Permit empty collection of vars (#7)

index.js

@@ -54,7 +54,6 @@ const isWindows = () => {
     return isWsl || process.platform === 'win32';
 };
 
-// eslint-disable-next-line max-statements
 const envy = (input) => {
     const envPath = input || '.env';
     const examplePath = envPath + '.example';
@@ -69,9 +68,6 @@ const envy = (input) => {
     const exampleEnvKeys = Object.keys(exampleEnv);
     const camelizedExampleEnvKeys = Object.keys(camelcaseKeys(exampleEnv));
 
-    if (exampleEnvKeys.length === 0) {
-        throw new Error(`At least one entry is required in ${examplePath}`);
-    }
     const exampleHasValues = Object.values(exampleEnv).some((val) => {
         return val !== '';
     });

test.js

@@ -39,6 +39,10 @@ test('returns excess vars in .env', (t) => {
     });
 });
 
+test('returns empty collection of vars', (t) => {
+    t.deepEqual(fixture('empty-example'), {});
+});
+
 test('can parse complex values', (t) => {
     // Complex values are those which have a high risk of confusing the parser,
     // such as those using reserved characters.
@@ -98,14 +102,6 @@ test('requires secure file permissions on .env.example', (t) => {
     t.is(err.message, `File must not be writable by others. Fix: chmod o-w '${filepath}'`);
 });
 
-test('requires at least one entry in .env.example', (t) => {
-    const err = t.throws(() => {
-        fixture('empty-example');
-    }, Error);
-    const filepath = path.join('fixture', 'empty-example', '.env.example');
-    t.is(err.message, `At least one entry is required in ${filepath}`);
-});
-
 test('does not modify process.env', (t) => {
     const oldEnvDescriptor = Object.getOwnPropertyDescriptor(process, 'env');
     const oldEnv = process.env;