How to use isNil method of got Package

Best Got code snippet using got.isNil

schema_test.go

Source:schema_test.go

1// Copyright 2011, 2012, 2013 Canonical Ltd.2// Licensed under the AGPLv3, see LICENCE file for details.3package schema_test4import (5	"math"6	"testing"7	. "launchpad.net/gocheck"8	"launchpad.net/juju-core/schema"9)10func Test(t *testing.T) {11	TestingT(t)12}13type S struct{}14var _ = Suite(&S{})15type Dummy struct{}16func (d *Dummy) Coerce(value interface{}, path []string) (coerced interface{}, err error) {17	return "i-am-dummy", nil18}19var aPath = []string{"<pa", "th>"}20func (s *S) TestConst(c *C) {21	sch := schema.Const("foo")22	out, err := sch.Coerce("foo", aPath)23	c.Assert(err, IsNil)24	c.Assert(out, Equals, "foo")25	out, err = sch.Coerce(42, aPath)26	c.Assert(out, IsNil)27	c.Assert(err, ErrorMatches, `<path>: expected "foo", got 42`)28	out, err = sch.Coerce(nil, aPath)29	c.Assert(out, IsNil)30	c.Assert(err, ErrorMatches, `<path>: expected "foo", got nothing`)31}32func (s *S) TestAny(c *C) {33	sch := schema.Any()34	out, err := sch.Coerce("foo", aPath)35	c.Assert(err, IsNil)36	c.Assert(out, Equals, "foo")37	out, err = sch.Coerce(nil, aPath)38	c.Assert(err, IsNil)39	c.Assert(out, Equals, nil)40}41func (s *S) TestOneOf(c *C) {42	sch := schema.OneOf(schema.Const("foo"), schema.Const(42))43	out, err := sch.Coerce("foo", aPath)44	c.Assert(err, IsNil)45	c.Assert(out, Equals, "foo")46	out, err = sch.Coerce(42, aPath)47	c.Assert(err, IsNil)48	c.Assert(out, Equals, 42)49	out, err = sch.Coerce("bar", aPath)50	c.Assert(out, IsNil)51	c.Assert(err, ErrorMatches, `<path>: unexpected value "bar"`)52}53func (s *S) TestBool(c *C) {54	sch := schema.Bool()55	out, err := sch.Coerce(true, aPath)56	c.Assert(err, IsNil)57	c.Assert(out, Equals, true)58	out, err = sch.Coerce(false, aPath)59	c.Assert(err, IsNil)60	c.Assert(out, Equals, false)61	out, err = sch.Coerce(1, aPath)62	c.Assert(out, IsNil)63	c.Assert(err, ErrorMatches, "<path>: expected bool, got 1")64	out, err = sch.Coerce(nil, aPath)65	c.Assert(out, IsNil)66	c.Assert(err, ErrorMatches, "<path>: expected bool, got nothing")67}68func (s *S) TestInt(c *C) {69	sch := schema.Int()70	out, err := sch.Coerce(42, aPath)71	c.Assert(err, IsNil)72	c.Assert(out, Equals, int64(42))73	out, err = sch.Coerce(int8(42), aPath)74	c.Assert(err, IsNil)75	c.Assert(out, Equals, int64(42))76	out, err = sch.Coerce(true, aPath)77	c.Assert(out, IsNil)78	c.Assert(err, ErrorMatches, "<path>: expected int, got true")79	out, err = sch.Coerce(nil, aPath)80	c.Assert(out, IsNil)81	c.Assert(err, ErrorMatches, "<path>: expected int, got nothing")82}83func (s *S) TestForceInt(c *C) {84	sch := schema.ForceInt()85	out, err := sch.Coerce(42, aPath)86	c.Assert(err, IsNil)87	c.Assert(out, Equals, int(42))88	out, err = sch.Coerce(int8(42), aPath)89	c.Assert(err, IsNil)90	c.Assert(out, Equals, int(42))91	out, err = sch.Coerce(float32(42), aPath)92	c.Assert(err, IsNil)93	c.Assert(out, Equals, int(42))94	out, err = sch.Coerce(float64(42), aPath)95	c.Assert(err, IsNil)96	c.Assert(out, Equals, int(42))97	out, err = sch.Coerce(42.66, aPath)98	c.Assert(err, IsNil)99	c.Assert(out, Equals, int(42))100	// If an out of range value is provided, that value is truncated,101	