1 files changed, 126 insertions, 0 deletions
diff --git a/spec/ruby/core/method/source_location_spec.rb b/spec/ruby/core/method/source_location_spec.rb
new file mode 100644
index 0000000000..87413a2ab6
--- /dev/null
+++ b/spec/ruby/core/method/source_location_spec.rb
@@ -0,0 +1,126 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Method#source_location" do
+  before :each do
+    @method = MethodSpecs::SourceLocation.method(:location)
+  end
+
+  it "returns an Array" do
+    @method.source_location.should be_an_instance_of(Array)
+  end
+
+  it "sets the first value to the path of the file in which the method was defined" do
+    file = @method.source_location[0]
+    file.should be_an_instance_of(String)
+    file.should == File.realpath('fixtures/classes.rb', __dir__)
+  end
+
+  it "sets the last value to an Integer representing the line on which the method was defined" do
+    line = @method.source_location[1]
+    line.should be_an_instance_of(Integer)
+    line.should == 5
+  end
+
+  it "returns the last place the method was defined" do
+    MethodSpecs::SourceLocation.method(:redefined).source_location[1].should == 13
+  end
+
+  it "returns the location of the original method even if it was aliased" do
+    MethodSpecs::SourceLocation.new.method(:aka).source_location[1].should == 17
+  end
+
+  it "works for methods defined with a block" do
+    line = nil
+    klass = Class.new do
+      line = __LINE__ + 1
+      define_method(:f) { }
+    end
+
+    method = klass.new.method(:f)
+    method.source_location[0].should =~ /#{__FILE__}/
+    method.source_location[1].should == line
+  end
+
+  it "works for methods defined with a Method" do
+    line = nil
+    klass = Class.new do
+      line = __LINE__ + 1
+      def f
+      end
+      define_method :g, new.method(:f)
+    end
+
+    method = klass.new.method(:g)
+    method.source_location[0].should =~ /#{__FILE__}/
+    method.source_location[1].should == line
+  end
+
+  it "works for methods defined with an UnboundMethod" do
+    line = nil
+    klass = Class.new do
+      line = __LINE__ + 1
+      def f
+      end
+      define_method :g, instance_method(:f)
+    end
+
+    method = klass.new.method(:g)
+    method.source_location[0].should =~ /#{__FILE__}/
+    method.source_location[1].should == line
+  end
+
+  it "works for methods whose visibility has been overridden in a subclass" do
+    line = nil
+    superclass = Class.new do
+      line = __LINE__ + 1
+      def f
+      end
+    end
+    subclass = Class.new(superclass) do
+      private :f
+    end
+
+    method = subclass.new.method(:f)
+    method.source_location[0].should =~ /#{__FILE__}/
+    method.source_location[1].should == line
+  end
+
+  it "works for core methods where it returns nil or <internal:" do
+    loc = method(:__id__).source_location
+    if loc == nil
+      loc.should == nil
+    else
+      loc[0].should.start_with?('<internal:')
+      loc[1].should be_kind_of(Integer)
+    end
+
+    loc = method(:tap).source_location
+    if loc == nil
+      loc.should == nil
+    else
+      loc[0].should.start_with?('<internal:')
+      loc[1].should be_kind_of(Integer)
+    end
+  end
+
+  it "works for eval with a given line" do
+    c = Class.new do
+      eval('def self.m; end', nil, "foo", 100)
+    end
+    location = c.method(:m).source_location
+    ruby_version_is(""..."4.1") do
+      location.should == ["foo", 100]
+    end
+    ruby_version_is("4.1") do
+      location.should == ["foo", 100, 0, 100, 15]
+    end
+  end
+
+  describe "for a Method generated by respond_to_missing?" do
+    it "returns nil" do
+      m = MethodSpecs::Methods.new
+      m.method(:handled_via_method_missing).source_location.should be_nil
+    end
+  end
+end