1 files changed, 35 insertions, 0 deletions
diff --git a/spec/frontend/api/api_utils_spec.js b/spec/frontend/api/api_utils_spec.js
new file mode 100644
index 00000000000..3fec26f0149
--- /dev/null
+++ b/spec/frontend/api/api_utils_spec.js
@@ -0,0 +1,35 @@
+import * as apiUtils from '~/api/api_utils';
+
+describe('~/api/api_utils.js', () => {
+  describe('buildApiUrl', () => {
+    beforeEach(() => {
+      window.gon = {
+        api_version: 'v7',
+      };
+    });
+
+    it('returns a URL with the correct API version', () => {
+      expect(apiUtils.buildApiUrl('/api/:version/users/:id/status')).toEqual(
+        '/api/v7/users/:id/status',
+      );
+    });
+
+    it('only replaces the first instance of :version in the URL', () => {
+      expect(apiUtils.buildApiUrl('/api/:version/projects/:id/packages/:version')).toEqual(
+        '/api/v7/projects/:id/packages/:version',
+      );
+    });
+
+    describe('when gon includes a relative_url_root property', () => {
+      beforeEach(() => {
+        window.gon.relative_url_root = '/relative/root';
+      });
+
+      it('returns a URL with the correct relative root URL and API version', () => {
+        expect(apiUtils.buildApiUrl('/api/:version/users/:id/status')).toEqual(
+          '/relative/root/api/v7/users/:id/status',
+        );
+      });
+    });
+  });
+});