1 files changed, 125 insertions, 0 deletions
diff --git a/Library/Homebrew/test/dependency_test.rb b/Library/Homebrew/test/dependency_test.rb
new file mode 100644
index 000000000..65255995e
--- /dev/null
+++ b/Library/Homebrew/test/dependency_test.rb
@@ -0,0 +1,125 @@
+require "testing_env"
+require "dependency"
+
+class DependableTests < Homebrew::TestCase
+  def setup
+    @tags = ["foo", "bar", :build]
+    @dep = Struct.new(:tags).new(@tags).extend(Dependable)
+  end
+
+  def test_options
+    assert_equal %w[--foo --bar].sort, @dep.options.as_flags.sort
+  end
+
+  def test_interrogation
+    assert_predicate @dep, :build?
+    refute_predicate @dep, :optional?
+    refute_predicate @dep, :recommended?
+  end
+end
+
+class DependencyTests < Homebrew::TestCase
+  def test_accepts_single_tag
+    dep = Dependency.new("foo", %w[bar])
+    assert_equal %w[bar], dep.tags
+  end
+
+  def test_accepts_multiple_tags
+    dep = Dependency.new("foo", %w[bar baz])
+    assert_equal %w[bar baz].sort, dep.tags.sort
+  end
+
+  def test_preserves_symbol_tags
+    dep = Dependency.new("foo", [:build])
+    assert_equal [:build], dep.tags
+  end
+
+  def test_accepts_symbol_and_string_tags
+    dep = Dependency.new("foo", [:build, "bar"])
+    assert_equal [:build, "bar"], dep.tags
+  end
+
+  def test_merge_repeats
+    dep = Dependency.new("foo", [:build], nil, "foo")
+    dep2 = Dependency.new("foo", ["bar"], nil, "foo2")
+    dep3 = Dependency.new("xyz", ["abc"], nil, "foo")
+    merged = Dependency.merge_repeats([dep, dep2, dep3])
+    assert_equal 2, merged.length
+    assert_equal Dependency, merged.first.class
+
+    foo_named_dep = merged.find { |d| d.name == "foo" }
+    assert_equal ["bar"], foo_named_dep.tags
+    assert_includes foo_named_dep.option_names, "foo"
+    assert_includes foo_named_dep.option_names, "foo2"
+
+    xyz_named_dep = merged.find { |d| d.name == "xyz" }
+    assert_equal ["abc"], xyz_named_dep.tags
+    assert_includes xyz_named_dep.option_names, "foo"
+    refute_includes xyz_named_dep.option_names, "foo2"
+  end
+
+  def test_merges_necessity_tags
+    required_dep = Dependency.new("foo")
+    recommended_dep = Dependency.new("foo", [:recommended])
+    optional_dep = Dependency.new("foo", [:optional])
+
+    deps = Dependency.merge_repeats([required_dep, recommended_dep])
+    assert_equal deps.count, 1
+    assert_predicate deps.first, :required?
+    refute_predicate deps.first, :recommended?
+    refute_predicate deps.first, :optional?
+
+    deps = Dependency.merge_repeats([required_dep, optional_dep])
+    assert_equal deps.count, 1
+    assert_predicate deps.first, :required?
+    refute_predicate deps.first, :recommended?
+    refute_predicate deps.first, :optional?
+
+    deps = Dependency.merge_repeats([recommended_dep, optional_dep])
+    assert_equal deps.count, 1
+    refute_predicate deps.first, :required?
+    assert_predicate deps.first, :recommended?
+    refute_predicate deps.first, :optional?
+  end
+
+  def test_merges_temporality_tags
+    normal_dep = Dependency.new("foo")
+    build_dep = Dependency.new("foo", [:build])
+    run_dep = Dependency.new("foo", [:run])
+
+    deps = Dependency.merge_repeats([normal_dep, build_dep])
+    assert_equal deps.count, 1
+    refute_predicate deps.first, :build?
+    refute_predicate deps.first, :run?
+
+    deps = Dependency.merge_repeats([normal_dep, run_dep])
+    assert_equal deps.count, 1
+    refute_predicate deps.first, :build?
+    refute_predicate deps.first, :run?
+
+    deps = Dependency.merge_repeats([build_dep, run_dep])
+    assert_equal deps.count, 1
+    refute_predicate deps.first, :build?
+    refute_predicate deps.first, :run?
+  end
+
+  def test_equality
+    foo1 = Dependency.new("foo")
+    foo2 = Dependency.new("foo")
+    bar = Dependency.new("bar")
+    assert_equal foo1, foo2
+    assert_eql foo1, foo2
+    refute_equal foo1, bar
+    refute_eql foo1, bar
+    foo3 = Dependency.new("foo", [:build])
+    refute_equal foo1, foo3
+    refute_eql foo1, foo3
+  end
+end
+
+class TapDependencyTests < Homebrew::TestCase
+  def test_option_names
+    dep = TapDependency.new("foo/bar/dog")
+    assert_equal %w[dog], dep.option_names
+  end
+end