Merge master into releases/v1

.eslintrc.json

@@ -0,0 +1,16 @@
+{
+  "env": { "node": true, "jest": true },
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": { "ecmaVersion": 2020, "sourceType": "module" },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:import/errors",
+    "plugin:import/warnings",
+    "plugin:import/typescript",
+    "plugin:prettier/recommended",
+    "prettier/@typescript-eslint"
+  ],
+  "plugins": ["@typescript-eslint", "jest"]
+}

.github/workflows/workflow.yml

@@ -1,6 +1,11 @@
 name: Tests
+
 on:
   pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - '**.md'
   push:
     branches:
       - master
@@ -10,9 +15,11 @@ on:
 jobs:
   test:
     name: Test on ${{ matrix.os }}
+
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
+
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -22,10 +29,25 @@ jobs:
       with:
         node-version: '12.x'
 
+    - name: Get npm cache directory
+      id: npm-cache
+      run: |
+        echo "::set-output name=dir::$(npm config get cache)"
+
+    - uses: actions/cache@v1
+      with:
+        path: ${{ steps.npm-cache.outputs.dir }}
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-node-
+
     - run: npm ci
 
     - name: Prettier Format Check
       run: npm run format-check
 
+    - name: ESLint Check
+      run: npm run lint
+
     - name: Build & Test
       run: npm run test

README.md

@@ -28,7 +28,7 @@ Create a workflow `.yml` file in your repositories `.github/workflows` directory
 ### Example workflow
 
 ```yaml
-name: Example Caching with npm
+name: Caching Primes
 
 on: push
 
@@ -39,22 +39,19 @@ jobs:
     steps:
     - uses: actions/checkout@v1
 
-    - name: Cache node modules
+    - name: Cache Primes
+      id: cache-primes
       uses: actions/cache@v1
       with:
-        path: node_modules
+        path: prime-numbers
-        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        key: ${{ runner.os }}-primes
-        restore-keys: |
-          ${{ runner.os }}-node-
 
-    - name: Install Dependencies
+    - name: Generate Prime Numbers
-      run: npm install
+      if: steps.cache-primes.outputs.cache-hit != 'true'
+      run: /generate-primes.sh -d prime-numbers
     
-    - name: Build
+    - name: Use Prime Numbers
-      run: npm run build
+      run: /primes.sh -d prime-numbers
-
-    - name: Test
-      run: npm run test
 ```
 
 ## Ecosystem Examples
@@ -78,7 +75,7 @@ steps:
     id: cache
     with:
       path: path/to/dependencies
-      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles')}}
+      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
   
   - name: Install Dependencies
     if: steps.cache.outputs.cache-hit != 'true'

