Add GHA and pseud test

Author: lambdalisue

.github/workflows/test.yml

@@ -0,0 +1,36 @@
+name: deno
+
+on: [push]
+
+jobs:
+  lint:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: denolib/setup-deno@v2
+        with:
+          deno-version: v1.7.2
+      - name: Lint
+        run: deno lint --unstable
+
+  format:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: denolib/setup-deno@v2
+        with:
+          deno-version: v1.7.2
+      - name: Format
+        run: |
+          deno fmt --check
+
+  test:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: denolib/setup-deno@v2
+        with:
+          deno-version: v1.7.2
+      - name: Test
+        run: |
+          deno test

deps_test.ts

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+export * from "https://deno.land/[email protected]/testing/asserts.ts";

test.ts

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+import { assertEquals } from "./deps_test.ts";
+
+Deno.test("1 + 1 = 2", () => {
+  assertEquals(1 + 1, 2);
+});