feat: add test framework (#48)

* Add test framework

* Add aws-region tests

* Add azure-region tests

* Update CONTRIBUTING.md

* Add formatting

* Improve fmt

* Format Terraform

azure-region/main.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from "bun:test";
+import {
+  executeScriptInContainer,
+  runTerraformApply,
+  runTerraformInit,
+  testRequiredVariables,
+} from "../test";
+
+describe("azure-region", async () => {
+  await runTerraformInit(import.meta.dir);
+
+  testRequiredVariables(import.meta.dir, {});
+
+  it("default output", async () => {
+    const state = await runTerraformApply(import.meta.dir, {});
+    expect(state.outputs.value.value).toBe("eastus");
+  });
+
+  it("customized default", async () => {
+    const state = await runTerraformApply(import.meta.dir, {
+      default: "westus",
+    });
+    expect(state.outputs.value.value).toBe("westus");
+  });
+});