1 files changed, 31 insertions, 13 deletions
diff --git a/spec/ruby/core/string/inspect_spec.rb b/spec/ruby/core/string/inspect_spec.rb
index 8ddbae132a..8b91ce2f84 100644
--- a/spec/ruby/core/string/inspect_spec.rb
+++ b/spec/ruby/core/string/inspect_spec.rb
@@ -3,20 +3,8 @@ require_relative '../../spec_helper'
 require_relative 'fixtures/classes'
 
 describe "String#inspect" do
-  ruby_version_is ''...'2.7' do
-    it "taints the result if self is tainted" do
-      "foo".taint.inspect.tainted?.should == true
-      "foo\n".taint.inspect.tainted?.should == true
-    end
-
-    it "untrusts the result if self is untrusted" do
-      "foo".untrust.inspect.untrusted?.should == true
-      "foo\n".untrust.inspect.untrusted?.should == true
-    end
-  end
-
   it "does not return a subclass instance" do
-    StringSpecs::MyString.new.inspect.should be_an_instance_of(String)
+    StringSpecs::MyString.new.inspect.should.instance_of?(String)
   end
 
   it "returns a string with special characters replaced with \\<char> notation" do
@@ -31,6 +19,21 @@ describe "String#inspect" do
     ].should be_computed_by(:inspect)
   end
 
+  it "returns a string with special characters replaced with \\<char> notation for UTF-16" do
+    pairs = [
+      ["\a", '"\\a"'],
+      ["\b", '"\\b"'],
+      ["\t", '"\\t"'],
+      ["\n", '"\\n"'],
+      ["\v", '"\\v"'],
+      ["\f", '"\\f"'],
+      ["\r", '"\\r"'],
+      ["\e", '"\\e"']
+    ].map { |str, result| [str.encode('UTF-16LE'), result] }
+
+    pairs.should be_computed_by(:inspect)
+  end
+
   it "returns a string with \" and \\ escaped with a backslash" do
     [ ["\"", '"\\""'],
       ["\\", '"\\\\"']
@@ -319,6 +322,15 @@ describe "String#inspect" do
     0.chr.inspect.should == '"\\x00"'
   end
 
+  it "uses \\x notation for broken UTF-8 sequences" do
+    "\xF0\x9F".inspect.should == '"\\xF0\\x9F"'
+  end
+
+  it "works for broken US-ASCII strings" do
+    s = "©".dup.force_encoding("US-ASCII")
+    s.inspect.should == '"\xC2\xA9"'
+  end
+
   describe "when default external is UTF-8" do
     before :each do
       @extenc, Encoding.default_external = Encoding.default_external, Encoding::UTF_8
@@ -498,5 +510,11 @@ describe "String#inspect" do
         "\u{3042}".encode("EUC-JP").inspect.should == '"\\x{A4A2}"'
       end
     end
+
+    describe "and the string has both ASCII-compatible and ASCII-incompatible chars" do
+      it "returns a string with the non-ASCII characters replaced by \\u notation" do
+        "hello привет".encode("utf-16le").inspect.should == '"hello \\u043F\\u0440\\u0438\\u0432\\u0435\\u0442"'
+      end
+    end
   end
 end