new
     assert_equal 2, @reqs.count
   end
 
   def test_comparison_prefers_larger
-    @reqs << X11Dependency.new << X11Dependency.new("x11", %w[2.6])
-    assert_equal [X11Dependency.new("x11", %w[2.6])], @reqs.to_a
+    @reqs << X11Requirement.new << X11Requirement.new("x11", %w[2.6])
+    assert_equal [X11Requirement.new("x11", %w[2.6])], @reqs.to_a
   end
 
   def test_comparison_does_not_merge_smaller
-    @reqs << X11Dependency.new("x11", %w{2.6}) << X11Dependency.new
-    assert_equal [X11Dependency.new("x11", %w[2.6])], @reqs.to_a
+    @reqs << X11Requirement.new("x11", %w{2.6}) << X11Requirement.new
+    assert_equal [X11Requirement.new("x11", %w[2.6])], @reqs.to_a
   end
 end
diff --git a/Library/Homebrew/test/test_dependency_collector.rb b/Library/Homebrew/test/test_dependency_collector.rb
index 6700a97c8..1f4ffc784 100644
--- a/Library/Homebrew/test/test_dependency_collector.rb
+++ b/Library/Homebrew/test/test_dependency_collector.rb
@@ -39,7 +39,7 @@ class DependencyCollectorTests < Homebrew::TestCase
 
   def test_requirement_creation
     @d.add :x11
-    assert_instance_of X11Dependency, find_requirement(X11Dependency)
+    assert_instance_of X11Requirement, find_requirement(X11Requirement)
   end
 
   def test_no_duplicate_requirements
@@ -50,28 +50,28 @@ class DependencyCollectorTests < Homebrew::TestCase
   def test_requirement_tags
     @d.add :x11 => '2.5.1'
     @d.add :xcode => :build
-    assert_empty find_requirement(X11Dependency).tags
-    assert_predicate find_requirement(XcodeDependency), :build?
+    assert_empty find_requirement(X11Requirement).tags
+    assert_predicate find_requirement(XcodeRequirement), :build?
   end
 
   def test_x11_no_tag
     @d.add :x11
-    assert_empty find_requirement(X11Dependency).tags
+    assert_empty find_requirement(X11Requirement).tags
   end
 
   def test_x11_min_version
     @d.add :x11 => '2.5.1'
-    assert_equal "2.5.1", find_requirement(X11Dependency).min_version.to_s
+    assert_equal "2.5.1", find_requirement(X11Requirement).min_version.to_s
   end
 
   def test_x11_tag
     @d.add :x11 => :optional
-    assert_predicate find_requirement(X11Dependency), :optional?
+    assert_predicate find_requirement(X11Requirement), :optional?
   end
 
   def test_x11_min_version_and_tag
     @d.add :x11 => ['2.5.1', :optional]
-    dep = find_requirement(X11Dependency)
+    dep = find_requirement(X11Requirement)
     assert_equal '2.5.1', dep.min_version.to_s
     assert_predicate dep, :optional?
   end
@@ -104,7 +104,7 @@ class DependencyCollectorTests < Homebrew::TestCase
   def test_resource_dep_git_url
     resource = Resource.new
     resource.url("git://example.com/foo/bar.git")
-    assert_instance_of GitDependency, @d.add(resource)
+    assert_instance_of GitRequirement, @d.add(resource)
   end
 
   def test_resource_dep_gzip_url
diff --git a/Library/Homebrew/test/test_language_module_dependency.rb b/Library/Homebrew/test/test_language_module_requirement.rb
index a06765c29..4a64e5ba7 100644
--- a/Library/Homebrew/test/test_language_module_dependency.rb
+++ b/Library/Homebrew/test/test_language_module_requirement.rb
@@ -1,20 +1,20 @@
 require 'testing_env'
-require 'requirements/language_module_dependency'
+require 'requirements/language_module_requirement'
 
-class LanguageModuleDependencyTests < Homebrew::TestCase
+class LanguageModuleRequirementTests < Homebrew::TestCase
   parallelize_me!
 
