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[bytom/vapor.git] / vendor / golang.org / x / text / internal / colltab / trie_test.go

diff --git a/vendor/golang.org/x/text/internal/colltab/trie_test.go b/vendor/golang.org/x/text/internal/colltab/trie_test.go
new file mode 100644 (file)
index 0000000..b056a81
--- /dev/null
+++ b/vendor/golang.org/x/text/internal/colltab/trie_test.go
@@ -0,0 +1,106 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package colltab
+
+import (
+       "testing"
+)
+
+// We take the smallest, largest and an arbitrary value for each
+// of the UTF-8 sequence lengths.
+var testRunes = []rune{
+       0x01, 0x0C, 0x7F, // 1-byte sequences
+       0x80, 0x100, 0x7FF, // 2-byte sequences
+       0x800, 0x999, 0xFFFF, // 3-byte sequences
+       0x10000, 0x10101, 0x10FFFF, // 4-byte sequences
+       0x200, 0x201, 0x202, 0x210, 0x215, // five entries in one sparse block
+}
+
+// Test cases for illegal runes.
+type trietest struct {
+       size  int
+       bytes []byte
+}
+
+var tests = []trietest{
+       // illegal runes
+       {1, []byte{0x80}},
+       {1, []byte{0xFF}},
+       {1, []byte{t2, tx - 1}},
+       {1, []byte{t2, t2}},
+       {2, []byte{t3, tx, tx - 1}},
+       {2, []byte{t3, tx, t2}},
+       {1, []byte{t3, tx - 1, tx}},
+       {3, []byte{t4, tx, tx, tx - 1}},
+       {3, []byte{t4, tx, tx, t2}},
+       {1, []byte{t4, t2, tx, tx - 1}},
+       {2, []byte{t4, tx, t2, tx - 1}},
+
+       // short runes
+       {0, []byte{t2}},
+       {0, []byte{t3, tx}},
+       {0, []byte{t4, tx, tx}},
+
+       // we only support UTF-8 up to utf8.UTFMax bytes (4 bytes)
+       {1, []byte{t5, tx, tx, tx, tx}},
+       {1, []byte{t6, tx, tx, tx, tx, tx}},
+}
+
+func TestLookupTrie(t *testing.T) {
+       for i, r := range testRunes {
+               b := []byte(string(r))
+               v, sz := testTrie.lookup(b)
+               if int(v) != i {
+                       t.Errorf("lookup(%U): found value %#x, expected %#x", r, v, i)
+               }
+               if sz != len(b) {
+                       t.Errorf("lookup(%U): found size %d, expected %d", r, sz, len(b))
+               }
+       }
+       for i, tt := range tests {
+               v, sz := testTrie.lookup(tt.bytes)
+               if int(v) != 0 {
+                       t.Errorf("lookup of illegal rune, case %d: found value %#x, expected 0", i, v)
+               }
+               if sz != tt.size {
+                       t.Errorf("lookup of illegal rune, case %d: found size %d, expected %d", i, sz, tt.size)
+               }
+       }
+}
+
+// test data is taken from exp/collate/locale/build/trie_test.go
+var testValues = [832]uint32{
+       0x000c: 0x00000001,
+       0x007f: 0x00000002,
+       0x00c0: 0x00000003,
+       0x0100: 0x00000004,
+       0x0140: 0x0000000c, 0x0141: 0x0000000d, 0x0142: 0x0000000e,
+       0x0150: 0x0000000f,
+       0x0155: 0x00000010,
+       0x01bf: 0x00000005,
+       0x01c0: 0x00000006,
+       0x0219: 0x00000007,
+       0x027f: 0x00000008,
+       0x0280: 0x00000009,
+       0x02c1: 0x0000000a,
+       0x033f: 0x0000000b,
+}
+
+var testLookup = [640]uint16{
+       0x0e0: 0x05, 0x0e6: 0x06,
+       0x13f: 0x07,
+       0x140: 0x08, 0x144: 0x09,
+       0x190: 0x03,
+       0x1ff: 0x0a,
+       0x20f: 0x05,
+       0x242: 0x01, 0x244: 0x02,
+       0x248: 0x03,
+       0x25f: 0x04,
+       0x260: 0x01,
+       0x26f: 0x02,
+       0x270: 0x04, 0x274: 0x06,
+}
+
+var testTrie = Trie{testLookup[6*blockSize:], testValues[:], testLookup[:], testValues[:]}