From 97da04af998935f67525e499e26c0523528ee182 Mon Sep 17 00:00:00 2001
From: marocchino <marocchino@users.noreply.github.com>
Date: Sat, 23 Nov 2019 10:10:39 +0900
Subject: [PATCH 1/3] chore: wallaby config

---
 wallaby.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 wallaby.js

diff --git a/wallaby.js b/wallaby.js
new file mode 100644
index 0000000..df2c9e1
--- /dev/null
+++ b/wallaby.js
@@ -0,0 +1,15 @@
+module.exports = function(wallaby) {
+  return {
+    files: ["src/**/*.js?(x)", "!src/**/*.spec.ts?(x)"],
+    tests: ["__tests__/**/*.test.ts?(x)"],
+
+    env: {
+      type: "node",
+      runner: "node"
+    },
+
+    testFramework: "jest",
+
+    debug: true
+  };
+};

From fd286f323081a82abd9d2b98ecdd077eee32b148 Mon Sep 17 00:00:00 2001
From: marocchino <marocchino@users.noreply.github.com>
Date: Sat, 23 Nov 2019 10:11:28 +0900
Subject: [PATCH 2/3] refactor: extract api wrapper

---
 src/comment.ts | 21 +++++++++++++++++++++
 src/main.ts    | 32 +++++++++-----------------------
 2 files changed, 30 insertions(+), 23 deletions(-)
 create mode 100644 src/comment.ts

diff --git a/src/comment.ts b/src/comment.ts
new file mode 100644
index 0000000..78504db
--- /dev/null
+++ b/src/comment.ts
@@ -0,0 +1,21 @@
+export async function findPreviousComment(octokit, repo, issue_number) {
+  const { data: comments } = await octokit.issues.listComments({
+    ...repo,
+    issue_number
+  });
+  return comments.find(comment => comment.user.login === "github-actions[bot]");
+}
+export async function updateComment(octokit, repo, comment_id, body) {
+  await octokit.issues.updateComment({
+    ...repo,
+    comment_id,
+    body
+  });
+}
+export async function createComment(octokit, repo, issue_number, body) {
+  await octokit.issues.createComment({
+    ...repo,
+    issue_number,
+    body
+  });
+}
diff --git a/src/main.ts b/src/main.ts
index 9172e53..7e6d160 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,40 +1,26 @@
 import * as core from "@actions/core";
 import { context, GitHub } from "@actions/github";
-
+import { findPreviousComment, createComment, updateComment } from "./comment";
 async function run() {
   try {
     const repo = context.repo;
-    const issue_number = context?.payload?.pull_request?.number;
-    if (!issue_number) {
+    const number = context?.payload?.pull_request?.number;
+    const body = core.getInput("message");
+    const githubToken = core.getInput("GITHUB_TOKEN");
+    if (!number) {
       core.setFailed("This action only works for pull_request");
       return;
     }
-    const body = core.getInput("message");
-    const githubToken = core.getInput("GITHUB_TOKEN");
     if (!body || !githubToken) {
       core.setFailed("invalid input: please check your workflow");
       return;
     }
     const octokit = new GitHub(githubToken);
-    const { data: comments } = await octokit.issues.listComments({
-      ...repo,
-      issue_number
-    });
-    const myComment = comments.find(
-      comment => comment.user.login === "github-actions[bot]"
-    );
-    if (myComment) {
-      await octokit.issues.updateComment({
-        ...repo,
-        comment_id: myComment.id,
-        body
-      });
+    const previous = await findPreviousComment(octokit, repo, number);
+    if (previous) {
+      await updateComment(octokit, repo, previous.id, body);
     } else {
-      await octokit.issues.createComment({
-        ...repo,
-        issue_number,
-        body
-      });
+      await createComment(octokit, repo, number, body);
     }
   } catch ({ message }) {
     core.setFailed(message);

From eba69144cea97d82d3f27e2e5cde5ffb09137a63 Mon Sep 17 00:00:00 2001
From: marocchino <marocchino@users.noreply.github.com>
Date: Sat, 23 Nov 2019 10:12:15 +0900
Subject: [PATCH 3/3] test: comment

---
 __tests__/comment.test.ts | 55 +++++++++++++++++++++++++++++++++++++++
 __tests__/main.test.ts    |  2 --
 2 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 __tests__/comment.test.ts
 delete mode 100644 __tests__/main.test.ts

diff --git a/__tests__/comment.test.ts b/__tests__/comment.test.ts
new file mode 100644
index 0000000..5a14561
--- /dev/null
+++ b/__tests__/comment.test.ts
@@ -0,0 +1,55 @@
+import {
+  findPreviousComment,
+  createComment,
+  updateComment
+} from "../src/comment";
+const repo = {};
+const body = "some message";
+it("findPreviousComment", async () => {
+  const comment = {
+    user: {
+      login: "github-actions[bot]"
+    }
+  };
+  const otherComment = {
+    user: {
+      login: "some-user"
+    }
+  };
+  const octokit = {
+    issues: {
+      listComments: jest.fn(() =>
+        Promise.resolve({
+          data: [otherComment, comment]
+        })
+      )
+    }
+  };
+
+  expect(await findPreviousComment(octokit, repo, 123)).toBe(comment);
+  expect(octokit.issues.listComments).toBeCalledWith({ issue_number: 123 });
+});
+it("updateComment", async () => {
+  const octokit = {
+    issues: {
+      updateComment: jest.fn(() => Promise.resolve())
+    }
+  };
+  expect(await updateComment(octokit, repo, 456, body)).toBeUndefined();
+  expect(octokit.issues.updateComment).toBeCalledWith({
+    comment_id: 456,
+    body
+  });
+});
+it("createComment", async () => {
+  const octokit = {
+    issues: {
+      createComment: jest.fn(() => Promise.resolve())
+    }
+  };
+  expect(await createComment(octokit, repo, 456, body)).toBeUndefined();
+  expect(octokit.issues.createComment).toBeCalledWith({
+    issue_number: 456,
+    body
+  });
+});
diff --git a/__tests__/main.test.ts b/__tests__/main.test.ts
deleted file mode 100644
index 34fbeb9..0000000
--- a/__tests__/main.test.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-test("create a comment when no comment", async () => {});
-test("update a comment when comment is exists", async () => {});