feat: diff parser with multiple outputs in one case

examples/compile/error

@@ -1 +1 @@
-Subproject commit 2593e79505a93042d308c5fc355dba671dd4fdba
+Subproject commit 4e5fab93e5a0ce67c8f40fef1e8f4cab7018fc5d

examples/compile/success

@@ -1 +1 @@
-Subproject commit 638e9f661092d39daaf6e1ffc8ba5998fc56c96a
+Subproject commit 1512cb5f20473a598d7504a08dacff3d6406b983

examples/diff/basic

@@ -1 +1 @@
-Subproject commit d8d66fb5b47b5e79e08532da31d397a5d461f087
+Subproject commit af990327ab095c22a383448ad70d915f8d10490b

examples/diff/complex

@@ -1 +1 @@
-Subproject commit fc774118794a5c5ec0b88863ba6c8492e5b13f89
+Subproject commit ac7a2fc912fb51af156cd4babb7e72148ebe1c14

internal/parsers/diff/parser.go

@@ -20,9 +20,12 @@ const (
 
 type Conf struct {
 	Cases []struct {
-		Score            int
-		StdoutPath       string
-		IgnoreWhitespace bool
+		Outputs []struct {
+			Score            int
+			FileName         string
+			AnswerPath       string
+			IgnoreWhitespace bool
+		}
 	}
 }
 
@@ -43,35 +46,31 @@ func (*Diff) Run(results []stage.ExecutorResult, confAny any) (
 	for i, caseConf := range conf.Cases {
 		result := results[i]
 		score := 0
-		var comment string
+		comment := ""
+		for _, output := range caseConf.Outputs {
+			answer, err := os.ReadFile(output.AnswerPath)
+			if err != nil {
+				return nil, true, err
+			}
 
-		stdout, err := os.ReadFile(caseConf.StdoutPath)
-		if err != nil {
-			return nil, true, err
-		}
+			// If no difference, assign score
+			if compareChars(string(answer), result.Files[output.FileName], output.IgnoreWhitespace) {
+				score += output.Score
+			} else {
+				// Convert answer to string and split by lines
+				stdoutLines := strings.Split(string(answer), "\n")
+				resultLines := strings.Split(result.Files[output.FileName], "\n")
 
-		comment = fmt.Sprintf(
-			"executor status: run time: %d ns, memory: %d bytes\n",
-			result.RunTime, result.Memory,
-		)
+				// Generate Myers diff
+				diffOps := myersDiff(stdoutLines, resultLines)
 
-		// If no difference, assign score
-		if compareChars(string(stdout), result.Files["stdout"], caseConf.IgnoreWhitespace) {
-			score = caseConf.Score
-		} else {
-			// Convert stdout to string and split by lines
-			stdoutLines := strings.Split(string(stdout), "\n")
-			resultLines := strings.Split(result.Files["stdout"], "\n")
-
-			// Generate Myers diff
-			diffOps := myersDiff(stdoutLines, resultLines)
-
-			// Generate diff block with surrounding context
-			diffOutput := generateDiffWithContext(stdoutLines, resultLines, diffOps)
-			comment += fmt.Sprintf(
-				"difference found:\n```diff\n%s```",
-				diffOutput,
-			)
+				// Generate diff block with surrounding context
+				diffOutput := generateDiffWithContext(stdoutLines, resultLines, diffOps)
+				comment += fmt.Sprintf(
+					"difference found in %s:\n```diff\n%s```\n",
+					output.FileName, diffOutput,
+				)
+			}
 		}
 
 		res = append(res, stage.ParserResult{