1 files changed, 52 insertions, 0 deletions
diff --git a/test/rake/test_rake_invocation_chain.rb b/test/rake/test_rake_invocation_chain.rb
new file mode 100644
index 0000000000..1aab1eac81
--- /dev/null
+++ b/test/rake/test_rake_invocation_chain.rb
@@ -0,0 +1,52 @@
+require File.expand_path('../helper', __FILE__)
+
+class TestRakeInvocationChain < Rake::TestCase
+
+  def setup
+    super
+
+    @empty = Rake::InvocationChain::EMPTY
+
+    @first_member = "A"
+    @second_member = "B"
+    @one = @empty.append(@first_member)
+    @two = @one.append(@second_member)
+  end
+
+  def test_append
+    chain = @empty.append("A")
+
+    assert_equal 'TOP => A', chain.to_s # HACK
+  end
+
+  def test_append_one_circular
+    ex = assert_raises RuntimeError do
+      @one.append(@first_member)
+    end
+    assert_match(/circular +dependency/i, ex.message)
+    assert_match(/A.*=>.*A/, ex.message)
+  end
+
+  def test_append_two_circular
+    ex = assert_raises RuntimeError do
+      @two.append(@first_member)
+    end
+    assert_match(/A.*=>.*B.*=>.*A/, ex.message)
+  end
+
+  def test_member_eh_one
+    assert @one.member?(@first_member)
+  end
+
+  def test_member_eh_two
+    assert @two.member?(@first_member)
+    assert @two.member?(@second_member)
+  end
+
+  def test_to_s_empty
+    assert_equal "TOP", @empty.to_s
+    assert_equal "TOP => A", @one.to_s
+  end
+
+end
+