1 files changed, 103 insertions, 0 deletions
diff --git a/spec/frontend/diffs/components/inline_diff_table_row_spec.js b/spec/frontend/diffs/components/inline_diff_table_row_spec.js
new file mode 100644
index 00000000000..66349727b11
--- /dev/null
+++ b/spec/frontend/diffs/components/inline_diff_table_row_spec.js
@@ -0,0 +1,103 @@
+import Vue from 'vue';
+import { createComponentWithStore } from 'helpers/vue_mount_component_helper';
+import { createStore } from '~/mr_notes/stores';
+import InlineDiffTableRow from '~/diffs/components/inline_diff_table_row.vue';
+import diffFileMockData from '../mock_data/diff_file';
+
+describe('InlineDiffTableRow', () => {
+  let vm;
+  const thisLine = diffFileMockData.highlighted_diff_lines[0];
+
+  beforeEach(() => {
+    vm = createComponentWithStore(Vue.extend(InlineDiffTableRow), createStore(), {
+      line: thisLine,
+      fileHash: diffFileMockData.file_hash,
+      filePath: diffFileMockData.file_path,
+      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.$el.querySelector('.line_content').classList).toContain('hll');
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+
+  describe('sets coverage title and class', () => {
+    it('for lines with coverage', done => {
+      vm.$nextTick()
+        .then(() => {
+          const name = diffFileMockData.file_path;
+          const line = thisLine.new_line;
+
+          vm.$store.state.diffs.coverageFiles = { files: { [name]: { [line]: 5 } } };
+
+          return vm.$nextTick();
+        })
+        .then(() => {
+          const coverage = vm.$el.querySelector('.line-coverage');
+
+          expect(coverage.title).toContain('Test coverage: 5 hits');
+          expect(coverage.classList).toContain('coverage');
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+
+    it('for lines without coverage', done => {
+      vm.$nextTick()
+        .then(() => {
+          const name = diffFileMockData.file_path;
+          const line = thisLine.new_line;
+
+          vm.$store.state.diffs.coverageFiles = { files: { [name]: { [line]: 0 } } };
+
+          return vm.$nextTick();
+        })
+        .then(() => {
+          const coverage = vm.$el.querySelector('.line-coverage');
+
+          expect(coverage.title).toContain('No test coverage');
+          expect(coverage.classList).toContain('no-coverage');
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+
+    it('for unknown lines', done => {
+      vm.$nextTick()
+        .then(() => {
+          vm.$store.state.diffs.coverageFiles = {};
+
+          return vm.$nextTick();
+        })
+        .then(() => {
+          const coverage = vm.$el.querySelector('.line-coverage');
+
+          expect(coverage.title).not.toContain('Coverage');
+          expect(coverage.classList).not.toContain('coverage');
+          expect(coverage.classList).not.toContain('no-coverage');
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+  });
+});