Sort @type when looking for scoped contexts.

Adapted from:
ruby-rdf/json-ld@3293841

Author: davidlehn

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### Fixed
 - Use rdf-canonize to compare n-quads test results.
 - Multiple graph tests.
+- Sort `@type` when looking for scoped contexts.
 
 ### Changed
 - Use JSON-LD WG tests.

lib/compact.js

@@ -145,7 +145,10 @@ api.compact = ({
     // apply any context defined on an alias of @type
     // if key is @type and any compacted value is a term having a local
     // context, overlay that context
-    const types = element['@type'] || [];
+    let types = element['@type'] || [];
+    if(types.length > 1) {
+      types = Array.from(types).sort();
+    }
     for(const type of types) {
       const compactedType = api.compactIri(
         {activeCtx, iri: type, relativeTo: {vocab: true}});

lib/expand.js

@@ -157,7 +157,7 @@ api.expand = ({
     const expandedProperty = _expandIri(activeCtx, key, {vocab: true});
     if(expandedProperty === '@type') {
       // set scopped contexts from @type
-      const types = [].concat(element[key]);
+      const types = [].concat(element[key]).sort();
       for(const type of types) {
         const ctx = _getContextValue(activeCtx, type, '@context');
         if(ctx) {

tests/test-common.js

@@ -44,8 +44,6 @@ const TEST_TYPES = {
         /^#tli05/,
         // terms
         /^#tp001/,
-        // scoped context on type
-        /^#tc012/,
         // rel iri
         /^#t0095/
       ]
@@ -76,8 +74,6 @@ const TEST_TYPES = {
         // mode
         /^#tp001/,
         /^#tp002/,
-        // scoped context on type
-        /^#tc011/,
         // rel iri
         /^#t0092/,
         // remote