diff --git a/shell/store/__tests__/prefs.test.ts b/shell/store/__tests__/prefs.test.ts
new file mode 100644
index 00000000000..74f47709e3a
--- /dev/null
+++ b/shell/store/__tests__/prefs.test.ts
@@ -0,0 +1,336 @@
+import {
+  state as makeState,
+  getters,
+  mutations,
+  actions,
+  CLUSTER,
+  LAST_VISITED,
+  AFTER_LOGIN_ROUTE,
+  THEME,
+  PREFERS_SCHEME,
+  LOCALE,
+  DEV,
+  PLUGIN_DEVELOPER,
+  DIFF,
+  EXPANDED_GROUPS,
+  GROUP_RESOURCES,
+} from '../prefs';
+
+describe('store: prefs', () => {
+  let s: ReturnType<typeof makeState>;
+
+  beforeEach(() => {
+    s = makeState();
+  });
+
+  describe('getters.get', () => {
+    it('throws for an unknown preference key', () => {
+      expect(() => getters.get(s)('__no-such-key__')).toThrow('Unknown preference: __no-such-key__');
+    });
+
+    it('returns the user-set value (cloned) when present', () => {
+      s.data[THEME] = 'light';
+      expect(getters.get(s)(THEME)).toStrictEqual('light');
+    });
+
+    it('returns the default value (cloned) when no user value is set', () => {
+      expect(getters.get(s)(THEME)).toStrictEqual('auto');
+    });
+
+    it('returns a clone, not the original reference, for object values', () => {
+      const val = { x: 1 };
+
+      s.data[CLUSTER] = val;
+      const result = getters.get(s)(CLUSTER);
+
+      expect(result).toStrictEqual(val);
+      expect(result).not.toBe(val);
+    });
+  });
+
+  describe('getters.defaultValue', () => {
+    it('throws for an unknown preference key', () => {
+      expect(() => getters.defaultValue(s)('__no-such-key__')).toThrow('Unknown preference: __no-such-key__');
+    });
+
+    it('returns the default value defined by create()', () => {
+      expect(getters.defaultValue(s)(THEME)).toStrictEqual('auto');
+    });
+
+    it('returns a clone, not the original reference, for array defaults', () => {
+      const defaultVal = getters.defaultValue(s)(EXPANDED_GROUPS);
+      const secondCall = getters.defaultValue(s)(EXPANDED_GROUPS);
+
+      expect(defaultVal).toStrictEqual(secondCall);
+      expect(defaultVal).not.toBe(secondCall);
+    });
+  });
+
+  describe('getters.options', () => {
+    it('throws for an unknown preference key', () => {
+      expect(() => getters.options(s)('__no-such-key__')).toThrow('Unknown preference: __no-such-key__');
+    });
+
+    it('throws when the preference has no options', () => {
+      expect(() => getters.options(s)(CLUSTER)).toThrow('Preference does not have options: cluster');
+    });
+
+    it('returns a copy of the options array', () => {
+      expect(getters.options(s)(DIFF)).toStrictEqual(['unified', 'split']);
+    });
+
+    it('returns a new array (not the original reference)', () => {
+      const first = getters.options(s)(DIFF);
+      const second = getters.options(s)(DIFF);
+
+      expect(first).not.toBe(second);
+    });
+  });
+
+  describe('getters.theme', () => {
+    const buildGetters = (themeVal: string, pcsVal: string) => ({ get: (key: string) => (key === THEME ? themeVal : pcsVal) });
+
+    it('returns the management setting value when set', () => {
+      const rootGetters = { 'management/byId': () => ({ value: 'light' }) };
+      const result = getters.theme(s, buildGetters('dark', ''), null as any, rootGetters as any);
+
+      expect(result).toStrictEqual('light');
+    });
+
+    it('returns the stored theme directly when not auto or ui- prefixed', () => {
+      const rootGetters = { 'management/byId': () => null };
+      const result = getters.theme(s, buildGetters('dark', ''), null as any, rootGetters as any);
+
+      expect(result).toStrictEqual('dark');
+    });
+
+    it('strips the ui- prefix from the theme value', () => {
+      const rootGetters = { 'management/byId': () => null };
+      const result = getters.theme(s, buildGetters('ui-light', ''), null as any, rootGetters as any);
