feat(power-assert-formatter): outputOffset option to configure number of spaces inserted at the left

Author: twada

lib/default-options.js

@@ -3,6 +3,7 @@ module.exports = function defaultOptions () {
     return {
         lineDiffThreshold: 5,
         maxDepth: 1,
+        outputOffset: 0,
         anonymous: 'Object',
         circular: '#@Circular#',
         lineSeparator: '\n',

lib/string-writer.js

@@ -1,12 +1,22 @@
 'use strict';
 
+function spacerStr (len) {
+    var str = '';
+    for(var i = 0; i < len; i += 1) {
+        str += ' ';
+    }
+    return str;
+}
+
 function StringWriter (config) {
     this.lines = [];
     this.lineSeparator = config.lineSeparator;
+    this.regex = new RegExp(this.lineSeparator, 'g');
+    this.spacer = spacerStr(config.outputOffset);
 }
 
 StringWriter.prototype.write = function (str) {
-    this.lines.push(str);
+    this.lines.push(this.spacer + str.replace(this.regex, this.lineSeparator + this.spacer));
 };
 
 StringWriter.prototype.flush = function () {

test/options_test.js

@@ -43,6 +43,59 @@ suite('lineSeparator option', function () {
     lineSeparatorTest('CRLF', {lineSeparator: '\r\n'}, '\r\n');
 });
 
+
+suite('outputOffset option', function () {
+    function outputOffsetCustomizationTest (option, expectedLines) {
+        var assert = empower(baseAssert, createFormatter(option));
+        test(JSON.stringify(option), function () {
+            var hoge = 'foo';
+            var fuga = 'bar';
+            try {
+                eval(weave('assert.ok(hoge === fuga, "comment");'));
+            } catch (e) {
+                baseAssert.equal(e.name, 'AssertionError');
+                var actual = e.message.split(createFormatter.defaultOptions().lineSeparator);
+                baseAssert.deepEqual(actual, expectedLines);
+            }
+        });
+    }
+    outputOffsetCustomizationTest({outputOffset: 1}, [
+        'comment  # /path/to/some_test.js:1',
+        ' ',
+        ' assert.ok(hoge === fuga, "comment")',
+        '           |    |   |               ',
+        '           |    |   "bar"           ',
+        '           |    false               ',
+        '           "foo"                    ',
+        ' ',
+        ' --- [string] fuga',
+        ' +++ [string] hoge',
+        ' @@ -1,3 +1,3 @@',
+        ' -bar',
+        ' +foo',
+        ' ',
+        ' '
+    ]);
+    outputOffsetCustomizationTest({outputOffset: 3}, [
+        'comment    # /path/to/some_test.js:1',
+        '   ',
+        '   assert.ok(hoge === fuga, "comment")',
+        '             |    |   |               ',
+        '             |    |   "bar"           ',
+        '             |    false               ',
+        '             "foo"                    ',
+        '   ',
+        '   --- [string] fuga',
+        '   +++ [string] hoge',
+        '   @@ -1,3 +1,3 @@',
+        '   -bar',
+        '   +foo',
+        '   ',
+        '   '
+    ]);
+});
+
+
 suite('renderers customization', function () {
     function rendererCustomizationTest (name, option, expectedLines) {
         var assert = empower(baseAssert, createFormatter(option));