__tests__/__fixtures__/helloWorld.txt

@@ -0,0 +1 @@
+hello world

__tests__/actionUtils.test.ts

@@ -0,0 +1,226 @@
+import * as core from "@actions/core";
+import * as os from "os";
+import * as path from "path";
+
+import { Events, Outputs, State } from "../src/constants";
+import { ArtifactCacheEntry } from "../src/contracts";
+import * as actionUtils from "../src/utils/actionUtils";
+
+jest.mock("@actions/core");
+jest.mock("os");
+
+afterEach(() => {
+    delete process.env[Events.Key];
+});
+
+test("getArchiveFileSize returns file size", () => {
+    const filePath = path.join(__dirname, "__fixtures__", "helloWorld.txt");
+
+    const size = actionUtils.getArchiveFileSize(filePath);
+
+    expect(size).toBe(11);
+});
+
+test("isExactKeyMatch with undefined cache entry returns false", () => {
+    const key = "linux-rust";
+    const cacheEntry = undefined;
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with empty cache entry returns false", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {};
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with different keys returns false", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with different key accents returns false", () => {
+    const key = "linux-áccent";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-accent"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(false);
+});
+
+test("isExactKeyMatch with same key returns true", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-rust"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(true);
+});
+
+test("isExactKeyMatch with same key and different casing returns true", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "LINUX-RUST"
+    };
+
+    expect(actionUtils.isExactKeyMatch(key, cacheEntry)).toBe(true);
+});
+
+test("setOutputAndState with undefined entry to set cache-hit output", () => {
+    const key = "linux-rust";
+    const cacheEntry = undefined;
+
+    const setOutputMock = jest.spyOn(core, "setOutput");
+    const saveStateMock = jest.spyOn(core, "saveState");
+
+    actionUtils.setOutputAndState(key, cacheEntry);
+
+    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "false");
+    expect(setOutputMock).toHaveBeenCalledTimes(1);
+
+    expect(saveStateMock).toHaveBeenCalledTimes(0);
+});
+
+test("setOutputAndState with exact match to set cache-hit output and state", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-rust"
+    };
+
+    const setOutputMock = jest.spyOn(core, "setOutput");
+    const saveStateMock = jest.spyOn(core, "saveState");
+
+    actionUtils.setOutputAndState(key, cacheEntry);
+
+    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "true");
+    expect(setOutputMock).toHaveBeenCalledTimes(1);
+
+    expect(saveStateMock).toHaveBeenCalledWith(
+        State.CacheResult,
+        JSON.stringify(cacheEntry)
+    );
+    expect(saveStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("setOutputAndState with no exact match to set cache-hit output and state", () => {
+    const key = "linux-rust";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "linux-rust-bb828da54c148048dd17899ba9fda624811cfb43"
+    };
+
+    const setOutputMock = jest.spyOn(core, "setOutput");
+    const saveStateMock = jest.spyOn(core, "saveState");
+
+    actionUtils.setOutputAndState(key, cacheEntry);
+
+    expect(setOutputMock).toHaveBeenCalledWith(Outputs.CacheHit, "false");
+    expect(setOutputMock).toHaveBeenCalledTimes(1);
+
+    expect(saveStateMock).toHaveBeenCalledWith(
+        State.CacheResult,
+        JSON.stringify(cacheEntry)
+    );
+    expect(saveStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("getCacheState with no state returns undefined", () => {
+    const getStateMock = jest.spyOn(core, "getState");
+    getStateMock.mockImplementation(() => {
+        return "";
+    });
+
+    const state = actionUtils.getCacheState();
+
+    expect(state).toBe(undefined);
+
+    expect(getStateMock).toHaveBeenCalledWith(State.CacheResult);
+    expect(getStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("getCacheState with valid state", () => {
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getStateMock = jest.spyOn(core, "getState");
+    getStateMock.mockImplementation(() => {
+        return JSON.stringify(cacheEntry);
+    });
+
+    const state = actionUtils.getCacheState();
+
+    expect(state).toEqual(cacheEntry);
+
+    expect(getStateMock).toHaveBeenCalledWith(State.CacheResult);
+    expect(getStateMock).toHaveBeenCalledTimes(1);
+});
+
+test("isValidEvent returns false for unknown event", () => {
+    const event = "foo";
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(false);
+});
+
+test("resolvePath with no ~ in path", () => {
+    const filePath = ".cache/yarn";
+
+    const resolvedPath = actionUtils.resolvePath(filePath);
+
+    const expectedPath = path.resolve(filePath);
+    expect(resolvedPath).toBe(expectedPath);
+});
+
+test("resolvePath with ~ in path", () => {
+    const filePath = "~/.cache/yarn";
+
+    const homedir = jest.requireActual("os").homedir();
+    const homedirMock = jest.spyOn(os, "homedir");
+    homedirMock.mockImplementation(() => {
+        return homedir;
+    });
+
+    const resolvedPath = actionUtils.resolvePath(filePath);
+
+    const expectedPath = path.join(homedir, ".cache/yarn");
+    expect(resolvedPath).toBe(expectedPath);
+});
+
+test("resolvePath with home not found", () => {
+    const filePath = "~/.cache/yarn";
+    const homedirMock = jest.spyOn(os, "homedir");
+    homedirMock.mockImplementation(() => {
+        return "";
+    });
+
+    expect(() => actionUtils.resolvePath(filePath)).toThrow(
+        "Unable to resolve `~` to HOME"
+    );
+});
+
+test("isValidEvent returns true for push event", () => {
+    const event = Events.Push;
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(true);
+});
+
+test("isValidEvent returns true for pull request event", () => {
+    const event = Events.PullRequest;
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(true);
+});

__tests__/main.test.ts

@@ -1,22 +0,0 @@
-import * as core from "@actions/core";
-
-import { Inputs } from "../src/constants";
-import run from "../src/restore";
-import * as testUtils from "../src/utils/testUtils";
-
-test("restore with no path", async () => {
-    const failedMock = jest.spyOn(core, "setFailed");
-    await run();
-    expect(failedMock).toHaveBeenCalledWith(
-        "Input required and not supplied: path"
-    );
-});
-
-test("restore with no key", async () => {
-    testUtils.setInput(Inputs.Path, "node_modules");
-    const failedMock = jest.spyOn(core, "setFailed");
-    await run();
-    expect(failedMock).toHaveBeenCalledWith(
-        "Input required and not supplied: key"
-    );
-});

