Fix, skipped mutations should count towards total mutations not

duplicated mutations

cmd/go-mutesting/main.go

@@ -152,6 +152,20 @@ type mutationStats struct {
 	skipped    int
 }
 
+func (ms *mutationStats) Score() float64 {
+	total := ms.Total()
+
+	if total == 0 {
+		return 0.0
+	}
+
+	return float64(ms.passed) / float64(total)
+}
+
+func (ms *mutationStats) Total() int {
+	return ms.passed + ms.failed + ms.skipped
+}
+
 func mainCmd(args []string) int {
 	var opts = &options{}
 	var mutationBlackList = map[string]struct{}{}
@@ -317,7 +331,7 @@ MUTATOR:
 	}
 
 	if !opts.Exec.NoExec {
-		fmt.Printf("The mutation score is %f (%d passed, %d failed, %d duplicated, %d skipped, total is %d)\n", float64(stats.passed)/float64(stats.passed+stats.failed), stats.passed, stats.failed, stats.duplicated, stats.skipped, stats.passed+stats.failed+stats.duplicated+stats.skipped)
+		fmt.Printf("The mutation score is %f (%d passed, %d failed, %d duplicated, %d skipped, total is %d)\n", stats.Score(), stats.passed, stats.failed, stats.duplicated, stats.skipped, stats.Total())
 	} else {
 		fmt.Println("Cannot do a mutation testing summary since no exec command was executed.")
 	}

cmd/go-mutesting/main_test.go

@@ -15,7 +15,7 @@ func TestMain(t *testing.T) {
 		"../../example",
 		[]string{"--debug", "--exec-timeout", "1"},
 		returnOk,
-		"The mutation score is 0.538462 (7 passed, 6 failed, 9 duplicated, 0 skipped, total is 22)",
+		"The mutation score is 0.538462 (7 passed, 6 failed, 9 duplicated, 0 skipped, total is 13)",
 	)
 }
 
@@ -25,7 +25,7 @@ func TestMainRecursive(t *testing.T) {
 		"../../example",
 		[]string{"--debug", "--exec-timeout", "1", "./..."},
 		returnOk,
-		"The mutation score is 0.571429 (8 passed, 6 failed, 9 duplicated, 0 skipped, total is 23)",
+		"The mutation score is 0.571429 (8 passed, 6 failed, 9 duplicated, 0 skipped, total is 14)",
 	)
 }
 
@@ -35,7 +35,7 @@ func TestMainFromOtherDirectory(t *testing.T) {
 		"../..",
 		[]string{"--debug", "--exec-timeout", "1", "github.com/zimmski/go-mutesting/example"},
 		returnOk,
-		"The mutation score is 0.538462 (7 passed, 6 failed, 9 duplicated, 0 skipped, total is 22)",
+		"The mutation score is 0.538462 (7 passed, 6 failed, 9 duplicated, 0 skipped, total is 13)",
 	)
 }