Fix allow break in test body regression (#38)

* Fix allow break in test body regression

* Silence UnnamedBreak warning

* Use push/pop pragma to silence UnnamedBreak warning

tests/tunittest.nim

@@ -59,7 +59,7 @@ suite "PR #36":
   test "test body":
     server = new(string)
     server[] = "hello"
-    
+
 #------------------------------------------------------------------------------
 # Regular tests
 #------------------------------------------------------------------------------
@@ -227,4 +227,14 @@ when defined(testing):
 
 # Also supposed to work outside tests:
 check 1 == 1
-      
+
+suite "break should works inside test body":
+  var number: int = 0
+  test "step one":
+    number = 2
+  test "step two":
+    if number == 2:
+      break
+    number = 3
+  test "step three":
+    check number == 2

unittest2.nim

@@ -1110,14 +1110,19 @@ template runtimeTest*(nameParam: string, body: untyped) =
       fail()
 
     template failingOnExceptions(prefix: string, code: untyped): untyped =
+      when NimMajor>=2:
+        {.push warning[UnnamedBreak]:off.}
       try:
-        code
+        block:
+          code
       except CatchableError as e:
         prefix.fail("error", e)
       except Defect as e: # This may or may not work dependings on --panics
         prefix.fail("defect", e)
       except Exception as e:
         prefix.fail("exception that may cause undefined behavior", e)
+      when NimMajor>=2:
+        {.pop.}
 
     failingOnExceptions("[setup] "):
       when declared(testSetupIMPLFlag): testSetupIMPL()
@@ -1145,7 +1150,6 @@ template runtimeTest*(nameParam: string, body: untyped) =
     else:
       runDirect(instance)
 
-
 template staticTest*(nameParam: string, body: untyped) =
   ## Similar to `test` but runs only at compiletime, no matter the
   ## `unittest2Static` flag