__tests__/restore.test.ts

@@ -0,0 +1,450 @@
+import * as core from "@actions/core";
+import * as exec from "@actions/exec";
+import * as io from "@actions/io";
+import * as path from "path";
+import * as cacheHttpClient from "../src/cacheHttpClient";
+import { Events, Inputs } from "../src/constants";
+import { ArtifactCacheEntry } from "../src/contracts";
+import run from "../src/restore";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("@actions/exec");
+jest.mock("@actions/io");
+jest.mock("../src/utils/actionUtils");
+jest.mock("../src/cacheHttpClient");
+
+beforeAll(() => {
+    jest.spyOn(actionUtils, "resolvePath").mockImplementation(filePath => {
+        return path.resolve(filePath);
+    });
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+
+    jest.spyOn(actionUtils, "getSupportedEvents").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.getSupportedEvents();
+    });
+
+    jest.spyOn(io, "which").mockImplementation(tool => {
+        return Promise.resolve(tool);
+    });
+});
+
+beforeEach(() => {
+    process.env[Events.Key] = Events.Push;
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+    delete process.env[Events.Key];
+});
+
+test("restore with invalid event", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+    const invalidEvent = "commit_comment";
+    process.env[Events.Key] = invalidEvent;
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported. Only push, pull_request events are supported at this time.`
+    );
+});
+
+test("restore with no path should fail", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        "Input required and not supplied: path"
+    );
+});
+
+test("restore with no key", async () => {
+    testUtils.setInput(Inputs.Path, "node_modules");
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        "Input required and not supplied: key"
+    );
+});
+
+test("restore with too many keys should fail", async () => {
+    const key = "node-test";
+    const restoreKeys = [...Array(20).keys()].map(x => x.toString());
+    testUtils.setInputs({
+        path: "node_modules",
+        key,
+        restoreKeys
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: Keys are limited to a maximum of 10.`
+    );
+});
+
+test("restore with large key should fail", async () => {
+    const key = "foo".repeat(512); // Over the 512 character limit
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: ${key} cannot be larger than 512 characters.`
+    );
+});
+
+test("restore with invalid key should fail", async () => {
+    const key = "comma,comma";
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+    const failedMock = jest.spyOn(core, "setFailed");
+    await run();
+    expect(failedMock).toHaveBeenCalledWith(
+        `Key Validation Error: ${key} cannot contain commas.`
+    );
+});
+
+test("restore with no cache found", async () => {
+    const key = "node-test";
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const clientMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    clientMock.mockImplementation(() => {
+        return Promise.resolve(null);
+    });
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(warningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}.`
+    );
+});
+
+test("restore with server error should fail", async () => {
+    const key = "node-test";
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const clientMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    clientMock.mockImplementation(() => {
+        throw new Error("HTTP Error Occurred");
+    });
+
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+
+    expect(warningMock).toHaveBeenCalledTimes(1);
+    expect(warningMock).toHaveBeenCalledWith("HTTP Error Occurred");
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(false);
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with restore keys and no cache found", async () => {
+    const key = "node-test";
+    const restoreKey = "node-";
+    testUtils.setInputs({
+        path: "node_modules",
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const clientMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    clientMock.mockImplementation(() => {
+        return Promise.resolve(null);
+    });
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(warningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache not found for input keys: ${key}, ${restoreKey}.`
+    );
+});
+
+test("restore with cache found", async () => {
+    const key = "node-test";
+    const cachePath = path.resolve("node_modules");
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: key,
+        scope: "refs/heads/master",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getCacheMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    getCacheMock.mockImplementation(() => {
+        return Promise.resolve(cacheEntry);
+    });
+    const tempPath = "/foo/bar";
+
+    const createTempDirectoryMock = jest.spyOn(
+        actionUtils,
+        "createTempDirectory"
+    );
+    createTempDirectoryMock.mockImplementation(() => {
+        return Promise.resolve(tempPath);
+    });
+
+    const archivePath = path.join(tempPath, "cache.tgz");
+    const setCacheStateMock = jest.spyOn(actionUtils, "setCacheState");
+    const downloadCacheMock = jest.spyOn(cacheHttpClient, "downloadCache");
+
+    const fileSize = 142;
+    const getArchiveFileSizeMock = jest
+        .spyOn(actionUtils, "getArchiveFileSize")
+        .mockReturnValue(fileSize);
+
+    const mkdirMock = jest.spyOn(io, "mkdirP");
+    const execMock = jest.spyOn(exec, "exec");
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(getCacheMock).toHaveBeenCalledWith([key]);
+    expect(setCacheStateMock).toHaveBeenCalledWith(cacheEntry);
+    expect(createTempDirectoryMock).toHaveBeenCalledTimes(1);
+    expect(downloadCacheMock).toHaveBeenCalledWith(cacheEntry, archivePath);
+    expect(getArchiveFileSizeMock).toHaveBeenCalledWith(archivePath);
