automapper_validation/eval/
evaluator.rs

1//! Core condition evaluation traits.
2
3use super::context::EvaluationContext;
4
5/// Three-valued result of evaluating a single condition.
6///
7/// Unlike the C# implementation which uses `bool`, we use three-valued logic
8/// to support partial evaluation when external conditions are unavailable.
9#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
10pub enum ConditionResult {
11    /// The condition is satisfied.
12    True,
13    /// The condition is not satisfied.
14    False,
15    /// The condition cannot be determined (e.g., external condition without a provider).
16    Unknown,
17}
18
19impl ConditionResult {
20    /// Returns `true` if this is `ConditionResult::True`.
21    pub fn is_true(self) -> bool {
22        matches!(self, ConditionResult::True)
23    }
24
25    /// Returns `true` if this is `ConditionResult::False`.
26    pub fn is_false(self) -> bool {
27        matches!(self, ConditionResult::False)
28    }
29
30    /// Returns `true` if this is `ConditionResult::Unknown`.
31    pub fn is_unknown(self) -> bool {
32        matches!(self, ConditionResult::Unknown)
33    }
34
35    /// Three-valued AND: `False` if either is, `True` if both are, else `Unknown`.
36    pub fn and(self, other: ConditionResult) -> ConditionResult {
37        match (self, other) {
38            (ConditionResult::False, _) | (_, ConditionResult::False) => ConditionResult::False,
39            (ConditionResult::True, ConditionResult::True) => ConditionResult::True,
40            _ => ConditionResult::Unknown,
41        }
42    }
43
44    /// Three-valued OR: `True` if either is, `False` if both are, else `Unknown`.
45    pub fn or(self, other: ConditionResult) -> ConditionResult {
46        match (self, other) {
47            (ConditionResult::True, _) | (_, ConditionResult::True) => ConditionResult::True,
48            (ConditionResult::False, ConditionResult::False) => ConditionResult::False,
49            _ => ConditionResult::Unknown,
50        }
51    }
52
53    /// Three-valued NOT.
54    pub fn negate(self) -> ConditionResult {
55        match self {
56            ConditionResult::True => ConditionResult::False,
57            ConditionResult::False => ConditionResult::True,
58            ConditionResult::Unknown => ConditionResult::Unknown,
59        }
60    }
61
62    /// Converts to `Option<bool>`: True -> Some(true), False -> Some(false), Unknown -> None.
63    pub fn to_option(self) -> Option<bool> {
64        match self {
65            ConditionResult::True => Some(true),
66            ConditionResult::False => Some(false),
67            ConditionResult::Unknown => None,
68        }
69    }
70}
71
72impl From<bool> for ConditionResult {
73    fn from(value: bool) -> Self {
74        if value {
75            ConditionResult::True
76        } else {
77            ConditionResult::False
78        }
79    }
80}
81
82impl std::fmt::Display for ConditionResult {
83    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
84        match self {
85            ConditionResult::True => write!(f, "True"),
86            ConditionResult::False => write!(f, "False"),
87            ConditionResult::Unknown => write!(f, "Unknown"),
88        }
89    }
90}
91
92/// Evaluates individual AHB conditions by number.
93///
94/// Implementations are typically generated from AHB XML schemas (one per
95/// message type and format version). Each condition number maps to a
96/// specific business rule check.
97pub trait ConditionEvaluator: Send + Sync {
98    /// Evaluate a single condition by number.
99    ///
100    /// Returns `ConditionResult::Unknown` for unrecognized condition numbers
101    /// or conditions that require unavailable external context.
102    fn evaluate(&self, condition: u32, ctx: &EvaluationContext) -> ConditionResult;
103
104    /// Returns `true` if the given condition requires external context
105    /// (i.e., cannot be determined from the EDIFACT message alone).
106    fn is_external(&self, condition: u32) -> bool;
107
108    /// Returns `true` if this evaluator has an implementation for the given
109    /// condition number (whether internal or external). Conditions that fall
110    /// through to the `_ => Unknown` wildcard return `false`.
