1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
import XCTest
@testable import WIT
class NameLookupTests: XCTestCase {
func buildPackages(_ packages: [[String]]) throws -> PackageResolver {
let packageResolver = PackageResolver()
for pkgFiles in packages {
let unit = try buildPackageUnit(pkgFiles)
packageResolver.register(packageUnit: unit)
}
return packageResolver
}
func buildPackageUnit(_ pkgFiles: [String]) throws -> PackageUnit {
var packageBuilder = PackageBuilder()
for text in pkgFiles {
var lexer = Lexer(cursor: .init(input: text))
let ast = try SourceFileSyntax.parse(lexer: &lexer, fileName: "test.wit")
try packageBuilder.append(ast)
}
return try packageBuilder.build()
}
func buildPackageUnit(_ text: String) throws -> (PackageUnit, PackageResolver) {
let packageResolver = PackageResolver()
let unit = try buildPackageUnit([text])
packageResolver.register(packageUnit: unit)
return (unit, packageResolver)
}
func lookupType(_ source: String, interfaceName: String, typeName: String) throws -> WITType {
let (packageUnit, packageResolver) = try buildPackageUnit(source)
let context = SemanticsContext(rootPackage: packageUnit, packageResolver: packageResolver)
let (interface, sourceFile) = try context.lookupInterface(name: interfaceName, contextPackage: packageUnit)
let lookup = TypeNameLookup(
context: .init(
kind: .interface(interface, sourceFile: sourceFile, context: .package(packageUnit.packageName)),
packageUnit: packageUnit,
packageResolver: packageResolver
),
name: typeName, evaluator: context.evaluator
)
return try lookup.lookup()
}
func lookupType(_ source: [[String]], namespace: String, package: String, interfaceName: String, typeName: String) throws -> WITType {
let packageResolver = try buildPackages(source)
let packageUnit = try XCTUnwrap(packageResolver.findPackage(namespace: namespace, package: package, version: nil))
let context = SemanticsContext(rootPackage: packageUnit, packageResolver: packageResolver)
let (interface, sourceFile) = try context.lookupInterface(name: interfaceName, contextPackage: packageUnit)
let lookup = TypeNameLookup(
context: .init(
kind: .interface(interface, sourceFile: sourceFile, context: .package(packageUnit.packageName)),
packageUnit: packageUnit,
packageResolver: packageResolver
),
name: typeName, evaluator: context.evaluator
)
return try lookup.lookup()
}
func assertLookup(_ source: String, interfaceName: String, typeName: String, expected: WITType, line: UInt = #line) throws {
let type = try lookupType(source, interfaceName: interfaceName, typeName: typeName)
XCTAssertEqual(type, expected, line: line)
}
func testLookupAliasPrimitiveType() throws {
try assertLookup(
"""
package foo:bar
interface x {
type my-type = u8
}
""",
interfaceName: "x",
typeName: "my-type",
expected: .u8
)
}
func testLookupAliasDefinedType() throws {
let type = try lookupType(
"""
package foo:bar
interface x {
record r1 {}
type my-type = r1
}
""",
interfaceName: "x",
typeName: "my-type"
)
guard case let .record(record) = type else {
XCTFail("expected record but got \(type)")
return
}
XCTAssertEqual(record.fields, [])
}
func testLookupThroughUse() throws {
let type = try lookupType(
"""
package foo:bar
interface x {
use y.{r1}
type my-type = r1
}
interface y {
record r1 {}
}
""",
interfaceName: "x",
typeName: "my-type"
)
guard case let .record(record) = type else {
XCTFail("expected record but got \(type)")
return
}
XCTAssertEqual(record.fields, [])
}
func testLookupExternalType() throws {
let type = try lookupType(
[
[
"""
package foo:root
interface x {
use foo:pkg1/y.{r1}
type my-type = r1
}
"""
],
[
"""
package foo:pkg1
interface y {
record r1 {}
}
"""
],
],
namespace: "foo", package: "root", interfaceName: "x", typeName: "my-type"
)
guard case let .record(record) = type else {
XCTFail("expected record but got \(type)")
return
}
XCTAssertEqual(record.fields, [])
}
func testLookupTopLevelUsedInterface() throws {
let type = try lookupType(
[
[
"""
package foo:root
use foo:pkg1/y
interface x {
use y.{r1}
type my-type = r1
}
"""
],
[
"""
package foo:pkg1
interface y {
record r1 {}
}
"""
],
],
namespace: "foo", package: "root", interfaceName: "x", typeName: "my-type"
)
guard case let .record(record) = type else {
XCTFail("expected record but got \(type)")
return
}
XCTAssertEqual(record.fields, [])
}
func testLookupTopLevelUseIsExternallyInvisible() throws {
XCTAssertThrowsError(
try lookupType(
[
[
"""
package foo:root
use foo:pkg1/y
interface x {
use y.{r1}
type my-type = r1
}
"""
],
[
"""
package foo:pkg1
use foo:pkg2/y
"""
],
[
"""
package foo:pkg2
interface y {
record r1 {}
}
"""
],
],
namespace: "foo", package: "root", interfaceName: "x", typeName: "my-type"
))
}
func testLookupTopLevelUseWithBareIdentifier() throws {
try assertLookup(
"""
package foo:bar
use x as y
interface x {
type my-type = u8
}
interface z {
use y.{my-type}
}
""",
interfaceName: "z", typeName: "my-type", expected: .u8
)
}
func testLookupInInterfaceInWorld() throws {
let packageResolver = try buildPackages(
[
[
"""
package foo:root
use foo:pkg1/y
world x {
import e1: interface {
use y.{t1}
type t2 = t1
}
}
"""
],
[
"""
package foo:pkg1
interface y {
type t1 = u8
}
"""
],
]
)
let rootPkg = try XCTUnwrap(packageResolver.findPackage(namespace: "foo", package: "root", version: nil))
let world = try XCTUnwrap(
rootPkg.sourceFiles[0].items.compactMap {
switch $0 {
case .world(let world): return world
default: return nil
}
}.first)
guard case let .import(importItem) = try XCTUnwrap(world.items.first) else {
XCTFail("expected import item but got \(String(describing: world.items.first))")
return
}
guard case let .interface(name, items) = importItem.kind else {
XCTFail("expected inline interface but got \(importItem.kind)")
return
}
let evaluator = Evaluator()
let lookup = TypeNameLookup(
context: .init(
kind: .inlineInterface(
name: name,
items: items,
sourceFile: rootPkg.sourceFiles[0],
parentWorld: world.name
),
packageUnit: rootPkg,
packageResolver: packageResolver
),
name: "t2",
evaluator: evaluator
)
XCTAssertEqual(try lookup.lookup(), .u8)
}
}
|
