-
Notifications
You must be signed in to change notification settings - Fork 1
/
convert.ts
272 lines (241 loc) · 7.55 KB
/
convert.ts
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
import {
GraphQLSchema,
NamedTypeNode,
TypeDefinitionNode,
GraphQLNamedType,
FieldDefinitionNode,
TypeNode,
EnumValueDefinitionNode,
} from "graphql";
import * as fc from "fast-check";
import { TypeName, Maybe, Output, Kind, Generated } from "./types";
const nodeName = (node: TypeDefinitionNode): TypeName =>
node ? (node.name.value as TypeName) : ("no node" as TypeName);
type FieldReturn = {
output: Generated;
deps: TypeName[];
};
const withNamedFieldType = (namedTypeNode: NamedTypeNode): FieldReturn => {
const name = namedTypeNode.name.value as TypeName;
return { output: getArbitraryName(name), deps: [name] };
};
const withFieldType = (typeNode: TypeNode): FieldReturn => {
if (typeNode.kind === "NamedType") {
return withNamedFieldType(typeNode);
} else if (typeNode.kind === "ListType") {
const internalType = withFieldType(typeNode.type);
return {
output: `fc.array(${internalType.output})` as Generated,
deps: internalType.deps,
};
} else {
// therefore typeNode.kind === 'NonNullType'
// probably need to make a custom Arbitrary for filtering out null values (and add them to all the primitive values by default, ffs)
return withFieldType(typeNode.type);
}
};
const withField = (field: FieldDefinitionNode): FieldReturn => {
const fieldName = field.name.value;
const fieldType = withFieldType(field.type);
return {
output: `${fieldName}: ${fieldType.output}` as Generated,
deps: fieldType.deps,
};
};
const withEnum = (values: readonly EnumValueDefinitionNode[]): Generated => {
const v = values
.map((value) => {
const val = value.name.value;
return `fc.constant("${val}")`;
})
.join(", ");
return `fc.oneof(${v})` as Generated;
};
const withUnion = (types: readonly NamedTypeNode[]): FieldReturn => {
const fieldReturns = types.map(withNamedFieldType);
const output = fieldReturns.map((i) => i.output).join(", ");
return {
output: `fc.oneof(${output})` as Generated,
deps: flattenDeps(fieldReturns),
};
};
const flattenDeps = (fieldReturns: FieldReturn[]): TypeName[] =>
fieldReturns.map((i) => i.deps).reduce((as, a) => as.concat(a), []);
const withAstNode = (name: TypeName, node: TypeDefinitionNode): Output => {
switch (node.kind) {
case "ScalarTypeDefinition":
return {
kind: "Scalar",
name,
output: `fc.anything()` as Generated,
deps: [],
};
case "EnumTypeDefinition":
return {
kind: "Enum",
name,
output: withEnum(node.values || []),
deps: [],
};
case "InputObjectTypeDefinition":
// not yet supported
return { kind: "InputObject", name, output: "" as Generated, deps: [] };
case "InterfaceTypeDefinition":
const iFieldReturns = (node.fields || []).map(withField);
const iFieldOutput = iFieldReturns.map((i) => i.output).join(",");
return {
kind: "Interface",
name,
output: `fc.record({${iFieldOutput}})` as Generated,
deps: flattenDeps(iFieldReturns),
};
case "ObjectTypeDefinition":
const oFieldReturns = (node.fields || []).map(withField);
const oFieldOutput = oFieldReturns.map((i) => i.output).join(",");
return {
kind: "Object",
name,
output: `fc.record({${oFieldOutput}})` as Generated,
deps: flattenDeps(oFieldReturns),
};
case "UnionTypeDefinition":
const uFieldReturns = withUnion(node.types || []);
return {
kind: "Union",
name,
output: uFieldReturns.output,
deps: uFieldReturns.deps,
};
}
};
const withPrimitive = (node: GraphQLNamedType): Generated | null => {
switch (node.name) {
