Update the yaml for go lib to latest

Update yaml for go lib to latest and it's license has been changed
to Apache 2.
According to the upstream project, the license of go-yaml has been
updated to Apache 2:https://github.com/go-yaml/yaml/blob/v2/LICENSE,
change the reference code license within oom-registrator repo accordingly.

Issue-Id: OOM-365
Change-Id: Idce4bfda96456031a296682b0fb6e663170ec099
Signed-off-by: HuabingZhao <zhao.huabing@zte.com.cn>

1 files changed, 1017 insertions, 0 deletions

diff --git a/src/kube2msb/vendor/gopkg.in/yaml.v2/decode_test.go b/src/kube2msb/vendor/gopkg.in/yaml.v2/decode_test.go
new file mode 100644
index 0000000..713b1ee
--- /dev/null
+++ b/src/kube2msb/vendor/gopkg.in/yaml.v2/decode_test.go
@@ -0,0 +1,1017 @@
+package yaml_test
+
+import (
+	"errors"
+	. "gopkg.in/check.v1"
+	"gopkg.in/yaml.v2"
+	"math"
+	"net"
+	"reflect"
+	"strings"
+	"time"
+)
+
+var unmarshalIntTest = 123
+
+var unmarshalTests = []struct {
+	data  string
+	value interface{}
+}{
+	{
+		"",
+		&struct{}{},
+	}, {
+		"{}", &struct{}{},
+	}, {
+		"v: hi",
+		map[string]string{"v": "hi"},
+	}, {
+		"v: hi", map[string]interface{}{"v": "hi"},
+	}, {
+		"v: true",
+		map[string]string{"v": "true"},
+	}, {
+		"v: true",
+		map[string]interface{}{"v": true},
+	}, {
+		"v: 10",
+		map[string]interface{}{"v": 10},
+	}, {
+		"v: 0b10",
+		map[string]interface{}{"v": 2},
+	}, {
+		"v: 0xA",
+		map[string]interface{}{"v": 10},
+	}, {
+		"v: 4294967296",
+		map[string]int64{"v": 4294967296},
+	}, {
+		"v: 0.1",
+		map[string]interface{}{"v": 0.1},
+	}, {
+		"v: .1",
+		map[string]interface{}{"v": 0.1},
+	}, {
+		"v: .Inf",
+		map[string]interface{}{"v": math.Inf(+1)},
+	}, {
+		"v: -.Inf",
+		map[string]interface{}{"v": math.Inf(-1)},
+	}, {
+		"v: -10",
+		map[string]interface{}{"v": -10},
+	}, {
+		"v: -.1",
+		map[string]interface{}{"v": -0.1},
+	},
+
+	// Simple values.
+	{
+		"123",
+		&unmarshalIntTest,
+	},
+
+	// Floats from spec
+	{
+		"canonical: 6.8523e+5",
+		map[string]interface{}{"canonical": 6.8523e+5},
+	}, {
+		"expo: 685.230_15e+03",
+		map[string]interface{}{"expo": 685.23015e+03},
+	}, {
+		"fixed: 685_230.15",
+		map[string]interface{}{"fixed": 685230.15},
+	}, {
+		"neginf: -.inf",
+		map[string]interface{}{"neginf": math.Inf(-1)},
+	}, {
+		"fixed: 685_230.15",
+		map[string]float64{"fixed": 685230.15},
+	},
+	//{"sexa: 190:20:30.15", map[string]interface{}{"sexa": 0}}, // Unsupported
+	//{"notanum: .NaN", map[string]interface{}{"notanum": math.NaN()}}, // Equality of NaN fails.
