// tag::after-evaluate[]
gradle.beforeProject {
    // Set a default value
    project.ext.set("hasTests", false)
}

gradle.afterProject {
    if (project.ext.has("hasTests") && project.ext.get("hasTests") as Boolean) {
        val projectString = project.toString()
        println("Adding test task to $projectString")
        tasks.register("test") {
            doLast {
                println("Running tests for $projectString")
            }

// tag::after-evaluate[]
gradle.beforeProject { project ->
    project.ext.set("hasTests", false)
}

gradle.afterProject { project ->
    if (project.ext.has("hasTests") && project.ext.get("hasTests") as Boolean) {
        def projectString = project.toString()
        println "Adding test task to $projectString"
        project.task('test') {
            doLast {
                println "Running tests for $projectString"
            }
        }

hasTests = true...

extra["hasTests"] = true...

#include "gtest/gtest.h"
#include "${generatedId}/header.h"

using namespace testing;
<%
if (hasTests) {
    out.println """
TEST(GeneratedTests, test_lib) {
    ASSERT_EQ(0, function_${generatedId}());
}"""
}
%>

int main(int argc, char **argv) {
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();