Run tests with valgrind

Dockerfile

@@ -13,6 +13,7 @@ RUN set -x \
             g++ openjdk-8-jdk-headless sbt cmake make curl git \
             zlib1g-dev \
             libgc-dev libunwind8-dev libre2-dev \
+            valgrind \
  && rm -rf /var/lib/apt/lists/*
 
 ARG LLVM_VERSION=6.0

tests/src/test/scala/org/scalanative/bindgen/BindgenSpec.scala

@@ -3,6 +3,7 @@ package org.scalanative.bindgen
 import java.io.File
 import org.scalatest.FunSpec
 import scala.io.Source
+import scala.sys.process.{Process, ProcessLogger}
 
 class BindgenSpec extends FunSpec {
   describe("Bindgen") {
@@ -32,6 +33,23 @@ class BindgenSpec extends FunSpec {
     def contentOf(file: File) =
       Source.fromFile(file).getLines.mkString("\n").trim()
 
+    /**
+     * @return valgrind exit code
+     */
+    def checkMemoryErrors(inputFile: File): Int = {
+      val cmd = Seq(
+        "valgrind",
+        "--leak-check=full",
+        "--error-exitcode=1",
+        bindgenPath,
+        inputFile.getAbsolutePath,
+        "--name",
+        "lib",
+        "--"
+      )
+      Process(cmd).run(ProcessLogger(_ => ())).exitValue()
+    }
+
     for (input <- inputDirectory.listFiles() if input.getName.endsWith(".h")) {
       it(s"should generate bindings for ${input.getName}") {
         val testName = input.getName.replace(".h", "")
@@ -43,6 +61,10 @@ class BindgenSpec extends FunSpec {
         assert(output.exists())
         assert(contentOf(output) == contentOf(expected))
       }
+
+      it(s"should generate bindings for ${input.getName} without memory errors") {
+        assert(0 == checkMemoryErrors(input))
+      }
     }
   }
 }