Replace app state with Custom Hooks

14 files changed, 401 insertions, 284 deletions

diff --git a/src/console/actions/console.ts b/src/console/actions/console.ts
deleted file mode 100644
index 2338067..0000000
--- a/src/console/actions/console.ts
+++ /dev/null
@@ -1,118 +0,0 @@
-import * as messages from "../../shared/messages";
-
-export const CONSOLE_SHOW_COMMAND = "console.show.command";
-export const CONSOLE_SHOW_ERROR = "console.show.error";
-export const CONSOLE_SHOW_INFO = "console.show.info";
-export const CONSOLE_HIDE_COMMAND = "console.hide.command";
-export const CONSOLE_SHOW_FIND = "console.show.find";
-export const CONSOLE_HIDE = "console.hide";
-
-export interface HideAction {
-  type: typeof CONSOLE_HIDE;
-}
-
-export interface ShowCommand {
-  type: typeof CONSOLE_SHOW_COMMAND;
-  text: string;
-}
-
-export interface ShowFindAction {
-  type: typeof CONSOLE_SHOW_FIND;
-}
-
-export interface ShowErrorAction {
-  type: typeof CONSOLE_SHOW_ERROR;
-  text: string;
-}
-
-export interface ShowInfoAction {
-  type: typeof CONSOLE_SHOW_INFO;
-  text: string;
-}
-
-export interface HideCommandAction {
-  type: typeof CONSOLE_HIDE_COMMAND;
-}
-
-export type ConsoleAction =
-  | HideAction
-  | ShowCommand
-  | ShowFindAction
-  | ShowErrorAction
-  | ShowInfoAction
-  | HideCommandAction;
-
-const hide = (): ConsoleAction => {
-  return {
-    type: CONSOLE_HIDE,
-  };
-};
-
-const showCommand = (text: string): ShowCommand => {
-  return {
-    type: CONSOLE_SHOW_COMMAND,
-    text,
-  };
-};
-
-const showFind = (): ShowFindAction => {
-  return {
-    type: CONSOLE_SHOW_FIND,
-  };
-};
-
-const showError = (text: string): ShowErrorAction => {
-  return {
-    type: CONSOLE_SHOW_ERROR,
-    text: text,
-  };
-};
-
-const showInfo = (text: string): ShowInfoAction => {
-  return {
-    type: CONSOLE_SHOW_INFO,
-    text: text,
-  };
-};
-
-const hideCommand = (): HideCommandAction => {
-  window.top.postMessage(
-    JSON.stringify({
-      type: messages.CONSOLE_UNFOCUS,
-    }),
-    "*"
-  );
-  return {
-    type: CONSOLE_HIDE_COMMAND,
-  };
-};
-
-const enterCommand = async (text: string): Promise<HideCommandAction> => {
-  await browser.runtime.sendMessage({
-    type: messages.CONSOLE_ENTER_COMMAND,
-    text,
-  });
-  return hideCommand();
-};
-
-const enterFind = (text?: string): HideCommandAction => {
-  window.top.postMessage(
-    JSON.stringify({
-      type: messages.CONSOLE_ENTER_FIND,
-      text,
-    }),
-    "*"
-  );
-  return hideCommand();
-};
-
-export {
-  hide,
-  showCommand,
-  showFind,
-  showError,
-  showInfo,
-  hideCommand,
-  enterCommand,
-  enterFind,
-};
diff --git a/src/console/app/actions.ts b/src/console/app/actions.ts
new file mode 100644
index 0000000..5538ae5
--- /dev/null
+++ b/src/console/app/actions.ts
@@ -0,0 +1,82 @@
+export const SHOW_COMMAND = "show.command";
+export const SHOW_ERROR = "show.error";
+export const SHOW_INFO = "show.info";
+export const HIDE_COMMAND = "hide.command";
+export const SHOW_FIND = "show.find";
+export const HIDE = "hide";
+
+export interface HideAction {
+  type: typeof HIDE;
+}
+
+export interface ShowCommand {
+  type: typeof SHOW_COMMAND;
+  text: string;
+}
+
+export interface ShowFindAction {
+  type: typeof SHOW_FIND;
+}
+
+export interface ShowErrorAction {
+  type: typeof SHOW_ERROR;
+  text: string;
+}
+
+export interface ShowInfoAction {
+  type: typeof SHOW_INFO;
+  text: string;
+}
+
+export interface HideCommandAction {
+  type: typeof HIDE_COMMAND;
+}
+
+export type AppAction =
+  | HideAction
+  | ShowCommand
+  | ShowFindAction
+  | ShowErrorAction
+  | ShowInfoAction
+  | HideCommandAction;
+
+const hide = (): HideAction => {
+  return {
+    type: HIDE,
+  };
+};
+
+const showCommand = (text: string): ShowCommand => {
+  return {
+    type: SHOW_COMMAND,
+    text,
+  };
+};
+
+const showFind = (): ShowFindAction => {
+  return {
+    type: SHOW_FIND,
+  };
+};
+
+const showError = (text: string): ShowErrorAction => {
+  return {
+    type: SHOW_ERROR,
+    text: text,
+  };
+};
+
+const showInfo = (text: string): ShowInfoAction => {
+  return {
+    type: SHOW_INFO,
+    text: text,
+  };
+};
+
+const hideCommand = (): HideCommandAction => {
+  return {
+    type: HIDE_COMMAND,
+  };
+};
+
+export { hide, showCommand, showFind, showError, showInfo, hideCommand };
diff --git a/src/console/app/contexts.ts b/src/console/app/contexts.ts
new file mode 100644
index 0000000..7e4f323
--- /dev/null
