renames fixtures as testdata to avoid spurious dependencies (#359)

testdata/unreachable-code.go

@@ -0,0 +1,37 @@
+package fixtures
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+func foo() int {
+	log.Fatalf("%s", "About to fail") // ignore
+	return 0                          // MATCH /unreachable code after this statement/
+	return 1
+	Println("unreachable")
+}
+
+func f() {
+	fmt.Println("Hello, playground")
+	if true {
+		return // MATCH /unreachable code after this statement/
+		Println("unreachable")
+		os.Exit(2) // ignore
+		Println("also unreachable")
+	}
+	return // MATCH /unreachable code after this statement/
+	fmt.Println("Bye, playground")
+}
+
+func g() {
+	fmt.Println("Hello, playground")
+	if true {
+		return // ignore if next stmt is labeled
+	label:
+		os.Exit(2) // ignore
+	}
+
+	fmt.Println("Bye, playground")
+}