replace jest with ava

node_modules/ava/lib/reporters/improper-usage-messages.js

@@ -0,0 +1,55 @@
+'use strict';
+const chalk = require('../chalk').get();
+const pkg = require('../../package.json');
+
+exports.forError = error => {
+	if (!error.improperUsage) {
+		return null;
+	}
+
+	const {assertion} = error;
+	if (assertion === 'throws' || assertion === 'notThrows') {
+		return `Try wrapping the first argument to \`t.${assertion}()\` in a function:
+
+  ${chalk.cyan(`t.${assertion}(() => { `)}${chalk.grey('/* your code here */')}${chalk.cyan(' })')}
+
+Visit the following URL for more details:
+
+  ${chalk.blue.underline(`https://github.com/avajs/ava/blob/v${pkg.version}/docs/03-assertions.md#throwsfn-expected-message`)}`;
+	}
+
+	if (assertion === 'snapshot') {
+		const {name, snapPath} = error.improperUsage;
+
+		if (name === 'ChecksumError') {
+			return `The snapshot file is corrupted.
+
+File path: ${chalk.yellow(snapPath)}
+
+Please run AVA again with the ${chalk.cyan('--update-snapshots')} flag to recreate it.`;
+		}
+
+		if (name === 'LegacyError') {
+			return `The snapshot file was created with AVA 0.19. It’s not supported by this AVA version.
+
+File path: ${chalk.yellow(snapPath)}
+
+Please run AVA again with the ${chalk.cyan('--update-snapshots')} flag to upgrade.`;
+		}
+
+		if (name === 'VersionMismatchError') {
+			const {snapVersion, expectedVersion} = error.improperUsage;
+			const upgradeMessage = snapVersion < expectedVersion ?
+				`Please run AVA again with the ${chalk.cyan('--update-snapshots')} flag to upgrade.` :
+				'You should upgrade AVA.';
+
+			return `The snapshot file is v${snapVersion}, but only v${expectedVersion} is supported.
+
+File path: ${chalk.yellow(snapPath)}
+
+${upgradeMessage}`;
+		}
+	}
+
+	return null;
+};