Init with version 0.1

.gitignore

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+/.idea/
+/node_modules/
+

README.md

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-# changed-lines-count-labeler
-An action for automatically labelling pull requests based on the changed lines count
+# Changed Lines Count Labeler
+
+Automatically label new pull requests based on the changed lines count.
+
+## Usage
+
+### Create `.github/changed-lines-count-labeler.yml`
+
+Create a `.github/changed-lines-count-labeler.yml` file with a list of labels and [minimatch](https://github.com/isaacs/minimatch) globs to match to apply the label.
+
+The key is the name of the label in your repository that you want to add (eg: "small", "large") and the value is the minimum and maximum count of lines.
+
+#### Examples
+
+```yml
+# Add 'small' to any changes below 10 lines
+small:
+  max: 9
+
+# Add 'medium' to any changes between 10 and 100 lines
+medium:
+  min: 10
+  max: 99
+
+# Add 'large' to any changes for more than 100 lines
+large:
+  min: 100
+```
+
+### Create Workflow
+
+Create a workflow (eg: `.github/workflows/labeler.yml` see [Creating a Workflow file](https://help.github.com/en/articles/configuring-a-workflow#creating-a-workflow-file)) to utilize the labeler action with content:
+
+```yml
+name: "Pull Request Labeler"
+on: [pull_request]
+
+jobs:
+  changed-lines-count-labeler:
+    runs-on: ubuntu-latest
+    name: An action for automatically labelling pull requests based on the changed lines count
+  steps:
+    - name: Set a label
+      uses: vkirilichev/[email protected]
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        configuration-path: .github/changed-lines-count-labeler.yml
+```
+
+_Note: This grants access to the `GITHUB_TOKEN` so the action can make calls to GitHub's rest API_
+
+#### Inputs
+
+Various inputs are defined in [`action.yml`](action.yml) to let you configure the labeler:
+
+| Name | Description | Default |
+| - | - | - |
+| `repo-token` | Token to use to authorize label changes. Typically the GITHUB_TOKEN secret, with `contents:read` and `pull-requests:write` access | N/A |
+| `configuration-path` | The path to the label configuration file | `.github/changed-lines-count-labeler.yml` |

__mocks__/@actions/github.ts

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+export const context = {
+  payload: {
+    pull_request: {
+      number: 1,
+    },
+  },
+  repo: {
+    owner: "vkirilichev",
+    repo: "changed-lines-count-labeler",
+  },
+};
+
+const mockApi = {
+  rest: {
+    issues: {
+      addLabels: jest.fn(),
+      removeLabel: jest.fn(),
+    },
+    pulls: {
+      get: jest.fn().mockResolvedValue({}),
+      listFiles: {
+        endpoint: {
+          merge: jest.fn().mockReturnValue({}),
+        },
+      },
+    },
+    repos: {
+      getContent: jest.fn(),
+    },
+  },
+  paginate: jest.fn(),
+};
+
+export const getOctokit = jest.fn().mockImplementation(() => mockApi);

__tests__/fixtures/config.yml

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+petit:
+    min: 0
+    max: 5
+grande:
+    min: 100
+    max: 500

__tests__/labeler.test.ts

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+import {checkBoundaries} from "../src/labeler";
+
+import * as core from "@actions/core";
+
+jest.mock("@actions/core");
+
+beforeAll(() => {
+  jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+    return jest.requireActual("@actions/core").getInput(name, options);
+  });
+});
+
+const config = { min: 2, max: 5 };
+
+describe("checkBoundaries", () => {
+  it("returns true when our boundaries include the number of changed files", () => {
+    const result = checkBoundaries(2, config);
+    expect(result).toBeTruthy();
+  });
+
+  it("returns false when our boundaries does not include the number of changed files", () => {
+    const result = checkBoundaries(1, config);
+    expect(result).toBeFalsy();
+  });
+
+  it("returns false when our boundaries does not include the number of changed files", () => {
+    const result = checkBoundaries(6, config);
+    expect(result).toBeFalsy();
+  });
+});

__tests__/main.test.ts

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+import { run } from "../src/labeler";
+import * as github from "@actions/github";
+import * as core from "@actions/core";
+
+const fs = jest.requireActual("fs");
+
+jest.mock("@actions/core");
+jest.mock("@actions/github");
+
+const gh = github.getOctokit("_");
+const addLabelsMock = jest.spyOn(gh.rest.issues, "addLabels");
+const removeLabelMock = jest.spyOn(gh.rest.issues, "removeLabel");
+const reposMock = jest.spyOn(gh.rest.repos, "getContent");
+const getPullMock = jest.spyOn(gh.rest.pulls, "get");
+
+const yamlFixtures = {
+  "config.yml": fs.readFileSync("__tests__/fixtures/config.yml"),
+};
+
+afterAll(() => jest.restoreAllMocks());
+
+describe("run", () => {
+  it("adds labels to PRs which changed file size is inside configured boundaries", async () => {
+    usingLabelerConfigYaml("config.yml");
+    getPullMock.mockResolvedValue(<any>{
+      data: {
+        additions: 1,
+        deletions: 0,
+        labels: [],
+      },
+    });
+
+    await run();
+
+    expect(removeLabelMock).toHaveBeenCalledTimes(0);
+    expect(addLabelsMock).toHaveBeenCalledTimes(1);
+    expect(addLabelsMock).toHaveBeenCalledWith({
+      owner: "vkirilichev",
+      repo: "changed-lines-count-labeler",
+      issue_number: 1,
+      labels: ["petit"],
+    });
+  });
+
+  it("does not add labels to PRs which changed file size is outside of configured boundaries", async () => {
+    usingLabelerConfigYaml("config.yml");
+    getPullMock.mockResolvedValue(<any>{
+      data: {
+        additions: 5,
+        deletions: 1,
+        labels: [],
+      },
+    });
+
+    await run();
+
+    expect(removeLabelMock).toHaveBeenCalledTimes(0);
+    expect(addLabelsMock).toHaveBeenCalledTimes(0);
+  });
+
+  it("deletes existing PR labels that is not longer insode of configured boundaries", async () => {
+    let mockInput = {
+      "repo-token": "foo",
+      "configuration-path": "bar"
+    };
+
+    jest
+      .spyOn(core, "getInput")
+      .mockImplementation((name: string, ...opts) => mockInput[name]);
+
+    usingLabelerConfigYaml("config.yml");
+    getPullMock.mockResolvedValue(<any>{
+      data: {
+        additions: 1,
+        deletions: 0,
+        labels: [{ name: "grande" }],
+      },
+    });
+
+    await run();
+
+    expect(addLabelsMock).toHaveBeenCalledTimes(1);
+    expect(removeLabelMock).toHaveBeenCalledTimes(1);
+    expect(removeLabelMock).toHaveBeenCalledWith({
+      owner: "vkirilichev",
+      repo: "changed-lines-count-labeler",
+      issue_number: 1,
+      name: "grande",
+    });
+  });
+});
+
+function usingLabelerConfigYaml(fixtureName: keyof typeof yamlFixtures): void {
+  reposMock.mockResolvedValue(<any>{
+    data: { content: yamlFixtures[fixtureName], encoding: "utf8" },
+  });
+}
+

action.yml

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+name: 'Changed Lines Count Labeler'
+description: 'Set a label based on the number of lines changed'
+inputs:
+  repo-token:
+    description: 'The GITHUB_TOKEN secret'
+  configuration-path:
+    description: 'The path for the label configurations'
+    default: '.github/changed-lines-count-labeler.yml'
+    required: false
+runs:
+  using: 'node16'
+  main: 'dist/index.js'