build: create parallel travis builds to isolate race condition tests

This commit modifies the travis build script, and our local test script
to ensure that the race condition builds are conducted in a parallel
build. After this commit two travis builds will be kicked off for each
push/commit: one that runs the race condition tests in isolation, and
another that runs the integration tests then the coverage tests.

In order to do the above cleanly, the integration tests are now guarded
behind a build flag. In order to run the integration tests, one now
needs to specify the `-tags rpctest` flag when running the `go test`
command.

.travis.yml

@@ -16,6 +16,9 @@ install:
   - go install . ./cmd/...
   - popd
   - popd
+env:
+  - RACE=false
+  - RACE=true
 script:
   - export PATH=$PATH:$HOME/gopath/bin
-  - ./gotest.sh -l -r -c
+  - ./gotest.sh

docs/INSTALL.md

@@ -129,8 +129,8 @@ Bitcoin chain. Also `lnd` also supports Litecoin, one is able to also specified
 be active on Litecoin's testnet4.
 
 #### Accurate as of:
-roasbeef/btcd commit: 54362e17a5b80643ef1e12edc08895a2e2a1202b
+roasbeef/btcd commit: f8c02aff4e7a807ba0c1349e2db03695d8e790e8
 
-roasbeef/btcutil commit: d347e49
+roasbeef/btcutil commit: a259eaf2ec1b54653cdd67848a41867f280797ee
 
 lightningnetwork/lnd commit: d7b36c6

gotest.sh

@@ -32,7 +32,7 @@ check_test_ports() {
 # coverage profile. Be aware that we are skipping the integration tests, as the
 # tool won't gather any useful coverage information from them.
 test_with_coverage_profile() {
-    print "* Run tests with creating coverage profile"
+    print "* Running tests with creating coverage profile"
     check_test_ports
 
     echo "mode: count" > profile.cov
@@ -73,7 +73,7 @@ test_with_coverage_profile() {
 # test_race_conditions run standard go test without creating coverage
 # profile but with race condition checks.
 test_race_conditions() {
-    print "* Run tests with race conditions checks"
+    print "* Running tests with the race condition detector"
     check_test_ports
     
     test_targets=$(go list ./... | grep -v '/vendor/')
@@ -151,18 +151,21 @@ print "* Build source"
 go install -v . ./cmd/...
 
 # Lint check is first because we shouldn't run tests on garbage code.
-if [ "$NEED_LINT" == "true" ]; then
+if [ "$NEED_LINT" == "true" ] || [ "$RACE" == "false" ]; then
     lint_check
 fi
 
 # Race condition second because we shouldn't check coverage on buggy code.
-if [ "$NEED_RACE" == "true" ]; then
+if [ "$NEED_RACE" == "true" ] || [ "$RACE" == "true" ]; then
     test_race_conditions
 fi
 
 # Test coverage is third because in this case code should work properly and
 # we may calmly send coverage profile (if script is run on travis)
-if [ "$NEED_COVERAGE" == "true" ]; then
+if [ "$NEED_COVERAGE" == "true" ] || [ "$RACE" == "false" ]; then
+    print "* Running integration tests"
+    go test -v -tags rpctest
+
     test_with_coverage_profile
 fi
 

lnd_test.go

@@ -1,3 +1,5 @@
+// +build rpctest
+
 package main
 
 import (