+++ b/src/console/app/contexts.ts
@@ -0,0 +1,9 @@
+import React from "react";
+import { State, defaultState } from "./recuer";
+import { AppAction } from "./actions";
+
+export const AppStateContext = React.createContext<State>(defaultState);
+
+export const AppDispatchContext = React.createContext<
+  (action: AppAction) => void
+>(() => {});
diff --git a/src/console/app/hooks.ts b/src/console/app/hooks.ts
new file mode 100644
index 0000000..eefdea3
--- /dev/null
+++ b/src/console/app/hooks.ts
@@ -0,0 +1,115 @@
+import React from "react";
+import * as actions from "./actions";
+import { AppDispatchContext, AppStateContext } from "./contexts";
+import * as messages from "../../shared/messages";
+
+export const useHide = () => {
+  const dispatch = React.useContext(AppDispatchContext);
+  const hide = React.useCallback(() => {
+    window.top.postMessage(
+      JSON.stringify({
+        type: messages.CONSOLE_UNFOCUS,
+      }),
+      "*"
+    );
+    dispatch(actions.hide());
+  }, [dispatch]);
+
+  return hide;
+};
+
+export const useCommandMode = () => {
+  const state = React.useContext(AppStateContext);
+  const dispatch = React.useContext(AppDispatchContext);
+
+  const show = React.useCallback(
+    (initialInputValue: string) => {
+      dispatch(actions.showCommand(initialInputValue));
+    },
+    [dispatch]
+  );
+
+  return {
+    visible: state.mode === "command",
+    initialInputValue: state.consoleText,
+    show,
+  };
+};
+
+export const useFindMode = () => {
+  const state = React.useContext(AppStateContext);
+  const dispatch = React.useContext(AppDispatchContext);
+
+  const show = React.useCallback(() => {
+    dispatch(actions.showFind());
+  }, [dispatch]);
+
+  return {
+    visible: state.mode === "find",
+    show,
+  };
+};
+
+export const useInfoMessage = () => {
+  const state = React.useContext(AppStateContext);
+  const dispatch = React.useContext(AppDispatchContext);
+
+  const show = React.useCallback(
+    (message: string) => {
+      dispatch(actions.showInfo(message));
+    },
+    [dispatch]
+  );
+
+  return {
+    visible: state.mode === "info",
+    message: state.mode === "info" ? state.messageText : "",
+    show,
+  };
+};
+
+export const useErrorMessage = () => {
+  const state = React.useContext(AppStateContext);
+  const dispatch = React.useContext(AppDispatchContext);
+
+  const show = React.useCallback(
+    (message: string) => {
+      dispatch(actions.showError(message));
+    },
+    [dispatch]
+  );
+
+  return {
+    visible: state.mode === "error",
+    message: state.mode === "error" ? state.messageText : "",
+    show,
+  };
+};
+
+export const getInitialInputValue = () => {
+  const state = React.useContext(AppStateContext);
+  return state.consoleText;
+};
+
+export const useExecCommand = () => {
+  const execCommand = React.useCallback((text: string) => {
+    browser.runtime.sendMessage({
+      type: messages.CONSOLE_ENTER_COMMAND,
+      text,
+    });
+  }, []);
+  return execCommand;
+};
+
+export const useExecFind = () => {
+  const execFind = React.useCallback((text?: string) => {
+    window.top.postMessage(
+      JSON.stringify({
+        type: messages.CONSOLE_ENTER_FIND,
+        text,
+      }),
+      "*"
+    );
+  }, []);
+  return execFind;
+};
diff --git a/src/console/app/provider.tsx b/src/console/app/provider.tsx
new file mode 100644
index 0000000..397f165
--- /dev/null
+++ b/src/console/app/provider.tsx
@@ -0,0 +1,14 @@
+import React from "react";
+import reducer, { defaultState } from "./recuer";
+import { AppDispatchContext, AppStateContext } from "./contexts";
+
+export const AppProvider: React.FC = ({ children }) => {
+  const [state, dispatch] = React.useReducer(reducer, defaultState);
+  return (
+    <AppStateContext.Provider value={state}>
+      <AppDispatchContext.Provider value={dispatch}>
+        {children}
+      </AppDispatchContext.Provider>
+    </AppStateContext.Provider>
+  );
+};
diff --git a/src/console/reducers/console.ts b/src/console/app/recuer.ts
index babad69..e3043ee 100644
--- a/src/console/reducers/console.ts
+++ b/src/console/app/recuer.ts
@@ -1,12 +1,12 @@
 import {
-  CONSOLE_HIDE,
-  CONSOLE_HIDE_COMMAND,
-  CONSOLE_SHOW_COMMAND,
-  CONSOLE_SHOW_ERROR,
-  CONSOLE_SHOW_FIND,
-  CONSOLE_SHOW_INFO,
-  ConsoleAction,
-} from "../actions/console";
+  HIDE,
+  HIDE_COMMAND,
+  SHOW_COMMAND,
+  SHOW_ERROR,
+  SHOW_FIND,
+  SHOW_INFO,
+  AppAction,
+} from "./actions";
 
