1 files changed, 85 insertions, 0 deletions
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");
+      });
+    });
+  });
+});