Chore: added tests for options normalize (#439)

* Chore: added tests for options normalize

* Chore: changed test description to normalizeOptions

Co-Authored-By: Kai Cataldo <kai@kaicataldo.com>

Co-authored-by: Kai Cataldo <kai@kaicataldo.com>

tests/lib/options.js

@@ -0,0 +1,60 @@
+/**
+ * @fileoverview Tests for options.
+ * @author Aniketh Saha
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const assert = require("assert"),
+    { normalizeOptions } = require("../../lib/options");
+
+//------------------------------------------------------------------------------
+// Tests
+//------------------------------------------------------------------------------
+
+describe("normalizeOptions", () => {
+    it("should throw error for sourceType module and ecmaVersion < 6", () => {
+        const option = {
+            sourceType: "module",
+            ecmaVersion: 5
+        };
+
+        assert.throws(() => {
+            normalizeOptions(option);
+        });
+    });
+
+    it("should normalize the ecmaVersion from year to version number", () => {
+        const option = {
+            ecmaVersion: 2018
+        };
+
+        const output = normalizeOptions(option);
+
+        assert.strictEqual(output.ecmaVersion, 9);
+    });
+
+    it("should throw error for unsupported ecmaVersion", () => {
+        const option = {
+            ecmaVersion: 2040
+        };
+
+        assert.throws(() => {
+            normalizeOptions(option);
+        });
+    });
+
+    it("should throw error for unsupported sourceType", () => {
+        const option = {
+            sourceType: "esm"
+        };
+
+        assert.throws(() => {
+            normalizeOptions(option);
+        });
+    });
+});