fixes #1744

tests/vm/tstringnil.nim

@@ -0,0 +1,50 @@
+# bug #1744
+
+import macros
+
+type
+  SuiteTest = object
+    suiteName: string
+    suiteDesc: string
+    testName: string
+    testDesc: string
+    testBlock: PNimrodNode
+
+proc buildSuiteContents(suiteName, suiteDesc, suiteBloc: PNimrodNode): tuple[tests: seq[SuiteTest]]  {.compileTime.} =
+  var
+    tests:seq[SuiteTest] = @[]
+
+  for child in suiteBloc.children():
+    case $child[0].ident:
+    of "test":
+
+      var testObj = SuiteTest()
+      if suiteName.kind == nnkNilLit:
+        testObj.suiteName = nil
+      else:
+        testObj.suiteName = $suiteName
+      if suiteDesc.kind == nnkNilLit:
+        testObj.suiteDesc = nil
+      else:
+        testObj.suiteDesc = suiteDesc.strVal
+      testObj.testName = $child[1] # should not ever be nil
+      if child[2].kind == nnkNilLit:
+        testObj.testDesc = nil
+      else:
+        testObj.testDesc = child[2].strVal
+      testObj.testBlock = child[3][6]
+
+      tests.add(testObj)
+
+    else:
+      discard
+
+  return (tests: tests)
+ 
+macro suite(suiteName, suiteDesc: expr, suiteBloc: stmt): stmt {.immediate.} =
+  let contents = buildSuiteContents(suiteName, suiteDesc, suiteBloc)
+
+# Test above
+suite basics, "Description of such":
+  test(t5, nil):
+    assert false