YAML fixes

spec/std/yaml/from_yaml_spec.cr

@@ -0,0 +1,359 @@
+require "spec"
+require "yaml"
+
+private struct ObjectStub
+  getter called : Bool
+
+  def self.new(pull : YAML::PullParser)
+    pull.read_scalar
+    new(true)
+  end
+
+  def initialize(@called)
+  end
+end
+
+describe "Object.from_yaml" do
+  it "should create call .new on with a YAML::PullParser" do
+    ObjectStub.from_yaml("hello").called.should be_true
+  end
+end
+
+describe "Nil.from_yaml" do
+  it "should serialize and deserialize" do
+    Nil.from_yaml(nil.to_yaml).should eq nil
+  end
+
+  values = {"", "NULL", "Null", "null", "~"}
+
+  values.each do |value|
+    it %(zshould return nil if "#{value}") do
+      # Test will an array since a standalone empty value shows as STREAM_END
+      Array(Nil).from_yaml("- " + value).should eq [nil]
+    end
+  end
+
+  values.each do |value|
+    it %(should raise if "#{value}" is quoted with double quotes) do
+      expect_raises(YAML::ParseException) do
+        Nil.from_yaml %("#{value}")
+      end
+    end
+
+    it %(should raise if "#{value}" is quoted with single quotes) do
+      expect_raises(YAML::ParseException) do
+        Nil.from_yaml "'#{value}'"
+      end
+    end
+
+    it "should raise if not a null value" do
+      expect_raises(YAML::ParseException) do
+        Nil.from_yaml "hello"
+      end
+    end
+  end
+
+  describe "Bool.from_yaml" do
+    describe "true values" do
+      it "should serialize and deserialize" do
+        Bool.from_yaml(true.to_yaml).should eq true
+      end
+
+      values = {"true", "True", "TRUE", "on", "On", "ON", "y", "Y", "yes", "Yes", "YES"}
+
+      values.each do |value|
+        it %(should return true if "#{value}") do
+          Bool.from_yaml(value).should eq true
+        end
+
+        it %(should raise if "#{value}" is quoted with double quotes) do
+          expect_raises(YAML::ParseException) do
+            Bool.from_yaml %("#{value}")
+          end
+        end
+
+        it %(should raise if "#{value}" is quoted with single quotes) do
+          expect_raises(YAML::ParseException) do
+            Bool.from_yaml "'#{value}'"
+          end
+        end
+      end
+    end
+  end
+
+  describe "false values" do
+    it "should serialize and deserialize" do
+      Bool.from_yaml(false.to_yaml).should eq false
+    end
+
+    values = {"false", "False", "FALSE", "off", "Off", "OFF", "n", "N", "no", "No", "NO"}
+
+    values.each do |value|
+      it %(should return false if "#{value}") do
+        Bool.from_yaml(value).should eq false
+      end
+
+      it %(should raise if "#{value}" is quoted with double quotes) do
+        expect_raises(YAML::ParseException) do
+          Bool.from_yaml %("#{value}")
+        end
+      end
+
+      it %(should raise if "#{value}" is quoted with single quotes) do
+        expect_raises(YAML::ParseException) do
+          Bool.from_yaml "'#{value}'"
+        end
+      end
+    end
+  end
+
+  it "should raise if not a bool value" do
+    expect_raises(YAML::ParseException) do
+      Bool.from_yaml "hello"
+    end
+  end
+end
+
+[Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64].each do |type|
+  describe "#{type.name}.from_yaml" do
+    it "should serialize and deserialize" do
+      type.from_yaml(type.new("1").to_yaml).should eq type.new("1")
+    end
+
+    it "should parse a number into an #{type.name}" do
+      type.from_yaml(type.new("1").to_yaml).should eq type.new("1")
+    end
+
+    it "should raise if quoted with double quotes" do
+      expect_raises(YAML::ParseException) do
+        type.from_yaml %("1")
+      end
+    end
+
+    it "should raise if quoted with single quotes" do
+      expect_raises(YAML::ParseException) do
+        type.from_yaml "'1'"
+      end
+    end
+
+    it "should raise when not a number" do
+      expect_raises(YAML::ParseException) do
+        type.from_yaml("hi")
+      end
+    end
+  end
+end
+
+[Float32, Float64].each do |type|
+  describe "#{type.name}.from_yaml" do
+    it "should serialize and deserialize" do
+      type.from_yaml(type.new("1.0").to_yaml).should eq type.new("1.0")
+    end
+
+    it "should parse a number into an {{type.id}}" do
+      type.from_yaml("1").should eq type.new("1")
+    end
+
+    it "should parse a float into an {{type.id}}" do
+      type.from_yaml("1.1").should eq type.new("1.1")
+    end
+
+    it "should raise if quoted with double quotes" do
+      expect_raises(YAML::ParseException) do
+        type.from_yaml %("1.1")
+      end
+    end
+
+    it "should raise if quoted with single quotes" do
+      expect_raises(YAML::ParseException) do
+        type.from_yaml "'1.1'"
+      end
+    end
+
+    it "should raise when not a float or number" do
+      expect_raises(YAML::ParseException) do
+        type.from_yaml("hi")
+      end
+    end
+  end
+end
+
+describe "String.from_yaml" do
+  it "should serialize and deserialize" do
+    String.from_yaml("hi".to_yaml).should eq "hi"
+  end
+
+  it "should parse a string" do
+    String.from_yaml("hello").should eq "hello"
+  end
+
+  it "should parse a single quoted string" do
