Fix parsing diffs for empty files

index.js

@@ -68,6 +68,11 @@
                                 if (leftStr.indexOf('file mode') === 0) {
                                     currentInfo[infoType === 'new' ? 'newMode' : 'oldMode'] = leftStr.slice(10);
                                 }
+                                currentInfoType = infoType === 'new' ? 'add' : 'delete';
+                                var prevLine = lines[i - 1];
+                                var fileName = prevLine.substring(prevLine.indexOf(' b/') + 3);
+                                currentInfo.newPath = infoType === 'new' ? fileName : '/dev/null';
+                                currentInfo.oldPath = infoType === 'new' ? '/dev/null' : fileName;
                                 break;
 
                             case 'similarity':

test/git.test.js

@@ -17,6 +17,15 @@ describe("git specific tests", () => {
         expect(file.newMode).toBe('100644');
     });
 
+    it("should have type add for empty files", () => {
+        const diff = parse("add-empty.diff");
+        const file = diff[0];
+        expect(file.type).toBe("add");
+        expect(file.oldPath).toBe("/dev/null");
+        expect(file.newPath).toBe("a.txt");
+        expect(file.newMode).toBe('100644');
+    });
+
     it("should have type delete", () => {
         const diff = parse("rm.diff");
         const file = diff[0];
@@ -26,6 +35,15 @@ describe("git specific tests", () => {
         expect(file.newPath).toBe("/dev/null");
     });
 
+    it("should have type delete for empty files", () => {
+        const diff = parse("rm-empty.diff");
+        const file = diff[0];
+        expect(file.type).toBe("delete");
+        expect(file.oldPath).toBe("a.txt");
+        expect(file.oldMode).toBe('100644');
+        expect(file.newPath).toBe("/dev/null");
+    });
+
     it("should have type rename", () => {
         const diff = parse("mv.diff");
         const file = diff[0];

test/git/add-empty.diff

@@ -0,0 +1,3 @@
+diff --git a/a.txt b/a.txt
+new file mode 100644
+index 0000000..7898192

test/git/rm-empty.diff

@@ -0,0 +1,3 @@
+diff --git a/a.txt b/a.txt
+deleted file mode 100644
+index 7898192..0000000