Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

numeric/float_test.go

@@ -0,0 +1,64 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package numeric
+
+import (
+	"testing"
+)
+
+// test that the float/sortable int operations work both ways
+// and that the corresponding integers sort the same as
+// the original floats would have
+func TestSortabledFloat64ToInt64(t *testing.T) {
+	tests := []struct {
+		input float64
+	}{
+		{
+			input: -4640094584139352638,
+		},
+		{
+			input: -167.42,
+		},
+		{
+			input: -1.11,
+		},
+		{
+			input: 0,
+		},
+		{
+			input: 3.14,
+		},
+		{
+			input: 167.42,
+		},
+	}
+
+	var lastInt64 *int64
+	for _, test := range tests {
+		actual := Float64ToInt64(test.input)
+		if lastInt64 != nil {
+			// check that this float is greater than the last one
+			if actual <= *lastInt64 {
+				t.Errorf("expected greater than prev, this: %d, last %d", actual, *lastInt64)
+			}
+		}
+		lastInt64 = &actual
+		convertedBack := Int64ToFloat64(actual)
+		// assert that we got back what we started with
+		if convertedBack != test.input {
+			t.Errorf("expected %f, got %f", test.input, convertedBack)
+		}
+	}
+}