+
+      expect(result).toStrictEqual('light');
+    });
+
+    it('resolves auto to the pcs preference when pcs is light', () => {
+      const rootGetters = { 'management/byId': () => null };
+      const result = getters.theme(s, buildGetters('auto', 'light'), null as any, rootGetters as any);
+
+      expect(result).toStrictEqual('light');
+    });
+
+    it('resolves auto to the pcs preference when pcs is dark', () => {
+      const rootGetters = { 'management/byId': () => null };
+      const result = getters.theme(s, buildGetters('auto', 'dark'), null as any, rootGetters as any);
+
+      expect(result).toStrictEqual('dark');
+    });
+
+    it('resolves auto to dark when pcs is not light or dark', () => {
+      const rootGetters = { 'management/byId': () => null };
+      const result = getters.theme(s, buildGetters('auto', ''), null as any, rootGetters as any);
+
+      expect(result).toStrictEqual('dark');
+    });
+  });
+
+  describe('getters.afterLoginRoute', () => {
+    const buildGetters = (afterLogin: any, lastVisited = '', cluster = '') => ({
+      get: (key: string) => {
+        if (key === AFTER_LOGIN_ROUTE) {
+          return afterLogin;
+        }
+        if (key === LAST_VISITED) {
+          return lastVisited;
+        }
+        if (key === CLUSTER) {
+          return cluster;
+        }
+
+        return undefined;
+      },
+    });
+
+    it('returns non-string values as-is', () => {
+      const obj = { name: 'custom-route', params: { id: '42' } };
+      const result = getters.afterLoginRoute(s, buildGetters(obj) as any);
+
+      expect(result).toStrictEqual(obj);
+    });
+
+    it('returns home route object when preference is home', () => {
+      const result = getters.afterLoginRoute(s, buildGetters('home') as any);
+
+      expect(result).toStrictEqual({ name: 'home' });
+    });
+
+    it('returns authRedirect when preference is last-visited and authRedirect is set', () => {
+      s.authRedirect = { name: 'c-cluster-explorer', params: { cluster: 'abc' } };
+      const result = getters.afterLoginRoute(s, buildGetters('last-visited') as any);
+
+      expect(result).toStrictEqual({ name: 'c-cluster-explorer', params: { cluster: 'abc' } });
+    });
+
+    it('returns lastVisited pref when last-visited and authRedirect is not set', () => {
+      s.authRedirect = null;
+      const result = getters.afterLoginRoute(
+        s,
+        buildGetters('last-visited', 'some-last-visited') as any
+      );
+
+      expect(result).toStrictEqual('some-last-visited');
+    });
+
+    it('returns cluster explorer route with cluster pref when last-visited and no stored last-visited', () => {
+      s.authRedirect = null;
+      const result = getters.afterLoginRoute(
+        s,
+        buildGetters('last-visited', '', 'local') as any
+      );
+
+      expect(result).toStrictEqual({ name: 'c-cluster-explorer', params: { cluster: 'local' } });
+    });
+
+    it('returns cluster explorer route for a cluster-dashboard string', () => {
+      const result = getters.afterLoginRoute(s, buildGetters('my-cluster-dashboard') as any);
+
+      expect(result).toStrictEqual({ name: 'c-cluster-explorer', params: { cluster: 'my-cluster' } });
+    });
+
+    it('returns named route for any other string preference', () => {
+      const result = getters.afterLoginRoute(s, buildGetters('some-route') as any);
+
+      expect(result).toStrictEqual({ name: 'some-route' });
+    });
+  });
+
+  describe('getters.dev', () => {
+    it('returns the PLUGIN_DEVELOPER preference value', () => {
+      s.data[PLUGIN_DEVELOPER] = true;
+      const localGetters = {
+        get: (key: string) => {
+          if (!(key in s.definitions)) {
+            throw new Error(`Unknown preference: ${ key }`);
+          }
+
+          return s.data[key];
