1package humanize
2
3import (
4	"math/big"
5	"testing"
6)
7
8func TestBigByteParsing(t *testing.T) {
9	tests := []struct {
10		in  string
11		exp uint64
12	}{
13		{"42", 42},
14		{"42MB", 42000000},
15		{"42MiB", 44040192},
16		{"42mb", 42000000},
17		{"42mib", 44040192},
18		{"42MIB", 44040192},
19		{"42 MB", 42000000},
20		{"42 MiB", 44040192},
21		{"42 mb", 42000000},
22		{"42 mib", 44040192},
23		{"42 MIB", 44040192},
24		{"42.5MB", 42500000},
25		{"42.5MiB", 44564480},
26		{"42.5 MB", 42500000},
27		{"42.5 MiB", 44564480},
28		// No need to say B
29		{"42M", 42000000},
30		{"42Mi", 44040192},
31		{"42m", 42000000},
32		{"42mi", 44040192},
33		{"42MI", 44040192},
34		{"42 M", 42000000},
35		{"42 Mi", 44040192},
36		{"42 m", 42000000},
37		{"42 mi", 44040192},
38		{"42 MI", 44040192},
39		{"42.5M", 42500000},
40		{"42.5Mi", 44564480},
41		{"42.5 M", 42500000},
42		{"42.5 Mi", 44564480},
43		{"1,005.03 MB", 1005030000},
44		// Large testing, breaks when too much larger than
45		// this.
46		{"12.5 EB", uint64(12.5 * float64(EByte))},
47		{"12.5 E", uint64(12.5 * float64(EByte))},
48		{"12.5 EiB", uint64(12.5 * float64(EiByte))},
49	}
50
51	for _, p := range tests {
52		got, err := ParseBigBytes(p.in)
53		if err != nil {
54			t.Errorf("Couldn't parse %v: %v", p.in, err)
55		} else {
56			if got.Uint64() != p.exp {
57				t.Errorf("Expected %v for %v, got %v",
58					p.exp, p.in, got)
59			}
60		}
61	}
62}
63
64func TestBigByteErrors(t *testing.T) {
65	got, err := ParseBigBytes("84 JB")
66	if err == nil {
67		t.Errorf("Expected error, got %v", got)
68	}
69	got, err = ParseBigBytes("")
70	if err == nil {
71		t.Errorf("Expected error parsing nothing")
72	}
73}
74
75func bbyte(in uint64) string {
76	return BigBytes((&big.Int{}).SetUint64(in))
77}
78
79func bibyte(in uint64) string {
80	return BigIBytes((&big.Int{}).SetUint64(in))
81}
82
83func TestBigBytes(t *testing.T) {
84	testList{
85		{"bytes(0)", bbyte(0), "0 B"},
86		{"bytes(1)", bbyte(1), "1 B"},
87		{"bytes(803)", bbyte(803), "803 B"},
88		{"bytes(999)", bbyte(999), "999 B"},
89
90		{"bytes(1024)", bbyte(1024), "1.0 kB"},
91		{"bytes(1MB - 1)", bbyte(MByte - Byte), "1000 kB"},
92
93		{"bytes(1MB)", bbyte(1024 * 1024), "1.0 MB"},
94		{"bytes(1GB - 1K)", bbyte(GByte - KByte), "1000 MB"},
95
96		{"bytes(1GB)", bbyte(GByte), "1.0 GB"},
97		{"bytes(1TB - 1M)", bbyte(TByte - MByte), "1000 GB"},
98
99		{"bytes(1TB)", bbyte(TByte), "1.0 TB"},
100		{"bytes(1PB - 1T)", bbyte(PByte - TByte), "999 TB"},
101
102		{"bytes(1PB)", bbyte(PByte), "1.0 PB"},
103		{"bytes(1PB - 1T)", bbyte(EByte - PByte), "999 PB"},
104
105		{"bytes(1EB)", bbyte(EByte), "1.0 EB"},
106		// Overflows.