111    ///
112    /// This allows distinguishing "implemented but returned Unknown because
113    /// the relevant data isn't present in the message" from "not implemented
114    /// at all".
115    fn is_known(&self, _condition: u32) -> bool {
116        false
117    }
118
119    /// Returns the message type this evaluator handles (e.g., "UTILMD").
120    fn message_type(&self) -> &str;
121
122    /// Returns the format version this evaluator handles (e.g., "FV2510").
123    fn format_version(&self) -> &str;
124}
125
126impl<T: ConditionEvaluator + ?Sized> ConditionEvaluator for std::sync::Arc<T> {
127    fn evaluate(&self, condition: u32, ctx: &EvaluationContext) -> ConditionResult {
128        (**self).evaluate(condition, ctx)
129    }
130
131    fn is_external(&self, condition: u32) -> bool {
132        (**self).is_external(condition)
133    }
134
135    fn is_known(&self, condition: u32) -> bool {
136        (**self).is_known(condition)
137    }
138
139    fn message_type(&self) -> &str {
140        (**self).message_type()
141    }
142
143    fn format_version(&self) -> &str {
144        (**self).format_version()
145    }
146}
147
148/// Provider for external conditions that depend on context outside the EDIFACT message.
149///
150/// External conditions are things like:
151/// - [1] "Wenn Aufteilung vorhanden" (message splitting status)
152/// - [14] "Wenn Datum bekannt" (whether a date is known)
153/// - [30] "Wenn Antwort auf Aktivierung" (response to activation)
154///
155/// These cannot be determined from the EDIFACT content alone and require
156/// business context from the calling system.
157pub trait ExternalConditionProvider: Send + Sync {
158    /// Evaluate an external condition by name.
159    ///
160    /// The `condition_name` corresponds to the speaking name from the
161    /// generated external conditions constants (e.g., "MessageSplitting",
162    /// "DateKnown").
163    fn evaluate(&self, condition_name: &str) -> ConditionResult;
164
165    /// The present moment, for conditions that compare against it: UTILMD
166    /// `[494]` "das hier genannte Datum muss der Zeitpunkt sein, zu dem das
167    /// Dokument erstellt wurde, oder ein Zeitpunkt, der davor liegt". The
168    /// wall clock by default; a caller on a simulated clock overrides it.
169    fn now(&self) -> chrono::DateTime<chrono::Utc> {
170        chrono::Utc::now()
171    }
172}
173
174/// A no-op external condition provider that returns `Unknown` for everything.
175///
176/// Useful when no external context is available — conditions will propagate
177/// as `Unknown` through the expression evaluator.
178pub struct NoOpExternalProvider;
179
180impl ExternalConditionProvider for NoOpExternalProvider {
181    fn evaluate(&self, _condition_name: &str) -> ConditionResult {
182        ConditionResult::Unknown
183    }
184}
185
186/// The number of a message type's bare "Wenn vorhanden" condition, if it has one.
187///
188/// The condition is self-referential: its value is whether the element or
189/// group it annotates is present. `Soll [166]` on a group means "send it if
190/// you have it", which only the sender knows, so an absent group annotated
191/// with it is never missing. The generated evaluators answer it with `True`
192/// ("the rule applies wherever it is evaluated"), which is right for a present
193/// element and wrong for an absent one — see [`AbsentTarget`].
194///
195/// The numbers are stable across every format version in
196/// `xml-migs-and-ahbs/` (FV2410–FV2610); keyed by [`ConditionEvaluator::message_type`]
197/// rather than by evaluator so aliased and regenerated evaluators need no edit.
198pub fn presence_condition(message_type: &str) -> Option<u32> {
199    match message_type {
200        "UTILMD_Strom" | "UTILMD_Gas" => Some(166),
201        "INVOIC" => Some(22),
202        "ORDERS" => Some(12),
203        _ => None,
204    }
205}
206
207/// Every condition of a message type that answers "does the annotated thing
208/// exist?", which an absent element or group answers with no.
