Add needs_linux tag to specs that fails on MacOS

Library/Homebrew/software_spec.rb

@@ -171,7 +171,7 @@ class SoftwareSpec
   end
 
   def uses_from_macos(deps, **_args)
-    deps.is_a?(Hash) && deps = Hash[*deps.shift]
+    deps = Hash[*deps.shift] if deps.is_a?(Hash)
 
     depends_on(deps)
   end

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

@@ -1,35 +0,0 @@
-# frozen_string_literal: true
-
-require "software_spec"
-
-describe SoftwareSpec do
-  subject(:spec) { described_class.new }
-
-  describe "#uses_from_macos" do
-    before do
-      allow(OS).to receive(:linux?).and_return(true)
-    end
-
-    it "allows specifying dependencies" do
-      spec.uses_from_macos("foo")
-
-      expect(spec.deps.first.name).to eq("foo")
-    end
-
-    it "works with tags" do
-      spec.uses_from_macos("foo" => :head, :after => :mojave)
-
-      expect(spec.deps.first.name).to eq("foo")
-      expect(spec.deps.first.tags).to include(:head)
-    end
-
-    it "ignores OS version specifications" do
-      spec.uses_from_macos("foo", after: :mojave)
-      spec.uses_from_macos("bar" => :head, :after => :mojave)
-
-      expect(spec.deps.first.name).to eq("foo")
-      expect(spec.deps.last.name).to eq("bar")
-      expect(spec.deps.last.tags).to include(:head)
-    end
-  end
-end

Library/Homebrew/test/software_spec_spec.rb

@@ -132,6 +132,30 @@ describe SoftwareSpec do
     end
   end
 
+  describe "#uses_from_macos" do
+    it "allows specifying dependencies", :needs_linux do
+      spec.uses_from_macos("foo")
+
+      expect(spec.deps.first.name).to eq("foo")
+    end
+
+    it "works with tags", :needs_linux do
+      spec.uses_from_macos("foo" => :head, :after => :mojave)
+
+      expect(spec.deps.first.name).to eq("foo")
+      expect(spec.deps.first.tags).to include(:head)
+    end
+
+    it "ignores OS version specifications", :needs_linux do
+      spec.uses_from_macos("foo", after: :mojave)
+      spec.uses_from_macos("bar" => :head, :after => :mojave)
+
+      expect(spec.deps.first.name).to eq("foo")
+      expect(spec.deps.last.name).to eq("bar")
+      expect(spec.deps.last.tags).to include(:head)
+    end
+  end
+
   specify "explicit options override defaupt depends_on option description" do
     subject.option("with-foo", "blah")
     subject.depends_on("foo" => :optional)