1 files changed, 47 insertions, 0 deletions
diff --git a/spec/ruby/core/array/element_set_spec.rb b/spec/ruby/core/array/element_set_spec.rb
index 9375ff9b80..f58f0ffdc4 100644
--- a/spec/ruby/core/array/element_set_spec.rb
+++ b/spec/ruby/core/array/element_set_spec.rb
@@ -396,6 +396,14 @@ describe "Array#[]= with [m..n]" do
     a.should == [1, 2, 3, 8, 4, 5]
   end
 
+  it "inserts at the end if m > the array size" do
+    a = [1, 2, 3]
+    a[3..3] = [4]
+    a.should == [1, 2, 3, 4]
+    a[5..7] = [6]
+    a.should == [1, 2, 3, 4, nil, 6]
+  end
+
   describe "Range subclasses" do
     before :each do
       @range_incl = ArraySpecs::MyRange.new(1, 2)
@@ -425,6 +433,45 @@ describe "Array#[]= with [m..n]" do
   end
 end
 
+ruby_version_is "2.6" do
+  describe "Array#[]= with [m..]" do
+
+    it "just sets the section defined by range to nil even if the rhs is nil" do
+      a = [1, 2, 3, 4, 5]
+      a[eval("(2..)")] = nil
+      a.should == [1, 2, nil]
+    end
+
+    it "just sets the section defined by range to nil if m and n < 0 and the rhs is nil" do
+      a = [1, 2, 3, 4, 5]
+      a[eval("(-3..)")] = nil
+      a.should == [1, 2, nil]
+    end
+
+    it "replaces the section defined by range" do
+      a = [6, 5, 4, 3, 2, 1]
+      a[eval("(3...)")] = 9
+      a.should == [6, 5, 4, 9]
+      a[eval("(2..)")] = [7, 7, 7]
+      a.should == [6, 5, 7, 7, 7]
+    end
+
+    it "replaces the section if m and n < 0" do
+      a = [1, 2, 3, 4, 5]
+      a[eval("(-3..)")] = [7, 8, 9]
+      a.should == [1, 2, 7, 8, 9]
+    end
+
+    it "inserts at the end if m > the array size" do
+      a = [1, 2, 3]
+      a[eval("(3..)")] = [4]
+      a.should == [1, 2, 3, 4]
+      a[eval("(5..)")] = [6]
+      a.should == [1, 2, 3, 4, nil, 6]
+    end
+  end
+end
+
 describe "Array#[] after a shift" do
   it "works for insertion" do
     a = [1,2]