![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/graph/graph_test.go b/graph/graph_test.go
--- /dev/null
+++ b/graph/graph_test.go
@@ -0,0 +1,193 @@
+//
+// Copyright (C) 2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package graph
+
+import (
+ "reflect"
+ "testing"
+ "time"
+
+ "github.com/sysdb/go/sysdb"
+)
+
+func TestAlign(t *testing.T) {
+ for _, test := range []struct {
+ ts1, ts2 *sysdb.Timeseries
+ want *sysdb.Timeseries
+ }{
+ {
+ ts1: &sysdb.Timeseries{
+ Start: ts(4, 5, 0),
+ End: ts(4, 10, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 5, 0), 0.0},
+ {ts(4, 6, 0), 0.0},
+ {ts(4, 7, 0), 1.0},
+ {ts(4, 8, 0), 1.0},
+ {ts(4, 9, 0), 0.0},
+ {ts(4, 10, 0), 0.0},
+ },
+ },
+ },
+ ts2: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 8, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ {ts(4, 8, 0), 1.0},
+ },
+ },
+ },
+ want: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 8, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ {ts(4, 8, 0), 1.0},
+ },
+ },
+ },
+ },
+ {
+ ts1: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 8, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ {ts(4, 8, 0), 1.0},
+ },
+ },
+ },
+ ts2: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 8, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ {ts(4, 8, 0), 1.0},
+ },
+ },
+ },
+ want: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 8, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ {ts(4, 8, 0), 1.0},
+ },
+ },
+ },
+ },
+ {
+ ts1: &sysdb.Timeseries{
+ Start: ts(4, 5, 0),
+ End: ts(4, 10, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 5, 0), 0.0},
+ {ts(4, 6, 0), 0.0},
+ {ts(4, 7, 0), 0.0},
+ {ts(4, 8, 0), 1.0},
+ {ts(4, 9, 0), 1.0},
+ {ts(4, 10, 0), 1.0},
+ },
+ },
+ },
+ ts2: &sysdb.Timeseries{
+ Start: ts(4, 8, 0),
+ End: ts(4, 12, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 8, 0), 1.0},
+ {ts(4, 9, 0), 1.0},
+ {ts(4, 10, 0), 1.0},
+ {ts(4, 11, 0), 0.0},
+ {ts(4, 12, 0), 0.0},
+ },
+ },
+ },
+ want: &sysdb.Timeseries{
+ Start: ts(4, 8, 0),
+ End: ts(4, 10, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 8, 0), 1.0},
+ {ts(4, 9, 0), 1.0},
+ {ts(4, 10, 0), 1.0},
+ },
+ },
+ },
+ },
+ {
+ ts1: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 7, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ },
+ },
+ },
+ ts2: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 7, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ },
+ },
+ },
+ want: &sysdb.Timeseries{
+ Start: ts(4, 7, 0),
+ End: ts(4, 7, 0),
+ Data: map[string][]sysdb.DataPoint{
+ "value": []sysdb.DataPoint{
+ {ts(4, 7, 0), 1.0},
+ },
+ },
+ },
+ },
+ } {
+ if err := align(test.ts1, test.ts2); err != nil {
+ t.Errorf("align(%v, %v) = %v; want <nil>", test.ts1, test.ts2, err)
+ }
+
+ if !reflect.DeepEqual(test.ts1, test.want) || !reflect.DeepEqual(test.ts2, test.want) {
+ t.Errorf("align() unexpected result %v, %v; want %v", test.ts1, test.ts2, test.want)
+ }
+ }
+}
+
+func ts(hour, min, sec int) sysdb.Time {
+ return sysdb.Time(time.Date(2016, 1, 1, hour, min, sec, 0, time.UTC))
+}
+
+// vim: set tw=78 sw=4 sw=4 noexpandtab :