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#| Copyright 2024 Peter McGoron
|
| 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.
|#
(import (mcgoron iterator string))
(let* ((str "")
(itr (string-iterator-start str)))
(test-group "empty-string"
(test-assert "iterator-at-start?" (iterator-at-start? itr))
(test-assert "iterator-at-end?" (iterator-at-end? itr))
(test-assert "iterator-advance 1" (not (iterator-advance itr 1)))
(test-assert "iterator-advance -1" (not (iterator-advance itr -1)))
(test "iterator->index" 0 (iterator->index itr))
(test-assert "iterator=?" (iterator=? itr (string-iterator-end str)))
(test-error "iterator-ref" (iterator-ref itr))))
(let* ((str "a")
(itr (string-iterator-start str))
(itr-from-itr (string-iterator-start itr)))
(test-group "non empty string"
(test-assert "iterator-at-start?" (iterator-at-start? itr))
(test-assert "iterator-at-end?" (not (iterator-at-end? itr)))
(test-assert (iterator=? itr itr-from-itr))
(test "iterator-ref 0" #\a (iterator-ref itr))
(test-assert "iterator-advance start -1" (not (iterator-advance itr -1)))
(let ((next-itr (iterator-advance itr 1)))
(test-assert "iterator? advanced" (iterator? next-itr))
(test-assert "iterator-at-end? advanced" (iterator-at-end? next-itr))
(test-assert "iterator=? end advanced"
(iterator=? next-itr (string-iterator-end str)))
(test-assert "iterator=? itr next-itr"
(not (iterator=? itr next-itr)))
(test-assert "iterator<? itr next-itr"
(iterator<? itr next-itr))
(test-assert "iterator=? itr previous"
(iterator=? itr (iterator-advance next-itr -1)))
(test "iterator->index next-itr" 1
(iterator->index next-itr))
(test-error "iterator-ref next-itr" (iterator-ref next-itr)))))
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