Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 95 insertions, 0 deletions

diff --git a/src/cmp/cmp_test.go b/src/cmp/cmp_test.go
new file mode 100644
index 0000000..b0c0dc3
--- /dev/null
+++ b/src/cmp/cmp_test.go
@@ -0,0 +1,95 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmp_test
+
+import (
+	"cmp"
+	"math"
+	"sort"
+	"testing"
+)
+
+var negzero = math.Copysign(0, -1)
+
+var tests = []struct {
+	x, y    any
+	compare int
+}{
+	{1, 2, -1},
+	{1, 1, 0},
+	{2, 1, +1},
+	{"a", "aa", -1},
+	{"a", "a", 0},
+	{"aa", "a", +1},
+	{1.0, 1.1, -1},
+	{1.1, 1.1, 0},
+	{1.1, 1.0, +1},
+	{math.Inf(1), math.Inf(1), 0},
+	{math.Inf(-1), math.Inf(-1), 0},
+	{math.Inf(-1), 1.0, -1},
+	{1.0, math.Inf(-1), +1},
+	{math.Inf(1), 1.0, +1},
+	{1.0, math.Inf(1), -1},
+	{math.NaN(), math.NaN(), 0},
+	{0.0, math.NaN(), +1},
+	{math.NaN(), 0.0, -1},
+	{math.NaN(), math.Inf(-1), -1},
+	{math.Inf(-1), math.NaN(), +1},
+	{0.0, 0.0, 0},
+	{negzero, negzero, 0},
+	{negzero, 0.0, 0},
+	{0.0, negzero, 0},
+	{negzero, 1.0, -1},
+	{negzero, -1.0, +1},
+}
+
+func TestLess(t *testing.T) {
+	for _, test := range tests {
+		var b bool
+		switch test.x.(type) {
+		case int:
+			b = cmp.Less(test.x.(int), test.y.(int))
+		case string:
+			b = cmp.Less(test.x.(string), test.y.(string))
+		case float64:
+			b = cmp.Less(test.x.(float64), test.y.(float64))
+		}
+		if b != (test.compare < 0) {
+			t.Errorf("Less(%v, %v) == %t, want %t", test.x, test.y, b, test.compare < 0)
+		}
+	}
+}
+
+func TestCompare(t *testing.T) {
+	for _, test := range tests {
+		var c int
+		switch test.x.(type) {
+		case int:
+			c = cmp.Compare(test.x.(int), test.y.(int))
+		case string:
+			c = cmp.Compare(test.x.(string), test.y.(string))
+		case float64:
+			c = cmp.Compare(test.x.(float64), test.y.(float64))
+		}
+		if c != test.compare {
+			t.Errorf("Compare(%v, %v) == %d, want %d", test.x, test.y, c, test.compare)
+		}
+	}
+}
+
+func TestSort(t *testing.T) {
+	// Test that our comparison function is consistent with
+	// sort.Float64s.
+	input := []float64{1.0, 0.0, negzero, math.Inf(1), math.Inf(-1), math.NaN()}
+	sort.Float64s(input)
+	for i := 0; i < len(input)-1; i++ {
+		if cmp.Less(input[i+1], input[i]) {
+			t.Errorf("Less sort mismatch at %d in %v", i, input)
+		}
+		if cmp.Compare(input[i], input[i+1]) > 0 {
+			t.Errorf("Compare sort mismatch at %d in %v", i, input)
+		}
+	}
+}