1 files changed, 31 insertions, 6 deletions
diff --git a/spec/ruby/core/method/source_location_spec.rb b/spec/ruby/core/method/source_location_spec.rb
index dd81b02c77..22fcb98c74 100644
--- a/spec/ruby/core/method/source_location_spec.rb
+++ b/spec/ruby/core/method/source_location_spec.rb
@@ -7,18 +7,18 @@ describe "Method#source_location" do
   end
 
   it "returns an Array" do
-    @method.source_location.should be_an_instance_of(Array)
+    @method.source_location.should.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.first
-    file.should be_an_instance_of(String)
-    file.should == File.realpath('../fixtures/classes.rb', __FILE__)
+    file.should.instance_of?(String)
+    file.should == File.realpath('fixtures/classes.rb', __dir__)
   end
 
-  it "sets the last value to a Fixnum representing the line on which the method was defined" do
+  it "sets the last value to an Integer representing the line on which the method was defined" do
     line = @method.source_location.last
-    line.should be_an_instance_of(Fixnum)
+    line.should.instance_of?(Integer)
     line.should == 5
   end
 
@@ -86,10 +86,35 @@ describe "Method#source_location" do
     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.is_a?(Integer)
+    end
+
+    loc = method(:tap).source_location
+    if loc == nil
+      loc.should == nil
+    else
+      loc[0].should.start_with?('<internal:')
+      loc[1].should.is_a?(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
+    c.method(:m).source_location.should == ["foo", 100]
+  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
+      m.method(:handled_via_method_missing).source_location.should == nil
     end
   end
 end