1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/github.com/lunixbochs/struc/custom_float16_test.go b/vendor/github.com/lunixbochs/struc/custom_float16_test.go
new file mode 100644
index 0000000..11f73cb
--- /dev/null
+++ b/vendor/github.com/lunixbochs/struc/custom_float16_test.go
@@ -0,0 +1,56 @@
+package struc
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestFloat16(t *testing.T) {
+	// test cases from https://en.wikipedia.org/wiki/Half-precision_floating-point_format#Half_precision_examples
+	tests := []struct {
+		B string
+		F float64
+	}{
+		//s expnt significand
+		{"0 01111 0000000000", 1},
+		{"0 01111 0000000001", 1.0009765625},
+		{"1 10000 0000000000", -2},
+		{"0 11110 1111111111", 65504},
+		// {"0 00001 0000000000", 0.0000610352},
+		// {"0 00000 1111111111", 0.0000609756},
+		// {"0 00000 0000000001", 0.0000000596046},
+		{"0 00000 0000000000", 0},
+		// {"1 00000 0000000000", -0},
+		{"0 11111 0000000000", math.Inf(1)},
+		{"1 11111 0000000000", math.Inf(-1)},
+		{"0 01101 0101010101", 0.333251953125},
+	}
+	for _, test := range tests {
+		var buf bytes.Buffer
+		f := Float16(test.F)
+		if err := Pack(&buf, &f); err != nil {
+			t.Error("pack failed:", err)
+			continue
+		}
+		bitval, _ := strconv.ParseUint(strings.Replace(test.B, " ", "", -1), 2, 16)
+		tmp := binary.BigEndian.Uint16(buf.Bytes())
+		if tmp != uint16(bitval) {
+			t.Errorf("incorrect pack: %s != %016b (%f)", test.B, tmp, test.F)
+			continue
+		}
+		var f2 Float16
+		if err := Unpack(&buf, &f2); err != nil {
+			t.Error("unpack failed:", err)
+			continue
+		}
+		// let sprintf deal with (im)precision for me here
+		if fmt.Sprintf("%f", f) != fmt.Sprintf("%f", f2) {
+			t.Errorf("incorrect unpack: %016b %f != %f", bitval, f, f2)
+		}
+	}
+}