test parallel execution with sync resolvers and suspending resolvers

src/test/kotlin/com/github/pgutkowski/kgraphql/integration/ParallelExecutionTest.kt

@@ -0,0 +1,57 @@
+package com.github.pgutkowski.kgraphql.integration
+
+import com.github.pgutkowski.kgraphql.KGraphQL
+import com.github.pgutkowski.kgraphql.assertNoErrors
+import com.github.pgutkowski.kgraphql.extract
+import com.github.pgutkowski.kgraphql.deserialize
+import kotlinx.coroutines.experimental.delay
+import org.hamcrest.CoreMatchers
+import org.hamcrest.MatcherAssert
+import org.junit.Test
+
+class ParallelExecutionTest {
+
+    val syncResolversSchema = KGraphQL.schema {
+        repeat(1000) {
+            query("automated-${it}") {
+                resolver { ->
+                    Thread.sleep(3)
+                    "${it}"
+                }
+            }
+        }
+    }
+
+    val suspendResolverSchema = KGraphQL.schema {
+        repeat(1000) {
+            query("automated-${it}") {
+                suspendResolver { ->
+                    delay(3)
+                    "${it}"
+                }
+            }
+        }
+    }
+
+    val query = "{ " + (0..999).map { "automated-${it}" }.joinToString(", ") + " }"
+
+    @Test
+    fun `1000 synchronous resolvers sleeping with Thread sleep`(){
+        val map = deserialize(syncResolversSchema.execute(query))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-0"), CoreMatchers.equalTo("0"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-271"), CoreMatchers.equalTo("271"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-314"), CoreMatchers.equalTo("314"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-500"), CoreMatchers.equalTo("500"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-999"), CoreMatchers.equalTo("999"))
+    }
+
+    @Test
+    fun `1000 suspending resolvers sleeping with suspending delay`(){
+        val map = deserialize(suspendResolverSchema.execute(query))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-0"), CoreMatchers.equalTo("0"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-271"), CoreMatchers.equalTo("271"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-314"), CoreMatchers.equalTo("314"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-500"), CoreMatchers.equalTo("500"))
+        MatcherAssert.assertThat(map.extract<String>("data/automated-999"), CoreMatchers.equalTo("999"))
+    }
+}