Test coverage (#1433)

* Test for just flags and just description

* Edge case test for wrap with trivial input

* Add obscure edge case for coverage

* Add test for variadic argument usage/help

* Suppress tests that uncredited coverage and not currently chasing

* Revert "Suppress tests that uncredited coverage and not currently chasing"

This reverts commit d3c9146.

tests/args.variadic.test.js

@@ -68,4 +68,13 @@ describe('variadic argument', () => {
       program.command('sub <variadicArg...> [optionalArg]');
     }).toThrow("only the last argument can be variadic 'variadicArg'");
   });
+
+  test('when variadic argument then usage shows variadic', () => {
+    const program = new commander.Command();
+    program
+      .name('foo')
+      .arguments('[args...]');
+
+    expect(program.usage()).toBe('[options] [args...]');
+  });
 });

tests/command.helpOption.test.js

@@ -68,6 +68,22 @@ describe('helpOption', () => {
     expect(helpInformation).toMatch(/-C,--custom-help +custom help output/);
   });
 
+  test('when helpOption has just flags then helpInformation includes default description', () => {
+    const program = new commander.Command();
+    program
+      .helpOption('-C,--custom-help');
+    const helpInformation = program.helpInformation();
+    expect(helpInformation).toMatch(/-C,--custom-help +display help for command/);
+  });
+
+  test('when helpOption has just description then helpInformation includes default flags', () => {
+    const program = new commander.Command();
+    program
+      .helpOption(undefined, 'custom help output');
+    const helpInformation = program.helpInformation();
+    expect(helpInformation).toMatch(/-h, --help +custom help output/);
+  });
+
   test('when helpOption(false) then helpInformation does not include --help', () => {
     const program = new commander.Command();
     program

tests/help.wrap.test.js

@@ -4,13 +4,20 @@ const commander = require('../');
 // There is some overlap with the higher level Command tests (which predate Help).
 
 describe('wrap', () => {
-  test('when string fits into width then no wrap', () => {
+  test('when string fits into width then returns input', () => {
     const text = 'a '.repeat(24) + 'a';
     const helper = new commander.Help();
     const wrapped = helper.wrap(text, 50, 3);
     expect(wrapped).toEqual(text);
   });
 
+  test('when string shorter than indent then returns input', () => {
+    const text = 'a';
+    const helper = new commander.Help();
+    const wrapped = helper.wrap(text, 50, 3);
+    expect(wrapped).toEqual(text);
+  });
+
   test('when string exceeds width then wrap', () => {
     const text = 'a '.repeat(30) + 'a';
     const helper = new commander.Help();

tests/options.bool.test.js

@@ -106,6 +106,16 @@ describe('boolean flag with non-boolean default', () => {
     program.parse(['node', 'test', '--olives']);
     expect(program.opts().olives).toBe(flagValue);
   });
+
+  test('when flag implied and negated then value is false', () => {
+    const flagValue = 'black';
+    const program = new commander.Command();
+    program
+      .option('-v, --olives', 'Add olives? Sorry we only have black.', flagValue)
+      .option('--no-olives');
+    program.parse(['node', 'test', '--olives', '--no-olives']);
+    expect(program.opts().olives).toBe(false);
+  });
 });
 
 // Regression test for #1301 with `-no-` in middle of option