hayson_binding_shared/
errors.rs

1use std::io;
2use std::path::Path;
3
4use hayson_engine::atomic::AtomicTemporaryFileError;
5use hayson_engine::catalog::MigrateFormat1Error;
6use hayson_engine::database::DatabaseError;
7use hayson_engine::errors::{HaysonCipherError, HaysonIndexMismatchError};
8use hayson_engine::lock::{DirLockError, LockedError};
9use hayson_engine::table::TableError;
10use hayson_engine::txn::TxnError;
11use serde_json::{json, Map, Value};
12
13/// Envelope version of the JSON carried in every thrown `Error.message`. Bumped only if the shape
14/// below changes incompatibly — the TS shim reads it before trusting `code`.
15pub const ENVELOPE_VERSION: u64 = 1;
16
17/// Stable, machine-readable tags a TS shim switches on to re-throw the matching `HaysonXxxError`.
18/// Every `DatabaseError`/`TableError` variant maps onto exactly one of these.
19pub mod code {
20    pub const VALIDATION: &str = "Validation";
21    pub const UNIQUE_VIOLATION: &str = "UniqueViolation";
22    pub const PENDING_CONFLICT: &str = "PendingConflict";
23    pub const NOT_FOUND: &str = "NotFound";
24    pub const SCHEMA: &str = "Schema";
25    pub const PARTITION: &str = "Partition";
26    pub const RELATION_VIOLATION: &str = "RelationViolation";
27    pub const RELATION_RESTRICT: &str = "RelationRestrict";
28    pub const CIPHER: &str = "Cipher";
29    pub const LOCKED: &str = "Locked";
30    pub const LOCK_LOST: &str = "LockLost";
31    pub const SUSPICIOUS_LOCK_FILE: &str = "SuspiciousLockFile";
32    pub const READ_ONLY: &str = "ReadOnly";
33    pub const FIELD_IN_USE: &str = "FieldInUse";
34    pub const CATALOG: &str = "Catalog";
35    pub const TXN: &str = "Txn";
36    pub const INDEX_MISMATCH: &str = "IndexMismatch";
37    pub const TEMPORARY_FILE: &str = "TemporaryFile";
38    pub const IO: &str = "Io";
39    pub const INVALID_JSON: &str = "InvalidJson";
40    pub const CLOSED: &str = "Closed";
41}
42
43fn envelope(code: &str, message: String, fields: Map<String, Value>) -> Value {
44    let mut object = Map::new();
45    object.insert("envelopeVersion".to_string(), json!(ENVELOPE_VERSION));
46    object.insert("code".to_string(), json!(code));
47    object.insert("message".to_string(), json!(message));
48    for (key, value) in fields {
49        object.insert(key, value);
50    }
51    Value::Object(object)
52}
53
54fn no_fields() -> Map<String, Value> {
55    Map::new()
56}
57
58fn fields(pairs: Value) -> Map<String, Value> {
59    match pairs {
60        Value::Object(map) => map,
61        _ => Map::new(),
62    }
63}
64
65fn describe_cipher_error(error: &HaysonCipherError) -> Value {
66    envelope(
67        code::CIPHER,
68        error.to_string(),
69        fields(json!({
70            "table": error.table,
71            "field": error.field,
72            "reason": error.reason,
73            "keyId": error.key_id,
74        })),
75    )
76}
77
78fn describe_locked_error(error: &LockedError) -> Value {
79    // NOTE: `subject` is the database directory, not the lock file — `DirLock::acquire` takes the
80    // parent of the path it was given before building this error.
81    let dir = error.subject.display().to_string();
82    let holder = error.holder.as_ref().map(|holder| {
83        json!({
84            "owner": holder.owner,
85            "pid": holder.pid,
86            "host": holder.host,
87            "startedAt": holder.started_at,
88            "heartbeatAt": holder.heartbeat_at,
89        })
90    });
91    envelope(
92        code::LOCKED,
93        error.to_string(),
94        fields(json!({ "dir": dir, "holder": holder, "waitedMs": error.waited_ms })),
95    )
96}
97
98/// `table` is the name the call was made against — `TableError` itself carries one only on the
99/// variants built from a `HaysonXxxError`, and even then not on `Io`.