+
+	// Bools from spec
+	{
+		"canonical: y",
+		map[string]interface{}{"canonical": true},
+	}, {
+		"answer: NO",
+		map[string]interface{}{"answer": false},
+	}, {
+		"logical: True",
+		map[string]interface{}{"logical": true},
+	}, {
+		"option: on",
+		map[string]interface{}{"option": true},
+	}, {
+		"option: on",
+		map[string]bool{"option": true},
+	},
+	// Ints from spec
+	{
+		"canonical: 685230",
+		map[string]interface{}{"canonical": 685230},
+	}, {
+		"decimal: +685_230",
+		map[string]interface{}{"decimal": 685230},
+	}, {
+		"octal: 02472256",
+		map[string]interface{}{"octal": 685230},
+	}, {
+		"hexa: 0x_0A_74_AE",
+		map[string]interface{}{"hexa": 685230},
+	}, {
+		"bin: 0b1010_0111_0100_1010_1110",
+		map[string]interface{}{"bin": 685230},
+	}, {
+		"bin: -0b101010",
+		map[string]interface{}{"bin": -42},
+	}, {
+		"decimal: +685_230",
+		map[string]int{"decimal": 685230},
+	},
+
+	//{"sexa: 190:20:30", map[string]interface{}{"sexa": 0}}, // Unsupported
+
+	// Nulls from spec
+	{
+		"empty:",
+		map[string]interface{}{"empty": nil},
+	}, {
+		"canonical: ~",
+		map[string]interface{}{"canonical": nil},
+	}, {
+		"english: null",
+		map[string]interface{}{"english": nil},
+	}, {
+		"~: null key",
+		map[interface{}]string{nil: "null key"},
+	}, {
+		"empty:",
+		map[string]*bool{"empty": nil},
+	},
+
+	// Flow sequence
+	{
+		"seq: [A,B]",
+		map[string]interface{}{"seq": []interface{}{"A", "B"}},
+	}, {
+		"seq: [A,B,C,]",
+		map[string][]string{"seq": []string{"A", "B", "C"}},
+	}, {
+		"seq: [A,1,C]",
+		map[string][]string{"seq": []string{"A", "1", "C"}},
+	}, {
+		"seq: [A,1,C]",
+		map[string][]int{"seq": []int{1}},
+	}, {
+		"seq: [A,1,C]",
+		map[string]interface{}{"seq": []interface{}{"A", 1, "C"}},
+	},
+	// Block sequence
+	{
+		"seq:\n - A\n - B",
+		map[string]interface{}{"seq": []interface{}{"A", "B"}},
+	}, {
+		"seq:\n - A\n - B\n - C",
+		map[string][]string{"seq": []string{"A", "B", "C"}},
+	}, {
+		"seq:\n - A\n - 1\n - C",
+		map[string][]string{"seq": []string{"A", "1", "C"}},
+	}, {
+		"seq:\n - A\n - 1\n - C",
+		map[string][]int{"seq": []int{1}},
+	}, {
+		"seq:\n - A\n - 1\n - C",
+		map[string]interface{}{"seq": []interface{}{"A", 1, "C"}},
+	},
+
+	// Literal block scalar
+	{
+		"scalar: | # Comment\n\n literal\n\n \ttext\n\n",
+		map[string]string{"scalar": "\nliteral\n\n\ttext\n"},
+	},
+
+	// Folded block scalar
+	{
+		"scalar: > # Comment\n\n folded\n line\n \n next\n line\n  * one\n  * two\n\n last\n line\n\n",
+		map[string]string{"scalar": "\nfolded line\nnext line\n * one\n * two\n\nlast line\n"},
+	},
+
+	// Map inside interface with no type hints.
+	{
+		"a: {b: c}",
+		map[interface{}]interface{}{"a": map[interface{}]interface{}{"b": "c"}},
+	},
+
+	// Structs and type conversions.
