diff --git a/src/core/singletons/tests/text.test.ts b/src/core/singletons/tests/text.test.ts
new file mode 100644
index 000000000..10994b35e
--- /dev/null
+++ b/src/core/singletons/tests/text.test.ts
@@ -0,0 +1,42 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreText } from '@singletons/text';
+
+describe('CoreText singleton', () => {
+
+    it('adds a starting slash if needed', () => {
+        expect(CoreText.addStartingSlash('')).toEqual('/');
+        expect(CoreText.addStartingSlash('foo')).toEqual('/foo');
+        expect(CoreText.addStartingSlash('/foo')).toEqual('/foo');
+    });
+
+    it('remove ending slash if needed', () => {
+        expect(CoreText.removeEndingSlash('/')).toEqual('');
+        expect(CoreText.removeEndingSlash('foo')).toEqual('foo');
+        expect(CoreText.removeEndingSlash('foo/')).toEqual('foo');
+        expect(CoreText.removeEndingSlash('foo//')).toEqual('foo/');
+    });
+
+    it('concatenates paths', () => {
+        expect(CoreText.concatenatePaths('', 'foo/bar')).toEqual('foo/bar');
+        expect(CoreText.concatenatePaths('foo/bar', '')).toEqual('foo/bar');
+        expect(CoreText.concatenatePaths('foo', 'bar')).toEqual('foo/bar');
+        expect(CoreText.concatenatePaths('foo/', 'bar')).toEqual('foo/bar');
+        expect(CoreText.concatenatePaths('foo', '/bar')).toEqual('foo/bar');
+        expect(CoreText.concatenatePaths('foo/', '/bar')).toEqual('foo/bar');
+        expect(CoreText.concatenatePaths('foo/bar', 'baz')).toEqual('foo/bar/baz');
+    });
+
+});