209///
210/// The [`presence_condition`], plus conditions that ask for one repetition per
211/// real-world object the message cannot see. UTILMD_Strom [2003] ("Einmal für
212/// jede ruhende Marktlokation, die der Marktlokation »Kundenanlage« …
213/// untergeordnet ist", FV2504–FV2610, absent in Gas) is `Soll` on the ruhende
214/// Marktlokation: zero ruhende MaLos means zero groups, and only the sender
215/// knows how many exist. The generated evaluators cannot decide it and answer
216/// `Unknown`, which reported every message without a ruhende MaLo.
217pub fn presence_conditions(message_type: &str) -> &'static [u32] {
218    match message_type {
219        "UTILMD_Strom" => &[166, 2003],
220        "UTILMD_Gas" => &[166],
221        "INVOIC" => &[22],
222        "ORDERS" => &[12],
223        _ => &[],
224    }
225}
226
227/// The condition of a message type that allows a group or segment once per
228/// transaction, and the transaction group: UTILMD's `[2061]` "Segment bzw.
229/// Segmentgruppe ist genau einmal je SG4 IDE (Vorgang) anzugeben" (Strom and
230/// Gas, FV2504–FV2610). The conditions evaluate it as `True` wherever there is
231/// a transaction, so what it limits — the count — is checked on its own; see
232/// [`binds_once`].
233pub fn once_per_transaction(message_type: &str) -> Option<(u32, &'static str)> {
234    match message_type {
235        "UTILMD_Strom" | "UTILMD_Gas" => Some((2061, "SG4")),
236        _ => None,
237    }
238}
239
240/// A transaction (Vorgang) of a message type: the top-level group it repeats
241/// as, and where that group's entry segment carries the transaction's
242/// reference, which an APERAK names in SG5 RFF+TN DE1154.
243#[derive(Debug, Clone, Copy, PartialEq, Eq)]
244pub struct Vorgang {
245    /// The group (`SG4`).
246    pub group: &'static str,
247    /// Its entry segment (`IDE`).
248    pub tag: &'static str,
249    /// The reference's element and component in that segment.
250    pub element: usize,
251    pub component: usize,
252}
253
254/// The transactions of a message type, as the APERAK MIG lists them (SG5
255/// RFF+TN DE1154, FV2504–FV2610):
256///
257/// - IFTSTA: SG4 EQD DE8260, or SG14 CNI DE1490 — each Prüfidentifikator has
258///   one of the two;
259/// - INSRPT: SG3 DOC DE1004;
260/// - UTILMD: SG4 IDE DE7402;
261/// - UTILTS: SG5 IDE DE7402.
262///
263/// Every other message type has none. `message_type` is a variant
264/// (`UTILMD_Strom`) or a message type (`UTILMD`).
265pub fn transactions(message_type: &str) -> &'static [Vorgang] {
266    const IDE_SG4: Vorgang = Vorgang {
267        group: "SG4",
268        tag: "IDE",
269        element: 1,
270        component: 0,
271    };
272    const IDE_SG5: Vorgang = Vorgang {
273        group: "SG5",
274        tag: "IDE",
275        element: 1,
276        component: 0,
277    };
278    const DOC: Vorgang = Vorgang {
279        group: "SG3",
280        tag: "DOC",
281        element: 1,
282        component: 0,
283    };
284    const EQD: Vorgang = Vorgang {
285        group: "SG4",
286        tag: "EQD",
287        element: 1,
288        component: 0,
289    };
290    const CNI: Vorgang = Vorgang {
291        group: "SG14",
292        tag: "CNI",
293        element: 0,
294        component: 0,
295    };
296    match message_type.split('_').next().unwrap_or_default() {
297        "UTILMD" => &[IDE_SG4],
298        "UTILTS" => &[IDE_SG5],
299        "INSRPT" => &[DOC],
300        "IFTSTA" => &[EQD, CNI],
301        _ => &[],
302    }
303}
304
305/// Whether `group_id` is a transaction group of `message_type`, whose
306/// conditions the AHB states per transaction. The validator evaluates each
307/// repetition against the message as that transaction sees it
308/// (`mig_assembly::transaction_view`, #337).