+	{
+		"hello: world",
+		&struct{ Hello string }{"world"},
+	}, {
+		"a: {b: c}",
+		&struct{ A struct{ B string } }{struct{ B string }{"c"}},
+	}, {
+		"a: {b: c}",
+		&struct{ A *struct{ B string } }{&struct{ B string }{"c"}},
+	}, {
+		"a: {b: c}",
+		&struct{ A map[string]string }{map[string]string{"b": "c"}},
+	}, {
+		"a: {b: c}",
+		&struct{ A *map[string]string }{&map[string]string{"b": "c"}},
+	}, {
+		"a:",
+		&struct{ A map[string]string }{},
+	}, {
+		"a: 1",
+		&struct{ A int }{1},
+	}, {
+		"a: 1",
+		&struct{ A float64 }{1},
+	}, {
+		"a: 1.0",
+		&struct{ A int }{1},
+	}, {
+		"a: 1.0",
+		&struct{ A uint }{1},
+	}, {
+		"a: [1, 2]",
+		&struct{ A []int }{[]int{1, 2}},
+	}, {
+		"a: 1",
+		&struct{ B int }{0},
+	}, {
+		"a: 1",
+		&struct {
+			B int "a"
+		}{1},
+	}, {
+		"a: y",
+		&struct{ A bool }{true},
+	},
+
+	// Some cross type conversions
+	{
+		"v: 42",
+		map[string]uint{"v": 42},
+	}, {
+		"v: -42",
+		map[string]uint{},
+	}, {
+		"v: 4294967296",
+		map[string]uint64{"v": 4294967296},
+	}, {
+		"v: -4294967296",
+		map[string]uint64{},
+	},
+
+	// int
+	{
+		"int_max: 2147483647",
+		map[string]int{"int_max": math.MaxInt32},
+	},
+	{
+		"int_min: -2147483648",
+		map[string]int{"int_min": math.MinInt32},
+	},
+	{
+		"int_overflow: 9223372036854775808", // math.MaxInt64 + 1
+		map[string]int{},
+	},
+
+	// int64
+	{
+		"int64_max: 9223372036854775807",
+		map[string]int64{"int64_max": math.MaxInt64},
+	},
+	{
+		"int64_max_base2: 0b111111111111111111111111111111111111111111111111111111111111111",
+		map[string]int64{"int64_max_base2": math.MaxInt64},
+	},
+	{
+		"int64_min: -9223372036854775808",
+		map[string]int64{"int64_min": math.MinInt64},
+	},
+	{
+		"int64_neg_base2: -0b111111111111111111111111111111111111111111111111111111111111111",
+		map[string]int64{"int64_neg_base2": -math.MaxInt64},
+	},
+	{
+		"int64_overflow: 9223372036854775808", // math.MaxInt64 + 1
+		map[string]int64{},
+	},
+
+	// uint
+	{
+		"uint_min: 0",
+		map[string]uint{"uint_min": 0},
+	},
+	{
+		"uint_max: 4294967295",
+		map[string]uint{"uint_max": math.MaxUint32},
+	},
+	{
+		"uint_underflow: -1",
+		map[string]uint{},
+	},
+
+	// uint64
+	{
+		"uint64_min: 0",
+		map[string]uint{"uint64_min": 0},
+	},
+	{
+		"uint64_max: 18446744073709551615",
+		map[string]uint64{"uint64_max": math.MaxUint64},
+	},
+	{
+		"uint64_max_base2: 0b1111111111111111111111111111111111111111111111111111111111111111",
+		map[string]uint64{"uint64_max_base2": math.MaxUint64},
+	},
+	{
+		"uint64_maxint64: 9223372036854775807",
+		map[string]uint64{"uint64_maxint64": math.MaxInt64},
+	},
+	{
+		"uint64_underflow: -1",
+		map[string]uint64{},
+	},
+
+	// float32
+	{
+		"float32_max: 3.40282346638528859811704183484516925440e+38",
+		map[string]float32{"float32_max": math.MaxFloat32},
+	},
+	{
+		"float32_nonzero: 1.401298464324817070923729583289916131280e-45",
+		map[string]float32{"float32_nonzero": math.SmallestNonzeroFloat32},
+	},
+	{
+		"float32_maxuint64: 18446744073709551615",
+		map[string]float32{"float32_maxuint64": float32(math.MaxUint64)},
+	},
+	{
+		"float32_maxuint64+1: 18446744073709551616",
+		map[string]float32{"float32_maxuint64+1": float32(math.MaxUint64 + 1)},
+	},
+
+	// float64
+	{
+		"float64_max: 1.797693134862315708145274237317043567981e+308",
+		map[string]float64{"float64_max": math.MaxFloat64},
+	},
+	{
+		"float64_nonzero: 4.940656458412465441765687928682213723651e-324",
+		map[string]float64{"float64_nonzero": math.SmallestNonzeroFloat64},
+	},
+	{
+		"float64_maxuint64: 18446744073709551615",
+		map[string]float64{"float64_maxuint64": float64(math.MaxUint64)},
+	},
+	{
+		"float64_maxuint64+1: 18446744073709551616",
+		map[string]float64{"float64_maxuint64+1": float64(math.MaxUint64 + 1)},
+	},
+
+	// Overflow cases.
+	{
+		"v: 4294967297",
+		map[string]int32{},
+	}, {
+		"v: 128",
+		map[string]int8{},
+	},
+
+	// Quoted values.
+	{
+		"'1': '\"2\"'",
+		map[interface{}]interface{}{"1": "\"2\""},
+	}, {
+		"v:\n- A\n- 'B\n\n  C'\n",
+		map[string][]string{"v": []string{"A", "B\nC"}},
+	},
+
+	// Explicit tags.