case "Int":
return `fc.integer()` as Generated;
case "Boolean":
return `fc.boolean()` as Generated;
case "String":
return "fc.string()" as Generated;
case "ID":
return `fc.string()` as Generated;
case "Float":
return `fc.float()` as Generated;
}
// console.log(`Primitive ${node.name} not found`);
return null;
};
const getArbitraryName = (typeName: TypeName): Generated =>
`arbitrary${typeName}` as Generated;
const getNamedTypes = (schema: GraphQLSchema): GraphQLNamedType[] => {
const typesMap = schema.getTypeMap();
const namedTypes: Maybe<GraphQLNamedType>[] = Object.keys(typesMap).map(
(key) => {
const item = schema.getType(key);
return item || null;
}
);
return namedTypes.filter(
(a: Maybe<GraphQLNamedType>) => a !== null && a !== undefined
) as GraphQLNamedType[];
};
const withNamedType = (item: GraphQLNamedType): Output | null => {
if (item.astNode) {
return withAstNode(nodeName(item.astNode), item.astNode);
} else {
const prim = withPrimitive(item);
if (prim) {
return {
kind: "Primitive",
name: item.name as TypeName,
output: prim,
deps: [],
};
} else {
return null;
}
}
};
const notNull = <A>(a: A | null): a is A => a !== null;
const byKind = (k: Kind) => (a: Output) => a.kind === k;
const render = (val: Output) => {
const { name, output } = val;
return `export const ${getArbitraryName(name)} = ${output}`;
};
const logThen = <A>(a: A): A => {
console.log(a);
return a;
};
export const getSchemaDeclarations = (schema: GraphQLSchema): string => {
const namedTypes = getNamedTypes(schema);
const primitives = namedTypes
.map(withNamedType)
//.map(logThen)
.filter(notNull)
.filter(byKind("Primitive"))
.map(render)
.join("\n");
const scalars = namedTypes
.map(withNamedType)
//.map(logThen)
.filter(notNull)
.filter(byKind("Scalar"))
.map(render)
.join("\n");
const enums = namedTypes
.map(withNamedType)
//.map(logThen)
.filter(notNull)
.filter(byKind("Enum"))
.map(render)
.join("\n");
const unions = namedTypes
.map(withNamedType)
//.map(logThen)
.filter(notNull)
.filter(byKind("Union"));
const interfaces = namedTypes
.map(withNamedType)
//.map(logThen)
.filter(notNull)
.filter(byKind("Interface"));
const objects = namedTypes
.map(withNamedType)
//.map(logThen)
.filter(notNull)
.filter(byKind("Object"));
const mixed = sortASTs([...unions, ...objects, ...interfaces])
.map(render)
.join("\n");
return `${primitives}\n${enums}\n${scalars}\n${mixed}`;
};
const findableKeys = (key: TypeName) => [
`${getArbitraryName(key)},`,
`${getArbitraryName(key)})`,
`${getArbitraryName(key)}}`,
`${getArbitraryName(key)} `,
];
export const includesOneOf = (val: string, opts: string[]): boolean =>
opts
.map((opt) => val.includes(opt))
.reduce((total, value) => total || value, false);
// if one object mentions another definition, put it after that definition
export const sortASTs = (as: Output[]): Output[] =>
[...as].sort(
({ name: key, output: val }, { name: newKey, output: newVal }) => {
// console.log(`${_a}: ${key}: ${val}`);
// console.log(`${_b}: ${newKey}: ${newVal}`);
const leftMentionsRight = includesOneOf(newVal, findableKeys(key));
const rightMentionsLeft = includesOneOf(val, findableKeys(newKey));
if (leftMentionsRight) {
// console.log(`moving ${key} left to avoid ${newKey}:${newVal}`);
return -1; // move left before right
} else if (rightMentionsLeft) {
// console.log(`${newKey} moves left to go before ${key}:${val}`);
return 1; // move right before left
}
/*console.log(
`Not moving ${key} because it's not found in ${newKey}:${newVal}`
);*/
return 0;
}
);