1 files changed, 69 insertions, 0 deletions
diff --git a/test/etap/062-kt-remove-leaves.t b/test/etap/062-kt-remove-leaves.t
new file mode 100755
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--- /dev/null
+++ b/test/etap/062-kt-remove-leaves.t
@@ -0,0 +1,69 @@
+#!/usr/bin/env escript
+%% -*- erlang -*-
+
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+%   http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+main(_) ->
+    test_util:init_code_path(),
+    etap:plan(6),
+    case (catch test()) of
+        ok ->
+            etap:end_tests();
+        Other ->
+            etap:diag(io_lib:format("Test died abnormally: ~p", [Other])),
+            etap:bail(Other)
+    end,
+    ok.
+
+test() ->
+    OneChild = [{0, {"1","foo",[{"1a", "bar", []}]}}],
+    TwoChildSibs = [{0, {"1","foo", [{"1a", "bar", []}, {"1b", "bar", []}]}}],
+    Stemmed = [{1, {"1a", "bar", [{"1aa", "bar", []}]}}],
+
+    etap:is(
+        {TwoChildSibs, []},
+        couch_key_tree:remove_leafs(TwoChildSibs, []),
+        "Removing no leaves has no effect on the tree."
+    ),
+
+    etap:is(
+        {TwoChildSibs, []},
+        couch_key_tree:remove_leafs(TwoChildSibs, [{0, "1"}]),
+        "Removing a non-existant branch has no effect."
+    ),
+
+    etap:is(
+        {OneChild, [{1, "1b"}]},
+        couch_key_tree:remove_leafs(TwoChildSibs, [{1, "1b"}]),
+        "Removing a leaf removes the leaf."
+    ),
+
+    etap:is(
+        {[], [{1, "1b"},{1, "1a"}]},
+        couch_key_tree:remove_leafs(TwoChildSibs, [{1, "1a"}, {1, "1b"}]),
+        "Removing all leaves returns an empty tree."
+    ),
+
+    etap:is(
+        {Stemmed, []},
+        couch_key_tree:remove_leafs(Stemmed, [{1, "1a"}]),
+        "Removing a non-existant node has no effect."
+    ),
+
+    etap:is(
+        {[], [{2, "1aa"}]},
+        couch_key_tree:remove_leafs(Stemmed, [{2, "1aa"}]),
+        "Removing the last leaf returns an empty tree."
+    ),
+
+    ok.