Add tasks assertions.

^KT-45744 In Progress

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/tasksAssertions.kt

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.gradle.testbase
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.TaskOutcome
+
+/**
+ * Asserts given [tasks] have 'SUCCESS' execution state.
+ */
+fun BuildResult.assertTasksExecuted(vararg tasks: String) {
+    tasks.forEach { task ->
+        assert(task(task)?.outcome == TaskOutcome.SUCCESS) {
+            "Task $task didn't have 'SUCCESS' state: ${task(task)?.outcome}"
+        }
+    }
+}
+
+/**
+ * Asserts given [tasks] have 'FAILED' execution state.
+ */
+fun BuildResult.assertTasksFailed(vararg tasks: String) {
+    tasks.forEach { task ->
+        assert(task(task)?.outcome == TaskOutcome.FAILED) {
+            "Task $task didn't have 'FAILED' state: ${task(task)?.outcome}"
+        }
+    }
+}
+
+/**
+ * Asserts given [tasks] have 'UP-TO-DATE' execution state.
+ */
+fun BuildResult.assertTasksUpToDate(vararg tasks: String) {
+    tasks.forEach { task ->
+        assert(task(task)?.outcome == TaskOutcome.UP_TO_DATE) {
+            "Task $task didn't have 'UP-TO-DATE' state: ${task(task)?.outcome}"
+        }
+    }
+}
+
+/**
+ * Asserts given [tasks] have 'SKIPPED' execution state.
+ */
+fun BuildResult.assertTasksSkipped(vararg tasks: String) {
+    tasks.forEach { task ->
+        assert(task(task)?.outcome == TaskOutcome.SKIPPED) {
+            "Task $task didn't have 'SKIPPED' state: ${task(task)?.outcome}"
+        }
+    }
+}
+
+/**
+ * Asserts given [tasks] have 'FROM_CACHE' execution state.
+ */
+fun BuildResult.assertTasksFromCache(vararg tasks: String) {
+    tasks.forEach { task ->
+        assert(task(task)?.outcome == TaskOutcome.FROM_CACHE) {
+            "Task $task didn't have 'FROM_CACHE' state: ${task(task)?.outcome}"
+        }
+    }
+}
+
+/**
+ * Asserts given [tasks] have 'NO_SOURCE' execution state.
+ */
+fun BuildResult.assertTasksNoSource(vararg tasks: String) {
+    tasks.forEach { task ->
+        assert(task(task)?.outcome == TaskOutcome.NO_SOURCE) {
+            "Task $task didn't have 'NO_SOURCE' state: ${task(task)?.outcome}"
+        }
+    }
+}