|
| 1 | +// TracingChannel is marked experimental in Node's docs but is shipped on |
| 2 | +// every runtime graphql-js supports. This test exercises it directly. |
| 3 | +/* eslint-disable n/no-unsupported-features/node-builtins */ |
| 4 | + |
| 5 | +import assert from 'node:assert/strict'; |
| 6 | +import { AsyncLocalStorage } from 'node:async_hooks'; |
| 7 | +import dc from 'node:diagnostics_channel'; |
| 8 | + |
| 9 | +import { buildSchema, execute, parse, subscribe, validate } from 'graphql'; |
| 10 | + |
| 11 | +function runParseCases() { |
| 12 | + // graphql:parse - synchronous. |
| 13 | + { |
| 14 | + const events = []; |
| 15 | + const handler = { |
| 16 | + start: (msg) => events.push({ kind: 'start', source: msg.source }), |
| 17 | + end: (msg) => events.push({ kind: 'end', source: msg.source }), |
| 18 | + asyncStart: (msg) => |
| 19 | + events.push({ kind: 'asyncStart', source: msg.source }), |
| 20 | + asyncEnd: (msg) => events.push({ kind: 'asyncEnd', source: msg.source }), |
| 21 | + error: (msg) => |
| 22 | + events.push({ kind: 'error', source: msg.source, error: msg.error }), |
| 23 | + }; |
| 24 | + |
| 25 | + const channel = dc.tracingChannel('graphql:parse'); |
| 26 | + channel.subscribe(handler); |
| 27 | + |
| 28 | + try { |
| 29 | + const doc = parse('{ field }'); |
| 30 | + assert.equal(doc.kind, 'Document'); |
| 31 | + assert.deepEqual( |
| 32 | + events.map((e) => e.kind), |
| 33 | + ['start', 'end'], |
| 34 | + ); |
| 35 | + assert.equal(events[0].source, '{ field }'); |
| 36 | + assert.equal(events[1].source, '{ field }'); |
| 37 | + } finally { |
| 38 | + channel.unsubscribe(handler); |
| 39 | + } |
| 40 | + } |
| 41 | + |
| 42 | + // graphql:parse - error path fires start, error, end. |
| 43 | + { |
| 44 | + const events = []; |
| 45 | + const handler = { |
| 46 | + start: (msg) => events.push({ kind: 'start', source: msg.source }), |
| 47 | + end: (msg) => events.push({ kind: 'end', source: msg.source }), |
| 48 | + error: (msg) => |
| 49 | + events.push({ kind: 'error', source: msg.source, error: msg.error }), |
| 50 | + }; |
| 51 | + |
| 52 | + const channel = dc.tracingChannel('graphql:parse'); |
| 53 | + channel.subscribe(handler); |
| 54 | + |
| 55 | + try { |
| 56 | + assert.throws(() => parse('{ ')); |
| 57 | + assert.deepEqual( |
| 58 | + events.map((e) => e.kind), |
| 59 | + ['start', 'error', 'end'], |
| 60 | + ); |
| 61 | + assert.ok(events[1].error instanceof Error); |
| 62 | + } finally { |
| 63 | + channel.unsubscribe(handler); |
| 64 | + } |
| 65 | + } |
| 66 | +} |
| 67 | + |
| 68 | +function runValidateCase() { |
| 69 | + const schema = buildSchema(`type Query { field: String }`); |
| 70 | + const doc = parse('{ field }'); |
| 71 | + |
| 72 | + const events = []; |
| 73 | + const handler = { |
| 74 | + start: (msg) => |
| 75 | + events.push({ |
| 76 | + kind: 'start', |
| 77 | + schema: msg.schema, |
| 78 | + document: msg.document, |
| 79 | + }), |
| 80 | + end: () => events.push({ kind: 'end' }), |
| 81 | + error: (msg) => events.push({ kind: 'error', error: msg.error }), |
| 82 | + }; |
| 83 | + |
| 84 | + const channel = dc.tracingChannel('graphql:validate'); |
| 85 | + channel.subscribe(handler); |
| 86 | + |
| 87 | + try { |
| 88 | + const errors = validate(schema, doc); |
| 89 | + assert.deepEqual(errors, []); |
| 90 | + assert.deepEqual( |
| 91 | + events.map((e) => e.kind), |
| 92 | + ['start', 'end'], |
| 93 | + ); |
| 94 | + assert.equal(events[0].schema, schema); |
| 95 | + assert.equal(events[0].document, doc); |
| 96 | + } finally { |
| 97 | + channel.unsubscribe(handler); |
| 98 | + } |
| 99 | +} |
| 100 | + |
| 101 | +function runExecuteCase() { |
| 102 | + const schema = buildSchema(`type Query { hello: String }`); |
