fml-check 0.1.0

Type checker for the FHIR Mapping Language: element paths, types, variables and group calls
Documentation 
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

//! What the checker reports, against the embedded core definitions.
#![cfg(feature = "fhirschema")]

use fml_check::{CoreDefinitions, Release, check};
use fml_syntax::{LineIndex, parse};

fn diagnostics(source: &str, release: Release) -> String {
    let parse = parse(source);
    assert!(parse.diagnostics().is_empty(), "{:?}", parse.diagnostics());
    let index = LineIndex::new(source);
    check(&parse.tree(), &CoreDefinitions::new(release))
        .iter()
        .map(|d| {
            let at = index.line_col(source, d.range.start());
            format!("{}:{} {}", at.line + 1, at.col + 1, d.message)
        })
        .collect::<Vec<_>>()
        .join("\n")
}

#[test]
fn reports_what_cannot_work() {
    let source = r#"uses "http://hl7.org/fhir/StructureDefinition/Patient" alias P as source
uses "http://hl7.org/fhir/StructureDefinition/Basic" alias B as target
uses "http://hl7.org/fhir/StructureDefinition/NoSuchThing" as source

group Main(source src : P, target tgt : B) {
  src.nmae -> tgt.code;
  src.deceased : string as d -> tgt.subject;
  src.name as n -> tgt.extension as e, e.value = create('Quantity'), e.url = create('DomainResource');
  src.gender as g -> src.gender = g "writesSource";
  src.contact as c -> tgt.extension as e then Contact(c, e) "contact";
  src.birthDate as b -> tgt.created = truncate(b) "arity";
  src.id as i -> tgt.id = copy(missing) "unknownVariable";
  src.link as l then Missing(l) "unknownGroup";
}

group Contact(source src, target tgt) {
  src.relationshp -> tgt.url;
  src.name as n -> tgt.value = create('HumanName') "name";
}
"#;
    insta::assert_snapshot!(diagnostics(source, Release::R5), @r"
    3:6 unknown structure `http://hl7.org/fhir/StructureDefinition/NoSuchThing`
    6:7 `Patient` has no element `nmae`
    7:16 `string` is not a type of `Patient.deceased`; it is boolean, dateTime
    8:85 `DomainResource` is abstract and cannot be created
    9:22 `src` is a source variable; a target writes into a target variable
    11:39 `truncate` takes 2 argument(s), found 1
    12:32 unknown variable `missing`
    13:22 group `Missing` is not declared and nothing is imported
    17:7 `Patient.contact` has no element `relationshp`
    ");
}

#[test]
fn accepts_valid_maps() {
    let source = r#"uses "http://hl7.org/fhir/4.0/StructureDefinition/Bundle" alias BundleR4 as source
uses "http://hl7.org/fhir/5.0/StructureDefinition/Bundle" alias BundleR5 as target
let fallback = 'none';

group Bundle(source src : BundleR4, target tgt : BundleR5) extends Resource <<type+>> {
  src.type -> tgt.type;
  src.entry as s -> tgt.entry as t then {
    s.fullUrl -> t.fullUrl;
    s.resource -> t.resource;
    s.response as rs -> t.response as rt then {
      rs.outcome : OperationOutcome -> rt.outcome "outcome";
      rs.status as v -> rt.status = truncate(v, fallback) "status";
    } "response";
  } "entry";
  src.signature as s -> tgt.signature as t then Signature(s, t) "signature";
}

group Signature(source src, target tgt) {
  src.when -> tgt.when;
  src.who -> tgt.who;
  src.data as d -> tgt.data = d "data";
}

group Resource(source src, target tgt) {
  src.id -> tgt.id;
  src.meta -> tgt.meta;
}

group string(source src : string, target tgt : string) <<type+>> {
  src.value as v -> tgt.value = v "value";
}
"#;
    assert_eq!(diagnostics(source, Release::R5), "");
}

#[test]
fn untyped_groups_are_checked_with_their_call_types() {
    let source = r#"uses "http://hl7.org/fhir/StructureDefinition/Questionnaire" as source
uses "http://hl7.org/fhir/StructureDefinition/Questionnaire" as target

group Main(source src : Questionnaire, target tgt : Questionnaire) {
  src.item as s -> tgt.item as t then Item(s, t) "item";
}

group Item(source src, target tgt) {
  src.linkId -> tgt.linkId;
  src.item as s -> tgt.item as t then Item(s, t) "nested";
  src.answer -> tgt.answer;
}
"#;
    insta::assert_snapshot!(
        diagnostics(source, Release::R4),
        @r"
    11:7 `Questionnaire.item` has no element `answer`
    11:21 `Questionnaire.item` has no element `answer`
    "
    );
}

#[test]
fn checks_element_paths_inside_fhirpath() {
    let source = r#"uses "http://hl7.org/fhir/StructureDefinition/Account" as source
uses "http://hl7.org/fhir/StructureDefinition/Account" as target

group Main(source src : Account, target tgt : Account) {
  src.relatedAccount as ra where (ra.relationship.exists(system = 'x' and code = 'parent')) -> tgt.name = 'a' "wrong";
  src.relatedAccount as ra where (relationship.coding.exists(system = 'x' and code = 'parent')) -> tgt.name = 'b' "right";
  src.coverage as c where (c.coverage.resolve().exists() and $this.priority > 0) -> tgt.name = (c.coverage.display) "deep";
  src.name as n -> tgt.description = (n.lenght().toString()) "functionsAreNotChecked";
  src.status as s where (statuss = 'active') -> tgt.status = s "typo";
}
"#;
    insta::assert_snapshot!(diagnostics(source, Release::R5), @r"
    5:58 `CodeableConcept` has no element `system`
    5:75 `CodeableConcept` has no element `code`
    9:26 `code` has no element `statuss`
    ");
}