+	{
+		"v: !!float '1.1'",
+		map[string]interface{}{"v": 1.1},
+	}, {
+		"v: !!null ''",
+		map[string]interface{}{"v": nil},
+	}, {
+		"%TAG !y! tag:yaml.org,2002:\n---\nv: !y!int '1'",
+		map[string]interface{}{"v": 1},
+	},
+
+	// Non-specific tag (Issue #75)
+	{
+		"v: ! test",
+		map[string]interface{}{"v": "test"},
+	},
+
+	// Anchors and aliases.
+	{
+		"a: &x 1\nb: &y 2\nc: *x\nd: *y\n",
+		&struct{ A, B, C, D int }{1, 2, 1, 2},
+	}, {
+		"a: &a {c: 1}\nb: *a",
+		&struct {
+			A, B struct {
+				C int
+			}
+		}{struct{ C int }{1}, struct{ C int }{1}},
+	}, {
+		"a: &a [1, 2]\nb: *a",
+		&struct{ B []int }{[]int{1, 2}},
+	}, {
+		"b: *a\na: &a {c: 1}",
+		&struct {
+			A, B struct {
+				C int
+			}
+		}{struct{ C int }{1}, struct{ C int }{1}},
+	},
+
+	// Bug #1133337
+	{
+		"foo: ''",
+		map[string]*string{"foo": new(string)},
+	}, {
+		"foo: null",
+		map[string]string{"foo": ""},
+	}, {
+		"foo: null",
+		map[string]interface{}{"foo": nil},
+	},
+
+	// Ignored field
+	{
+		"a: 1\nb: 2\n",
+		&struct {
+			A int
+			B int "-"
+		}{1, 0},
+	},
+
+	// Bug #1191981
+	{
+		"" +
+			"%YAML 1.1\n" +
+			"--- !!str\n" +
+			`"Generic line break (no glyph)\n\` + "\n" +
+			` Generic line break (glyphed)\n\` + "\n" +
+			` Line separator\u2028\` + "\n" +
+			` Paragraph separator\u2029"` + "\n",
+		"" +
+			"Generic line break (no glyph)\n" +
+			"Generic line break (glyphed)\n" +
+			"Line separator\u2028Paragraph separator\u2029",
+	},
+
+	// Struct inlining
+	{
+		"a: 1\nb: 2\nc: 3\n",
+		&struct {
+			A int
+			C inlineB `yaml:",inline"`
+		}{1, inlineB{2, inlineC{3}}},
+	},
+
+	// Map inlining
+	{
+		"a: 1\nb: 2\nc: 3\n",
+		&struct {
+			A int
+			C map[string]int `yaml:",inline"`
+		}{1, map[string]int{"b": 2, "c": 3}},
+	},
+
+	// bug 1243827
+	{
+		"a: -b_c",
+		map[string]interface{}{"a": "-b_c"},
+	},
+	{
+		"a: +b_c",
+		map[string]interface{}{"a": "+b_c"},
+	},
+	{
+		"a: 50cent_of_dollar",
+		map[string]interface{}{"a": "50cent_of_dollar"},
+	},
+
+	// Duration
+	{
+		"a: 3s",
+		map[string]time.Duration{"a": 3 * time.Second},
+	},
+
+	// Issue #24.
+	{
+		"a: <foo>",
+		map[string]string{"a": "<foo>"},
+	},
+
+	// Base 60 floats are obsolete and unsupported.
+	{
+		"a: 1:1\n",
+		map[string]string{"a": "1:1"},
+	},
+
+	// Binary data.
+	{
+		"a: !!binary gIGC\n",
+		map[string]string{"a": "\x80\x81\x82"},
+	}, {
+		"a: !!binary |\n  " + strings.Repeat("kJCQ", 17) + "kJ\n  CQ\n",
+		map[string]string{"a": strings.Repeat("\x90", 54)},
+	}, {
+		"a: !!binary |\n  " + strings.Repeat("A", 70) + "\n  ==\n",
+		map[string]string{"a": strings.Repeat("\x00", 52)},
+	},
+
+	// Ordered maps.
+	{
+		"{b: 2, a: 1, d: 4, c: 3, sub: {e: 5}}",
+		&yaml.MapSlice{{"b", 2}, {"a", 1}, {"d", 4}, {"c", 3}, {"sub", yaml.MapSlice{{"e", 5}}}},
+	},
+
+	// Issue #39.
