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-rw-r--r--modules/util/truncate_test.go46
1 files changed, 46 insertions, 0 deletions
diff --git a/modules/util/truncate_test.go b/modules/util/truncate_test.go
new file mode 100644
index 0000000..dfe1230
--- /dev/null
+++ b/modules/util/truncate_test.go
@@ -0,0 +1,46 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package util
+
+import (
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+)
+
+func TestSplitString(t *testing.T) {
+ type testCase struct {
+ input string
+ n int
+ leftSub string
+ ellipsis string
+ }
+
+ test := func(tc []*testCase, f func(input string, n int) (left, right string)) {
+ for _, c := range tc {
+ l, r := f(c.input, c.n)
+ if c.ellipsis != "" {
+ assert.Equal(t, c.leftSub+c.ellipsis, l, "test split %q at %d, expected leftSub: %q", c.input, c.n, c.leftSub)
+ assert.Equal(t, c.ellipsis+c.input[len(c.leftSub):], r, "test split %s at %d, expected rightSub: %q", c.input, c.n, c.input[len(c.leftSub):])
+ } else {
+ assert.Equal(t, c.leftSub, l, "test split %q at %d, expected leftSub: %q", c.input, c.n, c.leftSub)
+ assert.Empty(t, r, "test split %q at %d, expected rightSub: %q", c.input, c.n, "")
+ }
+ }
+ }
+
+ tc := []*testCase{
+ {"abc123xyz", 0, "", utf8Ellipsis},
+ {"abc123xyz", 1, "", utf8Ellipsis},
+ {"abc123xyz", 4, "a", utf8Ellipsis},
+ {"啊bc123xyz", 4, "", utf8Ellipsis},
+ {"啊bc123xyz", 6, "啊", utf8Ellipsis},
+ {"啊bc", 5, "啊bc", ""},
+ {"啊bc", 6, "啊bc", ""},
+ {"abc\xef\x03\xfe", 3, "", asciiEllipsis},
+ {"abc\xef\x03\xfe", 4, "a", asciiEllipsis},
+ {"\xef\x03", 1, "\xef\x03", ""},
+ }
+ test(tc, SplitStringAtByteN)
+}