// generating unexpected results, but no error is raised.102	out, err = sch.Coerce(float64(math.MaxInt64+1), aPath)103	c.Assert(err, IsNil)104	out, err = sch.Coerce(true, aPath)105	c.Assert(out, IsNil)106	c.Assert(err, ErrorMatches, "<path>: expected number, got true")107	out, err = sch.Coerce(nil, aPath)108	c.Assert(out, IsNil)109	c.Assert(err, ErrorMatches, "<path>: expected number, got nothing")110}111func (s *S) TestFloat(c *C) {112	sch := schema.Float()113	out, err := sch.Coerce(float32(1.0), aPath)114	c.Assert(err, IsNil)115	c.Assert(out, Equals, float64(1.0))116	out, err = sch.Coerce(float64(1.0), aPath)117	c.Assert(err, IsNil)118	c.Assert(out, Equals, float64(1.0))119	out, err = sch.Coerce(true, aPath)120	c.Assert(out, IsNil)121	c.Assert(err, ErrorMatches, "<path>: expected float, got true")122	out, err = sch.Coerce(nil, aPath)123	c.Assert(out, IsNil)124	c.Assert(err, ErrorMatches, "<path>: expected float, got nothing")125}126func (s *S) TestString(c *C) {127	sch := schema.String()128	out, err := sch.Coerce("foo", aPath)129	c.Assert(err, IsNil)130	c.Assert(out, Equals, "foo")131	out, err = sch.Coerce(true, aPath)132	c.Assert(out, IsNil)133	c.Assert(err, ErrorMatches, "<path>: expected string, got true")134	out, err = sch.Coerce(nil, aPath)135	c.Assert(out, IsNil)136	c.Assert(err, ErrorMatches, "<path>: expected string, got nothing")137}138func (s *S) TestSimpleRegexp(c *C) {139	sch := schema.SimpleRegexp()140	out, err := sch.Coerce("[0-9]+", aPath)141	c.Assert(err, IsNil)142	c.Assert(out, Equals, "[0-9]+")143	out, err = sch.Coerce(1, aPath)144	c.Assert(out, IsNil)145	c.Assert(err, ErrorMatches, "<path>: expected regexp string, got 1")146	out, err = sch.Coerce("[", aPath)147	c.Assert(out, IsNil)148	c.Assert(err, ErrorMatches, `<path>: expected valid regexp, got "\["`)149	out, err = sch.Coerce(nil, aPath)150	c.Assert(out, IsNil)151	c.Assert(err, ErrorMatches, `<path>: expected regexp string, got nothing`)152}153func (s *S) TestList(c *C) {154	sch := schema.List(schema.Int())155	out, err := sch.Coerce([]int8{1, 2}, aPath)156	c.Assert(err, IsNil)157	c.Assert(out, DeepEquals, []interface{}{int64(1), int64(2)})158	out, err = sch.Coerce(42, aPath)159	c.Assert(out, IsNil)160	c.Assert(err, ErrorMatches, "<path>: expected list, got 42")161	out, err = sch.Coerce(nil, aPath)162	c.Assert(out, IsNil)163	c.Assert(err, ErrorMatches, "<path>: expected list, got nothing")164	out, err = sch.Coerce([]interface{}{1, true}, aPath)165	c.Assert(out, IsNil)166	c.Assert(err, ErrorMatches, `<path>\[1\]: expected int, got true`)167}168func (s *S) TestMap(c *C) {169	sch := schema.Map(schema.String(), schema.Int())170	out, err := sch.Coerce(map[string]interface{}{"a": 1, "b": int8(2)}, aPath)171	c.Assert(err, IsNil)172	c.Assert(out, DeepEquals, map[interface{}]interface{}{"a": int64(1), "b": int64(2)})173	out, err = sch.Coerce(42, aPath)174	c.Assert(out, IsNil)175	c.Assert(err, ErrorMatches, "<path>: expected map, got 42")176	out, err = sch.Coerce(nil, aPath)177	c.Assert(out, IsNil)178	c.Assert(err, ErrorMatches, "<path>: expected map, got nothing")179	out, err = sch.Coerce(map[int]int{1: 1}, aPath)180	c.Assert(out, IsNil)181	c.Assert(err, ErrorMatches, "<path>: expected string, got 1")182	