| 103 | + const document = parse('query Greeting { hello }'); |
| 104 | + |
| 105 | + const events = []; |
| 106 | + const handler = { |
| 107 | + start: (msg) => |
| 108 | + events.push({ |
| 109 | + kind: 'start', |
| 110 | + operationType: msg.operationType, |
| 111 | + operationName: msg.operationName, |
| 112 | + document: msg.document, |
| 113 | + schema: msg.schema, |
| 114 | + }), |
| 115 | + end: () => events.push({ kind: 'end' }), |
| 116 | + asyncStart: () => events.push({ kind: 'asyncStart' }), |
| 117 | + asyncEnd: () => events.push({ kind: 'asyncEnd' }), |
| 118 | + error: (msg) => events.push({ kind: 'error', error: msg.error }), |
| 119 | + }; |
| 120 | + |
| 121 | + const channel = dc.tracingChannel('graphql:execute'); |
| 122 | + channel.subscribe(handler); |
| 123 | + |
| 124 | + try { |
| 125 | + const result = execute({ |
| 126 | + schema, |
| 127 | + document, |
| 128 | + rootValue: { hello: 'world' }, |
| 129 | + }); |
| 130 | + assert.equal(result.data.hello, 'world'); |
| 131 | + assert.deepEqual( |
| 132 | + events.map((e) => e.kind), |
| 133 | + ['start', 'end'], |
| 134 | + ); |
| 135 | + assert.equal(events[0].operationType, 'query'); |
| 136 | + assert.equal(events[0].operationName, 'Greeting'); |
| 137 | + assert.equal(events[0].document, document); |
| 138 | + assert.equal(events[0].schema, schema); |
| 139 | + } finally { |
| 140 | + channel.unsubscribe(handler); |
| 141 | + } |
| 142 | +} |
| 143 | + |
| 144 | +async function runSubscribeCase() { |
| 145 | + async function* ticks() { |
| 146 | + yield { tick: 'one' }; |
| 147 | + } |
| 148 | + |
| 149 | + const schema = buildSchema(` |
| 150 | + type Query { dummy: String } |
| 151 | + type Subscription { tick: String } |
| 152 | + `); |
| 153 | + // buildSchema doesn't attach a subscribe resolver to fields; inject one. |
| 154 | + schema.getSubscriptionType().getFields().tick.subscribe = () => ticks(); |
| 155 | + |
| 156 | + const document = parse('subscription Tick { tick }'); |
| 157 | + |
| 158 | + const events = []; |
| 159 | + const handler = { |
| 160 | + start: (msg) => |
| 161 | + events.push({ |
| 162 | + kind: 'start', |
| 163 | + operationType: msg.operationType, |
| 164 | + operationName: msg.operationName, |
| 165 | + }), |
| 166 | + end: () => events.push({ kind: 'end' }), |
| 167 | + asyncStart: () => events.push({ kind: 'asyncStart' }), |
| 168 | + asyncEnd: () => events.push({ kind: 'asyncEnd' }), |
| 169 | + error: (msg) => events.push({ kind: 'error', error: msg.error }), |
| 170 | + }; |
| 171 | + |
| 172 | + const channel = dc.tracingChannel('graphql:subscribe'); |
| 173 | + channel.subscribe(handler); |
| 174 | + |
| 175 | + try { |
| 176 | + const result = subscribe({ schema, document }); |
| 177 | + const stream = typeof result.then === 'function' ? await result : result; |
| 178 | + if (stream[Symbol.asyncIterator]) { |
| 179 | + await stream.return?.(); |
| 180 | + } |
| 181 | + // Subscription setup is synchronous here; start/end fire, no async tail. |
| 182 | + assert.deepEqual( |
| 183 | + events.map((e) => e.kind), |
| 184 | + ['start', 'end'], |
| 185 | + ); |
| 186 | + assert.equal(events[0].operationType, 'subscription'); |
| 187 | + assert.equal(events[0].operationName, 'Tick'); |
| 188 | + } finally { |
| 189 | + channel.unsubscribe(handler); |
| 190 | + } |
| 191 | +} |
| 192 | + |
| 193 | +function runResolveCase() { |
| 194 | + const schema = buildSchema( |
| 195 | + `type Query { hello: String nested: Nested } type Nested { leaf: String }`, |
| 196 | + ); |
| 197 | + const document = parse('{ hello nested { leaf } }'); |
| 198 | + |
| 199 | + const events = []; |
| 200 | + const handler = { |
| 201 | + start: (msg) => |
| 202 | + events.push({ |