 export interface State {
   mode: string;
@@ -23,24 +23,24 @@ export const defaultState = {
 // eslint-disable-next-line max-lines-per-function
 export default function reducer(
   state: State = defaultState,
-  action: ConsoleAction
+  action: AppAction
 ): State {
   switch (action.type) {
-    case CONSOLE_HIDE:
+    case HIDE:
       return { ...state, mode: "" };
-    case CONSOLE_SHOW_COMMAND:
+    case SHOW_COMMAND:
       return {
         ...state,
         mode: "command",
         consoleText: action.text,
       };
-    case CONSOLE_SHOW_FIND:
+    case SHOW_FIND:
       return { ...state, mode: "find", consoleText: "" };
-    case CONSOLE_SHOW_ERROR:
+    case SHOW_ERROR:
       return { ...state, mode: "error", messageText: action.text };
-    case CONSOLE_SHOW_INFO:
+    case SHOW_INFO:
       return { ...state, mode: "info", messageText: action.text };
-    case CONSOLE_HIDE_COMMAND:
+    case HIDE_COMMAND:
       return {
         ...state,
         mode:
diff --git a/src/console/components/AppContext.ts b/src/console/components/AppContext.ts
deleted file mode 100644
index a930e14..0000000
--- a/src/console/components/AppContext.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import React from "react";
-import { State, defaultState } from "../reducers/console";
-import { ConsoleAction } from "../actions/console";
-
-const AppContext = React.createContext<{
-  state: State;
-  dispatch: React.Dispatch<Promise<ConsoleAction> | ConsoleAction>;
-}>({
-  state: defaultState,
-  dispatch: () => null,
-});
-
-export default AppContext;
diff --git a/src/console/components/CommandPrompt.tsx b/src/console/components/CommandPrompt.tsx
index 24f46ae..1b6281b 100644
--- a/src/console/components/CommandPrompt.tsx
+++ b/src/console/components/CommandPrompt.tsx
@@ -1,12 +1,11 @@
 import React from "react";
-import * as consoleActions from "../actions/console";
-import AppContext from "./AppContext";
 import Completion from "./console/Completion";
 import Input from "./console//Input";
 import styled from "styled-components";
 import { useCompletions, useSelectCompletion } from "../completion/hooks";
 import useAutoResize from "../hooks/useAutoResize";
 import { CompletionProvider } from "../completion/provider";
+import { useExecCommand, useHide } from "../app/hooks";
 
 const COMPLETION_MAX_ITEMS = 33;
 