100pub fn describe_table_error(table: &str, error: &TableError) -> Value {
101    let message = error.to_string();
102    match error {
103        TableError::Validation(inner) => envelope(
104            code::VALIDATION,
105            message,
106            fields(json!({
107                "table": inner.table,
108                "issues": inner
109                    .issues
110                    .iter()
111                    .map(|issue| json!({ "field": issue.field, "reason": issue.reason }))
112                    .collect::<Vec<_>>(),
113            })),
114        ),
115        TableError::Unique(inner) => envelope(
116            code::UNIQUE_VIOLATION,
117            message,
118            fields(json!({ "table": inner.table, "field": inner.field, "holder": inner.holder })),
119        ),
120        TableError::Conflict(inner) => envelope(
121            code::PENDING_CONFLICT,
122            message,
123            fields(json!({ "table": inner.table, "key": inner.key, "fields": inner.fields })),
124        ),
125        TableError::NotFound(inner) => envelope(
126            code::NOT_FOUND,
127            message,
128            fields(json!({ "table": inner.table, "key": inner.key })),
129        ),
130        TableError::Schema(_) => envelope(code::SCHEMA, message, fields(json!({ "table": table }))),
131        TableError::Partition(inner) => envelope(
132            code::PARTITION,
133            message,
134            fields(json!({ "table": inner.table, "field": inner.field, "reason": inner.reason })),
135        ),
136        TableError::Relation(inner) => envelope(
137            code::RELATION_VIOLATION,
138            message,
139            fields(json!({
140                "relation": inner.relation,
141                "table": inner.table,
142                "field": inner.field,
143                "value": inner.value,
144            })),
145        ),
146        TableError::RelationRestrict(inner) => envelope(
147            code::RELATION_RESTRICT,
148            message,
149            fields(json!({
150                "relation": inner.relation,
151                "table": inner.table,
152                "key": inner.key,
153                "referencingTable": inner.referencing_table,
154                "referencingField": inner.referencing_field,
155                "referencing": inner.referencing,
156            })),
157        ),
158        TableError::Cipher(inner) => describe_cipher_error(inner),
159        TableError::Io(inner) => describe_io_error(inner),
160    }
161}
162
163/// `checkpoint::restore_or_rebuild` reports a snapshot paired with a different log through
164/// `io::Error::other`, so the typed refusal survives only as the boxed source of that io error.
165/// Without this the shim sees `Io` and cannot tell the index-mismatch refusal from a disk failure.
166fn index_mismatch_of(error: &io::Error) -> Option<&HaysonIndexMismatchError> {
167    error.get_ref()?.downcast_ref::<HaysonIndexMismatchError>()
168}
169
170/// `atomic::open_temporary` refuses a `.tmp` path it could not claim through an `io::Error` that
171/// boxes the typed refusal, so the path and the reason survive only as that boxed source. Without
172/// this the shim sees `Io` — or, on a catalog write, `Catalog` — and the caller loses the one file
173/// it has to remove before retrying.
174fn temporary_file_of(error: &io::Error) -> Option<&AtomicTemporaryFileError> {
175    AtomicTemporaryFileError::downcast(error)
176}
177
178pub fn describe_io_error(error: &io::Error) -> Value {
179    if let Some(inner) = temporary_file_of(error) {
180        return envelope(
181            code::TEMPORARY_FILE,
182            error.to_string(),
183            fields(json!({
184                "path": inner.path.display().to_string(),
185                "reason": inner.reason,
186            })),
187        );
188    }
189    if let Some(inner) = index_mismatch_of(error) {
190        return envelope(
191            code::INDEX_MISMATCH,
192            error.to_string(),
193            fields(json!({
194                "indexPath": inner.path,
195                "logPath": inner.log_path,
196                "watermark": inner.watermark,
197                "expectedHash": inner.expected_hash,
198                "actualHash": inner.actual_hash,
199            })),
200        );
201    }
202    envelope(
203        code::IO,
204        error.to_string(),
205        fields(json!({ "kind": format!("{:?}", error.kind()) })),
206    )
207}
208
209/// The errno name a host raised in a language whose IO errors carry one — Node reports it as
210/// `error.code`, and a caller that means to tell "this file is gone" from "this file is unreadable"
211/// has nothing else to go on. `None` for a kind with no single portable name, in which case the
212/// envelope simply omits it rather than guessing.