| 203 | + kind: 'start', |
| 204 | + fieldName: msg.fieldName, |
| 205 | + parentType: msg.parentType, |
| 206 | + fieldType: msg.fieldType, |
| 207 | + fieldPath: msg.fieldPath, |
| 208 | + isDefaultResolver: msg.isDefaultResolver, |
| 209 | + }), |
| 210 | + end: () => events.push({ kind: 'end' }), |
| 211 | + asyncStart: () => events.push({ kind: 'asyncStart' }), |
| 212 | + asyncEnd: () => events.push({ kind: 'asyncEnd' }), |
| 213 | + error: (msg) => events.push({ kind: 'error', error: msg.error }), |
| 214 | + }; |
| 215 | + |
| 216 | + const channel = dc.tracingChannel('graphql:resolve'); |
| 217 | + channel.subscribe(handler); |
| 218 | + |
| 219 | + try { |
| 220 | + const rootValue = { hello: () => 'world', nested: { leaf: 'leaf-value' } }; |
| 221 | + execute({ schema, document, rootValue }); |
| 222 | + |
| 223 | + const starts = events.filter((e) => e.kind === 'start'); |
| 224 | + const paths = starts.map((e) => e.fieldPath); |
| 225 | + assert.deepEqual(paths, ['hello', 'nested', 'nested.leaf']); |
| 226 | + |
| 227 | + const hello = starts.find((e) => e.fieldName === 'hello'); |
| 228 | + assert.equal(hello.parentType, 'Query'); |
| 229 | + assert.equal(hello.fieldType, 'String'); |
| 230 | + // buildSchema never attaches field.resolve; all fields report as trivial. |
| 231 | + assert.equal(hello.isDefaultResolver, true); |
| 232 | + } finally { |
| 233 | + channel.unsubscribe(handler); |
| 234 | + } |
| 235 | +} |
| 236 | + |
| 237 | +function runNoSubscriberCase() { |
| 238 | + const doc = parse('{ field }'); |
| 239 | + assert.equal(doc.kind, 'Document'); |
| 240 | +} |
| 241 | + |
| 242 | +async function runAlsPropagationCase() { |
| 243 | + // A subscriber that binds a store on the `start` sub-channel should be able |
| 244 | + // to read it in every lifecycle handler (start, end, asyncStart, asyncEnd). |
| 245 | + // This is what APMs use to parent child spans to the current operation |
| 246 | + // without threading state through the ctx object. |
| 247 | + const als = new AsyncLocalStorage(); |
| 248 | + const channel = dc.tracingChannel('graphql:execute'); |
| 249 | + channel.start.bindStore(als, (ctx) => ({ operationName: ctx.operationName })); |
| 250 | + |
| 251 | + const seen = {}; |
| 252 | + const handler = { |
| 253 | + start: () => (seen.start = als.getStore()), |
| 254 | + end: () => (seen.end = als.getStore()), |
| 255 | + asyncStart: () => (seen.asyncStart = als.getStore()), |
| 256 | + asyncEnd: () => (seen.asyncEnd = als.getStore()), |
| 257 | + }; |
| 258 | + channel.subscribe(handler); |
| 259 | + |
| 260 | + try { |
| 261 | + const schema = buildSchema(`type Query { slow: String }`); |
| 262 | + const document = parse('query Slow { slow }'); |
| 263 | + const rootValue = { slow: () => Promise.resolve('done') }; |
| 264 | + |
| 265 | + await execute({ schema, document, rootValue }); |
| 266 | + |
| 267 | + assert.deepEqual(seen.start, { operationName: 'Slow' }); |
| 268 | + assert.deepEqual(seen.end, { operationName: 'Slow' }); |
| 269 | + assert.deepEqual(seen.asyncStart, { operationName: 'Slow' }); |
| 270 | + assert.deepEqual(seen.asyncEnd, { operationName: 'Slow' }); |
| 271 | + } finally { |
| 272 | + channel.unsubscribe(handler); |
| 273 | + channel.start.unbindStore(als); |
| 274 | + } |
| 275 | +} |
| 276 | + |
| 277 | +async function main() { |
| 278 | + runParseCases(); |
| 279 | + runValidateCase(); |
| 280 | + runExecuteCase(); |
| 281 | + await runSubscribeCase(); |
| 282 | + runResolveCase(); |
| 283 | + await runAlsPropagationCase(); |
| 284 | + runNoSubscriberCase(); |
| 285 | + console.log('diagnostics integration test passed'); |
| 286 | +} |
| 287 | + |
| 288 | +main(); |
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