Add stringification for HTTP::Cookie

spec/std/http/cookie_spec.cr

@@ -1,6 +1,7 @@
 require "spec"
 require "http/cookie"
 require "http/headers"
+require "spec/helpers/string"
 
 private def parse_first_cookie(header)
   cookies = HTTP::Cookie::Parser.parse_cookies(header)
@@ -145,24 +146,38 @@ module HTTP
     end
 
     describe "#to_set_cookie_header" do
-      it { HTTP::Cookie.new("x", "v$1").to_set_cookie_header.should eq "x=v$1" }
+      it { assert_prints HTTP::Cookie.new("x", "v$1").to_set_cookie_header, "x=v$1" }
 
-      it { HTTP::Cookie.new("x", "seven", domain: "127.0.0.1").to_set_cookie_header.should eq "x=seven; domain=127.0.0.1" }
+      it { assert_prints HTTP::Cookie.new("x", "seven", domain: "127.0.0.1").to_set_cookie_header, "x=seven; domain=127.0.0.1" }
 
-      it { HTTP::Cookie.new("x", "y", path: "/").to_set_cookie_header.should eq "x=y; path=/" }
-      it { HTTP::Cookie.new("x", "y", path: "/example").to_set_cookie_header.should eq "x=y; path=/example" }
+      it { assert_prints HTTP::Cookie.new("x", "y", path: "/").to_set_cookie_header, "x=y; path=/" }
+      it { assert_prints HTTP::Cookie.new("x", "y", path: "/example").to_set_cookie_header, "x=y; path=/example" }
 
-      it { HTTP::Cookie.new("x", "expiring", expires: Time.unix(1257894000)).to_set_cookie_header.should eq "x=expiring; expires=Tue, 10 Nov 2009 23:00:00 GMT" }
-      it { HTTP::Cookie.new("x", "expiring-1601", expires: Time.utc(1601, 1, 1, 1, 1, 1, nanosecond: 1)).to_set_cookie_header.should eq "x=expiring-1601; expires=Mon, 01 Jan 1601 01:01:01 GMT" }
+      it { assert_prints HTTP::Cookie.new("x", "expiring", expires: Time.unix(1257894000)).to_set_cookie_header, "x=expiring; expires=Tue, 10 Nov 2009 23:00:00 GMT" }
+      it { assert_prints HTTP::Cookie.new("x", "expiring-1601", expires: Time.utc(1601, 1, 1, 1, 1, 1, nanosecond: 1)).to_set_cookie_header, "x=expiring-1601; expires=Mon, 01 Jan 1601 01:01:01 GMT" }
 
       it "samesite" do
-        HTTP::Cookie.new("x", "samesite-default", samesite: nil).to_set_cookie_header.should eq "x=samesite-default"
-        HTTP::Cookie.new("x", "samesite-lax", samesite: :lax).to_set_cookie_header.should eq "x=samesite-lax; SameSite=Lax"
-        HTTP::Cookie.new("x", "samesite-strict", samesite: :strict).to_set_cookie_header.should eq "x=samesite-strict; SameSite=Strict"
-        HTTP::Cookie.new("x", "samesite-none", samesite: :none).to_set_cookie_header.should eq "x=samesite-none; SameSite=None"
+        assert_prints HTTP::Cookie.new("x", "samesite-default", samesite: nil).to_set_cookie_header, "x=samesite-default"
+        assert_prints HTTP::Cookie.new("x", "samesite-lax", samesite: :lax).to_set_cookie_header, "x=samesite-lax; SameSite=Lax"
+        assert_prints HTTP::Cookie.new("x", "samesite-strict", samesite: :strict).to_set_cookie_header, "x=samesite-strict; SameSite=Strict"
+        assert_prints HTTP::Cookie.new("x", "samesite-none", samesite: :none).to_set_cookie_header, "x=samesite-none; SameSite=None"
       end
 