+    expect(mkdirMock).toHaveBeenCalledWith(cachePath);
+
+    const IS_WINDOWS = process.platform === "win32";
+    const args = IS_WINDOWS
+        ? [
+              "-xz",
+              "--force-local",
+              "-f",
+              archivePath.replace(/\\/g, "/"),
+              "-C",
+              cachePath.replace(/\\/g, "/")
+          ]
+        : ["-xz", "-f", archivePath, "-C", cachePath];
+
+    expect(execMock).toHaveBeenCalledTimes(1);
+    expect(execMock).toHaveBeenCalledWith(`"tar"`, args);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(true);
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(warningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with a pull request event and cache found", async () => {
+    const key = "node-test";
+    const cachePath = path.resolve("node_modules");
+    testUtils.setInputs({
+        path: "node_modules",
+        key
+    });
+
+    process.env[Events.Key] = Events.PullRequest;
+
+    const infoMock = jest.spyOn(core, "info");
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: key,
+        scope: "refs/heads/master",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getCacheMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    getCacheMock.mockImplementation(() => {
+        return Promise.resolve(cacheEntry);
+    });
+    const tempPath = "/foo/bar";
+
+    const createTempDirectoryMock = jest.spyOn(
+        actionUtils,
+        "createTempDirectory"
+    );
+    createTempDirectoryMock.mockImplementation(() => {
+        return Promise.resolve(tempPath);
+    });
+
+    const archivePath = path.join(tempPath, "cache.tgz");
+    const setCacheStateMock = jest.spyOn(actionUtils, "setCacheState");
+    const downloadCacheMock = jest.spyOn(cacheHttpClient, "downloadCache");
+
+    const fileSize = 62915000;
+    const getArchiveFileSizeMock = jest
+        .spyOn(actionUtils, "getArchiveFileSize")
+        .mockReturnValue(fileSize);
+
+    const mkdirMock = jest.spyOn(io, "mkdirP");
+    const execMock = jest.spyOn(exec, "exec");
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(getCacheMock).toHaveBeenCalledWith([key]);
+    expect(setCacheStateMock).toHaveBeenCalledWith(cacheEntry);
+    expect(createTempDirectoryMock).toHaveBeenCalledTimes(1);
+    expect(downloadCacheMock).toHaveBeenCalledWith(cacheEntry, archivePath);
+    expect(getArchiveFileSizeMock).toHaveBeenCalledWith(archivePath);
+    expect(infoMock).toHaveBeenCalledWith(`Cache Size: ~60 MB (62915000 B)`);
+    expect(mkdirMock).toHaveBeenCalledWith(cachePath);
+
+    const IS_WINDOWS = process.platform === "win32";
+    const args = IS_WINDOWS
+        ? [
+              "-xz",
+              "--force-local",
+              "-f",
+              archivePath.replace(/\\/g, "/"),
+              "-C",
+              cachePath.replace(/\\/g, "/")
+          ]
+        : ["-xz", "-f", archivePath, "-C", cachePath];
+
+    expect(execMock).toHaveBeenCalledTimes(1);
+    expect(execMock).toHaveBeenCalledWith(`"tar"`, args);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(true);
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(warningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("restore with cache found for restore key", async () => {
+    const key = "node-test";
+    const restoreKey = "node-";
+    const cachePath = path.resolve("node_modules");
+    testUtils.setInputs({
+        path: "node_modules",
+        key,
+        restoreKeys: [restoreKey]
+    });
+
+    const infoMock = jest.spyOn(core, "info");
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: restoreKey,
+        scope: "refs/heads/master",
+        archiveLocation: "www.actionscache.test/download"
+    };
+    const getCacheMock = jest.spyOn(cacheHttpClient, "getCacheEntry");
+    getCacheMock.mockImplementation(() => {
+        return Promise.resolve(cacheEntry);
+    });
+    const tempPath = "/foo/bar";
+
+    const createTempDirectoryMock = jest.spyOn(
+        actionUtils,
+        "createTempDirectory"
+    );
+    createTempDirectoryMock.mockImplementation(() => {
+        return Promise.resolve(tempPath);
+    });
+
+    const archivePath = path.join(tempPath, "cache.tgz");
+    const setCacheStateMock = jest.spyOn(actionUtils, "setCacheState");
+    const downloadCacheMock = jest.spyOn(cacheHttpClient, "downloadCache");
+
+    const fileSize = 142;
+    const getArchiveFileSizeMock = jest
+        .spyOn(actionUtils, "getArchiveFileSize")
+        .mockReturnValue(fileSize);
+
+    const mkdirMock = jest.spyOn(io, "mkdirP");
+    const execMock = jest.spyOn(exec, "exec");
+    const setCacheHitOutputMock = jest.spyOn(actionUtils, "setCacheHitOutput");
+
+    await run();
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(getCacheMock).toHaveBeenCalledWith([key, restoreKey]);
+    expect(setCacheStateMock).toHaveBeenCalledWith(cacheEntry);
+    expect(createTempDirectoryMock).toHaveBeenCalledTimes(1);
+    expect(downloadCacheMock).toHaveBeenCalledWith(cacheEntry, archivePath);
+    expect(getArchiveFileSizeMock).toHaveBeenCalledWith(archivePath);
+    expect(infoMock).toHaveBeenCalledWith(`Cache Size: ~0 MB (142 B)`);
+    expect(mkdirMock).toHaveBeenCalledWith(cachePath);
+
+    const IS_WINDOWS = process.platform === "win32";
+    const args = IS_WINDOWS
+        ? [
+              "-xz",
+              "--force-local",
+              "-f",
+              archivePath.replace(/\\/g, "/"),
+              "-C",
+              cachePath.replace(/\\/g, "/")
+          ]
+        : ["-xz", "-f", archivePath, "-C", cachePath];
+
+    expect(execMock).toHaveBeenCalledTimes(1);
+    expect(execMock).toHaveBeenCalledWith(`"tar"`, args);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith(false);
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache restored from key: ${restoreKey}`
+    );
+    expect(warningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});