+	{
+		"a:\n b:\n  c: d\n",
+		map[string]struct{ B interface{} }{"a": {map[interface{}]interface{}{"c": "d"}}},
+	},
+
+	// Custom map type.
+	{
+		"a: {b: c}",
+		M{"a": M{"b": "c"}},
+	},
+
+	// Support encoding.TextUnmarshaler.
+	{
+		"a: 1.2.3.4\n",
+		map[string]net.IP{"a": net.IPv4(1, 2, 3, 4)},
+	},
+	{
+		"a: 2015-02-24T18:19:39Z\n",
+		map[string]time.Time{"a": time.Unix(1424801979, 0).In(time.UTC)},
+	},
+
+	// Encode empty lists as zero-length slices.
+	{
+		"a: []",
+		&struct{ A []int }{[]int{}},
+	},
+
+	// UTF-16-LE
+	{
+		"\xff\xfe\xf1\x00o\x00\xf1\x00o\x00:\x00 \x00v\x00e\x00r\x00y\x00 \x00y\x00e\x00s\x00\n\x00",
+		M{"ñoño": "very yes"},
+	},
+	// UTF-16-LE with surrogate.
+	{
+		"\xff\xfe\xf1\x00o\x00\xf1\x00o\x00:\x00 \x00v\x00e\x00r\x00y\x00 \x00y\x00e\x00s\x00 \x00=\xd8\xd4\xdf\n\x00",
+		M{"ñoño": "very yes 🟔"},
+	},
+
+	// UTF-16-BE
+	{
+		"\xfe\xff\x00\xf1\x00o\x00\xf1\x00o\x00:\x00 \x00v\x00e\x00r\x00y\x00 \x00y\x00e\x00s\x00\n",
+		M{"ñoño": "very yes"},
+	},
+	// UTF-16-BE with surrogate.
+	{
+		"\xfe\xff\x00\xf1\x00o\x00\xf1\x00o\x00:\x00 \x00v\x00e\x00r\x00y\x00 \x00y\x00e\x00s\x00 \xd8=\xdf\xd4\x00\n",
+		M{"ñoño": "very yes 🟔"},
+	},
+
+	// YAML Float regex shouldn't match this
+	{
+		"a: 123456e1\n",
+		M{"a": "123456e1"},
+	}, {
+		"a: 123456E1\n",
+		M{"a": "123456E1"},
+	},
+}
+
+type M map[interface{}]interface{}
+
+type inlineB struct {
+	B       int
+	inlineC `yaml:",inline"`
+}
+
+type inlineC struct {
+	C int
+}
+
+func (s *S) TestUnmarshal(c *C) {
+	for i, item := range unmarshalTests {
+		c.Logf("test %d: %q", i, item.data)
+		t := reflect.ValueOf(item.value).Type()
+		var value interface{}
+		switch t.Kind() {
+		case reflect.Map:
+			value = reflect.MakeMap(t).Interface()
+		case reflect.String:
+			value = reflect.New(t).Interface()
+		case reflect.Ptr:
+			value = reflect.New(t.Elem()).Interface()
+		default:
+			c.Fatalf("missing case for %s", t)
+		}
+		err := yaml.Unmarshal([]byte(item.data), value)
+		if _, ok := err.(*yaml.TypeError); !ok {
+			c.Assert(err, IsNil)
+		}
+		if t.Kind() == reflect.String {
+			c.Assert(*value.(*string), Equals, item.value)
+		} else {
+			c.Assert(value, DeepEquals, item.value)
+		}
+	}
+}
+
+func (s *S) TestUnmarshalNaN(c *C) {
+	value := map[string]interface{}{}
+	err := yaml.Unmarshal([]byte("notanum: .NaN"), &value)
+	c.Assert(err, IsNil)
+	c.Assert(math.IsNaN(value["notanum"].(float64)), Equals, true)
+}
+
+var unmarshalErrorTests = []struct {
+	data, error string
+}{
+	{"v: !!float 'error'", "yaml: cannot decode !!str `error` as a !!float"},
+	{"v: [A,", "yaml: line 1: did not find expected node content"},
+	{"v:\n- [A,", "yaml: line 2: did not find expected node content"},
+	{"a: *b\n", "yaml: unknown anchor 'b' referenced"},
+	{"a: &a\n  b: *a\n", "yaml: anchor 'a' value contains itself"},
+	{"value: -", "yaml: block sequence entries are not allowed in this context"},
+	{"a: !!binary ==", "yaml: !!binary value contains invalid base64 data"},
+	{"{[.]}", `yaml: invalid map key: \[\]interface \{\}\{"\."\}`},
