(import (srfi 64)
        (scheme base)
        (par piece-table))

;; https://srfi.schemers.org/srfi-64/srfi-64.html


(test-begin "index")
  (define table (make-piece-table "HOLA"))
  (test-equal #\H (piece-table-index table 0))
  (test-equal #\O (piece-table-index table 1))
  (test-equal #\L (piece-table-index table 2))
  (test-equal #\A (piece-table-index table 3))
(test-end "index")

(test-begin "length")
  (define table (make-piece-table "HOLA"))
  (test-equal 4 (piece-table-text-length table))
(test-end "length")

(test-begin "insert")
  (define table (make-piece-table "HOLA"))
  (piece-table-insert! table 4 "9" 'normal)
  (test-equal #\9 (piece-table-index table 4))
  (piece-table-insert! table 5 "0" 'normal)
  (test-equal #\0 (piece-table-index table 5))
  (test-equal "HOLA90" (piece-table->string table))
  (piece-table-insert! table 5 "1" 'normal)
  (test-equal "HOLA910" (piece-table->string table))
(test-end "insert")

(test-begin "substring")
  (parameterize ((add-buffer-length 10))
    (define table (make-piece-table "1234567890"))
    (test-equal  "1234567890" (piece-table-substring table 0 10))
    (test-equal  "67890" (piece-table-substring table 5 10))
    (piece-table-insert! table 6 "X" 'normal)
    (test-equal  "6X78" (piece-table-substring table 5 9)))
(test-end "substring")

(test-begin "insert-newlines")
  (parameterize ((add-buffer-length 10))
    (define table (make-piece-table "HOLA\nADIOS"))
    (piece-table-insert! table 4 "\nHABLAMOS" 'normal)
    (test-equal "HOLA\nHABLAMOS\nADIOS" (piece-table->string table))
    (test-equal (piece-table-line table 1) "HABLAMOS"))
  ;; TODO: test line iteration functions
(test-end "insert-newlines")

(test-begin "delete")
  (define table (make-piece-table "HOLA SOY EKAITZ"))
  (piece-table-delete! table 4 1)
  (test-equal "HOLASOY EKAITZ" (piece-table->string table))
  (piece-table-delete! table 0 1)
  (test-equal "OLASOY EKAITZ" (piece-table->string table))
  (piece-table-delete! table 12 1)
  (test-equal "OLASOY EKAIT" (piece-table->string table))
(test-end "delete")

(test-begin "for-each")
  (define table (make-piece-table "12346890"))
  (piece-table-insert! table 4 "5" 'normal)
  (test-equal "123456890" (piece-table->string table))
  (piece-table-insert! table 6 "7" 'normal)
  (test-equal "1234567890" (piece-table->string table))
  (piece-table-for-each table
                        (lambda (c i p)
                          (test-equal c (string-ref "1234567890" i)))
                        0
                        10)
(test-end "for-each")

(test-begin "find")
  (define table (make-piece-table "1234567890"))
  (test-equal 8 (piece-table-find table #\9 0))
(test-end "find")