1/*
2Copyright 2019 The Kubernetes Authors.
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8    http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package defaulting
18
19import (
20	"bytes"
21	"reflect"
22	"testing"
23
24	structuralschema "k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
25	"k8s.io/apimachinery/pkg/util/json"
26)
27
28func TestDefault(t *testing.T) {
29	tests := []struct {
30		name     string
31		json     string
32		schema   *structuralschema.Structural
33		expected string
34	}{
35		{"empty", "null", nil, "null"},
36		{"scalar", "4", &structuralschema.Structural{
37			Generic: structuralschema.Generic{
38				Default: structuralschema.JSON{"foo"},
39			},
40		}, "4"},
41		{"scalar array", "[1,2]", &structuralschema.Structural{
42			Items: &structuralschema.Structural{
43				Generic: structuralschema.Generic{
44					Default: structuralschema.JSON{"foo"},
45				},
46			},
47		}, "[1,2]"},
48		{"object array", `[{"a":1},{"b":1},{"c":1}]`, &structuralschema.Structural{
49			Items: &structuralschema.Structural{
50				Properties: map[string]structuralschema.Structural{
51					"a": {
52						Generic: structuralschema.Generic{
53							Default: structuralschema.JSON{"A"},
54						},
55					},
56					"b": {
57						Generic: structuralschema.Generic{
58							Default: structuralschema.JSON{"B"},
59						},
60					},
61					"c": {
62						Generic: structuralschema.Generic{
63							Default: structuralschema.JSON{"C"},
64						},
65					},
66				},
67			},
68		}, `[{"a":1,"b":"B","c":"C"},{"a":"A","b":1,"c":"C"},{"a":"A","b":"B","c":1}]`},
69		{"object array object", `{"array":[{"a":1},{"b":2}],"object":{"a":1},"additionalProperties":{"x":{"a":1},"y":{"b":2}}}`, &structuralschema.Structural{
70			Properties: map[string]structuralschema.Structural{
71				"array": {
72					Items: &structuralschema.Structural{
73						Properties: map[string]structuralschema.Structural{
74							"a": {
75								Generic: structuralschema.Generic{
76									Default: structuralschema.JSON{"A"},
77								},
78							},
79							"b": {
80								Generic: structuralschema.Generic{
81									Default: structuralschema.JSON{"B"},
82								},
83							},
84						},
85					},
86				},
87				"object": {
88					Properties: map[string]structuralschema.Structural{
89						"a": {
90							Generic: structuralschema.Generic{
91								Default: structuralschema.JSON{"N"},
92							},
93						},
94						"b": {
95							Generic: structuralschema.Generic{
96								Default: structuralschema.JSON{"O"},
97							},
98						},
99					},
100				},
101				"additionalProperties": {
102					Generic: structuralschema.Generic{
103						AdditionalProperties: &structuralschema.StructuralOrBool{
104							Structural: &structuralschema.Structural{
105								Properties: map[string]structuralschema.Structural{
106									"a": {
107										Generic: structuralschema.Generic{
108											Default: structuralschema.JSON{"alpha"},
109										},
110									},
111									"b": {
112										Generic: structuralschema.Generic{
113											Default: structuralschema.JSON{"beta"},
114										},
115									},
116								},
117							},
118						},
119					},
120				},
121				"foo": {
122					Generic: structuralschema.Generic{
123						Default: structuralschema.JSON{"bar"},
124					},
125				},
126			},
127		}, `{"array":[{"a":1,"b":"B"},{"a":"A","b":2}],"object":{"a":1,"b":"O"},"additionalProperties":{"x":{"a":1,"b":"beta"},"y":{"a":"alpha","b":2}},"foo":"bar"}`},
128		{"empty and null", `[{},{"a":1},{"a":0},{"a":0.0},{"a":""},{"a":null},{"a":[]},{"a":{}}]`, &structuralschema.Structural{
