Print build output on build result assertion failure.

^KT-45745 In Progress

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

@@ -0,0 +1,20 @@
+/*
+ * 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
+
+internal fun BuildResult.printBuildOutput() {
+    println(
+        """
+        |Failed assertion build output:
+        |#######################
+        |$output
+        |#######################
+        |
+        """.trimMargin()
+    )
+}

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

@@ -14,6 +14,7 @@ fun BuildResult.assertOutputContains(
     expectedSubString: String
 ) {
     assert(output.contains(expectedSubString)) {
+        printBuildOutput()
         "Build output does not contain \"$expectedSubString\""
     }
 }
@@ -28,6 +29,8 @@ fun BuildResult.assertOutputDoesNotContain(
     wrappingCharsCount: Int = 100,
 ) {
     assert(!output.contains(notExpectedSubString)) {
+        printBuildOutput()
+
         // In case if notExpectedSubString is multiline string
         val occurrences = mutableListOf<Pair<Int, Int>>()
         var startIndex = output.indexOf(notExpectedSubString)
@@ -64,6 +67,8 @@ fun BuildResult.assertOutputContains(
     expected: Regex
 ) {
     assert(output.contains(expected)) {
+        printBuildOutput()
+
         "Build output does not contain any line matching '$expected' regex."
     }
 }
@@ -75,6 +80,8 @@ fun BuildResult.assertOutputDoesNotContain(
     regexToCheck: Regex
 ) {
     assert(!output.contains(regexToCheck)) {
+        printBuildOutput()
+        
         val matchedStrings = regexToCheck
             .findAll(output)
             .map { it.value }

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

@@ -14,6 +14,7 @@ import org.gradle.testkit.runner.TaskOutcome
 fun BuildResult.assertTasksExecuted(vararg tasks: String) {
     tasks.forEach { task ->
         assert(task(task)?.outcome == TaskOutcome.SUCCESS) {
+            printBuildOutput()
             "Task $task didn't have 'SUCCESS' state: ${task(task)?.outcome}"
         }
     }
@@ -25,6 +26,7 @@ fun BuildResult.assertTasksExecuted(vararg tasks: String) {
 fun BuildResult.assertTasksFailed(vararg tasks: String) {
     tasks.forEach { task ->
         assert(task(task)?.outcome == TaskOutcome.FAILED) {
+            printBuildOutput()
             "Task $task didn't have 'FAILED' state: ${task(task)?.outcome}"
         }
     }
@@ -36,6 +38,7 @@ fun BuildResult.assertTasksFailed(vararg tasks: String) {
 fun BuildResult.assertTasksUpToDate(vararg tasks: String) {
     tasks.forEach { task ->
         assert(task(task)?.outcome == TaskOutcome.UP_TO_DATE) {
+            printBuildOutput()
             "Task $task didn't have 'UP-TO-DATE' state: ${task(task)?.outcome}"
         }
     }
@@ -47,6 +50,7 @@ fun BuildResult.assertTasksUpToDate(vararg tasks: String) {
 fun BuildResult.assertTasksSkipped(vararg tasks: String) {
     tasks.forEach { task ->
         assert(task(task)?.outcome == TaskOutcome.SKIPPED) {
+            printBuildOutput()
             "Task $task didn't have 'SKIPPED' state: ${task(task)?.outcome}"
         }
     }
@@ -58,6 +62,7 @@ fun BuildResult.assertTasksSkipped(vararg tasks: String) {
 fun BuildResult.assertTasksFromCache(vararg tasks: String) {
     tasks.forEach { task ->
         assert(task(task)?.outcome == TaskOutcome.FROM_CACHE) {
+            printBuildOutput()
             "Task $task didn't have 'FROM_CACHE' state: ${task(task)?.outcome}"
         }
     }
@@ -69,6 +74,7 @@ fun BuildResult.assertTasksFromCache(vararg tasks: String) {
 fun BuildResult.assertTasksNoSource(vararg tasks: String) {
     tasks.forEach { task ->
         assert(task(task)?.outcome == TaskOutcome.NO_SOURCE) {
+            printBuildOutput()
             "Task $task didn't have 'NO_SOURCE' state: ${task(task)?.outcome}"
         }
     }