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Side by Side Diff: src/pkg/exp/datafmt/datafmt_test.go

Issue 5297042: code review 5297042: [release-branch.r58] reflect: disallow Interface method... (Closed)
Patch Set: diff -r d292bc788668 https://go.googlecode.com/hg/ Created 12 years, 5 months ago
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1 // Copyright 2009 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 package datafmt
6
7 import (
8 "fmt"
9 "testing"
10 "go/token"
11 )
12
13
14 var fset = token.NewFileSet()
15
16
17 func parse(t *testing.T, form string, fmap FormatterMap) Format {
18 f, err := Parse(fset, "", []byte(form), fmap)
19 if err != nil {
20 t.Errorf("Parse(%s): %v", form, err)
21 return nil
22 }
23 return f
24 }
25
26
27 func verify(t *testing.T, f Format, expected string, args ...interface{}) {
28 if f == nil {
29 return // allow other tests to run
30 }
31 result := f.Sprint(args...)
32 if result != expected {
33 t.Errorf(
34 "result : `%s`\nexpected: `%s`\n\n",
35 result, expected)
36 }
37 }
38
39
40 func formatter(s *State, value interface{}, rule_name string) bool {
41 switch rule_name {
42 case "/":
43 fmt.Fprintf(s, "%d %d %d", s.Pos().Line, s.LinePos().Column, s.P os().Column)
44 return true
45 case "blank":
46 s.Write([]byte{' '})
47 return true
48 case "int":
49 if value.(int)&1 == 0 {
50 fmt.Fprint(s, "even ")
51 } else {
52 fmt.Fprint(s, "odd ")
53 }
54 return true
55 case "nil":
56 return false
57 case "testing.T":
58 s.Write([]byte("testing.T"))
59 return true
60 }
61 panic("unreachable")
62 return false
63 }
64
65
66 func TestCustomFormatters(t *testing.T) {
67 fmap0 := FormatterMap{"/": formatter}
68 fmap1 := FormatterMap{"int": formatter, "blank": formatter, "nil": forma tter}
69 fmap2 := FormatterMap{"testing.T": formatter}
70
71 f := parse(t, `int=`, fmap0)
72 verify(t, f, ``, 1, 2, 3)
73
74 f = parse(t, `int="#"`, nil)
75 verify(t, f, `###`, 1, 2, 3)
76
77 f = parse(t, `int="#";string="%s"`, fmap0)
78 verify(t, f, "#1 0 1#1 0 7#1 0 13\n2 0 0foo2 0 8\n", 1, 2, 3, "\n", "foo ", "\n")
79
80 f = parse(t, ``, fmap1)
81 verify(t, f, `even odd even odd `, 0, 1, 2, 3)
82
83 f = parse(t, `/ =@:blank; float64="#"`, fmap1)
84 verify(t, f, `# # #`, 0.0, 1.0, 2.0)
85
86 f = parse(t, `float64=@:nil`, fmap1)
87 verify(t, f, ``, 0.0, 1.0, 2.0)
88
89 f = parse(t, `testing "testing"; ptr=*`, fmap2)
90 verify(t, f, `testing.T`, t)
91
92 // TODO needs more tests
93 }
94
95
96 // ----------------------------------------------------------------------------
97 // Formatting of basic and simple composite types
98
99 func check(t *testing.T, form, expected string, args ...interface{}) {
100 f := parse(t, form, nil)
101 if f == nil {
102 return // allow other tests to run
103 }
104 result := f.Sprint(args...)