129			Items: &structuralschema.Structural{
130				Properties: map[string]structuralschema.Structural{
131					"a": {
132						Generic: structuralschema.Generic{
133							Default: structuralschema.JSON{"A"},
134						},
135					},
136				},
137			},
138		}, `[{"a":"A"},{"a":1},{"a":0},{"a":0.0},{"a":""},{"a":"A"},{"a":[]},{"a":{}}]`},
139		{"null in nullable list", `[null]`, &structuralschema.Structural{
140			Generic: structuralschema.Generic{
141				Nullable: true,
142			},
143			Items: &structuralschema.Structural{
144				Properties: map[string]structuralschema.Structural{
145					"a": {
146						Generic: structuralschema.Generic{
147							Default: structuralschema.JSON{"A"},
148						},
149					},
150				},
151			},
152		}, `[null]`},
153		{"null in non-nullable list", `[null]`, &structuralschema.Structural{
154			Generic: structuralschema.Generic{
155				Nullable: false,
156			},
157			Items: &structuralschema.Structural{
158				Generic: structuralschema.Generic{
159					Default: structuralschema.JSON{"A"},
160				},
161			},
162		}, `["A"]`},
163		{"null in nullable object", `{"a": null}`, &structuralschema.Structural{
164			Generic: structuralschema.Generic{},
165			Properties: map[string]structuralschema.Structural{
166				"a": {
167					Generic: structuralschema.Generic{
168						Nullable: true,
169						Default:  structuralschema.JSON{"A"},
170					},
171				},
172			},
173		}, `{"a": null}`},
174		{"null in non-nullable object", `{"a": null}`, &structuralschema.Structural{
175			Properties: map[string]structuralschema.Structural{
176				"a": {
177					Generic: structuralschema.Generic{
178						Nullable: false,
179						Default:  structuralschema.JSON{"A"},
180					},
181				},
182			},
183		}, `{"a": "A"}`},
184		{"null in nullable object with additionalProperties", `{"a": null}`, &structuralschema.Structural{
185			Generic: structuralschema.Generic{
186				AdditionalProperties: &structuralschema.StructuralOrBool{
187					Structural: &structuralschema.Structural{
188						Generic: structuralschema.Generic{
189							Nullable: true,
190							Default:  structuralschema.JSON{"A"},
191						},
192					},
193				},
194			},
195		}, `{"a": null}`},
196		{"null in non-nullable object with additionalProperties", `{"a": null}`, &structuralschema.Structural{
197			Generic: structuralschema.Generic{
198				AdditionalProperties: &structuralschema.StructuralOrBool{
199					Structural: &structuralschema.Structural{
200						Generic: structuralschema.Generic{
201							Nullable: false,
202							Default:  structuralschema.JSON{"A"},
203						},
204					},
205				},
206			},
207		}, `{"a": "A"}`},
208		{"null unknown field", `{"a": null}`, &structuralschema.Structural{
209			Generic: structuralschema.Generic{
210				AdditionalProperties: &structuralschema.StructuralOrBool{
211					Bool: true,
212				},
213			},
214		}, `{"a": null}`},
215	}
216	for _, tt := range tests {
217		t.Run(tt.name, func(t *testing.T) {
218			var in interface{}
219			if err := json.Unmarshal([]byte(tt.json), &in); err != nil {
220				t.Fatal(err)
221			}
222
223			var expected interface{}
224			if err := json.Unmarshal([]byte(tt.expected), &expected); err != nil {
225				t.Fatal(err)
226			}
227
228			Default(in, tt.schema)
229			if !reflect.DeepEqual(in, expected) {
230				var buf bytes.Buffer
231				enc := json.NewEncoder(&buf)
232				enc.SetIndent("", "  ")
233				err := enc.Encode(in)
234				if err != nil {
235					t.Fatalf("unexpected result mashalling error: %v", err)
236				}
237				t.Errorf("expected: %s\ngot: %s", tt.expected, buf.String())
238			}
239		})
240	}
241}
242