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Copy pathstrsplit_test.go
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317 lines (307 loc) · 5.69 KB
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package strsplit
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestChunk(t *testing.T) {
t.Parallel()
cases := []struct {
name string
s string
size int
n int
want []string
}{
{
name: "size zero",
s: "hello",
size: 0,
n: -1,
want: nil,
},
{
name: "n zero",
s: "hello",
size: 10,
n: 0,
want: nil,
},
{
name: "empty string",
s: "",
size: 5,
n: -1,
want: []string{},
},
{
name: "newline separator",
s: "hello\nworld\nverylongword",
size: 10,
n: -1,
want: []string{"hello", "world", "verylongwo", "rd"},
},
{
name: "n smaller",
s: "hello\nworld\nbella\nciao",
size: 7,
n: 2,
want: []string{"hello", "world"},
},
{
name: "n exact",
s: "hello\nworld\nbella\nciao",
size: 7,
n: 4,
want: []string{"hello", "world", "bella", "ciao"},
},
{
name: "n bigger",
s: "hello\nworld\nbella\nciao",
size: 7,
n: 5,
want: []string{"hello", "world", "bella", "ciao"},
},
{
name: "n large",
s: "hello\nworld\nbella\nciao",
size: 7,
n: 10,
want: []string{"hello", "world", "bella", "ciao"},
},
{
name: "n with reminder",
s: "helloworld\nbellaciao",
size: 5,
n: 3,
want: []string{"hello", "world", "bella"},
},
{
name: "multibyte rune wider than size", // regression: used to loop forever
s: "😀😀",
size: 3,
n: -1,
want: []string{"😀", "😀"},
},
{
name: "carriage return before newline",
s: "a\r\nb",
size: 10,
n: -1,
want: []string{"a", "b"},
},
{
name: "lone carriage return is not a boundary",
s: "a\rb",
size: 10,
n: -1,
want: []string{"a\rb"},
},
{
name: "blank lines are collapsed",
s: "a\n\n\nb",
size: 10,
n: -1,
want: []string{"a", "b"},
},
{
name: "whitespace only input",
s: " \n \t ",
size: 5,
n: -1,
want: []string{},
},
}
for _, tt := range cases {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
got := Chunk(tt.s, tt.size, tt.n)
require.Equal(t, tt.want, got)
})
}
}
func TestChunkLine(t *testing.T) {
t.Parallel()
cases := []struct {
name string
s string
size int
n int
want []string
}{
{
name: "size zero",
s: "hello",
size: 0,
n: -1,
want: nil,
},
{
name: "n zero",
s: "hello",
size: 10,
n: 0,
want: nil,
},
{
name: "empty string",
s: "",
size: 5,
n: -1,
want: []string{},
},
{
name: "exact division",
s: "helloworld",
size: 5,
n: -1,
want: []string{"hello", "world"},
},
{
name: "remainder chunk",
s: "helloworld!",
size: 5,
n: -1,
want: []string{"hello", "world", "!"},
},
{
name: "single character chunks",
s: "abc",
size: 1,
n: -1,
want: []string{"a", "b", "c"},
},
{
name: "size larger than string",
s: "hi",
size: 10,
n: -1,
want: []string{"hi"},
},
{
name: "split on space separator",
s: "hello world test",
size: 10,
n: -1,
want: []string{"hello", "world test"},
},
{
name: "split on tab separator",
s: "hello\tworld",
size: 10,
n: -1,
want: []string{"hello", "world"},
},
{
name: "split on newline separator",
s: "hello\nworld",
size: 10,
n: -1,
want: []string{"hello", "world"},
},
{
name: "split on punctuation",
s: "hello,world",
size: 10,
n: -1,
want: []string{"hello,", "world"},
},
{
name: "whitespace trimming",
s: " hello ",
size: 10,
n: -1,
want: []string{"hello"},
},
{
name: "size one with spaces",
s: "a b c d",
size: 1,
n: -1,
want: []string{"a", "b", "c", "d"},
},
{
name: "unicode split",
s: "Hello 世界 Hello 世界 Hello 世界", //nolint:gosmopolitan
size: 7,
n: -1,
want: []string{"Hello", "世界", "Hello", "世界", "Hello", "世界"}, //nolint:gosmopolitan
},
{
name: "n smaller",
s: "Hello 世界 Hello 世界 Hello 世界", //nolint:gosmopolitan
size: 7,
n: 3,
want: []string{"Hello", "世界", "Hello"}, //nolint:gosmopolitan
},
{
name: "n exact",
s: "Hello 世界 Hello 世界 Hello 世界", //nolint:gosmopolitan
size: 7,
n: 6,
want: []string{"Hello", "世界", "Hello", "世界", "Hello", "世界"}, //nolint:gosmopolitan
},
{
name: "n bigger",
s: "hello\nworld\nbella\nciao",
size: 7,
n: 5,
want: []string{"hello", "world", "bella", "ciao"},
},
{
name: "n smaller",
s: "helloworldbellaciao",
size: 5,
n: 2,
want: []string{"hello", "world"},
},
{
name: "multibyte leading rune wider than size", // regression: used to loop forever
s: "é",
size: 1,
n: -1,
want: []string{"é"},
},
{
name: "multibyte runes wider than size",
s: "😀😀",
size: 3,
n: -1,
want: []string{"😀", "😀"},
},
{
name: "whitespace only shorter than size", // regression: used to emit an empty chunk
s: " ",
size: 5,
n: -1,
want: []string{},
},
{
name: "whitespace only longer than size",
s: " ",
size: 2,
n: -1,
want: []string{},
},
{
name: "leading whitespace with small size",
s: " x",
size: 2,
n: -1,
want: []string{"x"},
},
{
name: "multibyte unicode space separator",
s: "ab\u2003cd", // U+2003 EM SPACE is a 3-byte whitespace rune
size: 6,
n: -1,
want: []string{"ab", "cd"},
},
}
for _, tt := range cases {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
got := ChunkLine(tt.s, tt.size, tt.n)
require.Equal(t, tt.want, got)
})
}
}