213fn errno_name_of(error: &io::Error) -> Option<&'static str> {
214    match error.kind() {
215        io::ErrorKind::NotFound => Some("ENOENT"),
216        io::ErrorKind::PermissionDenied => Some("EACCES"),
217        _ => None,
218    }
219}
220
221/// A [`describe_io_error`] that knows which file failed. `io::Error` carries no path, so only a
222/// call site that kept one can produce this — today `DatabaseError::Log`, raised by the readonly
223/// open probing the logs it is about to take on.
224fn describe_log_io_error(path: &Path, error: &io::Error) -> Value {
225    let mut described = fields(json!({
226        "kind": format!("{:?}", error.kind()),
227        "path": path.display().to_string(),
228    }));
229    if let Some(name) = errno_name_of(error) {
230        described.insert("errnoCode".to_string(), json!(name));
231    }
232    envelope(code::IO, format!("{error}, open \"{}\"", path.display()), described)
233}
234
235/// Public because a binding raises `TxnError::AlreadyCommitted` itself: a unit of work handed to
236/// the engine is consumed there, so a second call on the same host-side handle never reaches the
237/// engine to be refused by it.
238pub fn describe_txn_error(error: &TxnError) -> Value {
239    match error {
240        TxnError::Table(name, inner) => describe_table_error(name, inner),
241        TxnError::Io(inner) => describe_io_error(inner),
242        TxnError::UnknownTable(name) => envelope(code::NOT_FOUND, error.to_string(), fields(json!({ "table": name }))),
243        TxnError::AlreadyCommitted | TxnError::JournalPending(_) => envelope(code::TXN, error.to_string(), no_fields()),
244    }
245}
246
247pub fn describe_database_error(error: &DatabaseError) -> Value {
248    let message = error.to_string();
249    match error {
250        DatabaseError::Lock(DirLockError::Locked(inner)) => describe_locked_error(inner),
251        DatabaseError::Lock(DirLockError::Lost(path)) => envelope(
252            code::LOCK_LOST,
253            message,
254            fields(json!({ "lockPath": path.display().to_string() })),
255        ),
256        DatabaseError::Lock(DirLockError::SuspiciousLockFile(path)) => envelope(
257            code::SUSPICIOUS_LOCK_FILE,
258            message,
259            fields(json!({ "lockPath": path.display().to_string() })),
260        ),
261        DatabaseError::Lock(DirLockError::Io(inner)) => describe_io_error(inner),
262        DatabaseError::Schema(_) => envelope(code::SCHEMA, message, no_fields()),
263        DatabaseError::ReadOnly { dir, operation } => envelope(
264            code::READ_ONLY,
265            message,
266            fields(json!({ "dir": dir.display().to_string(), "operation": operation })),
267        ),
268        DatabaseError::FieldInUse { table, field, records } => envelope(
269            code::FIELD_IN_USE,
270            message,
271            fields(json!({ "table": table, "field": field, "records": records })),
272        ),
273        DatabaseError::Catalog(_) => envelope(code::CATALOG, message, no_fields()),
274        DatabaseError::Io(inner) => describe_io_error(inner),
275        DatabaseError::Log(path, inner) => describe_log_io_error(path, inner),
276        DatabaseError::Table(name, inner) => describe_table_error(name, inner),
277        DatabaseError::Txn(inner) => describe_txn_error(inner),
278        DatabaseError::Cipher(inner) => describe_cipher_error(inner),
279    }
280}
281
282pub fn describe_migrate_format1_error(error: &MigrateFormat1Error) -> Value {
283    let message = error.to_string();
284    match error {
285        MigrateFormat1Error::Schema(_) | MigrateFormat1Error::Write(_) => envelope(code::SCHEMA, message, no_fields()),
286        MigrateFormat1Error::Io(inner) => describe_io_error(inner),