@@ -19,7 +18,7 @@ interface Props {
 }
 
 const CommandPromptInner: React.FC<Props> = ({ initialInputValue }) => {
-  const { dispatch } = React.useContext(AppContext);
+  const hide = useHide();
   const [inputValue, setInputValue] = React.useState(initialInputValue);
   const { completions, updateCompletions } = useCompletions();
   const {
@@ -28,11 +27,12 @@ const CommandPromptInner: React.FC<Props> = ({ initialInputValue }) => {
     selectNext,
     selectPrev,
   } = useSelectCompletion();
+  const execCommand = useExecCommand();
 
   useAutoResize();
 
   const onBlur = () => {
-    dispatch(consoleActions.hideCommand());
+    hide();
   };
 
   const isCancelKey = React.useCallback(
@@ -63,10 +63,11 @@ const CommandPromptInner: React.FC<Props> = ({ initialInputValue }) => {
 
   const onKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
     if (isCancelKey(e)) {
-      dispatch(consoleActions.hideCommand());
+      hide();
     } else if (isEnterKey(e)) {
       const value = (e.target as HTMLInputElement).value;
-      dispatch(consoleActions.enterCommand(value));
+      execCommand(value);
+      hide();
     } else if (isNextKey(e)) {
       selectNext();
     } else if (isPrevKey(e)) {
diff --git a/src/console/components/Console.tsx b/src/console/components/Console.tsx
index c8642c8..db18fa0 100644
--- a/src/console/components/Console.tsx
+++ b/src/console/components/Console.tsx
@@ -3,31 +3,37 @@ import FindPrompt from "./FindPrompt";
 import CommandPrompt from "./CommandPrompt";
 import InfoMessage from "./InfoMessage";
 import ErrorMessage from "./ErrorMessage";
-import AppContext from "./AppContext";
 import { useColorSchemeRefresh } from "../colorscheme/hooks";
+import {
+  useCommandMode,
+  useErrorMessage,
+  useFindMode,
+  useInfoMessage,
+} from "../app/hooks";
 
 const Console: React.FC = () => {
-  const { state } = React.useContext(AppContext);
   const refreshColorScheme = useColorSchemeRefresh();
+  const { visible: visibleCommand, initialInputValue } = useCommandMode();
+  const { visible: visibleFind } = useFindMode();
+  const { visible: visibleInfo, message: infoMessage } = useInfoMessage();
+  const { visible: visibleError, message: errorMessage } = useErrorMessage();
 
   React.useEffect(() => {
-    if (state.mode !== "") {
+    if (visibleCommand || visibleFind || visibleInfo || visibleError) {
       refreshColorScheme();
     }
-  }, [state.mode]);
+  }, [visibleCommand, visibleFind, visibleInfo, visibleError]);
 
-  switch (state.mode) {
-    case "command":
-      return <CommandPrompt initialInputValue={state.consoleText} />;
-    case "find":
-      return <FindPrompt />;
-    case "info":
-      return <InfoMessage>{state.messageText}</InfoMessage>;
-    case "error":
-      return <ErrorMessage>{state.messageText}</ErrorMessage>;
-    default:
-      return null;
+  if (visibleCommand) {
+    return <CommandPrompt initialInputValue={initialInputValue} />;
+  } else if (visibleFind) {
+    return <FindPrompt />;
+  } else if (visibleInfo) {
+    return <InfoMessage>{infoMessage}</InfoMessage>;
+  } else if (visibleError) {
+    return <ErrorMessage>{errorMessage}</ErrorMessage>;
   }
+  return null;
 };
 
 export default Console;
diff --git a/src/console/components/FindPrompt.tsx b/src/console/components/FindPrompt.tsx
index 10fa6c3..c437d16 100644
--- a/src/console/components/FindPrompt.tsx
+++ b/src/console/components/FindPrompt.tsx
@@ -1,20 +1,20 @@
 import React from "react";
-import * as consoleActions from "../../console/actions/console";
-import AppContext from "./AppContext";
 import Input from "./console/Input";
 import styled from "styled-components";
 import useAutoResize from "../hooks/useAutoResize";
+import { useExecFind, useHide } from "../app/hooks";
 
