private void checkVersion(String artifactName, String versionSpec, Artifact artifact)
throws MojoExecutionException {
VersionRange range;
try {
range = VersionRange.createFromVersionSpec(versionSpec);
if (!range.containsVersion(new DefaultArtifactVersion(artifact.getVersion())))
{
throw new MojoExecutionException(
"JUnit4 plugin requires " + artifactName + " in version " +
versionSpec + " among project dependencies, you declared: "
+ artifact.getVersion());