__tests__/save.test.ts

@@ -0,0 +1,329 @@
+import * as core from "@actions/core";
+import * as exec from "@actions/exec";
+import * as io from "@actions/io";
+import * as path from "path";
+import * as cacheHttpClient from "../src/cacheHttpClient";
+import { Inputs } from "../src/constants";
+import { ArtifactCacheEntry } from "../src/contracts";
+import run from "../src/save";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
+
+jest.mock("@actions/core");
+jest.mock("@actions/exec");
+jest.mock("@actions/io");
+jest.mock("../src/utils/actionUtils");
+jest.mock("../src/cacheHttpClient");
+
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
+
+    jest.spyOn(actionUtils, "getCacheState").mockImplementation(() => {
+        return jest.requireActual("../src/utils/actionUtils").getCacheState();
+    });
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "resolvePath").mockImplementation(filePath => {
+        return path.resolve(filePath);
+    });
+
+    jest.spyOn(actionUtils, "createTempDirectory").mockImplementation(() => {
+        return Promise.resolve("/foo/bar");
+    });
+
+    jest.spyOn(io, "which").mockImplementation(tool => {
+        return Promise.resolve(tool);
+    });
+});
+
+afterEach(() => {
+    testUtils.clearInputs();
+});
+
+test("save with no primary key in state outputs warning", async () => {
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return "";
+        });
+
+    await run();
+
+    expect(warningMock).toHaveBeenCalledWith(
+        `Error retrieving key from state.`
+    );
+    expect(warningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with exact match returns early", async () => {
+    const infoMock = jest.spyOn(core, "info");
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: primaryKey,
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+
+    const execMock = jest.spyOn(exec, "exec");
+
+    await run();
+
+    expect(infoMock).toHaveBeenCalledWith(
+        `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
+    );
+
+    expect(execMock).toHaveBeenCalledTimes(0);
+
+    expect(warningMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+});
+
+test("save with missing input outputs warning", async () => {
+    const warningMock = jest.spyOn(core, "warning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const cacheEntry: ArtifactCacheEntry = {
+        cacheKey: "Linux-node-",
+        scope: "refs/heads/master",
+        creationTime: "2019-11-13T19:18:02+00:00",
+        archiveLocation: "www.actionscache.test/download"
+    };
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return JSON.stringify(cacheEntry);
+        })
+        // Cache Key State