Add tests for supporting stripTrailingCr in createPatch

Author: oBusk

test/patch/create.js

@@ -631,6 +631,45 @@ describe('patch/create', function() {
       const diffResult = createTwoFilesPatch('foo', 'bar', '', '');
       expect(diffResult).to.equal(expectedResult);
     });
+
+    describe('stripTrailingCr', function() {
+      it('stripTrailingCr: false', function() {
+        const expectedResult =
+        '===================================================================\n'
+        + '--- foo\n'
+        + '+++ bar\n'
+        + '@@ -1,2 +1,2 @@\n'
+        + '\-line\n'
+        + '\+line\r\n'
+        + '\ line\n'
+        + '\\ No newline at end of file\n';
+        expect(createTwoFilesPatch(
+          'foo',
+          'bar',
+          'line\nline',
+          'line\r\nline',
+          undefined,
+          undefined,
+          {stripTrailingCr: false}
+        )).to.equal(expectedResult);
+      });
+
+      it('stripTrailingCr: true', function() {
+        const expectedResult =
+          '===================================================================\n'
+          + '--- foo\n'
+          + '+++ bar\n';
+        expect(createTwoFilesPatch(
+          'foo',
+          'bar',
+          'line\nline',
+          'line\r\nline',
+          undefined,
+          undefined,
+          {stripTrailingCr: true}
+        )).to.equal(expectedResult);
+      });
+    });
   });
 
   describe('#structuredPatch', function() {