 const ConsoleWrapper = styled.div`
   border-top: 1px solid gray;
 `;
 
 const FindPrompt: React.FC = () => {
-  const { dispatch } = React.useContext(AppContext);
   const [inputValue, setInputValue] = React.useState("");
+  const hide = useHide();
+  const execFind = useExecFind();
 
   const onBlur = () => {
-    dispatch(consoleActions.hideCommand());
+    hide();
   };
 
   useAutoResize();
@@ -24,13 +24,13 @@ const FindPrompt: React.FC = () => {
     e.preventDefault();
 
     const value = (e.target as HTMLInputElement).value;
-    dispatch(consoleActions.enterFind(value === "" ? undefined : value));
+    execFind(value === "" ? undefined : value);
   };
 
   const onKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
     switch (e.key) {
       case "Escape":
-        dispatch(consoleActions.hideCommand());
+        hide();
         break;
       case "Enter":
         doEnter(e);
diff --git a/src/console/index.tsx b/src/console/index.tsx
index 71f2a27..29fa11f 100644
--- a/src/console/index.tsx
+++ b/src/console/index.tsx
@@ -1,42 +1,44 @@
 import * as messages from "../shared/messages";
-import reducers, { defaultState } from "./reducers/console";
-import * as consoleActions from "./actions/console";
 import Console from "./components/Console";
-import AppContext from "./components/AppContext";
 import "./index.css";
 import React from "react";
 import ReactDOM from "react-dom";
 import ColorSchemeProvider from "./colorscheme/providers";
-
-const wrapAsync = <T extends unknown>(
-  dispatch: React.Dispatch<T>
-): React.Dispatch<T | Promise<T>> => {
-  return (action: T | Promise<T>) => {
-    if (action instanceof Promise) {
-      action.then((a) => dispatch(a)).catch(console.error);
-    } else {
-      dispatch(action);
-    }
-  };
-};
+import { AppProvider } from "./app/provider";
+import {
+  useCommandMode,
+  useFindMode,
+  useInfoMessage,
+  useErrorMessage,
+  useHide,
+} from "./app/hooks";
 
 const RootComponent: React.FC = () => {
-  const [state, dispatch] = React.useReducer(reducers, defaultState);
+  const hide = useHide();
+  const { show: showCommand } = useCommandMode();
+  const { show: showFind } = useFindMode();
+  const { show: showError } = useErrorMessage();
+  const { show: showInfo } = useInfoMessage();
 
   React.useEffect(() => {
     const onMessage = async (message: any): Promise<any> => {
       const msg = messages.valueOf(message);
       switch (msg.type) {
         case messages.CONSOLE_SHOW_COMMAND:
-          return dispatch(await consoleActions.showCommand(msg.command));
+          showCommand(msg.command);
+          break;
         case messages.CONSOLE_SHOW_FIND:
-          return dispatch(consoleActions.showFind());
+          showFind();
+          break;
         case messages.CONSOLE_SHOW_ERROR:
-          return dispatch(consoleActions.showError(msg.text));
+          showError(msg.text);
+          break;
         case messages.CONSOLE_SHOW_INFO:
-          return dispatch(consoleActions.showInfo(msg.text));
+          showInfo(msg.text);
+          break;
         case messages.CONSOLE_HIDE:
-          return dispatch(consoleActions.hide());
+          hide();
+          break;
       }
     };
 
@@ -47,16 +49,18 @@ const RootComponent: React.FC = () => {
     port.onMessage.addListener(onMessage);
   }, []);
 
-  return (
-    <AppContext.Provider value={{ state, dispatch: wrapAsync(dispatch) }}>
-      <ColorSchemeProvider>
-        <Console />
-      </ColorSchemeProvider>
-    </AppContext.Provider>
-  );
+  return <Console />;
 };
 
