1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* __ *\
** ________ ___ / / ___ __ ____ Scala.js Test Suite **
** / __/ __// _ | / / / _ | __ / // __/ (c) 2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ |/_// /_\ \ http://scala-js.org/ **
** /____/\___/_/ |_/____/_/ | |__/ /____/ **
** |/____/ **
\* */
package scala.scalajs.testsuite.javalib
import org.scalajs.jasminetest.JasmineTest
import scala.scalajs.js
import java.lang.{Float => JFloat}
import scala.util.Try
object FloatTest extends JasmineTest {
describe("java.lang.Float") {
it("should provide proper `equals`") {
expect(Float.box(0.0f) == Float.box(-0.0f)).toBeTruthy
expect(Float.box(Float.NaN) == Float.box(Float.NaN)).toBeTruthy
}
it("hashCode") {
def hashCodeNotInlined(x: Any): Int = {
var y = x // do not inline
y.hashCode
}
def test(x: Float, expected: Int): Unit = {
expect(x.hashCode).toEqual(expected)
expect(hashCodeNotInlined(x)).toEqual(expected)
}
test(0.0f, 0)
test(-0.0f, 0)
test(1234.0f, 1234)
test(1.5f, 1073217536)
test(-54f, -54)
test(Float.MinPositiveValue, 916455424)
test(Float.MinValue, 670040063)
test(Float.MaxValue, -1477443585)
test(Float.NaN, 2146959360)
test(Float.PositiveInfinity, 2146435072)
test(Float.NegativeInfinity, -1048576)
}
it("should provide `toString` with integer values when an integer") {
expect(0.0f.toString).toEqual("0")
expect(-0.0f.toString).toEqual("0")
expect(Float.NaN.toString).toEqual("NaN")
expect(Float.PositiveInfinity.toString).toEqual("Infinity")
expect(Float.NegativeInfinity.toString).toEqual("-Infinity")
expect(5.0f.toString).toEqual("5")
expect(-5.0f.toString).toEqual("-5")
// We need to explicitly cut the string here, since floats are
// represented by doubles (but the literal is emitted as
// float). Therefore there may be some imprecision. This is
// documented as semantic difference.
expect(1.2f.toString.substring(0,3)).toEqual("1.2")
}
it("should parse strings") {
expect("0.0".toFloat).toEqual(0.0f)
expect("NaN".toFloat.isNaN).toBeTruthy
expect(Try("asdf".toFloat).isFailure).toBeTruthy
def test(s: String, v: Float): Unit = {
expect(JFloat.parseFloat(s)).toBeCloseTo(v)
expect(JFloat.valueOf(s).floatValue()).toBeCloseTo(v)
expect(new JFloat(s).floatValue()).toBeCloseTo(v)
}
test("0", 0.0f)
test("5.3", 5.3f)
test("127e2", 12700.0f)
test("127E-2", 1.27f)
test("1E+1", 10f)
test("-123.4", -123.4f)
test("65432.1", 65432.10f)
test("-87654.321", -87654.321f)
test("+.3f", 0.3f)
}
it("should reject invalid strings when parsing") {
def test(s: String): Unit =
expect(() => JFloat.parseFloat(s)).toThrow
test("4.3.5")
test("4e3.5")
test("hello world")
test("--4")
test("4E-3.2")
}
it("should provide `compareTo`") {
def compare(x: Float, y: Float): Int =
new JFloat(x).compareTo(new JFloat(y))
expect(compare(0.0f, 5.5f)).toBeLessThan(0)
expect(compare(10.5f, 10.2f)).toBeGreaterThan(0)
expect(compare(-2.1f, -1.0f)).toBeLessThan(0)
expect(compare(3.14f, 3.14f)).toEqual(0)
// From compareTo's point of view, NaN is equal to NaN
expect(compare(Float.NaN, Float.NaN)).toEqual(0)
}
it("should be a Comparable") {
def compare(x: Any, y: Any): Int =
x.asInstanceOf[Comparable[Any]].compareTo(y)
expect(compare(0.0f, 5.5f)).toBeLessThan(0)
expect(compare(10.5f, 10.2f)).toBeGreaterThan(0)
expect(compare(-2.1f, -1.0f)).toBeLessThan(0)
expect(compare(3.14f, 3.14f)).toEqual(0)
// From compareTo's point of view, NaN is equal to NaN
expect(compare(Float.NaN, Float.NaN)).toEqual(0)
}
it("should provide isInfinite - #515") {
expect(Float.PositiveInfinity.isInfinite).toBeTruthy
expect(Float.NegativeInfinity.isInfinite).toBeTruthy