+	{"{{.}}", `yaml: invalid map key: map\[interface\ \{\}\]interface \{\}\{".":interface \{\}\(nil\)\}`},
+	{"%TAG !%79! tag:yaml.org,2002:\n---\nv: !%79!int '1'", "yaml: did not find expected whitespace"},
+}
+
+func (s *S) TestUnmarshalErrors(c *C) {
+	for _, item := range unmarshalErrorTests {
+		var value interface{}
+		err := yaml.Unmarshal([]byte(item.data), &value)
+		c.Assert(err, ErrorMatches, item.error, Commentf("Partial unmarshal: %#v", value))
+	}
+}
+
+var unmarshalerTests = []struct {
+	data, tag string
+	value     interface{}
+}{
+	{"_: {hi: there}", "!!map", map[interface{}]interface{}{"hi": "there"}},
+	{"_: [1,A]", "!!seq", []interface{}{1, "A"}},
+	{"_: 10", "!!int", 10},
+	{"_: null", "!!null", nil},
+	{`_: BAR!`, "!!str", "BAR!"},
+	{`_: "BAR!"`, "!!str", "BAR!"},
+	{"_: !!foo 'BAR!'", "!!foo", "BAR!"},
+	{`_: ""`, "!!str", ""},
+}
+
+var unmarshalerResult = map[int]error{}
+
+type unmarshalerType struct {
+	value interface{}
+}
+
+func (o *unmarshalerType) UnmarshalYAML(unmarshal func(v interface{}) error) error {
+	if err := unmarshal(&o.value); err != nil {
+		return err
+	}
+	if i, ok := o.value.(int); ok {
+		if result, ok := unmarshalerResult[i]; ok {
+			return result
+		}
+	}
+	return nil
+}
+
+type unmarshalerPointer struct {
+	Field *unmarshalerType "_"
+}
+
+type unmarshalerValue struct {
+	Field unmarshalerType "_"
+}
+
+func (s *S) TestUnmarshalerPointerField(c *C) {
+	for _, item := range unmarshalerTests {
+		obj := &unmarshalerPointer{}
+		err := yaml.Unmarshal([]byte(item.data), obj)
+		c.Assert(err, IsNil)
+		if item.value == nil {
+			c.Assert(obj.Field, IsNil)
+		} else {
+			c.Assert(obj.Field, NotNil, Commentf("Pointer not initialized (%#v)", item.value))
+			c.Assert(obj.Field.value, DeepEquals, item.value)
+		}
+	}
+}
+
+func (s *S) TestUnmarshalerValueField(c *C) {
+	for _, item := range unmarshalerTests {
+		obj := &unmarshalerValue{}
+		err := yaml.Unmarshal([]byte(item.data), obj)
+		c.Assert(err, IsNil)
+		c.Assert(obj.Field, NotNil, Commentf("Pointer not initialized (%#v)", item.value))
+		c.Assert(obj.Field.value, DeepEquals, item.value)
+	}
+}
+
+func (s *S) TestUnmarshalerWholeDocument(c *C) {
+	obj := &unmarshalerType{}
+	err := yaml.Unmarshal([]byte(unmarshalerTests[0].data), obj)
+	c.Assert(err, IsNil)
+	value, ok := obj.value.(map[interface{}]interface{})
+	c.Assert(ok, Equals, true, Commentf("value: %#v", obj.value))
+	c.Assert(value["_"], DeepEquals, unmarshalerTests[0].value)
+}
+
+func (s *S) TestUnmarshalerTypeError(c *C) {
+	unmarshalerResult[2] = &yaml.TypeError{[]string{"foo"}}
+	unmarshalerResult[4] = &yaml.TypeError{[]string{"bar"}}
+	defer func() {
+		delete(unmarshalerResult, 2)
+		delete(unmarshalerResult, 4)
+	}()
+
+	type T struct {
+		Before int
+		After  int
+		M      map[string]*unmarshalerType
+	}
+	var v T
+	data := `{before: A, m: {abc: 1, def: 2, ghi: 3, jkl: 4}, after: B}`
+	err := yaml.Unmarshal([]byte(data), &v)
+	c.Assert(err, ErrorMatches, ""+
+		"yaml: unmarshal errors:\n"+
+		"  line 1: cannot unmarshal !!str `A` into int\n"+
+		"  foo\n"+
