1 files changed, 78 insertions, 0 deletions
diff --git a/spec/frontend/ide/stores/modules/editor/mutations_spec.js b/spec/frontend/ide/stores/modules/editor/mutations_spec.js
new file mode 100644
index 00000000000..e4b330b3174
--- /dev/null
+++ b/spec/frontend/ide/stores/modules/editor/mutations_spec.js
@@ -0,0 +1,78 @@
+import { createDefaultFileEditor } from '~/ide/stores/modules/editor/utils';
+import * as types from '~/ide/stores/modules/editor/mutation_types';
+import mutations from '~/ide/stores/modules/editor/mutations';
+import { createTriggerRenamePayload } from '../../../helpers';
+
+const TEST_PATH = 'test/path.md';
+
+describe('~/ide/stores/modules/editor/mutations', () => {
+  describe(types.UPDATE_FILE_EDITOR, () => {
+    it('with path that does not exist, should initialize with default values', () => {
+      const state = { fileEditors: {} };
+      const data = { fileLanguage: 'markdown' };
+
+      mutations[types.UPDATE_FILE_EDITOR](state, { path: TEST_PATH, data });
+
+      expect(state.fileEditors).toEqual({
+        [TEST_PATH]: {
+          ...createDefaultFileEditor(),
+          ...data,
+        },
+      });
+    });
+
+    it('with existing path, should overwrite values', () => {
+      const state = {
+        fileEditors: {
+          foo: {},
+          [TEST_PATH]: { ...createDefaultFileEditor(), editorRow: 7, editorColumn: 7 },
+        },
+      };
+
+      mutations[types.UPDATE_FILE_EDITOR](state, {
+        path: TEST_PATH,
+        data: { fileLanguage: 'markdown' },
+      });
+
+      expect(state).toEqual({
+        fileEditors: {
+          foo: {},
+          [TEST_PATH]: {
+            ...createDefaultFileEditor(),
+            editorRow: 7,
+            editorColumn: 7,
+            fileLanguage: 'markdown',
+          },
+        },
+      });
+    });
+  });
+
+  describe(types.REMOVE_FILE_EDITOR, () => {
+    it.each`
+      fileEditors                     | path                    | expected
+      ${{}}                           | ${'does/not/exist.txt'} | ${{}}
+      ${{ foo: {}, [TEST_PATH]: {} }} | ${TEST_PATH}            | ${{ foo: {} }}
+    `('removes file $path', ({ fileEditors, path, expected }) => {
+      const state = { fileEditors };
+
+      mutations[types.REMOVE_FILE_EDITOR](state, path);
+
+      expect(state).toEqual({ fileEditors: expected });
+    });
+  });
+
+  describe(types.RENAME_FILE_EDITOR, () => {
+    it.each`
+      fileEditors                   | payload                                                | expected
+      ${{ foo: {} }}                | ${createTriggerRenamePayload('does/not/exist', 'abc')} | ${{ foo: {} }}
+      ${{ foo: { a: 1 }, bar: {} }} | ${createTriggerRenamePayload('foo', 'abc/def')}        | ${{ 'abc/def': { a: 1 }, bar: {} }}
+    `('renames fileEditor at $payload', ({ fileEditors, payload, expected }) => {
+      const state = { fileEditors };
+
+      mutations[types.RENAME_FILE_EDITOR](state, payload);
+
+      expect(state).toEqual({ fileEditors: expected });
+    });
+  });
+});