add test for bottle disable

Closes Homebrew/homebrew#43935.

Signed-off-by: Xu Cheng <xucheng@me.com>

Library/Homebrew/test/test_bottle_hooks.rb

@@ -6,6 +6,7 @@ class BottleHookTests < Homebrew::TestCase
   class FormulaDouble
     def bottle; end
     def local_bottle_path; end
+    def bottle_disabled?; false end
 
     def some_random_method
       true

Library/Homebrew/test/test_formula_installer.rb

@@ -51,4 +51,20 @@ class InstallTests < Homebrew::TestCase
       assert_equal 3, bin.children.length
     end
   end
+
+  def test_bottle_unneeded_formula_install
+    MacOS.stubs(:has_apple_developer_tools?).returns(false)
+
+    formula = Testball.new
+    formula.stubs(:bottle_unneeded?).returns(true)
+    formula.stubs(:bottle_disabled?).returns(true)
+
+    refute_predicate formula, :bottled?
+    assert_predicate formula, :bottle_unneeded?
+    assert_predicate formula, :bottle_disabled?
+
+    temporary_install(formula) do |f|
+      assert_predicate f, :installed?
+    end
+  end
 end

Library/Homebrew/test/test_formula_support.rb

@@ -11,3 +11,17 @@ class KegOnlyReasonTests < Homebrew::TestCase
     assert_match(/^OS X already provides/, r.to_s)
   end
 end
+
+class BottleDisableReasonTests < Homebrew::TestCase
+  def test_bottle_unneeded
+    bottle_disable_reason = BottleDisableReason.new :unneeded, nil
+    assert_predicate bottle_disable_reason, :unneeded?
+    assert_equal "This formula doesn't require compiling.", bottle_disable_reason.to_s
+  end
+
+  def test_bottle_disabled
+    bottle_disable_reason = BottleDisableReason.new :disable, "reason"
+    refute_predicate bottle_disable_reason, :unneeded?
+    assert_equal "reason", bottle_disable_reason.to_s
+  end
+end