Add grafonnet-lib based tests and formatting script

Merged in #4

Add grafonnet-lib based tests and formatting script,
but use jsonnetfmt instead of jsonnet fmt
(way described in master C++ jsonnet, go-jsonnet ver.16 and jsonnet docs)
and include needed jb vendor libraries.
Add simple dashboard test to fixate behavior.
Format source code with jsonnetfmt.

Author: DifferentialOrange

.gitignore

@@ -21,3 +21,4 @@ node_modules
 /tmp/*
 !/tmp/.keep
 /vendor
+*_test_output.json

tarantool/dashboard.libsonnet

@@ -20,72 +20,72 @@ local datasource = '${DS_INFLUXDB}';
 local measurement = '${TARANTOOL_MEASUREMENT}';
 
 dashboard
-  .addInput(
-    name='DS_INFLUXDB',
-    label='InfluxDB bank',
-    type='datasource',
-    pluginId='influxdb',
-    pluginName='InfluxDB',
-    description='InfluxDB Tarantool metrics bank'
-  )
-  .addInput(
-    name='TARANTOOL_MEASUREMENT',
-    label='Measurement',
-    type='constant',
-    pluginId=null,
-    pluginName=null,
-    description='InfluxDB Tarantool metrics measurement'
-  )
-  .addRequired(
-    type='grafana',
-    id='grafana',
-    name='Grafana',
-    version='6.6.0'
-  )
-  .addRequired(
-    type='datasource',
-    id='influxdb',
-    name='InfluxDB',
-    version='1.0.0'
-  )
-  .addRequired(
-    type='panel',
-    id='graph',
-    name='Graph',
-    version=''
-  )
-  .addRequired(
-    type='panel',
-    id='text',
-    name='Text',
-    version=''
-  )
-  .addPanel(
-    grafana.row.new(title='memory'),
-    {x: 0, y: 0}
-  )
-  .addPanel(
-    slab.monitor_info(), 
-    {w: 24, h: 3, x: 0, y: 0}
-  )
-  .addPanel(
-    slab.quota_used_ratio(
-      datasource=datasource,
-      measurement=measurement,
-    ),
-    {w: 8, h: 8, x: 0, y: 3}
-  )
-  .addPanel(
-    slab.arena_used_ratio(
-      datasource=datasource,
-      measurement=measurement,
-    ),
-    {w: 8, h: 8, x: 8, y: 3},
-  )
-  .addPanel(
-    slab.items_used_ratio(
-      datasource=datasource,
-      measurement=measurement,
-    ),
-    {w: 8, h: 8, x: 16, y: 3},
-  )
+.addInput(
+  name='DS_INFLUXDB',
+  label='InfluxDB bank',
+  type='datasource',
+  pluginId='influxdb',
+  pluginName='InfluxDB',
+  description='InfluxDB Tarantool metrics bank'
+)
+.addInput(
+  name='TARANTOOL_MEASUREMENT',
+  label='Measurement',
+  type='constant',
+  pluginId=null,
+  pluginName=null,
+  description='InfluxDB Tarantool metrics measurement'
+)
+.addRequired(
+  type='grafana',
+  id='grafana',
+  name='Grafana',
+  version='6.6.0'
+)
+.addRequired(
+  type='datasource',
+  id='influxdb',
+  name='InfluxDB',
+  version='1.0.0'
+)
+.addRequired(
+  type='panel',
+  id='graph',
+  name='Graph',
+  version=''
+)
+.addRequired(
+  type='panel',
+  id='text',
+  name='Text',
+  version=''
+)
+.addPanel(
+  grafana.row.new(title='memory'),
+  { x: 0, y: 0 }
+)
+.addPanel(
+  slab.monitor_info(),
+  { w: 24, h: 3, x: 0, y: 0 }
+)
+.addPanel(
+  slab.quota_used_ratio(
+    datasource=datasource,
+    measurement=measurement,
+  ),
+  { w: 8, h: 8, x: 0, y: 3 }
+)
+.addPanel(
+  slab.arena_used_ratio(
+    datasource=datasource,
+    measurement=measurement,
+  ),
+  { w: 8, h: 8, x: 8, y: 3 },
+)
+.addPanel(
+  slab.items_used_ratio(
+    datasource=datasource,
+    measurement=measurement,
+  ),
+  { w: 8, h: 8, x: 16, y: 3 },
+)

tests.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+jsonnet_fmt='-n 2 --max-blank-lines 2 --sort-imports --string-style s --comment-style s'
+x=0
+
+for i in `find ./tarantool ./tests -name '*.jsonnet' -or -name '*.libsonnet'`
+do
+    t="Formatting $i..."
+    if [[ "$1" == "update" ]]; then
+        jsonnetfmt -i $jsonnet_fmt $i
+    fi
+    if jsonnetfmt --test $jsonnet_fmt $i;
+    then
+        echo $t OK
+    else
+        echo $t NOK
+        x=1
+    fi
+done
+
+for i in tests/*/*.jsonnet
+do
+    json=$(dirname $i)/$( basename $i .jsonnet )_test_output.json
+    json_e=$(dirname $i)/$( basename $i .jsonnet )_compiled.json
+    t="Compiling $i..."
+    if jsonnet -J . -J ./vendor $i > $json
+    then
+        echo $t OK
+    else
+        echo $t NOK
+        x=1
+        continue
+    fi
+
+    if [[ "$1" == "update" ]]; then cp $json $json_e; fi
+
+    t="Checking $i..."
+    if diff -urt $json $json_e
+    then
+        echo $t OK
+    else
+        echo $t NOK
+        x=1
+    fi
+done
+exit $x

tests/InfluxDB/dashboard.jsonnet

@@ -0,0 +1 @@
+import 'tarantool/dashboard.libsonnet'