107		// {"bytes(1EB - 1P)", Bytes((KByte*EByte)-PByte), "1023EB"},
108
109		{"bytes(0)", bibyte(0), "0 B"},
110		{"bytes(1)", bibyte(1), "1 B"},
111		{"bytes(803)", bibyte(803), "803 B"},
112		{"bytes(1023)", bibyte(1023), "1023 B"},
113
114		{"bytes(1024)", bibyte(1024), "1.0 KiB"},
115		{"bytes(1MB - 1)", bibyte(MiByte - IByte), "1024 KiB"},
116
117		{"bytes(1MB)", bibyte(1024 * 1024), "1.0 MiB"},
118		{"bytes(1GB - 1K)", bibyte(GiByte - KiByte), "1024 MiB"},
119
120		{"bytes(1GB)", bibyte(GiByte), "1.0 GiB"},
121		{"bytes(1TB - 1M)", bibyte(TiByte - MiByte), "1024 GiB"},
122
123		{"bytes(1TB)", bibyte(TiByte), "1.0 TiB"},
124		{"bytes(1PB - 1T)", bibyte(PiByte - TiByte), "1023 TiB"},
125
126		{"bytes(1PB)", bibyte(PiByte), "1.0 PiB"},
127		{"bytes(1PB - 1T)", bibyte(EiByte - PiByte), "1023 PiB"},
128
129		{"bytes(1EiB)", bibyte(EiByte), "1.0 EiB"},
130		// Overflows.
131		// {"bytes(1EB - 1P)", bibyte((KIByte*EIByte)-PiByte), "1023EB"},
132
133		{"bytes(5.5GiB)", bibyte(5.5 * GiByte), "5.5 GiB"},
134
135		{"bytes(5.5GB)", bbyte(5.5 * GByte), "5.5 GB"},
136	}.validate(t)
137}
138
139func TestVeryBigBytes(t *testing.T) {
140	b, _ := (&big.Int{}).SetString("15347691069326346944512", 10)
141	s := BigBytes(b)
142	if s != "15 ZB" {
143		t.Errorf("Expected 15 ZB, got %v", s)
144	}
145	s = BigIBytes(b)
146	if s != "13 ZiB" {
147		t.Errorf("Expected 13 ZiB, got %v", s)
148	}
149
150	b, _ = (&big.Int{}).SetString("15716035654990179271180288", 10)
151	s = BigBytes(b)
152	if s != "16 YB" {
153		t.Errorf("Expected 16 YB, got %v", s)
154	}
155	s = BigIBytes(b)
156	if s != "13 YiB" {
157		t.Errorf("Expected 13 YiB, got %v", s)
158	}
159}
160
161func TestVeryVeryBigBytes(t *testing.T) {
162	b, _ := (&big.Int{}).SetString("16093220510709943573688614912", 10)
163	s := BigBytes(b)
164	if s != "16093 YB" {
165		t.Errorf("Expected 16093 YB, got %v", s)
166	}
167	s = BigIBytes(b)
168	if s != "13312 YiB" {
169		t.Errorf("Expected 13312 YiB, got %v", s)
170	}
171}
172
173func TestParseVeryBig(t *testing.T) {
174	tests := []struct {
175		in  string
176		out string
177	}{
178		{"16 ZB", "16000000000000000000000"},
179		{"16 ZiB", "18889465931478580854784"},
180		{"16.5 ZB", "16500000000000000000000"},
181		{"16.5 ZiB", "19479761741837286506496"},
182		{"16 Z", "16000000000000000000000"},
183		{"16 Zi", "18889465931478580854784"},
184		{"16.5 Z", "16500000000000000000000"},
185		{"16.5 Zi", "19479761741837286506496"},
186
187		{"16 YB", "16000000000000000000000000"},
188		{"16 YiB", "19342813113834066795298816"},
189		{"16.5 YB", "16500000000000000000000000"},
190		{"16.5 YiB", "19947276023641381382651904"},
191		{"16 Y", "16000000000000000000000000"},
192		{"16 Yi", "19342813113834066795298816"},
193		{"16.5 Y", "16500000000000000000000000"},
194		{"16.5 Yi", "19947276023641381382651904"},
195	}
196
197	for _, test := range tests {
198		x, err := ParseBigBytes(test.in)
199		if err != nil {
200			t.Errorf("Error parsing %q: %v", test.in, err)
201			continue
202		}
203
204		if x.String() != test.out {
205			t.Errorf("Expected %q for %q, got %v", test.out, test.in, x)
206		}
207	}
208}
209
210func BenchmarkParseBigBytes(b *testing.B) {
211	for i := 0; i < b.N; i++ {
212		ParseBigBytes("16.5 Z")
213	}
214}
215
216func BenchmarkBigBytes(b *testing.B) {
217	for i := 0; i < b.N; i++ {
218		bibyte(16.5 * GByte)
219	}
220}
221