Restructure source and tests

src/main.js

@@ -0,0 +1,30 @@
+const core = require('@actions/core')
+const { wait } = require('./wait')
+
+/**
+ * The main function for the action.
+ * @returns {Promise<void>} Resolves when the action is complete.
+ */
+async function run() {
+  try {
+    const ms = core.getInput('milliseconds', { required: true })
+
+    // Debug logs are only output if the `ACTIONS_STEP_DEBUG` secret is true
+    core.debug(`Waiting ${ms} milliseconds ...`)
+
+    // Log the current timestamp, wait, then log the new timestamp
+    core.debug(new Date().toTimeString())
+    await wait(parseInt(ms, 10))
+    core.debug(new Date().toTimeString())
+
+    // Set outputs for other workflow steps to use
+    core.setOutput('time', new Date().toTimeString())
+  } catch (error) {
+    // Fail the workflow run if an error occurs
+    core.setFailed(error.message)
+  }
+}
+
+module.exports = {
+  run
+}