+		"  bar\n"+
+		"  line 1: cannot unmarshal !!str `B` into int")
+	c.Assert(v.M["abc"], NotNil)
+	c.Assert(v.M["def"], IsNil)
+	c.Assert(v.M["ghi"], NotNil)
+	c.Assert(v.M["jkl"], IsNil)
+
+	c.Assert(v.M["abc"].value, Equals, 1)
+	c.Assert(v.M["ghi"].value, Equals, 3)
+}
+
+type proxyTypeError struct{}
+
+func (v *proxyTypeError) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var s string
+	var a int32
+	var b int64
+	if err := unmarshal(&s); err != nil {
+		panic(err)
+	}
+	if s == "a" {
+		if err := unmarshal(&b); err == nil {
+			panic("should have failed")
+		}
+		return unmarshal(&a)
+	}
+	if err := unmarshal(&a); err == nil {
+		panic("should have failed")
+	}
+	return unmarshal(&b)
+}
+
+func (s *S) TestUnmarshalerTypeErrorProxying(c *C) {
+	type T struct {
+		Before int
+		After  int
+		M      map[string]*proxyTypeError
+	}
+	var v T
+	data := `{before: A, m: {abc: a, def: b}, after: B}`
+	err := yaml.Unmarshal([]byte(data), &v)
+	c.Assert(err, ErrorMatches, ""+
+		"yaml: unmarshal errors:\n"+
+		"  line 1: cannot unmarshal !!str `A` into int\n"+
+		"  line 1: cannot unmarshal !!str `a` into int32\n"+
+		"  line 1: cannot unmarshal !!str `b` into int64\n"+
+		"  line 1: cannot unmarshal !!str `B` into int")
+}
+
+type failingUnmarshaler struct{}
+
+var failingErr = errors.New("failingErr")
+
+func (ft *failingUnmarshaler) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	return failingErr
+}
+
+func (s *S) TestUnmarshalerError(c *C) {
+	err := yaml.Unmarshal([]byte("a: b"), &failingUnmarshaler{})
+	c.Assert(err, Equals, failingErr)
+}
+
+type sliceUnmarshaler []int
+
+func (su *sliceUnmarshaler) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var slice []int
+	err := unmarshal(&slice)
+	if err == nil {
+		*su = slice
+		return nil
+	}
+
+	var intVal int
+	err = unmarshal(&intVal)
+	if err == nil {
+		*su = []int{intVal}
+		return nil
+	}
+
+	return err
+}
+
+func (s *S) TestUnmarshalerRetry(c *C) {
+	var su sliceUnmarshaler
+	err := yaml.Unmarshal([]byte("[1, 2, 3]"), &su)
+	c.Assert(err, IsNil)
+	c.Assert(su, DeepEquals, sliceUnmarshaler([]int{1, 2, 3}))
+
+	err = yaml.Unmarshal([]byte("1"), &su)
+	c.Assert(err, IsNil)
+	c.Assert(su, DeepEquals, sliceUnmarshaler([]int{1}))
+}
+
+// From http://yaml.org/type/merge.html
+var mergeTests = `
+anchors:
+  list:
+    - &CENTER { "x": 1, "y": 2 }
+    - &LEFT   { "x": 0, "y": 2 }
+    - &BIG    { "r": 10 }
+    - &SMALL  { "r": 1 }
+
+# All the following maps are equal:
+
+plain:
+  # Explicit keys
+  "x": 1
+  "y": 2
+  "r": 10
+  label: center/big
+
+mergeOne:
+  # Merge one map
+  << : *CENTER
+  "r": 10
+  label: center/big
+
+mergeMultiple:
+  # Merge multiple maps
+  << : [ *CENTER, *BIG ]
+  label: center/big
+
+override:
+  # Override
+  << : [ *BIG, *LEFT, *SMALL ]
+  "x": 1
+  label: center/big
+
+shortTag:
+  # Explicit short merge tag
+  !!merge "<<" : [ *CENTER, *BIG ]
+  label: center/big
+
+longTag:
+  # Explicit merge long tag
+  !<tag:yaml.org,2002:merge> "<<" : [ *CENTER, *BIG ]
+  label: center/big
+
+inlineMap:
+  # Inlined map 
