feat(cli): add aliases, more help details and tests

Cli help is more complete. Aliases are added to make it easier to set options. Tests for cli options are added

cli.js

@@ -15,16 +15,32 @@ var separator = '\n\n\n';
 
 var cli = meow({
   help: [
+    'Practice writing commit messages or test from a file.',
+    'If used without specifying a text file path, you will enter an interactive shell.',
+    'Parsed results are printed to stdout',
+    'By default, commits will be split by three newlines (`\\n\\n\\n`) or you can specify a separator.',
+    '',
     'Usage',
     '  conventional-commits-parser [<commit-separator>] [<path>...]',
-    '  If used without specifying a text file path, you will enter an interactive shell',
-    '  By default, commits will be split by three newlines (`\\n\\n\\n`) or you can specify a separator',
     '',
     'Example',
     '  conventional-commits-parser',
     '  conventional-commits-parser log.txt',
-    '  conventional-commits-parser log2.txt \'===\''
+    '  conventional-commits-parser log2.txt \'===\' >> output.txt',
+    '',
+    'Options',
+    '-m, --max-subject-length    Maximum subject length',
+    '-p, --header-pattern        Regex to match header pattern',
+    '-c, --close-keywords        Comma separated keywords that used to close issues',
+    '-b, --break-keywords        Comma separated keywords for breaking changes'
   ].join('\n')
+}, {
+  alias: {
+    m: 'maxSubjectLength',
+    p: 'headerPattern',
+    c: 'closeKeywords',
+    b: 'breakKeywords'
+  }
 });
 
 forEach(cli.input, function(arg) {

test/cli.spec.js

@@ -8,6 +8,7 @@ var through = require('through2');
 var cliPath = './cli.js';
 var output1 = readFileSync('test/expected/output1.txt', 'utf-8');
 var output2 = readFileSync('test/expected/output2.txt', 'utf-8');
+var output3 = readFileSync('test/expected/output3.txt', 'utf-8');
 
 describe('cli', function() {
   it('should parse commits in a file', function(done) {
@@ -40,18 +41,27 @@ describe('cli', function() {
 
   it('should error if files cannot be found', function(done) {
     var i = 0;
-    var cp = spawn(cliPath, ['test/fixtures/log.txt', 'test/fixtures/log3.txt', 'test/fixtures/log2.txt', 'test/fixtures/log4.txt', '===']);
+    var cp = spawn(cliPath, ['test/fixtures/log.txt', 'test/fixtures/log4.txt', 'test/fixtures/log2.txt', 'test/fixtures/log5.txt', '===']);
     cp.stderr
       .pipe(through(function(chunk, enc, cb) {
         if (i === 0) {
-          expect(chunk.toString()).to.contain('Failed to read file test/fixtures/log3.txt');
-        } else {
           expect(chunk.toString()).to.contain('Failed to read file test/fixtures/log4.txt');
+        } else {
+          expect(chunk.toString()).to.contain('Failed to read file test/fixtures/log5.txt');
         }
         i++;
         cb();
       }, function() {
         done();
       }));
   });
+
+  it('should work with options', function(done) {
+    var cp = spawn(cliPath, ['test/fixtures/log3.txt', '--max-subject-length', '5', '-p', '^(\\w*)(?:\\(([:\\w\\$\\.\\-\\* ]*)\\))?\\: (.*)$', '--close-keywords', 'close, fix', '-b', 'BREAKING NEWS']);
+    cp.stdout
+      .pipe(concat(function(chunk) {
+        expect(chunk.toString()).to.equal(output3);
+        done();
+      }));
+  });
 });

test/expected/output3.txt

@@ -0,0 +1,3 @@
+[
+{"hash":"9b1aff905b638aa274a5fc8f88662df446d374bd","header":"fix(category:subcategory): My subject","body":"This is my commit body.\nFixed #13233","footer":"BREAKING NEWS: A lot of changes!\nClose #10036, Closes #10000\nfix #9338","breaks":{"BREAKING NEWS":"A lot of changes!"},"closes":[10036,9338],"type":"fix","scope":"category:subcategory","subject":"My su"}
+]

test/fixtures/log3.txt

@@ -0,0 +1,11 @@
+9b1aff905b638aa274a5fc8f88662df446d374bd
+
+fix(category:subcategory): My subject
+
+This is my commit body.
+
+BREAKING NEWS: A lot of changes!
+
+Close #10036, Closes #10000
+Fixed #13233
+fix #9338