   def assert_deps_fail(spec)
-    refute_predicate LanguageModuleDependency.new(*spec.shift.reverse), :satisfied?
+    refute_predicate LanguageModuleRequirement.new(*spec.shift.reverse), :satisfied?
   end
 
   def assert_deps_pass(spec)
-    assert_predicate LanguageModuleDependency.new(*spec.shift.reverse), :satisfied?
+    assert_predicate LanguageModuleRequirement.new(*spec.shift.reverse), :satisfied?
   end
 
   def test_unique_deps_are_not_eql
-    x = LanguageModuleDependency.new(:node, "less")
-    y = LanguageModuleDependency.new(:node, "coffee-script")
+    x = LanguageModuleRequirement.new(:node, "less")
+    y = LanguageModuleRequirement.new(:node, "coffee-script")
     refute_eql x, y
     refute_equal x.hash, y.hash
   end
@@ -22,7 +22,7 @@ class LanguageModuleDependencyTests < Homebrew::TestCase
   def test_differing_module_and_import_name
     mod_name = "foo"
     import_name = "bar"
-    l = LanguageModuleDependency.new(:python, mod_name, import_name)
+    l = LanguageModuleRequirement.new(:python, mod_name, import_name)
     assert_includes l.message, mod_name
     assert_includes l.the_test, "import #{import_name}"
   end
diff --git a/Library/Homebrew/test/test_mpi_dependency.rb b/Library/Homebrew/test/test_mpi_requirement.rb
index c90c767e7..0b8555cd4 100644
--- a/Library/Homebrew/test/test_mpi_dependency.rb
+++ b/Library/Homebrew/test/test_mpi_requirement.rb
@@ -1,11 +1,11 @@
 require 'testing_env'
-require 'requirements/mpi_dependency'
+require 'requirements/mpi_requirement'
 
-class MPIDependencyTests < Homebrew::TestCase
+class MPIRequirementTests < Homebrew::TestCase
   def test_initialize_untangles_tags_and_wrapper_symbols
     wrappers = [:cc, :cxx, :f77]
     tags = [:optional, 'some-other-tag']
-    dep = MPIDependency.new(*wrappers + tags)
+    dep = MPIRequirement.new(*wrappers + tags)
     assert_equal wrappers, dep.lang_list
     assert_equal tags, dep.tags
   end
diff --git a/Library/Homebrew/test/test_x11_dependency.rb b/Library/Homebrew/test/test_x11_requirement.rb
index bc4d72761..0f7ffe004 100644
--- a/Library/Homebrew/test/test_x11_dependency.rb
+++ b/Library/Homebrew/test/test_x11_requirement.rb
@@ -1,29 +1,29 @@
 require 'testing_env'
-require 'requirements/x11_dependency'
+require 'requirements/x11_requirement'
 
-class X11DependencyTests < Homebrew::TestCase
+class X11RequirementTests < Homebrew::TestCase
   def test_eql_instances_are_eql
-    x = X11Dependency.new
-    y = X11Dependency.new
+    x = X11Requirement.new
+    y = X11Requirement.new
     assert_eql x, y
     assert_equal x.hash, y.hash
   end
 
   def test_not_eql_when_hashes_differ
-    x = X11Dependency.new("foo")
-    y = X11Dependency.new
+    x = X11Requirement.new("foo")
+    y = X11Requirement.new
     refute_eql x, y
     refute_equal x.hash, y.hash
   end
 
   def test_different_min_version
-    x = X11Dependency.new
-    y = X11Dependency.new("x11", %w[2.5])
+    x = X11Requirement.new
+    y = X11Requirement.new("x11", %w[2.5])
     refute_eql x, y
   end
 
   def test_x_env
-    x = X11Dependency.new
+    x = X11Requirement.new
     x.stubs(:satisfied?).returns(true)
     ENV.expects(:x11)
     x.modify_build_environment
@@ -32,9 +32,9 @@ class X11DependencyTests < Homebrew::TestCase
   def test_satisfied
     MacOS::XQuartz.stubs(:version).returns("2.7.5")
     MacOS::XQuartz.stubs(:installed?).returns(true)
-    assert_predicate X11Dependency.new, :satisfied?
+    assert_predicate X11Requirement.new, :satisfied?
 
     MacOS::XQuartz.stubs(:installed?).returns(false)
-    refute_predicate X11Dependency.new, :satisfied?
+    refute_predicate X11Requirement.new, :satisfied?
   end
 end