Support boundless and uncertain CQL intervals

- Align interval operators with CQL semantics for boundless and uncertain endpoints
- Update interval operators to follow CQL spec implementation language as closely as possible
- Preserve interval point types and improve arithmetic, precision, and limit handling
- Expand unit, integration, and specification test coverage

Author: cmoesel

.mocharc.json

@@ -1,5 +1,5 @@
 {
   "ignore": ["test/spec-tests/*.js"],
   "extension": ["ts"],
-  "require": "ts-node/register"
+  "require": ["ts-node/register", "./test/should-extensions.ts"]
 }

examples/browser/cql4browsers.js

@@ -1,6 +1,6 @@
 import * as DT from './datatypes/datatypes';
 import { DataProvider, NamedTypeSpecifier, PatientObject, RecordObject } from './types';
-import { ELM_NAMED_TYPE_SPECIFIER } from './util/elmTypes';
+import { ELM_ANY_TYPE, ELM_NAMED_TYPE_SPECIFIER } from './util/elmTypes';
 
 export class Record implements RecordObject {
   json: any;
@@ -27,7 +27,7 @@ export class Record implements RecordObject {
         name: '{https://github.com/cqframework/cql-execution/simple}Record',
         type: ELM_NAMED_TYPE_SPECIFIER
       },
-      { name: '{urn:hl7-org:elm-types:r1}Any', type: ELM_NAMED_TYPE_SPECIFIER }
+      { name: ELM_ANY_TYPE, type: ELM_NAMED_TYPE_SPECIFIER }
     ];
   }
 

src/cql-patient.ts

@@ -12,6 +12,14 @@ import {
   DateTime as LuxonDateTime,
   FixedOffsetZone
 } from 'luxon';
+import {
+  MAX_DATE_VALUE_STRING,
+  MAX_DATETIME_VALUE_STRING,
+  MAX_TIME_VALUE_STRING,
+  MIN_DATE_VALUE_STRING,
+  MIN_DATETIME_VALUE_STRING,
+  MIN_TIME_VALUE_STRING
+} from '../util/limits';
 
 // It's easiest and most performant to organize formats by length of the supported strings.
 // This way we can test strings only against the formats that have a chance of working.
@@ -550,7 +558,7 @@ abstract class AbstractDate {
       case 'millisecond':
         return 999;
       default:
-        throw new Error('Tried to clieling a field that has no cieling value: ' + field);
+        throw new Error('Tried to ceiling a field that has no cieling value: ' + field);
     }
   }
 }
@@ -722,8 +730,10 @@ export class DateTime extends AbstractDate {
     );
   }
 
-  successor() {
-    if (this.millisecond != null) {
+  successor(precision?: string) {
+    if (precision) {
+      return this.add(1, precision);
+    } else if (this.millisecond != null) {
       return this.add(1, DateTime.Unit.MILLISECOND);
     } else if (this.second != null) {
       return this.add(1, DateTime.Unit.SECOND);
@@ -740,8 +750,10 @@ export class DateTime extends AbstractDate {
     }
   }
 
-  predecessor() {
-    if (this.millisecond != null) {
+  predecessor(precision?: string) {
+    if (precision) {
+      return this.add(-1, precision);
+    } else if (this.millisecond != null) {
       return this.add(-1, DateTime.Unit.MILLISECOND);
     } else if (this.second != null) {
       return this.add(-1, DateTime.Unit.SECOND);
@@ -1254,13 +1266,12 @@ export class Date extends AbstractDate {
 
 // Require MIN/MAX here because math.js requires this file, and when we make this file require
 // math.js before it exports DateTime and Date, it errors due to the circular dependency...
-// const { MAX_DATETIME_VALUE, MIN_DATETIME_VALUE } = require('../util/math');
-export const MIN_DATETIME_VALUE = DateTime.parse('0001-01-01T00:00:00.000');
-export const MAX_DATETIME_VALUE = DateTime.parse('9999-12-31T23:59:59.999');
-export const MIN_DATE_VALUE = Date.parse('0001-01-01');
-export const MAX_DATE_VALUE = Date.parse('9999-12-31');
-export const MIN_TIME_VALUE = DateTime.parse('0000-01-01T00:00:00.000')?.getTime();
-export const MAX_TIME_VALUE = DateTime.parse('0000-01-01T23:59:59.999')?.getTime();
+export const MIN_DATETIME_VALUE = DateTime.parse(MIN_DATETIME_VALUE_STRING);
+export const MAX_DATETIME_VALUE = DateTime.parse(MAX_DATETIME_VALUE_STRING);
+export const MIN_DATE_VALUE = Date.parse(MIN_DATE_VALUE_STRING);
+export const MAX_DATE_VALUE = Date.parse(MAX_DATE_VALUE_STRING);
+export const MIN_TIME_VALUE = DateTime.parse(MIN_TIME_VALUE_STRING)?.getTime();
+export const MAX_TIME_VALUE = DateTime.parse(MAX_TIME_VALUE_STRING)?.getTime();
 
 const DATETIME_PRECISION_VALUE_MAP = (() => {
   const dtpvMap = new Map();