expect((1f/0).isInfinite).toBeTruthy
expect((-1f/0).isInfinite).toBeTruthy
expect(0f.isInfinite).toBeFalsy
}
it("isNaN") {
def f(v: Float): Boolean = {
var v2 = v // do not inline
v2.isNaN
}
expect(f(Float.NaN)).toBeTruthy
expect(f(Float.PositiveInfinity)).toBeFalsy
expect(f(Float.NegativeInfinity)).toBeFalsy
expect(f(1f / 0)).toBeFalsy
expect(f(-1f / 0)).toBeFalsy
expect(f(0f)).toBeFalsy
expect(f(3f)).toBeFalsy
expect(f(-1.5f)).toBeFalsy
}
it("intBitsToFloat") {
def isZero(v: Float, neg: Boolean): Boolean = {
(v == 0.0f) && (1 / v == (
if (neg) Float.NegativeInfinity
else Float.PositiveInfinity))
}
import JFloat.{intBitsToFloat => f}
// Specials
expect(f(0x7f800000)).toEqual(Float.PositiveInfinity)
expect(f(0xff800000)).toEqual(Float.NegativeInfinity)
expect(isZero(f(0x00000000), false)).toBeTruthy
expect(isZero(f(0x80000000), true)).toBeTruthy
expect(f(0x7fc00000).isNaN).toBeTruthy // canonical NaN
// Non-canonical NaNs
expect(f(0x7f800001).isNaN).toBeTruthy // smallest positive NaN
expect(f(0x7f915ab5).isNaN).toBeTruthy // an arbitrary positive NaN
expect(f(0x7fffffff).isNaN).toBeTruthy // largest positive NaN
expect(f(0xff800001).isNaN).toBeTruthy // smallest negative NaN
expect(f(0xff915ab5).isNaN).toBeTruthy // an arbitrary negative NaN
expect(f(0xffffffff).isNaN).toBeTruthy // largest negative NaN
// Normal forms
expect(f(0x00800000)).toEqual(1.17549435e-38f) // smallest pos normal form
expect(f(0x7f7fffff)).toEqual(3.4028234e38f) // largest pos normal form
expect(f(0x4d124568)).toEqual(1.53376384e8f) // an arbitrary pos normal form
expect(f(0x80800000)).toEqual(-1.17549435e-38f) // smallest neg normal form
expect(f(0xff7fffff)).toEqual(-3.4028234e38f) // largest neg normal form
expect(f(0xcd124568)).toEqual(-1.53376384e8f) // an arbitrary neg normal form
// Subnormal forms
expect(f(0x00000001)).toEqual(Float.MinPositiveValue) // smallest pos subnormal form
expect(f(0x007fffff)).toEqual(1.1754942e-38f) // largest pos subnormal form
expect(f(0x007c5d44)).toEqual(1.1421059e-38f) // an arbitrary pos subnormal form
expect(f(0x80000001)).toEqual(-Float.MinPositiveValue) // smallest neg subnormal form
expect(f(0x807fffff)).toEqual(-1.1754942e-38f) // largest neg subnormal form
expect(f(0x807c5d44)).toEqual(-1.1421059e-38f) // an arbitrary neg subnormal form
}
it("floatToIntBits") {
import JFloat.{floatToIntBits => f}
// Specials
expect(f(Float.PositiveInfinity)).toEqual(0x7f800000)
expect(f(Float.NegativeInfinity)).toEqual(0xff800000)
expect(f(0.0f)).toEqual(0x00000000)
expect(f(-0.0f)).toEqual(0x80000000)
expect(f(Float.NaN)).toEqual(0x7fc00000) // canonical NaN
// Normal forms
expect(f(1.17549435e-38f)).toEqual(0x00800000) // smallest pos normal form
expect(f(3.4028234e38f)).toEqual(0x7f7fffff) // largest pos normal form
expect(f(1.53376384e8f)).toEqual(0x4d124568) // an arbitrary pos normal form
expect(f(-1.17549435e-38f)).toEqual(0x80800000) // smallest neg normal form
expect(f(-3.4028234e38f)).toEqual(0xff7fffff) // largest neg normal form
expect(f(-1.53376384e8f)).toEqual(0xcd124568) // an arbitrary neg normal form
// Subnormal forms
expect(f(Float.MinPositiveValue)).toEqual(0x00000001) // smallest pos subnormal form
expect(f(1.1754942e-38f)).toEqual(0x007fffff) // largest pos subnormal form
expect(f(1.1421059e-38f)).toEqual(0x007c5d44) // an arbitrary pos subnormal form
expect(f(-Float.MinPositiveValue)).toEqual(0x80000001) // smallest neg subnormal form
expect(f(-1.1754942e-38f)).toEqual(0x807fffff) // largest neg subnormal form
expect(f(-1.1421059e-38f)).toEqual(0x807c5d44) // an arbitrary neg subnormal form
}
}
}
|
