add more debug files to the tests

Author: liufengyun

tests/debug/for.scala

@@ -0,0 +1,16 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+     val b = 8 * 9  // [break] [step: f()]
+     f()            // [step: val a]
+     20 + b
+     print(b)
+  }
+
+  def f(): Unit = {
+    val a = for (i <- 1 to 5; j <- 10 to 20)        // [cont]
+              yield (i, j)      // Error: incorrect reaching this line
+
+    for (i <- 1 to 5; j <- 10 to 20)
+      println(i + j)           // TODO: i is renamed to i$2 --> reduce debuggability
+  }
+}

tests/debug/function.scala

@@ -0,0 +1,14 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    val a = 1 + 2
+    val b = a * 9        // [break] [step: plus] [step: c = plus]
+    val plus = (x: Int, y: Int) => {    // [cont: x * x]
+      val a = x * x                     // [break] [step: y * y]
+      val b = y * y                     // [step: a + b]
+      a + b                             // [next] [next]
+    }
+    val c = plus(a, b)   // [next: print]
+    print(c)             // [cont]
+  }
+
+}

tests/debug/method.scala

@@ -0,0 +1,14 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    val a = 1 + 2        // [break] [step: a * 9]
+    val b = a * 9        // [step: plus]
+    val c = plus(a, b)   // [step: x * x]
+    print(c)
+  }
+
+  def plus(x: Int, y: Int) = {
+    val a = x * x               // [step: y * y]
+    val b = y * y               // [step: a + b]
+    a + b                       // [step: plus] [step: print] [cont]
+  }
+}

tests/debug/nested-method.scala

@@ -0,0 +1,15 @@
+object Test {
+   def main(args: Array[String]): Unit = {
+     val a = 1 + 2     // [break] [step: a * 9]
+     val b = a * 9     // [step: plus] [step: x * x]
+
+     def plus(x: Int, y: Int) = {
+       val a = x * x               // [step: y * y]
+       val b = y * y               // [step: a + b]
+       a + b                       // [step: plus]
+     }
+
+     val c = plus(a, b)            // [step: print] [cont]
+     print(c)
+  }
+}

tests/debug/sequence.scala

@@ -0,0 +1,11 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    var a = 1 + 2     // [break] [step: a + 3]
+    a = a + 3         // [step: 4 + 5]
+    a = 4 + 5         // [step: a * 8]
+    a = a * 8         // [step: 9 * 9]
+    a = 9 * 9         // [step: 34 * 23]
+    a = 34 * 23       // [step: print]
+    print(a)          // [cont]
+  }
+}

tests/debug/tailrec.scala

@@ -0,0 +1,17 @@
+object Test {
+  def fact(x: Int): Int = {
+    if (x == 0)
+      1
+    else
+      x * fact(x - 1) // TODO: incorrect this line when x = 0
+  }
+
+
+   def main(args: Array[String]): Unit = {
+     val a = 1 + 2
+     val b = a * 9     // [break] [step: fact]
+     val c = fact(a)   // [step: x == 0] [step: fact(x - 1)] [step: x == 0] [cont]
+     fact(0)           // [break] [step: x == 0] [step: 1] [step: fact(x - 1)] [step: print]
+     print(c)          // [cont]
+  }
+}