project.testComponent.binaries.size() == 1
        def testBinary = project.testComponent.binaries[0]
        testBinary instanceof CppExecutable
        testBinary.name == 'testExecutable'
        testBinary.variantName == 'debug'
        testBinary.baseName == 'coreTest'
        testBinary.compilationDetails.sources.sourceFile as Set == [src1, src2] as Set
        testBinary.compilationDetails.headerDirs == [headerDir] as Set

        release.artifacts.size() == 1
    }

    private ComponentWithOutputs binary(String name, String taskName) {
        def outputs = fileCollection(taskName)
        def binary = Stub(TestBinary)
        binary.name >> name
        binary.names >> Names.of(name)
        binary.outputs >> outputs
        return binary
    }

    private FileCollection fileCollection(String taskName) {

        null       | "binary"   | "compile" | null   | "compileBinary"
        null       | "binary"   | "compile" | "java" | "compileBinaryJava"
        "test"     | "binary"   | null      | null   | "testBinary"
        "test"     | "binary"   | "compile" | null   | "compileTestBinary"
        "test"     | "binary"   | "compile" | "java" | "compileTestBinaryJava"
    }

		}
		if pxtestNeedsPtest {
			pxtest.Internal.Imports = append(pxtest.Internal.Imports, ptest)
		}
	}

	// Arrange for testing.Testing to report true.
	ldflags := append(p.Internal.Ldflags, "-X", "testing.testBinary=1")
	gccgoflags := append(p.Internal.Gccgoflags, "-Wl,--defsym,testing.gccgoTestBinary=1")

	// Build main package.
	pmain = &Package{
		PackagePublic: PackagePublic{
			Name:       "main",