added the new evolved.depth function

develop/ROADMAP.md

@@ -9,8 +9,7 @@
 
 ## Thoughts
 
-- We can return deferred status from modifying operations and spawn/clone methods.
-- We should have a way to not copy components on deferred spawn/clone.
+- We should have a way to not copy components on deferred spawn/clone
 
 ## Known Issues
 

develop/all.lua

@@ -1,6 +1,7 @@
 require 'develop.testing.build_tests'
 require 'develop.testing.cancel_tests'
 require 'develop.testing.clone_tests'
+require 'develop.testing.depth_tests'
 require 'develop.testing.destroy_tests'
 require 'develop.testing.locate_tests'
 require 'develop.testing.main_tests'

develop/testing/depth_tests.lua

@@ -0,0 +1,65 @@
+local evo = require 'evolved'
+
+do
+    assert(evo.depth() == 0)
+
+    assert(evo.defer())
+    assert(evo.depth() == 1)
+
+    assert(not evo.defer())
+    assert(evo.depth() == 2)
+
+    assert(not evo.cancel())
+    assert(evo.depth() == 1)
+
+    assert(evo.cancel())
+    assert(evo.depth() == 0)
+end
+
+do
+    assert(evo.depth() == 0)
+
+    assert(evo.defer())
+    assert(evo.depth() == 1)
+
+    assert(not evo.defer())
+    assert(evo.depth() == 2)
+
+    assert(not evo.commit())
+    assert(evo.depth() == 1)
+
+    assert(evo.commit())
+    assert(evo.depth() == 0)
+end
+
+do
+    assert(evo.depth() == 0)
+
+    assert(evo.defer())
+    assert(evo.depth() == 1)
+
+    assert(not evo.defer())
+    assert(evo.depth() == 2)
+
+    assert(not evo.cancel())
+    assert(evo.depth() == 1)
+
+    assert(evo.commit())
+    assert(evo.depth() == 0)
+end
+
+do
+    assert(evo.depth() == 0)
+
+    assert(evo.defer())
+    assert(evo.depth() == 1)
+
+    assert(not evo.defer())
+    assert(evo.depth() == 2)
+
+    assert(not evo.commit())
+    assert(evo.depth() == 1)
+
+    assert(evo.cancel())
+    assert(evo.depth() == 0)
+end