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diff --git a/test/console/reducers/console.test.js b/test/console/reducers/console.test.js
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+++ b/test/console/reducers/console.test.js
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+import { expect } from "chai";
+import actions from 'console/actions';
+import reducer from 'console/reducers';
+
+describe("console reducer", () => {
+  it('return the initial state', () => {
+    let state = reducer(undefined, {});
+    expect(state).to.have.property('errorShown', false);
+    expect(state).to.have.property('errorText', '');
+    expect(state).to.have.property('commandShown', false);
+    expect(state).to.have.property('commandText', '');
+    expect(state).to.have.deep.property('completions', []);
+    expect(state).to.have.property('groupSelection', -1);
+    expect(state).to.have.property('itemSelection', -1);
+  });
+
+  it('return next state for CONSOLE_SHOW_COMMAND', () => {
+    let action = { type: actions.CONSOLE_SHOW_COMMAND, text: 'open ' };
+    let state = reducer({}, action);
+    expect(state).to.have.property('commandShown', true);
+    expect(state).to.have.property('commandText', 'open ');
+    expect(state).to.have.property('errorShown', false);
+  });
+
+  it('return next state for CONSOLE_SHOW_ERROR', () => {
+    let action = { type: actions.CONSOLE_SHOW_ERROR, text: 'an error' };
+    let state = reducer({}, action);
+    expect(state).to.have.property('errorShown', true);
+    expect(state).to.have.property('errorText', 'an error');
+    expect(state).to.have.property('commandShown', false);
+  });
+
+  it('return next state for CONSOLE_HIDE', () => {
+    let action = { type: actions.CONSOLE_HIDE };
+    let state = reducer({}, action);
+    expect(state).to.have.property('errorShown', false);
+    expect(state).to.have.property('commandShown', false);
+  });
+
+  it ('return next state for CONSOLE_SET_COMPLETIONS', () => {
+    let state = {
+      groupSelection: 0,
+      itemSelection: 0,
+      completions: [],
+    }
+    let action = {
+      type: actions.CONSOLE_SET_COMPLETIONS,
+      completions: [{
+        name: 'Apple',
+        items: [1, 2, 3]
+      }, {
+        name: 'Banana',
+        items: [4, 5, 6]
+      }]
+    }
+    state = reducer(state, action);
+    expect(state).to.have.property('completions', action.completions);
+    expect(state).to.have.property('groupSelection', -1);
+    expect(state).to.have.property('itemSelection', -1);
+  });
+
+  it ('return next state for CONSOLE_COMPLETION_NEXT', () => {
+    let action = { type: actions.CONSOLE_COMPLETION_NEXT };
+    let state = {
+      groupSelection: -1,
+      itemSelection: -1,
+      completions: [{
+        name: 'Apple',
+        items: [1, 2]
+      }, {
+        name: 'Banana',
+        items: [3]
+      }]
+    };
+
+    state = reducer(state, action);
+    expect(state).to.have.property('groupSelection', 0);
+    expect(state).to.have.property('itemSelection', 0);
+
+    state = reducer(state, action);
+    expect(state).to.have.property('groupSelection', 0);
+    expect(state).to.have.property('itemSelection', 1);
+
+    state = reducer(state, action);
+    state = reducer(state, action);
+    expect(state).to.have.property('groupSelection', -1);
+    expect(state).to.have.property('itemSelection', -1);
+  });
+
+  it ('return next state for CONSOLE_COMPLETION_PREV', () => {
+    let action = { type: actions.CONSOLE_COMPLETION_PREV };
+    let state = {
+      groupSelection: -1,
+      itemSelection: -1,
+      completions: [{
+        name: 'Apple',
+        items: [1, 2]
+      }, {
+        name: 'Banana',
+        items: [3]
+      }]
+    };
+
+    state = reducer(state, action);
+    expect(state).to.have.property('groupSelection', 1);
+    expect(state).to.have.property('itemSelection', 0);
+
+    state = reducer(state, action);
+    expect(state).to.have.property('groupSelection', 0);
+    expect(state).to.have.property('itemSelection', 1);
+
+    state = reducer(state, action);
+    state = reducer(state, action);
+    expect(state).to.have.property('groupSelection', -1);
+    expect(state).to.have.property('itemSelection', -1);
+  });
+
+});