Get the Tab class under test

Library/Homebrew/test/fixtures/receipt.json

@@ -0,0 +1,17 @@
+{
+  "used_options": [
+    "--with-foo",
+    "--without-bar"
+  ],
+  "unused_options": [
+    "--with-baz",
+    "--without-qux"
+  ],
+  "built_as_bottle": false,
+  "poured_from_bottle": true,
+  "tapped_from": "Homebrew/homebrew",
+  "time": 1403827774,
+  "HEAD": "deadbeefdeadbeefdeadbeefdeadbeefdeadbeef",
+  "stdlib": "libcxx",
+  "compiler": "clang"
+}

Library/Homebrew/test/test_tab.rb

@@ -0,0 +1,87 @@
+require "testing_env"
+require "tab"
+
+class TabTests < Homebrew::TestCase
+  def setup
+    @used, @unused = Options.new, Options.new
+    @used << Option.new("with-foo") << Option.new("without-bar")
+    @unused << Option.new("with-baz") << Option.new("without-qux")
+
+    @tab = Tab.new({
+      :used_options       => @used,
+      :unused_options     => @unused,
+      :build_as_bottle    => false,
+      :poured_from_bottle => true,
+      :tapped_from        => "Homebrew/homebrew",
+      :time               => nil,
+      :HEAD               => TEST_SHA1,
+      :compiler           => :clang,
+      :stdlib             => :libcxx,
+    })
+  end
+
+  def test_defaults
+    tab = Tab.dummy_tab
+    assert_empty tab.unused_options
+    assert_empty tab.used_options
+    assert_empty tab.options
+    refute tab.built_as_bottle
+    refute tab.poured_from_bottle
+    assert_empty tab.tapped_from
+    assert_nil tab.time
+    assert_nil tab.HEAD
+    assert_equal MacOS.default_compiler, tab.cxxstdlib.compiler
+    assert_nil tab.cxxstdlib.type
+  end
+
+  def test_include?
+    assert_includes @tab, "with-foo"
+    assert_includes @tab, "without-bar"
+  end
+
+  def test_with?
+    assert @tab.with?("foo")
+    assert @tab.with?("qux")
+    refute @tab.with?("bar")
+    refute @tab.with?("baz")
+  end
+
+  def test_universal?
+    refute_predicate @tab, :universal?
+    @used << "universal"
+    assert_predicate @tab, :universal?
+  end
+
+  def test_options
+    assert_equal (@used + @unused).to_a, @tab.options.to_a
+  end
+
+  def test_cxxstdlib
+    assert_equal :clang, @tab.cxxstdlib.compiler
+    assert_equal :libcxx, @tab.cxxstdlib.type
+  end
+
+  def test_other_attributes
+    assert_equal TEST_SHA1, @tab.HEAD
+    assert_equal "Homebrew/homebrew", @tab.tapped_from
+    assert_nil @tab.time
+    refute_predicate @tab, :built_as_bottle
+    assert_predicate @tab, :poured_from_bottle
+  end
+
+  def test_from_file
+    path = Pathname.new(TEST_DIRECTORY).join("fixtures", "receipt.json")
+    tab = Tab.from_file(path)
+
+    assert_equal @used.to_a, tab.used_options.to_a
+    assert_equal @unused.to_a, tab.unused_options.to_a
+    assert_equal (@used + @unused).to_a, tab.options.to_a
+    refute_predicate tab, :built_as_bottle
+    assert_predicate tab, :poured_from_bottle
+    assert_equal "Homebrew/homebrew", tab.tapped_from
+    refute_nil tab.time
+    assert_equal TEST_SHA1, tab.HEAD
+    assert_equal :clang, tab.cxxstdlib.compiler
+    assert_equal :libcxx, tab.cxxstdlib.type
+  end
+end