private static String simpleClassName(Class<?> detailsType) {
        if (!detailsType) {
            return null
        } else {
            // Class.simpleName returns "" for certain anonymous classes and unhelpful things like "Details" for our op interfaces
            String clsName = detailsType.interfaces.length == 0 ? detailsType.name : detailsType.interfaces.first().name
            clsName.substring(clsName.lastIndexOf('.') + 1)

    }

    /**
     * Indirect usage means that stack trace at the time the deprecation is logged does not indicate the call site.
     * This directs GE to not display unhelpful stacktraces with the deprecation.
     * <p>
     * Output: ${feature} has been deprecated.
     */
    @CheckReturnValue
    public static DeprecationMessageBuilder<?> deprecateIndirectUsage(String feature) {

          - Value: 'round' selects variant: 'blueRoundElements'
          - Value: 'square' selects variant: 'blueSquareElements'
          - Value: 'triangle' selects variant: 'blueTriangleElements'""")
        and: "Helpful resolutions are provided"
        assertSuggestsReviewingAlgorithm()

                .assertHasLineNumber(4)
    }

    @Issue("https://github.com/gradle/gradle/issues/14984")
    def "referencing a non-existing closure-taking method yields a helpful error message"() {
        buildFile << """
            plugins {
                id("java")
            }

            java {
                toolchains { // should be toolchain
                }

## Trace test programs

The trace test programs in the `testprog` directory generate traces to
stdout.
Otherwise they're just normal programs.

## Trace debug commands

The `cmd` directory contains helpful tools for debugging traces.

* `gotraceraw` parses traces without validation.
  It can produce a text version of the trace wire format, or convert
  the text format back into bytes.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package poll

import "syscall"

// Not strictly needed, but very helpful for debugging, see issue #10221.
//
//go:cgo_import_dynamic _ _ "libsendfile.so"
//go:cgo_import_dynamic _ _ "libsocket.so"

// maxSendfileSize is the largest chunk size we ask the kernel to copy
// at a time.

    def "can run the wrapper task when the build was started with the wrapper"() {
        given:
        prepareWrapper()

        expect:
        wrapperExecuter.withTasks('wrapper').run()
    }

    def "prints helpful error message on invalid version argument format: #badVersion"() {
        given:
        prepareWrapper()

        expect:

	// Write to the pipe to unblock it.
	if _, err := syscall.Write(wfd, []byte{10}); err != nil {
		log.Fatalf("failed to write to pipe: %v", err)
	}

	// Wait for the goroutine to unblock and start running.
	// This is helpful to catch incorrect information written
	// down for the syscall-blocked goroutine, since it'll start
	// executing, and that execution information will be
	// inconsistent.
	<-done

	// Stop tracing.
	trace.Stop()

 * limitations under the License.
 */

package org.gradle.integtests.fixtures.logging.comparison

import spock.lang.Specification

class PotentialMatchTest extends Specification {
    def "potential match renders helpful context"() {
        when:
        def pm = new PotentialMatch(expectedLines, actualLines, matchBegins)
        def expectedContextMsg = PotentialMatch.HEADER + '\n' + contextBody.join('\n')

        then:

	// for duplicate registration.
	originatingStack string

	// done will be closed when the postHook is finished
	done chan struct{}
}

type PostStartHookConfigEntry struct {
	hook PostStartHookFunc
	// originatingStack holds the stack that registered postStartHooks. This allows us to show a more helpful message
	// for duplicate registration.