1 files changed, 144 insertions, 0 deletions
diff --git a/spec/ruby/core/array/shared/inspect.rb b/spec/ruby/core/array/shared/inspect.rb
new file mode 100644
index 0000000000..6a60781b45
--- /dev/null
+++ b/spec/ruby/core/array/shared/inspect.rb
@@ -0,0 +1,144 @@
+require File.expand_path('../../fixtures/encoded_strings', __FILE__)
+
+describe :array_inspect, shared: true do
+  it "returns a string" do
+    [1, 2, 3].send(@method).should be_an_instance_of(String)
+  end
+
+  it "returns '[]' for an empty Array" do
+    [].send(@method).should == "[]"
+  end
+
+  it "calls inspect on its elements and joins the results with commas" do
+    items = Array.new(3) do |i|
+      obj = mock(i.to_s)
+      obj.should_receive(:inspect).and_return(i.to_s)
+      obj
+    end
+    items.send(@method).should == "[0, 1, 2]"
+  end
+
+  it "does not call #to_s on a String returned from #inspect" do
+    str = "abc"
+    str.should_not_receive(:to_s)
+
+    [str].send(@method).should == '["abc"]'
+  end
+
+  it "calls #to_s on the object returned from #inspect if the Object isn't a String" do
+    obj = mock("Array#inspect/to_s calls #to_s")
+    obj.should_receive(:inspect).and_return(obj)
+    obj.should_receive(:to_s).and_return("abc")
+
+    [obj].send(@method).should == "[abc]"
+  end
+
+  it "does not call #to_str on the object returned from #inspect when it is not a String" do
+    obj = mock("Array#inspect/to_s does not call #to_str")
+    obj.should_receive(:inspect).and_return(obj)
+    obj.should_not_receive(:to_str)
+
+    [obj].send(@method).should =~ /^\[#<MockObject:0x[0-9a-f]+>\]$/
+  end
+
+  it "does not call #to_str on the object returned from #to_s when it is not a String" do
+    obj = mock("Array#inspect/to_s does not call #to_str on #to_s result")
+    obj.should_receive(:inspect).and_return(obj)
+    obj.should_receive(:to_s).and_return(obj)
+    obj.should_not_receive(:to_str)
+
+    [obj].send(@method).should =~ /^\[#<MockObject:0x[0-9a-f]+>\]$/
+  end
+
+  it "does not swallow exceptions raised by #to_s" do
+    obj = mock("Array#inspect/to_s does not swallow #to_s exceptions")
+    obj.should_receive(:inspect).and_return(obj)
+    obj.should_receive(:to_s).and_raise(Exception)
+
+    lambda { [obj].send(@method) }.should raise_error(Exception)
+  end
+
+  it "represents a recursive element with '[...]'" do
+    ArraySpecs.recursive_array.send(@method).should == "[1, \"two\", 3.0, [...], [...], [...], [...], [...]]"
+    ArraySpecs.head_recursive_array.send(@method).should == "[[...], [...], [...], [...], [...], 1, \"two\", 3.0]"
+    ArraySpecs.empty_recursive_array.send(@method).should == "[[...]]"
+  end
+
+  it "taints the result if the Array is non-empty and tainted" do
+    [1, 2].taint.send(@method).tainted?.should be_true
+  end
+
+  it "does not taint the result if the Array is tainted but empty" do
+    [].taint.send(@method).tainted?.should be_false
+  end
+
+  it "taints the result if an element is tainted" do
+    ["str".taint].send(@method).tainted?.should be_true
+  end
+
+  it "untrusts the result if the Array is untrusted" do
+    [1, 2].untrust.send(@method).untrusted?.should be_true
+  end
+
+  it "does not untrust the result if the Array is untrusted but empty" do
+    [].untrust.send(@method).untrusted?.should be_false
+  end
+
+  it "untrusts the result if an element is untrusted" do
+    ["str".untrust].send(@method).untrusted?.should be_true
+  end
+
+  describe "with encoding" do
+    before :each do
+      @default_external_encoding = Encoding.default_external
+    end
+
+    after :each do
+      Encoding.default_external = @default_external_encoding
+    end
+
+    it "returns a US-ASCII string for an empty Array" do
+      [].send(@method).encoding.should == Encoding::US_ASCII
+    end
+
+    it "use the default external encoding if it is ascii compatible" do
+      Encoding.default_external = Encoding.find('UTF-8')
+
+      utf8 = "utf8".encode("UTF-8")
+      jp   = "jp".encode("EUC-JP")
+      array = [jp, utf8]
+
+      array.send(@method).encoding.name.should == "UTF-8"
+    end
+
+    it "use US-ASCII encoding if the default external encoding is not ascii compatible" do
+      Encoding.default_external = Encoding.find('UTF-32')
+
+      utf8 = "utf8".encode("UTF-8")
+      jp   = "jp".encode("EUC-JP")
+      array = [jp, utf8]
+
+      array.send(@method).encoding.name.should == "US-ASCII"
+    end
+
+    ruby_version_is ''...'2.3' do
+      it "raises if inspected result is not default external encoding" do
+        utf_16be = mock("utf_16be")
+        utf_16be.should_receive(:inspect).and_return(%<"utf_16be \u3042">.encode!(Encoding::UTF_16BE))
+
+        lambda {
+          [utf_16be].send(@method)
+        }.should raise_error(Encoding::CompatibilityError)
+      end
+    end
+
+    ruby_version_is '2.3' do
+      it "does not raise if inspected result is not default external encoding" do
+        utf_16be = mock("utf_16be")
+        utf_16be.should_receive(:inspect).and_return(%<"utf_16be \u3042">.encode!(Encoding::UTF_16BE))
+
+        [utf_16be].send(@method).should == '["utf_16be \u3042"]'
+      end
+    end
+  end
+end