add wml unit tests two and three

- test two tests a basic property of events
- test three tests unit placement on the map in
  case of a collision

data/test/scenarios/unit_test_2.cfg

@@ -0,0 +1,29 @@
+# The purpose of this test is to check that a First in, First out
+# order of events is being respected.
+#
+# A variable X is set to 1 during prestart, and just after
+# a start event is registered which would set it to 0.
+#
+# Within the scenario tag, a start event is also registered
+# to return (X == 1).
+#
+# If the "nested" event runs before the outer level start event,
+# we fail the test. The outer event should run first because
+# all of the events in [scenario] are registered before any
+# of them is executed.
+
+{GENERIC_UNIT_TEST "unit_test_2" (
+    [event]
+        name = prestart
+        {VARIABLE X 1}
+        [event]
+            name = start
+            {VARIABLE X 0}
+        [/event]
+    [/event]
+    [event]
+        name = start
+        {RETURN ({VARIABLE_CONDITIONAL X equals 1})}
+    [/event]
+)}
+

data/test/scenarios/unit_test_3.cfg

@@ -0,0 +1,68 @@
+# The purpose of this test is to check that units spawned on
+# an occupied hex are placed at the nearest available vacant hex.
+#
+# Six blue grunts are spawned, one at 3,4 and five more at adjacent
+# hexes, leaving the southern hex 3,5 open. 
+# Then a red grunt is spawned at 3,4. 
+# We try to store a unit at 3,5, assert that we find one, and that 
+# it is red.
+
+{GENERIC_UNIT_TEST "unit_test_3" (
+    [event]
+        name = start
+        [unit]
+            x = 3 
+            y = 4
+            type = Orcish Grunt
+            side = 2
+        [/unit]
+        [unit]
+            x = 3 
+            y = 3
+            type = Orcish Grunt
+            side = 2
+        [/unit]
+        [unit]
+            x = 4 
+            y = 3
+            type = Orcish Grunt
+            side = 2
+        [/unit]
+        [unit]
+            x = 4 
+            y = 4
+            type = Orcish Grunt
+            side = 2
+        [/unit]
+
+        [unit]
+            x = 2 
+            y = 3
+            type = Orcish Grunt
+            side = 2
+        [/unit]
+        [unit]
+            x = 2
+            y = 4
+            type = Orcish Grunt
+            side = 2
+        [/unit]
+        [unit]
+            x = 3 
+            y = 4
+            type = Orcish Grunt
+            side = 1
+        [/unit]
+
+        [store_unit]
+            variable = test
+            [filter]
+                x = 3
+                y = 5
+            [/filter]
+        [/store_unit]
+        {ASSERT ({VARIABLE_CONDITIONAL test.length equals 1})}
+        {RETURN ({VARIABLE_CONDITIONAL test.side equals 1})}
+    [/event]
+)}
+