+    String.from_yaml("'hello'").should eq "hello"
+  end
+
+  it "should parse a double quoted string" do
+    String.from_yaml(%("hello")).should eq "hello"
+  end
+
+  it "should parse a literal string" do
+    String.from_yaml("|\n  hello").should eq "hello"
+  end
+
+  it "should parse a folded string" do
+    String.from_yaml(">\n  hello").should eq "hello"
+  end
+
+  context "reserved values" do
+    values = {
+      "true", "True", "TRUE", "on", "On", "ON", "y", "Y", "yes", "Yes", "YES",
+      "false", "False", "FALSE", "off", "Off", "OFF", "n", "N", "no", "No", "NO",
+      "", "NULL", "Null", "null", "~",
+      ".inf", ".Inf", ".INF", "+.inf", "+.Inf", "+.INF",
+      "-.inf", "-.Inf", "-.INF",
+      ".nan", ".NaN", ".NAN",
+      "+1", "1", "-1",
+      "1.1", "+1.1", "-1.1",
+      "0x_0A_74_AE", "0b1010_0111_0100_1010_1110", "02472256",
+      "2001-12-15T02:59:43.1Z",
+    }
+    values.each do |value|
+      it %(should raise if a reserved value "#{value}") do
+        expect_raises(YAML::ParseException) do
+          String.from_yaml(value)
+        end
+      end
+
+      it "should parse if a reserved value is quoted with double quotes" do
+        String.from_yaml(%("#{value}")).should eq value
+      end
+
+      it "should parse if a reserved value is quoted with single quotes" do
+        String.from_yaml("'#{value}'").should eq value
+      end
+    end
+  end
+end
+
+describe "Array.from_yaml" do
+  it "should serialize and deserialize" do
+    Array(String).from_yaml(["hi"].to_yaml).should eq ["hi"]
+  end
+
+  it "it should an array of the correct objects" do
+    result = Array(String).from_yaml <<-YAML
+      - one
+      - two
+      - three
+    YAML
+    result.should eq ["one", "two", "three"]
+  end
+
+  context "with a union type" do
+    it "it should an array of the correct objects" do
+      result = Array(String | Int32 | Float64).from_yaml <<-YAML
+        - one
+        - 1
+        - 1.0
+      YAML
+      result.should eq ["one", 1, 1.0]
+    end
+  end
+end
+
+describe "Hash.from_yaml" do
+  it "should serialize and deserialize" do
+    Hash(String, String).from_yaml({"hello" => "world"}.to_yaml).should eq ({"hello" => "world"})
+  end
+
+  it "it should an array of the correct objects" do
+    result = Hash(String, String).from_yaml <<-YAML
+      foo: one
+      bar: two
+      baz: three
+    YAML
+    result.should eq ({"foo" => "one", "bar" => "two", "baz" => "three"})
+  end
+
+  context "with a union type" do
+    it "it should an array of the correct objects" do
+      result = Hash(String, String | Int32 | Float64).from_yaml <<-YAML
+        foo: 1
+        bar: two
+        baz: 3.0
+      YAML
+      result.should eq ({"foo" => 1, "bar" => "two", "baz" => 3.0})
+    end
+  end
+end
+
+describe "Tuple.from_yaml" do
+  it "should serialize and deserialize" do
+    Tuple(String, String).from_yaml({"hello", "world"}.to_yaml).should eq ({"hello", "world"})
+  end
+
+  it "it should an array of the correct objects" do
+    result = Tuple(String, String, String).from_yaml "- one\n- two\n- three"
+    result.should eq ({"one", "two", "three"})
+  end
+
+  context "with a union type" do
+    it "it should an array of the correct objects" do
+      result = Tuple(String | Int32 | Float64, String | Int32 | Float64, String | Int32 | Float64).from_yaml "- one\n- 1\n- 1.0"
+      result.should eq ({"one", 1, 1.0})
+    end
+  end
+end
+
+describe "NamedTuple.from_yaml" do
+  it "it should an array of the correct objects" do
+    result = NamedTuple(foo: String, bar: String, baz: String).from_yaml "foo: one\nbar: two\nbaz: three"
+    result.should eq ({foo: "one", bar: "two", baz: "three"})
+  end
+end
+
+enum TestEnum
+  Red
+  Green
+  Blue
+end
+
+describe "Enum.from_yaml" do
+  it "should serialize and deserialize" do
+    TestEnum.from_yaml(TestEnum::Red.to_yaml).should eq TestEnum::Red
+  end
+
+  it "should parse from string" do
+    TestEnum.from_yaml("red").should eq TestEnum::Red
+  end
+
+  it "should parse from int" do
+    TestEnum.from_yaml("1").should eq TestEnum::Green
+  end
+end
+
+describe "Union.from_yaml" do
+  it "should compile into any of the types" do
+    (Bool | Int32).from_yaml("true").should eq true
+    (Bool | Int32).from_yaml("1").should eq 1
+  end
+
+  it "should raise if not a unions type" do
+    expect_raises(YAML::ParseException) do
+      (Bool | Int32).from_yaml("foo")
+    end
+  end
+end
+
+describe "Time.from_yaml" do
+  it "should parse time" do
+    time = Time.now
+    time_string = Time::Format::ISO_8601_DATE_TIME.format(time)
+    Time.from_yaml(time_string).epoch.should eq time.epoch
+  end
+
+  it "should not parse an invalid time string" do
+    expect_raises(YAML::ParseException) do
+      Time.from_yaml("not a time")
+    end
+  end
+end

spec/std/yaml/serialization_spec.cr

@@ -127,7 +127,7 @@ describe "YAML serialization" do
             ]
             YAML
         end
-        ex.message.should eq("Expected nil, not 1 at line 2, column 3")
+        ex.message.should eq("Expected null, not '1' at line 2, column 3")
         ex.location.should eq({2, 3})
       end