105 if result != expected {
106 t.Errorf(
107 "format : %s\nresult : `%s`\nexpected: `%s`\n\n",
108 form, result, expected)
109 }
110 }
111
112
113 func TestBasicTypes(t *testing.T) {
114 check(t, ``, ``)
115 check(t, `bool=":%v"`, `:true:false`, true, false)
116 check(t, `int="%b %d %o 0x%x"`, `101010 42 52 0x2a`, 42)
117
118 check(t, `int="%"`, `%`, 42)
119 check(t, `int="%%"`, `%`, 42)
120 check(t, `int="**%%**"`, `**%**`, 42)
121 check(t, `int="%%%%%%"`, `%%%`, 42)
122 check(t, `int="%%%d%%"`, `%42%`, 42)
123
124 const i = -42
125 const is = `-42`
126 check(t, `int ="%d"`, is, i)
127 check(t, `int8 ="%d"`, is, int8(i))
128 check(t, `int16="%d"`, is, int16(i))
129 check(t, `int32="%d"`, is, int32(i))
130 check(t, `int64="%d"`, is, int64(i))
131
132 const u = 42
133 const us = `42`
134 check(t, `uint ="%d"`, us, uint(u))
135 check(t, `uint8 ="%d"`, us, uint8(u))
136 check(t, `uint16="%d"`, us, uint16(u))
137 check(t, `uint32="%d"`, us, uint32(u))
138 check(t, `uint64="%d"`, us, uint64(u))
139
140 const f = 3.141592
141 const fs = `3.141592`
142 check(t, `float64="%g"`, fs, f)
143 check(t, `float32="%g"`, fs, float32(f))
144 check(t, `float64="%g"`, fs, float64(f))
145 }
146
147
148 func TestArrayTypes(t *testing.T) {
149 var a0 [10]int
150 check(t, `array="array";`, `array`, a0)
151
152 a1 := [...]int{1, 2, 3}
153 check(t, `array="array";`, `array`, a1)
154 check(t, `array={*}; int="%d";`, `123`, a1)
155 check(t, `array={* / ", "}; int="%d";`, `1, 2, 3`, a1)
156 check(t, `array={* / *}; int="%d";`, `12233`, a1)
157
158 a2 := []interface{}{42, "foo", 3.14}
159 check(t, `array={* / ", "}; interface=*; string="bar"; default="%v";`, ` 42, bar, 3.14`, a2)
160 }
161
162
163 func TestChanTypes(t *testing.T) {
164 var c0 chan int
165 check(t, `chan="chan"`, `chan`, c0)
166
167 c1 := make(chan int)
168 go func() { c1 <- 42 }()
169 check(t, `chan="chan"`, `chan`, c1)
170 // check(t, `chan=*`, `42`, c1); // reflection support for chans incomp lete
171 }
172
173
174 func TestFuncTypes(t *testing.T) {
175 var f0 func() int
176 check(t, `func="func"`, `func`, f0)
177
178 f1 := func() int { return 42 }
179 check(t, `func="func"`, `func`, f1)
180 // check(t, `func=*`, `42`, f1); // reflection support for funcs incomp lete
181 }
182
183
184 func TestMapTypes(t *testing.T) {
185 var m0 map[string]int
186 check(t, `map="map"`, `map`, m0)
187
188 m1 := map[string]int{}
189 check(t, `map="map"`, `map`, m1)
190 // check(t, `map=*`, ``, m1); // reflection support for maps incomplete
191 }
192
193
194 func TestPointerTypes(t *testing.T) {
195 var p0 *int
196 check(t, `ptr="ptr"`, `ptr`, p0)
197 check(t, `ptr=*`, ``, p0)
198 check(t, `ptr=*|"nil"`, `nil`, p0)
199
200 x := 99991
201 p1 := &x
202 check(t, `ptr="ptr"`, `ptr`, p1)
203 check(t, `ptr=*; int="%d"`, `99991`, p1)
204 }
205
206
207 func TestDefaultRule(t *testing.T) {
208 check(t, `default="%v"`, `42foo3.14`, 42, "foo", 3.14)
209 check(t, `default="%v"; int="%x"`, `abcdef`, 10, 11, 12, 13, 14, 15)
210 check(t, `default="%v"; int="%x"`, `ab**ef`, 10, 11, "**", 14, 15)
211 check(t, `default="%x"; int=@:default`, `abcdef`, 10, 11, 12, 13, 14, 15 )
212 }
213
214
215 func TestGlobalSeparatorRule(t *testing.T) {
216 check(t, `int="%d"; / ="-"`, `1-2-3-4`, 1, 2, 3, 4)
217 check(t, `int="%x%x"; / ="*"`, `aa*aa`, 10, 10)
218 }
219
220