309pub fn is_transaction_group(message_type: &str, group_id: &str) -> bool {
310    transactions(message_type)
311        .iter()
312        .any(|v| v.group == group_id)
313}
314
315/// Whether `status` limits what it annotates to once per transaction: the
316/// condition `once` is a conjunct of every line (`Muss [483] ∧ [2061]`). Where
317/// it sits in one branch only (`Soll [165] ∧ (([2061] ∧ [583]) ∨ [584])`), the
318/// other branch allows more.
319pub fn binds_once(status: &str, once: u32) -> bool {
320    fn conjunct(expr: &crate::expr::ConditionExpr, once: u32) -> bool {
321        match expr {
322            crate::expr::ConditionExpr::Ref(id) => *id == once,
323            crate::expr::ConditionExpr::And(exprs) => exprs.iter().any(|e| conjunct(e, once)),
324            _ => false,
325        }
326    }
327    let lines: Vec<&str> = status
328        .lines()
329        .map(str::trim)
330        .filter(|l| !l.is_empty())
331        .collect();
332    !lines.is_empty()
333        && lines.iter().all(|line| {
334            matches!(
335                crate::expr::ConditionParser::parse(line),
336                Ok(Some(expr)) if conjunct(&expr, once)
337            )
338        })
339}
340
341/// Evaluates conditions for an element or group that is known to be absent.
342///
343/// Identical to the wrapped evaluator except that the message type's
344/// [`presence_conditions`] are `False`: whatever the condition annotates is not
345/// there. Use it wherever a status is evaluated to decide whether something
346/// missing is required.
347pub struct AbsentTarget<'a, E: ConditionEvaluator + ?Sized>(pub &'a E);
348
349impl<E: ConditionEvaluator + ?Sized> ConditionEvaluator for AbsentTarget<'_, E> {
350    fn evaluate(&self, condition: u32, ctx: &EvaluationContext) -> ConditionResult {
351        if presence_conditions(self.0.message_type()).contains(&condition) {
352            return ConditionResult::False;
353        }
354        self.0.evaluate(condition, ctx)
355    }
356
357    fn is_external(&self, condition: u32) -> bool {
358        self.0.is_external(condition)
359    }
360
361    fn is_known(&self, condition: u32) -> bool {
362        self.0.is_known(condition)
363    }
364
365    fn message_type(&self) -> &str {
366        self.0.message_type()
367    }
368
369    fn format_version(&self) -> &str {
370        self.0.format_version()
371    }
372}
373
374/// Evaluates conditions for an element or group that is known to be present,
375/// to decide whether it is allowed there.
376///
377/// The message type's [`presence_conditions`] are `True`: whatever the
378/// condition annotates is there. Only the AHB's conditions proper (`[1]` to
379/// `[499]`) decide; notes (`[500]`–`[899]`), formats (`[900]`–`[999]`) and
380/// repetition rules (`[2000]` and up: "genau einmal je SG8 …") say nothing about
381/// whether something may be sent, and are `Unknown` — so `[197] ∧ [2308]` is
382/// false when `[197]` is, and `[2317] ⊻ [2318]` is never.
