Run integration tests to improve reported coverage

plugin/src/test/java/com/yelp/codegen/MainTest.kt

@@ -0,0 +1,43 @@
+package com.yelp.codegen
+import java.io.File
+import org.junit.Test
+import org.junit.rules.TemporaryFolder
+
+class MainTest {
+
+    private fun runGenerator(platform: String) {
+        val temporaryFolder = TemporaryFolder()
+        val junitTestsSpecsPath = File(
+            // Repo root
+            File(".").absoluteFile.parentFile.parentFile.absolutePath,
+            "samples${File.separator}junit-tests${File.separator}junit_tests_specs.json"
+        ).path
+
+        try {
+            temporaryFolder.create()
+            main(
+                listOf(
+                    "-p", platform,
+                    "-i", junitTestsSpecsPath,
+                    "-o", temporaryFolder.newFolder("kotlin").absolutePath,
+                    "-s", "junittests",
+                    "-v", "0.0.1",
+                    "-g", "com.yelp.codegen",
+                    "-a", " generatecodesamples"
+                ).toTypedArray()
+            )
+        } finally {
+            temporaryFolder.delete()
+        }
+    }
+
+    @Test
+    fun generateKotlinFromJUnitTestSampleSpecs() {
+        runGenerator("kotlin")
+    }
+
+    @Test
+    fun generateKotlinCoroutinesFromJUnitTestSampleSpecs() {
+        runGenerator("kotlin-coroutines")
+    }
+}