+        },
+      };
+      const result = getters.dev(s, localGetters as any);
+
+      expect(result).toStrictEqual(true);
+    });
+
+    it('falls back to DEV preference when PLUGIN_DEVELOPER getter throws', () => {
+      s.data[DEV] = true;
+      const localGetters = {
+        get: (key: string) => {
+          if (key === PLUGIN_DEVELOPER) {
+            throw new Error('Unknown preference: plugin-developer');
+          }
+
+          return s.data[key];
+        },
+      };
+      const result = getters.dev(s, localGetters as any);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+
+  describe('mutations', () => {
+    describe('load', () => {
+      it('stores a value for the given key', () => {
+        mutations.load(s, { key: THEME, value: 'light' });
+        expect(s.data[THEME]).toStrictEqual('light');
+      });
+    });
+
+    describe('cookiesLoaded', () => {
+      it('sets cookiesLoaded to true', () => {
+        expect(s.cookiesLoaded).toStrictEqual(false);
+        mutations.cookiesLoaded(s);
+        expect(s.cookiesLoaded).toStrictEqual(true);
+      });
+    });
+
+    describe('reset', () => {
+      it('removes non-cookie preference data', () => {
+        s.data[GROUP_RESOURCES] = 'project';
+        mutations.reset(s);
+        expect(s.data[GROUP_RESOURCES]).toBeUndefined();
+      });
+
+      it('preserves data for cookie-backed preferences', () => {
+        s.data[LOCALE] = 'de-de';
+        s.data[PREFERS_SCHEME] = 'light';
+        mutations.reset(s);
+        expect(s.data[LOCALE]).toStrictEqual('de-de');
+        expect(s.data[PREFERS_SCHEME]).toStrictEqual('light');
+      });
+    });
+
+    describe('setDefinition', () => {
+      it('adds a new definition to state.definitions', () => {
+        const testKey = '__prefs-test-setdef__';
+        const definition = {
+          def:              'test-default',
+          asCookie:         false,
+          parseJSON:        false,
+          asUserPreference: true,
+          options:          null,
+          inheritFrom:      null,
+          mangleRead:       null,
+          mangleWrite:      null,
+        };
+
+        mutations.setDefinition(s, { name: testKey, definition });
+        expect(s.definitions[testKey]).toStrictEqual(definition);
+      });
+    });
+
+    describe('setAuthRedirect', () => {
+      it('sets the authRedirect on state', () => {
+        const route = { name: 'c-cluster-explorer', params: { cluster: 'local' } };
+
+        mutations.setAuthRedirect(s, route);
+        expect(s.authRedirect).toStrictEqual(route);
+      });
+    });
+  });
+
+  describe('actions.setLastVisited', () => {
+    let dispatch: jest.Mock;
+    let localGetters: Record<string, any>;
+
+    beforeEach(() => {
+      dispatch = jest.fn();
+      localGetters = { get: (key: string) => s.data[key] ?? s.definitions[key]?.def };
+    });
+
+    it('returns without dispatching when route is falsy', async() => {
+      await actions.setLastVisited({
+        s, dispatch, getters: localGetters
+      } as any, null);
+      expect(dispatch).not.toHaveBeenCalled();
+    });
+
+    it('returns without dispatching when afterLoginRoute pref is not last-visited', async() => {
+      s.data[AFTER_LOGIN_ROUTE] = 'home';
+      await actions.setLastVisited({
+        s, dispatch, getters: localGetters
+      } as any, '/some/path');
+      expect(dispatch).not.toHaveBeenCalled();
+    });
+
+    it('dispatches set with LAST_VISITED when afterLoginRoute pref is last-visited', async() => {
+      s.data[AFTER_LOGIN_ROUTE] = 'last-visited';
+      await actions.setLastVisited({
+        s, dispatch, getters: localGetters
+      } as any, '/some/path');
+      expect(dispatch).toHaveBeenCalledWith('set', {
+        key:   LAST_VISITED,
+        value: '/some/path',
+      });
+    });
+  });
+});