Add test for getting selected text

tests/src/ace.spec.js

@@ -240,17 +240,23 @@ describe('Ace Component', () => {
       expect(onFocusCallback.callCount).to.equal(1);
     });
 
-    it('should call the onSelectionChange method callback', () => {
-      const onSelectionChangeCallback = sinon.spy();
-      const wrapper = mount(<AceEditor onSelectionChange={onSelectionChangeCallback}/>, mountOptions);
-
-      // Check is not previously called
-      expect(onSelectionChangeCallback.callCount).to.equal(0);
-
-      // Trigger the focus event
+    it('should call the onSelectionChange method callback', (done) => {
+      let onSelectionChange = function(){}
+      const value = `
+        function main(value) {
+          console.log('hi james')
+          return value;
+        }
+      `;
+      const wrapper = mount(<AceEditor value={value} />, mountOptions);
+
+      onSelectionChange = function(selection) {
+        const content = wrapper.instance().editor.session.getTextRange(selection.getRange());
+        expect(content).to.equal(value)
+        done()
+      }
+      wrapper.setProps({onSelectionChange})
       wrapper.instance().editor.getSession().selection.selectAll()
-
-      expect(onSelectionChangeCallback.callCount).to.equal(1);
     });
 
     it('should call the onBlur method callback', () => {