287        MigrateFormat1Error::NotADirectory(path)
288        | MigrateFormat1Error::UnreadableMarker(path, _)
289        | MigrateFormat1Error::UnknownMarker(path, _)
290        | MigrateFormat1Error::NoSchemaFiles(path) => envelope(
291            code::SCHEMA,
292            message,
293            fields(json!({ "path": path.display().to_string() })),
294        ),
295    }
296}
297
298pub fn describe_invalid_json(what: &str, error: &serde_json::Error) -> Value {
299    envelope(
300        code::INVALID_JSON,
301        format!("{what} is not valid JSON: {error}"),
302        fields(json!({ "argument": what })),
303    )
304}
305
306pub fn describe_unknown_table(table: &str, dir: &str) -> Value {
307    envelope(
308        code::NOT_FOUND,
309        format!("table \"{table}\" does not exist in \"{dir}\""),
310        fields(json!({ "table": table, "dir": dir })),
311    )
312}
313
314pub fn describe_closed(operation: &str) -> Value {
315    envelope(
316        code::CLOSED,
317        format!("{operation} was called after the database was closed"),
318        fields(json!({ "operation": operation })),
319    )
320}
321
322/// Free-form refusals raised by this binding itself (a malformed `open` option, an unusable key).
323pub fn describe_schema(message: String) -> Value {
324    envelope(code::SCHEMA, message, no_fields())
325}
326
327pub fn describe_cipher_config(message: String) -> Value {
328    envelope(code::CIPHER, message, fields(json!({ "table": "", "field": "" })))
329}
330
331#[cfg(test)]
332mod tests {
333    use hayson_engine::errors::{
334        HaysonNotFoundError, HaysonPartitionError, HaysonSchemaError, HaysonUniqueViolationError,
335        HaysonValidationError, ValidationIssue,
336    };
337    use hayson_engine::lock::LockHolder;
338    use std::path::PathBuf;
339
340    use super::*;
341
342    fn scratch_dir(prefix: &str) -> PathBuf {
343        let dir = std::env::temp_dir().join(format!(
344            "{prefix}{}-{}",
345            std::process::id(),
346            std::time::SystemTime::now()
347                .duration_since(std::time::UNIX_EPOCH)
348                .unwrap()
349                .as_nanos()
350        ));
351        std::fs::create_dir_all(&dir).unwrap();
352        dir
353    }
354
355    fn code_of(value: &Value) -> &str {
356        value.get("code").and_then(Value::as_str).unwrap()
357    }
358
359    #[test]
360    fn a_validation_error_carries_every_issue_the_shim_needs_to_rebuild_it() {
361        let error = TableError::Validation(HaysonValidationError {
362            table: "users".into(),
363            issues: vec![ValidationIssue {
364                field: "name".into(),
365                reason: "is required".into(),
366            }],
367        });
368
369        let described = describe_table_error("users", &error);
370
371        assert_eq!(code_of(&described), code::VALIDATION);
372        assert_eq!(described["table"], json!("users"));
373        assert_eq!(
374            described["issues"],
375            json!([{ "field": "name", "reason": "is required" }])
376        );
377        assert_eq!(described["envelopeVersion"], json!(ENVELOPE_VERSION));
378        assert_eq!(described["message"], json!(error.to_string()));
379    }
380
381    #[test]
382    fn a_unique_violation_names_the_field_and_the_key_already_holding_it() {
383        let error = TableError::Unique(HaysonUniqueViolationError {
384            table: "users".into(),
385            field: "email".into(),
386            holder: "u1".into(),
387        });
388
389        let described = describe_table_error("users", &error);
390
391        assert_eq!(code_of(&described), code::UNIQUE_VIOLATION);
392        assert_eq!(described["field"], json!("email"));