221 // ----------------------------------------------------------------------------
222 // Formatting of a struct
223
224 type T1 struct {
225 a int
226 }
227
228 const F1 = `datafmt "datafmt";` +
229 `int = "%d";` +
230 `datafmt.T1 = "<" a ">";`
231
232 func TestStruct1(t *testing.T) { check(t, F1, "<42>", T1{42}) }
233
234
235 // ----------------------------------------------------------------------------
236 // Formatting of a struct with an optional field (ptr)
237
238 type T2 struct {
239 s string
240 p *T1
241 }
242
243 const F2a = F1 +
244 `string = "%s";` +
245 `ptr = *;` +
246 `datafmt.T2 = s ["-" p "-"];`
247
248 const F2b = F1 +
249 `string = "%s";` +
250 `ptr = *;` +
251 `datafmt.T2 = s ("-" p "-" | "empty");`
252
253 func TestStruct2(t *testing.T) {
254 check(t, F2a, "foo", T2{"foo", nil})
255 check(t, F2a, "bar-<17>-", T2{"bar", &T1{17}})
256 check(t, F2b, "fooempty", T2{"foo", nil})
257 }
258
259
260 // ----------------------------------------------------------------------------
261 // Formatting of a struct with a repetitive field (slice)
262
263 type T3 struct {
264 s string
265 a []int
266 }
267
268 const F3a = `datafmt "datafmt";` +
269 `default = "%v";` +
270 `array = *;` +
271 `datafmt.T3 = s {" " a a / ","};`
272
273 const F3b = `datafmt "datafmt";` +
274 `int = "%d";` +
275 `string = "%s";` +
276 `array = *;` +
277 `nil = ;` +
278 `empty = *:nil;` +
279 `datafmt.T3 = s [a:empty ": " {a / "-"}]`
280
281 func TestStruct3(t *testing.T) {
282 check(t, F3a, "foo", T3{"foo", nil})
283 check(t, F3a, "foo 00, 11, 22", T3{"foo", []int{0, 1, 2}})
284 check(t, F3b, "bar", T3{"bar", nil})
285 check(t, F3b, "bal: 2-3-5", T3{"bal", []int{2, 3, 5}})
286 }
287
288
289 // ----------------------------------------------------------------------------
290 // Formatting of a struct with alternative field
291
292 type T4 struct {
293 x *int
294 a []int
295 }
296
297 const F4a = `datafmt "datafmt";` +
298 `int = "%d";` +
299 `ptr = *;` +
300 `array = *;` +
301 `nil = ;` +
302 `empty = *:nil;` +
303 `datafmt.T4 = "<" (x:empty x | "-") ">" `
304
305 const F4b = `datafmt "datafmt";` +
306 `int = "%d";` +
307 `ptr = *;` +
308 `array = *;` +
309 `nil = ;` +
310 `empty = *:nil;` +
311 `datafmt.T4 = "<" (a:empty {a / ", "} | "-") ">" `
312
313 func TestStruct4(t *testing.T) {
314 x := 7
315 check(t, F4a, "<->", T4{nil, nil})
316 check(t, F4a, "<7>", T4{&x, nil})
317 check(t, F4b, "<->", T4{nil, nil})
318 check(t, F4b, "<2, 3, 7>", T4{nil, []int{2, 3, 7}})
319 }
320
321
322 // ----------------------------------------------------------------------------
323 // Formatting a struct (documentation example)
324
325 type Point struct {
326 name string
327 x, y int
328 }
329
330 const FPoint = `datafmt "datafmt";` +
331 `int = "%d";` +
332 `hexInt = "0x%x";` +
333 `string = "---%s---";` +
334 `datafmt.Point = name "{" x ", " y:hexInt "}";`
335
336 func TestStructPoint(t *testing.T) {
337 p := Point{"foo", 3, 15}
338 check(t, FPoint, "---foo---{3, 0xf}", p)
339 }
340
341
342 // ----------------------------------------------------------------------------
343 // Formatting a slice (documentation example)
344
345 const FSlice = `int = "%b";` +
346 `array = { * / ", " }`
347
348 func TestSlice(t *testing.T) { check(t, FSlice, "10, 11, 101, 111", []int{2, 3, 5, 7}) }
349
350
351 // TODO add more tests
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