383pub struct PresentTarget<'a, E: ConditionEvaluator + ?Sized>(pub &'a E);
384
385impl<E: ConditionEvaluator + ?Sized> ConditionEvaluator for PresentTarget<'_, E> {
386    fn evaluate(&self, condition: u32, ctx: &EvaluationContext) -> ConditionResult {
387        if presence_conditions(self.0.message_type()).contains(&condition) {
388            return ConditionResult::True;
389        }
390        if !(1..500).contains(&condition) {
391            return ConditionResult::Unknown;
392        }
393        self.0.evaluate(condition, ctx)
394    }
395
396    fn is_external(&self, condition: u32) -> bool {
397        self.0.is_external(condition)
398    }
399
400    fn is_known(&self, condition: u32) -> bool {
401        self.0.is_known(condition)
402    }
403
404    fn message_type(&self) -> &str {
405        self.0.message_type()
406    }
407
408    fn format_version(&self) -> &str {
409        self.0.format_version()
410    }
411}
412
413/// Whether something present under `status` is not allowed where `ctx` is: a
414/// `Muss`/`X` status with a condition that evaluates to false through
415/// [`PresentTarget`]. `Soll`/`Kann`, an unconditional status, an undecidable
416/// condition, a package (`[19P1..1]`, judged by its own check) and a status of
417/// several lines refuse nothing.
418pub fn refuses_presence<E: ConditionEvaluator + ?Sized>(
419    status: &str,
420    evaluator: &E,
421    ctx: &EvaluationContext,
422    ub_definitions: &std::collections::BTreeMap<String, crate::expr::ConditionExpr>,
423) -> bool {
424    refuses(status, &PresentTarget(evaluator), ctx, ub_definitions)
425}
426
427/// The repetition conditions of a message type whose evaluators count what
428/// they limit in the group they name, so that a false one means "sent too
429/// often there": ORDERS `[2005]` / `[2006]`, "Pro SG29 LIN ist die SG34
430/// RFF+Z09 (Gerätenummer) genau einmal / bis zu dreimal anzugeben". Most
431/// `[2000]`+ evaluators still count over the whole message; a condition joins
432/// this list once its evaluator is verified to count per instance.
433pub fn counted_repetitions(message_type: &str) -> &'static [u32] {
434    match message_type {
435        "ORDERS" => &[2005, 2006],
436        _ => &[],
437    }
438}
439
440/// The conditions of a message type that say which value a reference holds:
441/// UTILMD Strom `[22]` and UTILTS `[59]`, "Es ist die Zeitraum-ID vom DE1156
442/// aus einem passenden SG6 RFF+Z49 (…) einzutragen" on the SEQ's DE1050. One
443/// that is false names a Zeitraum the transaction does not have: the
444/// reference is wrong, not merely not required (APERAK Z21).
445pub fn reference_conditions(message_type: &str) -> &'static [u32] {
446    match message_type {
447        "UTILMD_Strom" => &[22],
448        "UTILTS" => &[59],
449        _ => &[],
450    }
451}
452
453/// The repetition conditions of a message type that set how often a segment
454/// is sent in its group instance where they apply, as `(condition, min,
455/// max)`: UTILMD Strom `[2317]` "… CAV+MIW/MPW/MUW vorhanden, ist das Segment
456/// mindestens zweimal anzugeben" and `[2318]` "… CAV+MBW vorhanden, … genau
457/// einmal" on the Wandler's CAV+Z30. Their evaluators say whether one applies
458/// there (which also makes the segment required); the count is judged by
459/// [`breaks_repetition_limit`].
460pub fn repetition_limits(message_type: &str) -> &'static [(u32, usize, Option<usize>)] {
461    match message_type {
462        "UTILMD_Strom" => &[(2317, 2, None), (2318, 1, Some(1))],
463        _ => &[],
464    }
465}
466
467/// Whether `count` segments under `status` break a [`repetition_limits`]
468/// condition the status names and that applies where `ctx` is.
469pub fn breaks_repetition_limit<E: ConditionEvaluator + ?Sized>(
470    status: &str,
471    evaluator: &E,
472    ctx: &EvaluationContext,
473    count: usize,
474) -> bool {
475    repetition_limits(evaluator.message_type())
476        .iter()
477        .filter(|(id, _, _)| status.contains(&format!("[{id}]")))
478        .any(|&(id, min, max)| {
479            evaluator.evaluate(id, ctx) == ConditionResult::True
480                && (count < min || max.is_some_and(|max| count > max))
481        })
482}
483
484/// [`PresentTarget`], except that the message type's
485/// [`counted_repetitions`] are evaluated.
