chore: redux transform hooks

src/data/redux/transforms.js

@@ -0,0 +1,13 @@
+import { StrictDict } from 'utils';
+import selectors from 'data/selectors';
+
+export const grades = StrictDict({
+  subsectionGrade: ({ gradeFormat, subsection }) => () => (
+    selectors.grades.subsectionGrade[gradeFormat](subsection)
+  ),
+  roundGrade: selectors.grades.roundGrade,
+});
+
+export default StrictDict({
+  grades,
+});

src/data/redux/transforms.test.js

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+import selectors from 'data/selectors';
+
+import { GradeFormats } from 'data/constants/grades';
+import transforms from './transforms';
+
+jest.mock('data/selectors', () => {
+  const {
+    GradeFormats: { absolute, percent },
+  } = jest.requireActual('data/constants/grades');
+  return {
+    grades: {
+      subsectionGrade: {
+        [absolute]: jest.fn(v => ({ absolute: v })),
+        [percent]: jest.fn(v => ({ percent: v })),
+      },
+      roundGrade: jest.fn(),
+    },
+  };
+});
+
+describe('redux transforms', () => {
+  describe('grades transforms', () => {
+    test('subsectionGrade', () => {
+      const subsection = 'test-subsection';
+      expect(transforms.grades.subsectionGrade({
+        gradeFormat: GradeFormats.absolute,
+        subsection,
+      })()).toEqual(selectors.grades.subsectionGrade.absolute(subsection));
+      expect(transforms.grades.subsectionGrade({
+        gradeFormat: GradeFormats.percent,
+        subsection,
+      })()).toEqual(selectors.grades.subsectionGrade.percent(subsection));
+    });
+    test('roundGrade', () => {
+      expect(transforms.grades.roundGrade).toEqual(selectors.grades.roundGrade);
+    });
+  });
+});