393        assert_eq!(described["holder"], json!("u1"));
394    }
395
396    #[test]
397    fn a_not_found_error_keeps_the_table_and_key_apart_from_the_message() {
398        let error = TableError::NotFound(HaysonNotFoundError {
399            table: "users".into(),
400            key: "u9".into(),
401        });
402
403        let described = describe_table_error("users", &error);
404
405        assert_eq!(code_of(&described), code::NOT_FOUND);
406        assert_eq!(described["key"], json!("u9"));
407    }
408
409    #[test]
410    fn a_partition_error_is_tagged_apart_from_a_plain_schema_rejection() {
411        let partition = TableError::Partition(HaysonPartitionError::new("events", "day", "is empty"));
412        let schema = TableError::Schema(HaysonSchemaError("no".into()));
413
414        assert_eq!(code_of(&describe_table_error("events", &partition)), code::PARTITION);
415        assert_eq!(code_of(&describe_table_error("events", &schema)), code::SCHEMA);
416    }
417
418    #[test]
419    fn a_cipher_error_carries_the_key_id_it_could_not_use() {
420        let error = TableError::Cipher(Box::new(
421            HaysonCipherError::new("secrets", "token", "cannot be opened").with_key_id("k2"),
422        ));
423
424        let described = describe_table_error("secrets", &error);
425
426        assert_eq!(code_of(&described), code::CIPHER);
427        assert_eq!(described["keyId"], json!("k2"));
428        assert_eq!(described["field"], json!("token"));
429    }
430
431    #[test]
432    fn a_locked_database_reports_the_directory_the_holder_and_how_long_we_waited() {
433        let error = DatabaseError::Lock(DirLockError::Locked(LockedError {
434            // `DirLock::acquire` stores the directory here, not the `.hayson.lock` inside it.
435            subject: PathBuf::from("/data/db"),
436            holder: Some(LockHolder {
437                owner: "0f1e2d3c".into(),
438                pid: Some(42),
439                host: Some("box".into()),
440                started_at: 10,
441                heartbeat_at: 20,
442            }),
443            waited_ms: 250,
444        }));
445
446        let described = describe_database_error(&error);
447
448        assert_eq!(code_of(&described), code::LOCKED);
449        assert_eq!(described["dir"], json!("/data/db"));
450        assert_eq!(described["waitedMs"], json!(250));
451        assert_eq!(described["holder"]["owner"], json!("0f1e2d3c"));
452        assert_eq!(described["holder"]["pid"], json!(42));
453        assert_eq!(described["holder"]["startedAt"], json!(10));
454    }
455
456    #[test]
457    fn a_lock_taken_over_by_another_writer_reports_the_lock_path_under_its_own_code() {
458        let error = DatabaseError::Lock(DirLockError::Lost(PathBuf::from("/data/db/.hayson.lock")));
459
460        let described = describe_database_error(&error);
461
462        assert_eq!(code_of(&described), code::LOCK_LOST);
463        assert_eq!(described["lockPath"], json!("/data/db/.hayson.lock"));
464    }
465
466    #[test]
467    fn a_symlink_planted_at_the_lock_path_reports_the_lock_path_under_its_own_code() {
468        let error = DatabaseError::Lock(DirLockError::SuspiciousLockFile(PathBuf::from("/data/db/.hayson.lock")));
469
470        let described = describe_database_error(&error);
471
472        assert_eq!(code_of(&described), code::SUSPICIOUS_LOCK_FILE);
473        assert_eq!(described["lockPath"], json!("/data/db/.hayson.lock"));
474    }
475
476    #[test]
477    fn a_readonly_refusal_is_told_apart_from_a_genuine_schema_error() {
478        let readonly = DatabaseError::ReadOnly {
479            dir: PathBuf::from("/data/db"),
480            operation: "createTable".into(),
481        };
482        let genuine = DatabaseError::Schema(HaysonSchemaError("field \"id\" has no type".into()));
