1 files changed, 42 insertions, 0 deletions
diff --git a/spec/javascripts/diffs/components/inline_diff_table_row_spec.js b/spec/javascripts/diffs/components/inline_diff_table_row_spec.js
new file mode 100644
index 00000000000..97926f6625e
--- /dev/null
+++ b/spec/javascripts/diffs/components/inline_diff_table_row_spec.js
@@ -0,0 +1,42 @@
+import Vue from 'vue';
+import store from '~/mr_notes/stores';
+import InlineDiffTableRow from '~/diffs/components/inline_diff_table_row.vue';
+import { createComponentWithStore } from 'spec/helpers/vue_mount_component_helper';
+import diffFileMockData from '../mock_data/diff_file';
+
+describe('InlineDiffTableRow', () => {
+  let vm;
+  const thisLine = diffFileMockData.highlighted_diff_lines[0];
+
+  beforeEach(() => {
+    vm = createComponentWithStore(Vue.extend(InlineDiffTableRow), store, {
+      line: thisLine,
+      fileHash: diffFileMockData.file_hash,
+      contextLinesPath: 'contextLinesPath',
+      isHighlighted: false,
+    }).$mount();
+  });
+
+  it('does not add hll class to line content when line does not match highlighted row', done => {
+    vm.$nextTick()
+      .then(() => {
+        expect(vm.$el.querySelector('.line_content').classList).not.toContain('hll');
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+
+  it('adds hll class to lineContent when line is the highlighted row', done => {
+    vm.$nextTick()
+      .then(() => {
+        vm.$store.state.diffs.highlightedRow = thisLine.line_code;
+
+        return vm.$nextTick();
+      })
+      .then(() => {
+        expect(vm.$el.querySelector('.line_content').classList).toContain('hll');
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+});