-      it { HTTP::Cookie.new("empty-value", "").to_set_cookie_header.should eq "empty-value=" }
+      it { assert_prints HTTP::Cookie.new("empty-value", "").to_set_cookie_header, "empty-value=" }
+    end
+
+    describe "#to_s" do
+      it "stringifies" do
+        HTTP::Cookie.new("foo", "bar").to_s.should eq "foo=bar"
+        HTTP::Cookie.new("x", "y", domain: "example.com", path: "/foo", expires: Time.unix(1257894000), samesite: :lax).to_s.should eq "x=y; domain=example.com; path=/foo; expires=Tue, 10 Nov 2009 23:00:00 GMT; SameSite=Lax"
+      end
+    end
+
+    describe "#inspect" do
+      it "stringifies" do
+        HTTP::Cookie.new("foo", "bar").inspect.should eq %(HTTP::Cookie["foo=bar"])
+        HTTP::Cookie.new("x", "y", domain: "example.com", path: "/foo", expires: Time.unix(1257894000), samesite: :lax).inspect.should eq %(HTTP::Cookie["x=y; domain=example.com; path=/foo; expires=Tue, 10 Nov 2009 23:00:00 GMT; SameSite=Lax"])
+      end
     end
 
     describe "#valid? & #validate!" do

src/http/cookie.cr

@@ -104,31 +104,82 @@ module HTTP
       end
     end
 
+    # Returns an unambiguous string representation of this cookie.
+    #
+    # It uses the `Set-Cookie` serialization from `#to_set_cookie_header` which
+    # represents the full state of the cookie.
+    #
+    # ```
+    # HTTP::Cookie.new("foo", "bar").inspect                        # => HTTP::Cookie["foo=bar"]
+    # HTTP::Cookie.new("foo", "bar", domain: "example.com").inspect # => HTTP::Cookie["foo=bar; domain=example.com"]
+    # ```
+    def inspect(io : IO) : Nil
+      io << "HTTP::Cookie["
+      to_s.inspect(io)
+      io << "]"
+    end
+
+    # Returns a string representation of this cookie.
+    #
+    # It uses the `Set-Cookie` serialization from `#to_set_cookie_header` which
+    # represents the full state of the cookie.
+    #
+    # ```
+    # HTTP::Cookie.new("foo", "bar").to_s                        # => "foo=bar"
+    # HTTP::Cookie.new("foo", "bar", domain: "example.com").to_s # => "foo=bar; domain=example.com"
+    # ```
+    def to_s(io : IO) : Nil
+      to_set_cookie_header(io)
+    end
+
+    # Returns a string representation of this cookie in the format used by the
+    # `Set-Cookie` header of an HTTP response.
+    #
+    # ```
+    # HTTP::Cookie.new("foo", "bar").to_set_cookie_header                        # => "foo=bar"
+    # HTTP::Cookie.new("foo", "bar", domain: "example.com").to_set_cookie_header # => "foo=bar; domain=example.com"
+    # ```
     def to_set_cookie_header : String
+      String.build do |header|
+        to_set_cookie_header(header)
+      end
+    end
+
+    # :ditto:
+    def to_set_cookie_header(io : IO) : Nil
       path = @path
       expires = @expires
       max_age = @max_age
       domain = @domain
       samesite = @samesite
-      String.build do |header|
-        to_cookie_header(header)
-        header << "; domain=#{domain}" if domain
-        header << "; path=#{path}" if path
-        header << "; expires=#{HTTP.format_time(expires)}" if expires
-        header << "; max-age=#{max_age.to_i}" if max_age
-        header << "; Secure" if @secure
-        header << "; HttpOnly" if @http_only
-        header << "; SameSite=#{samesite}" if samesite
-        header << "; #{@extension}" if @extension
-      end
-    end
 
+      to_cookie_header(io)
+      io << "; domain=#{domain}" if domain
+      io << "; path=#{path}" if path
+      io << "; expires=#{HTTP.format_time(expires)}" if expires
+      io << "; max-age=#{max_age.to_i}" if max_age
+      io << "; Secure" if @secure
+      io << "; HttpOnly" if @http_only
+      io << "; SameSite=#{samesite}" if samesite
+      io << "; #{@extension}" if @extension
+    end
+
+    # Returns a string representation of this cookie in the format used by the
+    # `Cookie` header of an HTTP request.
+    # This includes only the `#name` and `#value`. All other attributes are left
+    # out.
+    #
+    # ```
+    # HTTP::Cookie.new("foo", "bar").to_cookie_header                        # => "foo=bar"
+    # HTTP::Cookie.new("foo", "bar", domain: "example.com").to_cookie_header # => "foo=bar
+    # ```
     def to_cookie_header : String
       String.build(@name.bytesize + @value.bytesize + 1) do |io|
         to_cookie_header(io)
       end
     end
 
+    # :ditto:
     def to_cookie_header(io) : Nil
       io << @name
       io << '='