add tags.spec.js file

test/reducers/tags.spec.js

@@ -0,0 +1,133 @@
+import deepFreeze from 'deep-freeze';
+import tags from '../../app/assets/javascripts/reducers/tags';
+import {
+  RECEIVE_TAGS,
+  RECEIVE_ALL_TAGS,
+  ADD_TAG,
+  REMOVE_TAG
+} from '../../app/assets/javascripts/constants';
+
+
+describe('tags', () => {
+  it('should return the initial state', () => {
+    const initialState = {
+      tags: [],
+      allTags: []
+    };
+    deepFreeze(initialState);
+
+    const result = tags(undefined, {});
+    expect(result).toEqual(initialState);
+  });
+
+  it('should handle ADD_TAG action', () => {
+    const prevState = {
+      tags: ['existingTag'],
+      allTags: []
+    };
+    deepFreeze(prevState);
+
+    const action = {
+      type: ADD_TAG,
+      data: {
+        course: {
+          tags: ['existingTag', 'newTag']
+        }
+      }
+    };
+
+    const result = tags(prevState, action);
+
+    expect(result).toEqual({
+      tags: ['existingTag', 'newTag'],
+      allTags: []
+    });
+  });
+  it('should handle REMOVE_TAG action', () => {
+    const prevState = {
+      tags: ['existingTag', 'tagToRemove'],
+      allTags: []
+    };
+    deepFreeze(prevState);
+
+    const action = {
+      type: REMOVE_TAG,
+      data: {
+        course: {
+          tags: ['tagToRemove']
+        }
+      }
+    };
+
+    const result = tags(prevState, action);
+
+    expect(result).toEqual({
+      tags: ['tagToRemove'], // Assuming your reducer directly replaces tags with the provided tags
+      allTags: []
+    });
+  });
+
+
+
+  it('should handle RECEIVE_TAGS action', () => {
+    const prevState = {
+      tags: [],
+      allTags: []
+    };
+    deepFreeze(prevState);
+
+    const action = {
+      type: RECEIVE_TAGS,
+      data: {
+        course: {
+          tags: ['tag1', 'tag2']
+        }
+      }
+    };
+
+    const result = tags(prevState, action);
+
+    expect(result).toEqual({
+      tags: ['tag1', 'tag2'],
+      allTags: []
+    });
+  });
+
+  it('should handle RECEIVE_ALL_TAGS action', () => {
+    const prevState = {
+      tags: [],
+      allTags: ['existingTag']
+    };
+    deepFreeze(prevState);
+
+    const action = {
+      type: RECEIVE_ALL_TAGS,
+      data: {
+        values: ['tag1', 'tag2']
+      }
+    };
+
+    const result = tags(prevState, action);
+
+    expect(result).toEqual({
+      tags: [],
+      allTags: ['tag1', 'tag2']
+    });
+  });
+
+  it('should return the current state for unknown action types', () => {
+    const prevState = {
+      tags: ['existingTag'],
+      allTags: []
+    };
+    deepFreeze(prevState);
+
+    const action = {
+      type: 'UNKNOWN_ACTION_TYPE'
+    };
+
+    const result = tags(prevState, action);
+
+    expect(result).toEqual(prevState);
+  });
+});