486struct CountTarget<'a, E: ConditionEvaluator + ?Sized>(&'a E);
487
488impl<E: ConditionEvaluator + ?Sized> ConditionEvaluator for CountTarget<'_, E> {
489    fn evaluate(&self, condition: u32, ctx: &EvaluationContext) -> ConditionResult {
490        if counted_repetitions(self.0.message_type()).contains(&condition) {
491            return self.0.evaluate(condition, ctx);
492        }
493        PresentTarget(self.0).evaluate(condition, ctx)
494    }
495
496    fn is_external(&self, condition: u32) -> bool {
497        self.0.is_external(condition)
498    }
499
500    fn is_known(&self, condition: u32) -> bool {
501        self.0.is_known(condition)
502    }
503
504    fn message_type(&self) -> &str {
505        self.0.message_type()
506    }
507
508    fn format_version(&self) -> &str {
509        self.0.format_version()
510    }
511}
512
513/// Whether something present under `status` is sent more often than it allows
514/// where `ctx` is: [`refuses_presence`] does not refuse it, but does once the
515/// message type's [`counted_repetitions`] are evaluated. ORDERS 17009's SG34
516/// `Muss ([102] ∧ [2006]) ⊻ ([103] ∧ [2005])` holds for the second RFF+Z09
517/// of a Zähleinrichtung as far as presence goes; `[2005]` refuses it.
518pub fn refuses_count<E: ConditionEvaluator + ?Sized>(
519    status: &str,
520    evaluator: &E,
521    ctx: &EvaluationContext,
522    ub_definitions: &std::collections::BTreeMap<String, crate::expr::ConditionExpr>,
523) -> bool {
524    let counted = counted_repetitions(evaluator.message_type());
525    let names_one = status.split('[').skip(1).any(|term| {
526        term.split(']')
527            .next()
528            .and_then(|id| id.parse::<u32>().ok())
529            .is_some_and(|id| counted.contains(&id))
530    });
531    names_one
532        && !refuses_presence(status, evaluator, ctx, ub_definitions)
533        && refuses(status, &CountTarget(evaluator), ctx, ub_definitions)
534}
535
536/// Whether a `Muss`/`X` `status` evaluates to false through `target`; see
537/// [`refuses_presence`] for what refuses nothing.
538fn refuses<E: ConditionEvaluator>(
539    status: &str,
540    target: &E,
541    ctx: &EvaluationContext,
542    ub_definitions: &std::collections::BTreeMap<String, crate::expr::ConditionExpr>,
543) -> bool {
544    let status = status.trim();
545    let package = status.split('[').skip(1).any(|term| {
546        term.trim_start_matches(|c: char| c.is_ascii_digit())
547            .starts_with('P')
548    });
549    if status.contains('\n') || !status.contains('[') || package {
550        return false;
551    }
552    let keyword = &status[..status
553        .find(|c: char| !c.is_alphabetic())
554        .unwrap_or(status.len())];
555    if !matches!(keyword, "Muss" | "X") {
556        return false;
557    }
558    super::ConditionExprEvaluator::new(target).evaluate_status_with_ub(status, ctx, ub_definitions)
559        == ConditionResult::False
560}
561
562#[cfg(test)]
563mod tests {
564    use super::*;
565
566    struct AlwaysTrue(&'static str);
567
568    impl ConditionEvaluator for AlwaysTrue {
569        fn evaluate(&self, _: u32, _: &EvaluationContext) -> ConditionResult {
570            ConditionResult::True
571        }
572        fn is_external(&self, _: u32) -> bool {
573            false
574        }
575        fn message_type(&self) -> &str {
576            self.0
577        }
578        fn format_version(&self) -> &str {
579            "FV2604"
580        }
581    }
582
583    #[test]
584    fn once_per_transaction_binds_where_every_line_has_it() {