+const App: React.FC = () => (
+  <AppProvider>
+    <ColorSchemeProvider>
+      <RootComponent />
+    </ColorSchemeProvider>
+  </AppProvider>
+);
+
 window.addEventListener("DOMContentLoaded", () => {
   const wrapper = document.getElementById("vimvixen-console");
-  ReactDOM.render(<RootComponent />, wrapper);
+  ReactDOM.render(<App />, wrapper);
 });
diff --git a/test/console/actions/console.test.ts b/test/console/app/actions.test.ts
index 736dd54..2f9dc71 100644
--- a/test/console/actions/console.test.ts
+++ b/test/console/app/actions.test.ts
@@ -1,12 +1,12 @@
-import * as consoleActions from "../../../src/console/actions/console";
+import * as consoleActions from "../../../src/console/app/actions";
 import {
-  CONSOLE_HIDE,
-  CONSOLE_HIDE_COMMAND,
-  CONSOLE_SHOW_COMMAND,
-  CONSOLE_SHOW_ERROR,
-  CONSOLE_SHOW_FIND,
-  CONSOLE_SHOW_INFO,
-} from "../../../src/console/actions/console";
+  HIDE,
+  HIDE_COMMAND,
+  SHOW_COMMAND,
+  SHOW_ERROR,
+  SHOW_FIND,
+  SHOW_INFO,
+} from "../../../src/console/app/actions";
 import { expect } from "chai";
 
 import browserFake from "webextensions-api-fake";
@@ -19,13 +19,13 @@ describe("console actions", () => {
   describe("hide", () => {
     it("create CONSOLE_HIDE action", () => {
       const action = consoleActions.hide();
-      expect(action.type).to.equal(CONSOLE_HIDE);
+      expect(action.type).to.equal(HIDE);
     });
   });
   describe("showCommand", () => {
     it("create CONSOLE_SHOW_COMMAND action", async () => {
       const action = await consoleActions.showCommand("hello");
-      expect(action.type).to.equal(CONSOLE_SHOW_COMMAND);
+      expect(action.type).to.equal(SHOW_COMMAND);
       expect(action.text).to.equal("hello");
     });
   });
@@ -33,14 +33,14 @@ describe("console actions", () => {
   describe("showFind", () => {
     it("create CONSOLE_SHOW_FIND action", () => {
       const action = consoleActions.showFind();
-      expect(action.type).to.equal(CONSOLE_SHOW_FIND);
+      expect(action.type).to.equal(SHOW_FIND);
     });
   });
 
