Immutable.js expects hashCode to be a function.

Author: RubenVerborgh

src/N3DataFactory.js

@@ -35,12 +35,6 @@ export class Term {
     return this.id;
   }
 
-  // ### Implement hashCode for Immutable.js, since we implement `equals`
-  // https://immutable-js.com/docs/v4.0.0/ValueObject/#hashCode()
-  get hashCode() {
-    return 0;
-  }
-
   // ### Returns whether this object represents the same term as the other
   equals(other) {
     // If both terms were created by this library,
@@ -52,6 +46,12 @@ export class Term {
                       this.value    === other.value;
   }
 
+  // ### Implement hashCode for Immutable.js, since we implement `equals`
+  // https://immutable-js.com/docs/v4.0.0/ValueObject/#hashCode()
+  hashCode() {
+    return 0;
+  }
+
   // ### Returns a plain object representation of this term
   toJSON() {
     return {

test/Term-test.js

@@ -28,7 +28,7 @@ describe('Term', () => {
 
   describe('A Term instance', () => {
     it('has an integer hashCode', () => {
-      new Term().should.have.property('hashCode', 0);
+      new Term().hashCode().should.equal(0);
     });
   });