Fix test error and add GitHub Actions CI

.github/workflows/ci.yml

@@ -0,0 +1,59 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  mix-test:
+    runs-on: ubuntu-20.04
+
+    name: mix test (OTP ${{matrix.otp}} | Elixir ${{matrix.elixir}})
+
+    env:
+      MIX_ENV: test
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - elixir: 1.12.3
+            otp: 22.3
+          - elixir: 1.14.0
+            otp: 24.3.4
+            lint: lint
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{matrix.otp}}
+          elixir-version: ${{matrix.elixir}}
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            deps
+            _build
+          key: deps-${{ runner.os }}-${{matrix.otp}}-${{matrix.matrix}}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: deps-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}
+
+      - run: mix deps.get
+
+      - run: mix format --check-formatted
+        if: ${{ matrix.lint }}
+
+      - run: mix deps.unlock --check-unused
+        if: ${{ matrix.lint }}
+
+      - run: mix deps.compile
+
+      - run: mix compile --warnings-as-errors
+        if: ${{ matrix.lint }}
+
+      - run: mix test

README.md

@@ -1,5 +1,6 @@
 # LiveInspect
 
+[![CI](https://github.com/schrockwell/live_inspect/actions/workflows/ci.yml/badge.svg)](https://github.com/schrockwell/live_inspect/actions/workflows/ci.yml)
 [![Module Version](https://img.shields.io/hexpm/v/live_inspect.svg)](https://hex.pm/packages/live_inspect)
 [![Hex Docs](https://img.shields.io/badge/hex-docs-purple.svg)](https://hexdocs.pm/live_inspect/)
 [![License](https://img.shields.io/hexpm/l/live_inspect.svg)](https://github.com/schrockwell/live_inspect/blob/main/LICENSE)

test/live_dump_test.exs

@@ -1,8 +1,4 @@
 defmodule LiveDumpTest do
   use ExUnit.Case
   doctest LiveInspect
-
-  test "greets the world" do
-    assert LiveInspect.hello() == :world
-  end
 end