Array + Hash shared/nested specs for #fetch_path

spec/core_ext/shared/nested_spec.rb

@@ -9,6 +9,33 @@
       ]
     }
 
+    context "#fetch_path" do
+      it "on a empty existing nested hash" do
+        expect(array.fetch_path(0, "a")).to be_nil
+        expect(array.fetch_path(0, 1)).to   be_nil
+      end
+
+      it "on a existing nested hash" do
+        expect(array.fetch_path(1, :a)).to be_nil
+        expect(array.fetch_path(1, :b)).to eq("b")
+        expect(array.fetch_path(1, :c)).to be_nil
+      end
+
+      it "on a deeply nested hash" do
+        expect(array.fetch_path(2, 1)).to eq(1)
+        expect(array.fetch_path(2, 2)).to eq(2 => 2)
+        expect(array.fetch_path(2, 2, 2)).to eq(2)
+        expect(array.fetch_path(2, 3)).to be_nil
+        expect(array.fetch_path(2, 2, 3)).to be_nil
+      end
+
+      it "on a deeply nested hash/array" do
+        expect(array.fetch_path(3, "a", 0, "a1")).to eq(1)
+        expect(array.fetch_path(3, "a", 1, "a2")).to eq(2)
+        expect(array.fetch_path(3, "a", 2, "a3")).to be_nil
+      end
+    end
+
     context "#store_path" do
       it "on a empty existing nested hash" do
         array.store_path(0, "a", 1)
@@ -61,6 +88,31 @@
       }
     }
 
+    context "#fetch_path" do
+      it "on a empty existing nested array" do
+        expect(hash.fetch_path("a", 0)).to    be_nil
+        expect(hash.fetch_path("a", 0, 0)).to be_nil
+      end
+
+      it "on a existing nested array" do
+        expect(hash.fetch_path("b", 0)).to    eq(1)
+        expect(hash.fetch_path("b", 2)).to    eq(3)
+        expect(hash.fetch_path("b", 3)).to    be_nil
+        expect(hash.fetch_path("b", 0, 0)).to be_nil
+      end
+
+      it "on a deeply nested array" do
+        expect(hash.fetch_path("c", 1, 0)).to eq(2)
+        expect(hash.fetch_path("c", 1, 1)).to eq(3)
+      end
+
+      it "on a deeply nested hash/array" do
+        expect(hash.fetch_path("d", 1, "2")).to    eq(2)
+        expect(hash.fetch_path("d", 1, "3", 2)).to eq(3)
+        expect(hash.fetch_path("d", 1, "3", 4)).to be_nil
+      end
+    end
+
     context "#store_path" do
       it "on a empty existing nested array" do
         hash.store_path("a", 0, 1)