Improve addTermDefinition method to handle edge cases

lib/rocrate.js

@@ -356,8 +356,18 @@ class ROCrate {
     }
   }
 
+  /**
+   * Add the term and its definition to the first context definition (a map) found from the `@context` entries.
+   * If no existing context definition found, a new one will be created.
+   * @param {string} term 
+   * @param {string|object} definition 
+   */
   addTermDefinition(term, definition) {
     var context = Array.from(this.__context).find(c => typeof c === 'object');
+    if (!context) {
+      context = {};
+      this.__context.add(context);
+    }
     context[term] = definition;
     const id = typeof definition === 'string' ? definition : definition["@id"] || term;
     this.__contextTermIndex.set(term, definition);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ro-crate",
-  "version": "3.3.7",
+  "version": "3.3.8",
   "description": "Research Object Crate (RO-Crate) utilities for making and consuming crates",
   "main": "index.js",
   "scripts": {

test/rocrate.new.spec.js

@@ -687,7 +687,15 @@ describe("addTermDefinition", function () {
     assert.ok(!crate.getDefinition('Geometry'));
     crate.addTermDefinition('Geometry', 'http://www.opengis.net/ont/geosparql#Geometry');
     assert.ok(crate.getDefinition('Geometry'));
-
+  });
+  it("can add a new term to new context", async function () {
+    const crate = new ROCrate({'@context': 'http://example.com/test'}, {array: true});
+    //await crate.resolveContext();
+    assert.ok(!crate.getDefinition('Geometry'));
+    crate.addTermDefinition('Geometry', 'http://www.opengis.net/ont/geosparql#Geometry');
+    assert.equal(crate.getDefinition('Geometry')['@id'], 'http://www.opengis.net/ont/geosparql#Geometry');
+    assert.equal(crate.getTerm('http://www.opengis.net/ont/geosparql#Geometry'), 'Geometry');
+    assert.equal(crate.context.length, 2);
   });
 });
 describe("getTerm", function () {