Refactor `OsxfuseRequirement` spec.

Library/Homebrew/dev-cmd/tests.rb

@@ -113,6 +113,7 @@ module Homebrew
       end
 
       unless OS.linux?
+        args << "--tag" << "~needs_linux"
         files = files.reject { |p| p =~ %r{^test/os/linux(/.*|_spec\.rb)$} }
       end
 

Library/Homebrew/extend/os/mac/requirements/non_binary_osxfuse_requirement.rb

+require "requirement"
+
+class NonBinaryOsxfuseRequirement < Requirement
+  fatal true
+  satisfy(build_env: false) do
+    HOMEBREW_PREFIX.to_s != "/usr/local" || !OsxfuseRequirement.binary_osxfuse_installed?
+  end
+
+  def message
+    <<~EOS
+      osxfuse is already installed from the binary distribution and
+      conflicts with this formula.
+    EOS
+  end
+end

Library/Homebrew/extend/os/mac/requirements/osxfuse_requirement.rb

@@ -19,15 +19,3 @@ class OsxfuseRequirement < Requirement
     end
   end
 end
-
-class NonBinaryOsxfuseRequirement < Requirement
-  fatal true
-  satisfy(build_env: false) { HOMEBREW_PREFIX.to_s != "/usr/local" || !OsxfuseRequirement.binary_osxfuse_installed? }
-
-  def message
-    <<~EOS
-      osxfuse is already installed from the binary distribution and
-      conflicts with this formula.
-    EOS
-  end
-end

Library/Homebrew/extend/os/requirements/non_binary_osxfuse_requirement.rb

+if OS.mac?
+  require "extend/os/mac/requirements/non_binary_osxfuse_requirement"
+end

Library/Homebrew/requirements/non_binary_osxfuse_requirement.rb

+require "requirement"
+
+class NonBinaryOsxfuseRequirement < Requirement
+  fatal false
+end
+
+require "extend/os/requirements/non_binary_osxfuse_requirement"

Library/Homebrew/requirements/osxfuse_requirement.rb

@@ -5,8 +5,4 @@ class OsxfuseRequirement < Requirement
   fatal true
 end
 
-class NonBinaryOsxfuseRequirement < Requirement
-  fatal false
-end
-
 require "extend/os/requirements/osxfuse_requirement"

Library/Homebrew/test/os/linux/osxfuse_requirement_spec.rb

-require "requirements/osxfuse_requirement"
-
-describe OsxfuseRequirement do
-  subject { described_class.new([]) }
-
-  describe "#message" do
-    its(:message) { is_expected.to match("libfuse is required to install this formula") }
-  end
-end

Library/Homebrew/test/os/mac/osxfuse_requirement_spec.rb

-require "requirements/osxfuse_requirement"
-
-describe OsxfuseRequirement do
-  subject { described_class.new([]) }
-
-  describe "::binary_osxfuse_installed?" do
-    it "returns false if fuse.h does not exist" do
-      allow(File).to receive(:exist?).and_return(false)
-      expect(described_class).not_to be_binary_osxfuse_installed
-    end
-
-    it "returns false if osxfuse include directory is a symlink" do
-      allow(File).to receive(:exist?).and_return(true)
-      allow(File).to receive(:symlink?).and_return(true)
-      expect(described_class).not_to be_binary_osxfuse_installed
-    end
-  end
-
-  describe "environment" do
-    it "adds the fuse directories to the appropriate paths" do
-      expect(ENV).to receive(:append_path).with("PKG_CONFIG_PATH", any_args)
-      expect(ENV).to receive(:append_path).with("HOMEBREW_LIBRARY_PATHS", any_args)
-      expect(ENV).to receive(:append_path).with("HOMEBREW_INCLUDE_PATHS", any_args)
-      subject.modify_build_environment
-    end
-  end
-end
-
-describe NonBinaryOsxfuseRequirement do
-  subject { described_class.new([]) }
-
-  describe "#message" do
-    msg = /osxfuse is already installed from the binary distribution/
-    its(:message) { is_expected.to match(msg) }
-  end
-end

Library/Homebrew/test/requirements/non_binary_osxfuse_requirement_spec.rb

+require "requirements/non_binary_osxfuse_requirement"
+
+describe NonBinaryOsxfuseRequirement, :needs_macos do
+  subject { described_class.new([]) }
+
+  describe "#message" do
+    its(:message) { is_expected.to match("osxfuse is already installed from the binary distribution") }
+  end
+end

Library/Homebrew/test/requirements/osxfuse_requirement_spec.rb

+require "requirements/osxfuse_requirement"
+
+describe OsxfuseRequirement do
+  subject(:requirement) { described_class.new([]) }
+
+  describe "::binary_osxfuse_installed?", :needs_macos do
+    alias_matcher :have_binary_osxfuse_installed, :be_binary_osxfuse_installed
+
+    it "returns false if fuse.h does not exist" do
+      allow(File).to receive(:exist?).and_return(false)
+      expect(described_class).not_to have_binary_osxfuse_installed
+    end
+
+    it "returns false if osxfuse include directory is a symlink" do
+      allow(File).to receive(:exist?).and_return(true)
+      allow(File).to receive(:symlink?).and_return(true)
+      expect(described_class).not_to have_binary_osxfuse_installed
+    end
+  end
+
+  describe "#modify_build_environment", :needs_macos do
+    it "adds the fuse directories to PKG_CONFIG_PATH" do
+      allow(ENV).to receive(:append_path)
+      requirement.modify_build_environment
+      expect(ENV).to have_received(:append_path).with("PKG_CONFIG_PATH", any_args)
+    end
+
+    it "adds the fuse directories to HOMEBREW_LIBRARY_PATHS" do
+      allow(ENV).to receive(:append_path)
+      requirement.modify_build_environment
+      expect(ENV).to have_received(:append_path).with("HOMEBREW_LIBRARY_PATHS", any_args)
+    end
+
+    it "adds the fuse directories to HOMEBREW_INCLUDE_PATHS" do
+      allow(ENV).to receive(:append_path)
+      requirement.modify_build_environment
+      expect(ENV).to have_received(:append_path).with("HOMEBREW_INCLUDE_PATHS", any_args)
+    end
+  end
+
+  describe "#message" do
+    it "prompts for installation of 'libfuse' on Linux", :needs_linux do
+      expect(requirement.message).to match("libfuse is required to install this formula")
+    end
+
+    it "prompts for installation of 'osxFuse' on macOS", :needs_macos do
+      expect(requirement.message).to match("osxfuse.github.io")
+    end
+  end
+end