483
484        let described = describe_database_error(&readonly);
485        assert_eq!(code_of(&described), code::READ_ONLY);
486        assert_eq!(described["operation"], json!("createTable"));
487        assert_eq!(described["dir"], json!("/data/db"));
488
489        assert_eq!(code_of(&describe_database_error(&genuine)), code::SCHEMA);
490    }
491
492    #[test]
493    fn a_residual_field_refusal_is_told_apart_from_a_plain_catalog_error() {
494        let in_use = DatabaseError::FieldInUse {
495            table: "users".into(),
496            field: "name".into(),
497            records: 3,
498        };
499        let plain = DatabaseError::Catalog("table \"ghost\" does not exist in \"/data/db\"".into());
500
501        let described = describe_database_error(&in_use);
502        assert_eq!(code_of(&described), code::FIELD_IN_USE);
503        assert_eq!(described["table"], json!("users"));
504        assert_eq!(described["field"], json!("name"));
505        assert_eq!(described["records"], json!(3));
506
507        assert_eq!(code_of(&describe_database_error(&plain)), code::CATALOG);
508    }
509
510    #[test]
511    fn a_table_scoped_database_error_is_described_as_its_inner_table_error() {
512        let error = DatabaseError::Table(
513            "users".into(),
514            TableError::NotFound(HaysonNotFoundError {
515                table: "users".into(),
516                key: "u9".into(),
517            }),
518        );
519
520        assert_eq!(code_of(&describe_database_error(&error)), code::NOT_FOUND);
521    }
522
523    #[test]
524    fn an_unknown_table_inside_a_unit_of_work_is_reported_as_not_found() {
525        let error = DatabaseError::Txn(TxnError::UnknownTable("ghost".into()));
526
527        let described = describe_database_error(&error);
528
529        assert_eq!(code_of(&described), code::NOT_FOUND);
530        assert_eq!(described["table"], json!("ghost"));
531    }
532
533    #[test]
534    fn an_io_failure_keeps_its_kind_so_the_shim_can_tell_missing_from_denied() {
535        let error = DatabaseError::Io(io::Error::new(io::ErrorKind::PermissionDenied, "nope"));
536
537        let described = describe_database_error(&error);
538
539        assert_eq!(code_of(&described), code::IO);
540        assert_eq!(described["kind"], json!("PermissionDenied"));
541    }
542
543    #[test]
544    fn an_io_failure_the_engine_could_name_a_file_for_carries_the_path_and_the_errno_name() {
545        let error = DatabaseError::Log(
546            PathBuf::from("/data/db/notes/note.jsonl"),
547            io::Error::from(io::ErrorKind::NotFound),
548        );
549
550        let described = describe_database_error(&error);
551
552        assert_eq!(code_of(&described), code::IO);
553        assert_eq!(described["path"], json!("/data/db/notes/note.jsonl"));
554        assert_eq!(described["errnoCode"], json!("ENOENT"));
555    }
556
557    #[test]
558    fn an_io_kind_with_no_portable_errno_name_leaves_the_field_out_rather_than_guessing() {
559        let error = DatabaseError::Log(
560            PathBuf::from("/data/db/notes.jsonl"),
561            io::Error::new(io::ErrorKind::InvalidData, "garbled"),
562        );
563
564        let described = describe_database_error(&error);
565
566        assert_eq!(described["path"], json!("/data/db/notes.jsonl"));
567        assert!(described.get("errnoCode").is_none(), "{described}");
568    }
569
570    #[test]
571    fn a_read_that_failed_to_decrypt_arrives_typed_with_the_key_id_the_flattened_text_used_to_lose() {
572        let error = TableError::Cipher(Box::new(
573            HaysonCipherError::new("secrets", "token", "was written with key \"k1\", which is not on hand")
574                .with_key_id("k1"),
575        ));
