Add junit output for files which are successfully linted.

src/formatters/junitFormatter.ts

@@ -41,7 +41,7 @@ export class Formatter extends AbstractFormatter {
     };
     /* tslint:enable:object-literal-sort-keys */
 
-    public format(failures: RuleFailure[]): string {
+    public format(failures: RuleFailure[], _fixes?: RuleFailure[], fileNames?: string[]): string {
         let output = '<?xml version="1.0" encoding="utf-8"?><testsuites package="tslint">';
 
         if (failures.length !== 0) {
@@ -76,6 +76,24 @@ export class Formatter extends AbstractFormatter {
             }
         }
 
+        if (fileNames !== undefined && fileNames.length !== 0) {
+            // Filter out files which have had a failure associated with them.
+            const filteredFileNames = fileNames.filter(fileName => {
+                for (const failure of failures) {
+                    if (fileName === failure.getFileName()) {
+                        return false;
+                    }
+                }
+                return true;
+            });
+
+            for (const fileName of filteredFileNames) {
+                output += `<testsuite name="${this.escapeXml(fileName)}" errors="0">`;
+                output += `<testcase name="${this.escapeXml(fileName)}" />`;
+                output += `</testsuite>`;
+            }
+        }
+
         output += "</testsuites>";
         return output;
     }

test/formatters/junitFormatterTests.ts

@@ -106,14 +106,24 @@ describe("JUnit Formatter", () => {
                 </testsuite>
             </testsuites>`.replace(/>\s+/g, ">"); // Remove whitespace between tags;
 
-        assert.equal(formatter.format(failures), expectedResult);
+        assert.equal(formatter.format(failures, [], [TEST_FILE_1, TEST_FILE_2]), expectedResult);
     });
 
     it("handles no failures", () => {
-        const result = formatter.format([]);
-        assert.deepEqual(
-            result,
-            '<?xml version="1.0" encoding="utf-8"?><testsuites package="tslint"></testsuites>',
-        );
+        const result = formatter.format([], [], ["test1.ts", "test2.ts", "test3.ts"]);
+        const expectedResult = `<?xml version="1.0" encoding="utf-8"?>
+            <testsuites package="tslint">
+                <testsuite name="test1.ts" errors="0">
+                    <testcase name="test1.ts" />
+                </testsuite>
+                <testsuite name="test2.ts" errors="0">
+                    <testcase name="test2.ts" />
+                </testsuite>
+                <testsuite name="test3.ts" errors="0">
+                    <testcase name="test3.ts" />
+                </testsuite>
+            </testsuites>`.replace(/>\s+/g, ">");
+
+        assert.equal(result, expectedResult);
     });
 });