   describe("showError", () => {
     it("create CONSOLE_SHOW_ERROR action", () => {
       const action = consoleActions.showError("an error");
-      expect(action.type).to.equal(CONSOLE_SHOW_ERROR);
+      expect(action.type).to.equal(SHOW_ERROR);
       expect(action.text).to.equal("an error");
     });
   });
@@ -48,7 +48,7 @@ describe("console actions", () => {
   describe("showInfo", () => {
     it("create CONSOLE_SHOW_INFO action", () => {
       const action = consoleActions.showInfo("an info");
-      expect(action.type).to.equal(CONSOLE_SHOW_INFO);
+      expect(action.type).to.equal(SHOW_INFO);
       expect(action.text).to.equal("an info");
     });
   });
@@ -56,7 +56,7 @@ describe("console actions", () => {
   describe("hideCommand", () => {
     it("create CONSOLE_HIDE_COMMAND action", () => {
       const action = consoleActions.hideCommand();
-      expect(action.type).to.equal(CONSOLE_HIDE_COMMAND);
+      expect(action.type).to.equal(HIDE_COMMAND);
     });
   });
 });
diff --git a/test/console/app/reducer.test.ts b/test/console/app/reducer.test.ts
new file mode 100644
index 0000000..4406adc
--- /dev/null
+++ b/test/console/app/reducer.test.ts
@@ -0,0 +1,85 @@
+import { expect } from "chai";
+import reducer, { defaultState, State } from "../../../src/console/app/recuer";
+import {
+  hide,
+  hideCommand,
+  showCommand,
+  showError,
+  showFind,
+  showInfo,
+} from "../../../src/console/app/actions";
+
+describe("app reducer", () => {
+  describe("hide", () => {
+    it("switches to none mode", () => {
+      const initialState: State = {
+        ...defaultState,
+        mode: "info",
+      };
+      const nextState = reducer(initialState, hide());
+
+      expect(nextState.mode).to.be.empty;
+    });
+  });
+
+  describe("showCommand", () => {
+    it("switches to command mode with a message", () => {
+      const nextState = reducer(defaultState, showCommand("open "));
+
+      expect(nextState.mode).equals("command");
+      expect(nextState.consoleText).equals("open ");
+    });
+  });
+
+  describe("showFind", () => {
+    it("switches to find mode with a message", () => {
+      const nextState = reducer(defaultState, showFind());
+
+      expect(nextState.mode).equals("find");
+    });
+  });
+
+  describe("showError", () => {
+    it("switches to error message mode with a message", () => {
+      const nextState = reducer(defaultState, showError("error occurs"));
+
+      expect(nextState.mode).equals("error");
+      expect(nextState.messageText).equals("error occurs");
+    });
+  });
+
+  describe("showInfo", () => {
+    it("switches to info message mode with a message", () => {
+      const nextState = reducer(defaultState, showInfo("what's up"));
+
+      expect(nextState.mode).equals("info");
+      expect(nextState.messageText).equals("what's up");
+    });
+  });
+
+  describe("hideCommand", () => {
+    describe("when command mode", () => {
+      it("switches to none mode", () => {
+        const initialState: State = {
+          ...defaultState,
+          mode: "command",
+        };
+        const nextState = reducer(initialState, hideCommand());
+
+        expect(nextState.mode).to.be.empty;
+      });
+    });
+
+    describe("when info message mode", () => {
+      it("does nothing", () => {
+        const initialState: State = {
+          ...defaultState,
+          mode: "info",
+        };
+        const nextState = reducer(initialState, hideCommand());
+
+        expect(nextState.mode).equals("info");
+      });
+    });
+  });
+});
diff --git a/test/console/reducers/console.test.ts b/test/console/reducers/console.test.ts
deleted file mode 100644
index 390dc66..0000000
--- a/test/console/reducers/console.test.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-import reducer from "../../../src/console/reducers/console";
-import { expect } from "chai";
-import {
-  CONSOLE_HIDE,
-  CONSOLE_HIDE_COMMAND,
-  CONSOLE_SHOW_COMMAND,
-  CONSOLE_SHOW_ERROR,
-  CONSOLE_SHOW_INFO,
-  ConsoleAction,
-} from "../../../src/console/actions/console";
-
-describe("console reducer", () => {
-  it("return the initial state", () => {
-    const state = reducer(undefined, {} as any);
-    expect(state).to.have.property("mode", "");
-    expect(state).to.have.property("messageText", "");
-    expect(state).to.have.property("consoleText", "");
-  });
-
-  it("return next state for CONSOLE_HIDE", () => {
-    const initialState = reducer(undefined, {} as any);
-    const action: ConsoleAction = { type: CONSOLE_HIDE };
-    const state = reducer({ ...initialState, mode: "error" }, action);
-    expect(state).to.have.property("mode", "");
-  });
-
-  it("return next state for CONSOLE_SHOW_COMMAND", () => {
-    const action: ConsoleAction = {
-      type: CONSOLE_SHOW_COMMAND,
-      text: "open ",
-    };
-    const state = reducer(undefined, action);
-    expect(state).to.have.property("mode", "command");
-    expect(state).to.have.property("consoleText", "open ");
-  });
-
-  it("return next state for CONSOLE_SHOW_INFO", () => {
-    const action: ConsoleAction = {
-      type: CONSOLE_SHOW_INFO,
-      text: "an info",
-    };
-    const state = reducer(undefined, action);
-    expect(state).to.have.property("mode", "info");
-    expect(state).to.have.property("messageText", "an info");
-  });
-
-  it("return next state for CONSOLE_SHOW_ERROR", () => {
-    const action: ConsoleAction = {
-      type: CONSOLE_SHOW_ERROR,
-      text: "an error",
-    };
-    const state = reducer(undefined, action);
-    expect(state).to.have.property("mode", "error");
-    expect(state).to.have.property("messageText", "an error");
-  });
-
-  it("return next state for CONSOLE_HIDE_COMMAND", () => {
-    const initialState = reducer(undefined, {} as any);
-    const action: ConsoleAction = {
-      type: CONSOLE_HIDE_COMMAND,
-    };
-    let state = reducer({ ...initialState, mode: "command" }, action);
-    expect(state).to.have.property("mode", "");
-
-    state = reducer({ ...initialState, mode: "error" }, action);
-    expect(state).to.have.property("mode", "error");
-  });
-});