out, err = sch.Coerce(map[string]bool{"a": true}, aPath)183	c.Assert(out, IsNil)184	c.Assert(err, ErrorMatches, `<path>\.a: expected int, got true`)185	// First path entry shouldn't have dots in an error message.186	out, err = sch.Coerce(map[string]bool{"a": true}, nil)187	c.Assert(out, IsNil)188	c.Assert(err, ErrorMatches, `a: expected int, got true`)189}190func (s *S) TestStringMap(c *C) {191	sch := schema.StringMap(schema.Int())192	out, err := sch.Coerce(map[string]interface{}{"a": 1, "b": int8(2)}, aPath)193	c.Assert(err, IsNil)194	c.Assert(out, DeepEquals, map[string]interface{}{"a": int64(1), "b": int64(2)})195	out, err = sch.Coerce(42, aPath)196	c.Assert(out, IsNil)197	c.Assert(err, ErrorMatches, "<path>: expected map, got 42")198	out, err = sch.Coerce(nil, aPath)199	c.Assert(out, IsNil)200	c.Assert(err, ErrorMatches, "<path>: expected map, got nothing")201	out, err = sch.Coerce(map[int]int{1: 1}, aPath)202	c.Assert(out, IsNil)203	c.Assert(err, ErrorMatches, "<path>: expected string, got 1")204	out, err = sch.Coerce(map[string]bool{"a": true}, aPath)205	c.Assert(out, IsNil)206	c.Assert(err, ErrorMatches, `<path>\.a: expected int, got true`)207	// First path entry shouldn't have dots in an error message.208	out, err = sch.Coerce(map[string]bool{"a": true}, nil)209	c.Assert(out, IsNil)210	c.Assert(err, ErrorMatches, `a: expected int, got true`)211}212func assertFieldMap(c *C, sch schema.Checker) {213	out, err := sch.Coerce(map[string]interface{}{"a": "A", "b": "B"}, aPath)214	c.Assert(err, IsNil)215	c.Assert(out, DeepEquals, map[string]interface{}{"a": "A", "b": "B", "c": "C"})216	out, err = sch.Coerce(42, aPath)217	c.Assert(out, IsNil)218	c.Assert(err, ErrorMatches, "<path>: expected map, got 42")219	out, err = sch.Coerce(nil, aPath)220	c.Assert(out, IsNil)221	c.Assert(err, ErrorMatches, "<path>: expected map, got nothing")222	out, err = sch.Coerce(map[string]interface{}{"a": "A", "b": "C"}, aPath)223	c.Assert(out, IsNil)224	c.Assert(err, ErrorMatches, `<path>\.b: expected "B", got "C"`)225	out, err = sch.Coerce(map[string]interface{}{"b": "B"}, aPath)226	c.Assert(out, IsNil)227	c.Assert(err, ErrorMatches, `<path>\.a: expected "A", got nothing`)228	// b is optional229	out, err = sch.Coerce(map[string]interface{}{"a": "A"}, aPath)230	c.Assert(err, IsNil)231	c.Assert(out, DeepEquals, map[string]interface{}{"a": "A", "c": "C"})232	// First path entry shouldn't have dots in an error message.233	out, err = sch.Coerce(map[string]bool{"a": true}, nil)234	c.Assert(out, IsNil)235	c.Assert(err, ErrorMatches, `a: expected "A", got true`)236}237func (s *S) TestFieldMap(c *C) {238	fields := schema.Fields{239		"a": schema.Const("A"),240		"b": schema.Const("B"),241		"c": schema.Const("C"),242	}243	defaults := schema.Defaults{244		"b": schema.Omit,245		"c": "C",246	}247	sch := schema.FieldMap(fields, defaults)248	assertFieldMap(c, sch)249	out, err := sch.Coerce(map[string]interface{}{"a": "A", "b": "B", "d": "D"}, aPath)250	c.Assert(err, IsNil)251	c.Assert(out, DeepEquals, map[string]interface{}{"a": "A", "b": "B", "c": "C"})252	out, err = sch.Coerce(map[string]interface{}{"a": "A", "d": "D"}, aPath)253	c.Assert(err, IsNil)254	c.Assert(out, DeepEquals, map[string]interface{}{"a": "A", "c": "C"})255}256func (s *S) TestFieldMapDefaultInvalid(c *C) {257	fields := schema.Fields{258		"a": schema.Const("A"),259	}260	defaults := schema.Defaults{261		"a": "B",262	}263	sch := schema.FieldMap(fields, defaults)264	_, err := sch.Coerce(map[string]interface{}{}, aPath)265	c.Assert(err, ErrorMatches, `<path>.a: expected "A", got "B"`)266}267func (s *S) TestStrictFieldMap(c *C) {268	fields := schema.Fields{269		"a": schema.Const("A"),270		"b": schema.Const("B"),271		"c": schema.Const("C"),272	}273	defaults := schema.Defaults{274		"b": schema.Omit,275		"c": "C",276	}277	sch := schema.StrictFieldMap(fields, defaults)278	assertFieldMap(c, sch)279	out, err := sch.Coerce(map[string]interface{}{"a": "A", "b": "B", "d": "D"}, aPath)280	c.Assert(out, IsNil)281	c.Assert(err, ErrorMatches, `<path>.d: expected nothing, got "D"`)282}283func (s *S) TestSchemaMap(c *C) {284	fields1 := schema.FieldMap(schema.Fields{285		"type": schema.Const(1),286		"a":    schema.Const(2),287	}, nil)288	fields2 := schema.FieldMap(schema.Fields{289		"type": schema.Const(3),290		"b":    schema.Const(4),291	}, nil)292	sch := schema.FieldMapSet("type", []schema.Checker{fields1, fields2})293	out, err := sch.Coerce(map[string]int{"type": 1, "a": 2}, aPath)294	c.Assert(err, IsNil)295	c.Assert(out, DeepEquals, map[string]interface{}{"type": 1, "a": 2})296	out, err = sch.Coerce(map[string]int{"type": 3, "b": 4}, aPath)297	c.Assert(err, IsNil)298	c.Assert(out, DeepEquals, map[string]interface{}{"type": 3, "b": 4})299	out, err = sch.Coerce(map[string]int{}, aPath)300	c.Assert(out, IsNil)301	c.Assert(err, ErrorMatches, `<path>\.type: expected supported selector, got nothing`)302	out, err = sch.Coerce(map[string]int{"type": 2}, aPath)303	c.Assert(out, IsNil)304	c.Assert(err, ErrorMatches, `<path>\.type: expected supported selector, got 2`)305	out, err = sch.Coerce(map[string]int{"type": 3, "b": 5}, aPath)306	c.Assert(out, IsNil)307	c.Assert(err, ErrorMatches, `<path>\.b: expected 4, got 5`)308	out, err = sch.Coerce(42, aPath)309	c.Assert(out, IsNil)310	c.Assert(err, ErrorMatches, `<path>: expected map, got 42`)311	out, err = sch.Coerce(nil, aPath)312	c.Assert(out, IsNil)313	c.Assert(err, ErrorMatches, `<path>: expected map, got nothing`)314	// First path entry shouldn't have dots in an error message.315	out, err = sch.Coerce(map[string]int{"a": 1}, nil)316	c.Assert(out, IsNil)317	c.Assert(err, ErrorMatches, `type: expected supported selector, got nothing`)318}...

isNil

Using AI Code Generation

1import (2func main() {3	if a == nil {4		fmt.Println("a is nil")5	} else {6		fmt.Println("a is not nil")7	}8	fmt.Println(reflect.ValueOf(a).IsNil())9}

isNil

Using AI Code Generation

1import (2func main() {3	if reflect.ValueOf(a).IsNil() {4		fmt.Println("a is nil")5	} else {6		fmt.Println("a is not nil")7	}8}

isNil

Using AI Code Generation

1import (2func main() {3	fmt.Println(reflect.ValueOf(a).IsNil())4	fmt.Println(reflect.ValueOf(b).IsNil())5	fmt.Println(reflect.ValueOf(c).IsNil())6	fmt.Println(reflect.ValueOf(d).IsNil())7}

isNil

Using AI Code Generation

1import (2func main() {3 if a == nil {4 fmt.Println("a is nil")5 } else {6 fmt.Println("a is not nil")7 }8}

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