585        assert!(binds_once("Muss [483] ∧ [2061]", 2061));
586        assert!(binds_once("Muss [2061]", 2061));
587        assert!(binds_once(
588            "Muss ([77] ∧ [78]) ∧ [347] ∧ [2061]\r\nKann [2061]",
589            2061
590        ));
591        assert!(!binds_once("Soll [165] ∧ (([2061] ∧ [583]) ∨ [584])", 2061));
592        assert!(!binds_once(
593            "Muss ([32] ∧ [2061] ∧ [651]) ⊻ ([200] ∧ [601])",
594            2061
595        ));
596        assert!(!binds_once("Muss [483]", 2061));
597        assert!(!binds_once("", 2061));
598    }
599
600    #[test]
601    fn absent_target_answers_only_the_presence_condition_with_false() {
602        let external = NoOpExternalProvider;
603        let ctx = EvaluationContext::new("55043", &external, &[]);
604        let inner = AlwaysTrue("UTILMD_Strom");
605        let absent = AbsentTarget(&inner);
606        assert_eq!(absent.evaluate(166, &ctx), ConditionResult::False);
607        assert_eq!(absent.evaluate(674, &ctx), ConditionResult::True);
608        // [2003]: one group per ruhende Marktlokation the sender knows of.
609        assert_eq!(absent.evaluate(2003, &ctx), ConditionResult::False);
610
611        // [166] of another message type is an unrelated condition.
612        let invoic = AlwaysTrue("INVOIC");
613        assert_eq!(
614            AbsentTarget(&invoic).evaluate(166, &ctx),
615            ConditionResult::True
616        );
617        assert_eq!(
618            AbsentTarget(&invoic).evaluate(22, &ctx),
619            ConditionResult::False
620        );
621    }
622
623    #[test]
624    fn test_condition_result_is_methods() {
625        assert!(ConditionResult::True.is_true());
626        assert!(!ConditionResult::True.is_false());
627        assert!(!ConditionResult::True.is_unknown());
628
629        assert!(!ConditionResult::False.is_true());
630        assert!(ConditionResult::False.is_false());
631
632        assert!(ConditionResult::Unknown.is_unknown());
633    }
634
635    #[test]
636    fn three_valued_and_or_not() {
637        use ConditionResult::{False as F, True as T, Unknown as U};
638        assert_eq!(T.and(T), T);
639        assert_eq!(T.and(U), U);
640        assert_eq!(U.and(F), F);
641        assert_eq!(F.or(F), F);
642        assert_eq!(F.or(U), U);
643        assert_eq!(U.or(T), T);
644        assert_eq!(U.negate(), U);
645        assert_eq!(T.negate(), F);
646    }
647
648    #[test]
649    fn test_condition_result_to_option() {
650        assert_eq!(ConditionResult::True.to_option(), Some(true));
651        assert_eq!(ConditionResult::False.to_option(), Some(false));
652        assert_eq!(ConditionResult::Unknown.to_option(), None);
653    }
654
655    #[test]
656    fn test_condition_result_from_bool() {
657        assert_eq!(ConditionResult::from(true), ConditionResult::True);
658        assert_eq!(ConditionResult::from(false), ConditionResult::False);
659    }
660
661    #[test]
662    fn test_condition_result_display() {
663        assert_eq!(format!("{}", ConditionResult::True), "True");
664        assert_eq!(format!("{}", ConditionResult::False), "False");
665        assert_eq!(format!("{}", ConditionResult::Unknown), "Unknown");
666    }
667
668    #[test]
669    fn test_noop_external_provider() {
670        let provider = NoOpExternalProvider;
671        assert_eq!(
672            provider.evaluate("MessageSplitting"),
673            ConditionResult::Unknown
674        );
675        assert_eq!(provider.evaluate("anything"), ConditionResult::Unknown);
676    }
677}
automapper_validation/eval/evaluator.rs

automapper_validation/eval/
evaluator.rs
