Split unit and integration tests

.travis.yml

@@ -36,12 +36,13 @@ before_install:
 
 script:
   - . ./.travis.gofmt.sh
+
   # Run the unit tests first
   - |
       set -e
       echo "" > coverage.txt
 
-      go test -race -coverprofile=profile.out -coverpkg ./...
+      go test -tags=integration -race -coverprofile=profile.out -coverpkg ./...
       if [ -f profile.out ]; then
         cat profile.out >> coverage.txt
         rm profile.out

README.md

@@ -129,20 +129,24 @@ tree is a semi-intelligent way and producing Go. Easy, right!?
 
 # Testing
 
-Testing is done with a set of integrations tests in the form of complete C
-programs that can be found in the
+By default only unit tests are run with `go test`. You can also include the
+integration tests:
+
+```bash
+go test -tags=integration ./...
+```
+
+Integration tests in the form of complete C programs that can be found in the
 [tests](https://github.com/elliotchance/c2go/tree/master/tests) directory.
 
-For each of those files:
+Integration tests work like this:
 
 1. Clang compiles the C to a binary as normal.
 2. c2go converts the C file to Go.
 3. The Go is built to produce another binary.
 4. Both binaries are executed and the output is compared. All C files will
 contain some output so the results can be verified.
 
-The test suite is run with `go test`.
-
 # Contributing
 
 Contributing is done with pull requests. There is no help that is too small! :)

main_test.go

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