576
577        let described = describe_table_error("secrets", &error);
578
579        assert_eq!(code_of(&described), code::CIPHER);
580        assert_eq!(described["table"], json!("secrets"));
581        assert_eq!(described["field"], json!("token"));
582        assert_eq!(described["keyId"], json!("k1"));
583    }
584
585    #[test]
586    fn an_io_failure_on_a_read_stays_an_io_failure_now_that_nothing_reads_its_text() {
587        let corrupt = TableError::Io(io::Error::new(
588            io::ErrorKind::InvalidData,
589            "log \"a.jsonl\" is corrupt at offset 12",
590        ));
591
592        assert_eq!(code_of(&describe_table_error("notes", &corrupt)), code::IO);
593    }
594
595    #[test]
596    fn a_search_against_a_table_with_no_fulltext_field_arrives_as_a_typed_schema_refusal() {
597        let error = TableError::Schema(HaysonSchemaError(
598            "table \"users\" has no field marked \"fulltext\": true — search is not available".into(),
599        ));
600
601        let described = describe_table_error("users", &error);
602
603        assert_eq!(code_of(&described), code::SCHEMA);
604        assert_eq!(described["table"], json!("users"));
605    }
606
607    #[test]
608    fn a_refused_index_snapshot_travels_under_its_own_code_with_both_paths_and_the_watermark() {
609        let error = DatabaseError::Io(io::Error::other(HaysonIndexMismatchError {
610            path: "/data/db/users.idx".into(),
611            log_path: "/data/db/users.jsonl".into(),
612            watermark: 397,
613            expected_hash: "9f2c000000000000".into(),
614            actual_hash: "4b1e000000000000".into(),
615        }));
616
617        let described = describe_database_error(&error);
618
619        assert_eq!(code_of(&described), code::INDEX_MISMATCH);
620        assert_eq!(described["indexPath"], json!("/data/db/users.idx"));
621        assert_eq!(described["logPath"], json!("/data/db/users.jsonl"));
622        assert_eq!(described["watermark"], json!(397));
623        assert_eq!(described["expectedHash"], json!("9f2c000000000000"));
624        assert_eq!(described["actualHash"], json!("4b1e000000000000"));
625        assert_eq!(described["message"], json!(error.to_string()));
626    }
627
628    #[test]
629    fn a_temporary_path_that_could_not_be_claimed_travels_under_its_own_code_with_path_and_reason() {
630        let dir = scratch_dir("hayson-envelope-temporary-");
631        // A directory on the .tmp path: open_exclusive reports AlreadyExists and remove_file cannot
632        // clear it, which is the shape of the refusal a catalog write hits on EISDIR.
633        let temporary = dir.join("hayson.json.tmp");
634        std::fs::create_dir(&temporary).unwrap();
635        let refusal = hayson_engine::atomic::open_temporary(&temporary, None).unwrap_err();
636        let message = refusal.to_string();
637        let error = DatabaseError::Io(refusal);
638
639        let described = describe_database_error(&error);
640        std::fs::remove_dir_all(&dir).unwrap();
641
642        assert_eq!(code_of(&described), code::TEMPORARY_FILE);
643        assert_eq!(described["path"], json!(temporary.display().to_string()));
644        assert_eq!(described["reason"], json!("is in the way and could not be cleared, so nothing on disk was changed — remove whatever holds that path and retry"));
645        assert_eq!(described["message"], json!(message));
646    }
647
648    #[test]
649    fn an_io_error_that_boxes_nothing_typed_is_still_reported_as_io() {
650        let error = io::Error::other("snapshot \"a.idx\" claims watermark and schema match the log");
651
652        assert_eq!(code_of(&describe_io_error(&error)), code::IO);
653    }
654}
hayson_binding_shared/errors.rs

hayson_binding_shared/
errors.rs
