1 files changed, 28 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_dependency_resolution_error.rb b/test/rubygems/test_gem_dependency_resolution_error.rb
new file mode 100644
index 0000000000..7f8cf0c5cc
--- /dev/null
+++ b/test/rubygems/test_gem_dependency_resolution_error.rb
@@ -0,0 +1,28 @@
+require 'rubygems/test_case'
+
+class TestGemDependencyResolutionError < Gem::TestCase
+
+  def setup
+    super
+
+    @DR = Gem::DependencyResolver
+
+    @spec = quick_spec 'a', 2
+
+    @a1_req = @DR::DependencyRequest.new dep('a', '= 1'), nil
+    @a2_req = @DR::DependencyRequest.new dep('a', '= 2'), nil
+
+    @activated = @DR::ActivationRequest.new @spec, @a2_req
+
+    @conflict = @DR::DependencyConflict.new @a1_req, @activated
+
+    @error = Gem::DependencyResolutionError.new @conflict
+  end
+
+  def test_message
+    assert_match %r%^conflicting dependencies a \(= 1\) and a \(= 2\)$%,
+                 @error.message
+  end
+
+end
+