+  << : {"x": 1, "y": 2, "r": 10}
+  label: center/big
+
+inlineSequenceMap:
+  # Inlined map in sequence
+  << : [ *CENTER, {"r": 10} ]
+  label: center/big
+`
+
+func (s *S) TestMerge(c *C) {
+	var want = map[interface{}]interface{}{
+		"x":     1,
+		"y":     2,
+		"r":     10,
+		"label": "center/big",
+	}
+
+	var m map[interface{}]interface{}
+	err := yaml.Unmarshal([]byte(mergeTests), &m)
+	c.Assert(err, IsNil)
+	for name, test := range m {
+		if name == "anchors" {
+			continue
+		}
+		c.Assert(test, DeepEquals, want, Commentf("test %q failed", name))
+	}
+}
+
+func (s *S) TestMergeStruct(c *C) {
+	type Data struct {
+		X, Y, R int
+		Label   string
+	}
+	want := Data{1, 2, 10, "center/big"}
+
+	var m map[string]Data
+	err := yaml.Unmarshal([]byte(mergeTests), &m)
+	c.Assert(err, IsNil)
+	for name, test := range m {
+		if name == "anchors" {
+			continue
+		}
+		c.Assert(test, Equals, want, Commentf("test %q failed", name))
+	}
+}
+
+var unmarshalNullTests = []func() interface{}{
+	func() interface{} { var v interface{}; v = "v"; return &v },
+	func() interface{} { var s = "s"; return &s },
+	func() interface{} { var s = "s"; sptr := &s; return &sptr },
+	func() interface{} { var i = 1; return &i },
+	func() interface{} { var i = 1; iptr := &i; return &iptr },
+	func() interface{} { m := map[string]int{"s": 1}; return &m },
+	func() interface{} { m := map[string]int{"s": 1}; return m },
+}
+
+func (s *S) TestUnmarshalNull(c *C) {
+	for _, test := range unmarshalNullTests {
+		item := test()
+		zero := reflect.Zero(reflect.TypeOf(item).Elem()).Interface()
+		err := yaml.Unmarshal([]byte("null"), item)
+		c.Assert(err, IsNil)
+		if reflect.TypeOf(item).Kind() == reflect.Map {
+			c.Assert(reflect.ValueOf(item).Interface(), DeepEquals, reflect.MakeMap(reflect.TypeOf(item)).Interface())
+		} else {
+			c.Assert(reflect.ValueOf(item).Elem().Interface(), DeepEquals, zero)
+		}
+	}
+}
+
+func (s *S) TestUnmarshalSliceOnPreset(c *C) {
+	// Issue #48.
+	v := struct{ A []int }{[]int{1}}
+	yaml.Unmarshal([]byte("a: [2]"), &v)
+	c.Assert(v.A, DeepEquals, []int{2})
+}
+
+func (s *S) TestUnmarshalStrict(c *C) {
+	v := struct{ A, B int }{}
+
+	err := yaml.UnmarshalStrict([]byte("a: 1\nb: 2"), &v)
+	c.Check(err, IsNil)
+	err = yaml.Unmarshal([]byte("a: 1\nb: 2\nc: 3"), &v)
+	c.Check(err, IsNil)
+	err = yaml.UnmarshalStrict([]byte("a: 1\nb: 2\nc: 3"), &v)
+	c.Check(err, ErrorMatches, "yaml: unmarshal errors:\n  line 1: field c not found in struct struct { A int; B int }")
+}
+
+//var data []byte
+//func init() {
+//	var err error
+//	data, err = ioutil.ReadFile("/tmp/file.yaml")
+//	if err != nil {
+//		panic(err)
+//	}
+//}
+//
+//func (s *S) BenchmarkUnmarshal(c *C) {
+//	var err error
+//	for i := 0; i < c.N; i++ {
+//		var v map[string]interface{}
+//		err = yaml.Unmarshal(data, &v)
+//	}
+//	if err != nil {
+//		panic(err)
+//	}
+//}
+//
+//func (s *S) BenchmarkMarshal(c *C) {
+//	var v map[string]interface{}
+//	yaml.Unmarshal(data, &v)
+//	c.ResetTimer()
+//	for i := 0; i < c.N; i++ {
+//		yaml.Marshal(&v)
+//	}
+//}