environment.put("JABBA_HOME", "/other/.jabba")
        environment.put("SDKMAN_CANDIDATES_DIR", "/other/.sdkman/candidates")

        def configuration = new DefaultToolchainConfiguration(OperatingSystem.LINUX, systemProperties, environment)

        expect:
        configuration.asdfDataDirectory == new File("/other/.asdf")
        configuration.jabbaHomeDirectory == new File("/other/.jabba")

        when:
        def directories = supplier.get()

        then:
        directories.size() == 1
        directories[0].location == expectedLocation
        directories[0].source == "Jabba"
    }

    def "supplies multiple installations for multiple paths"() {
        given:
        def expectedLocation1 = candidates.createDir("jdk/11.0.6.hs-adpt")

    public JabbaInstallationSupplier(ToolchainConfiguration toolchainConfiguration) {
        this.toolchainConfiguration = toolchainConfiguration;
    }

    @Override
    public String getSourceName() {
        return "Jabba";
    }

    @Override
    public Set<InstallationLocation> get() {
        return findJavaCandidates(toolchainConfiguration.getJabbaHomeDirectory());
    }

JVM auto-detection knows how to work with:

* Operation-system specific locations: Linux, macOS, Windows
* Package Managers: https://asdf-vm.com/#/[Asdf-vm], https://github.com/shyiko/jabba[Jabba], https://sdkman.io/[SDKMAN!]
* https://maven.apache.org/guides/mini/guide-using-toolchains.html[Maven Toolchain] specifications
* https://www.jetbrains.com/help/idea/sdk.html#jdk-from-ide[IntelliJ IDEA] installations

var trimTests = []struct {
	f            string
	in, arg, out string
}{
	{"Trim", "abba", "a", "bb"},
	{"Trim", "abba", "ab", ""},
	{"TrimLeft", "abba", "ab", ""},
	{"TrimRight", "abba", "ab", ""},
	{"TrimLeft", "abba", "a", "bba"},
	{"TrimLeft", "abba", "b", "abba"},
	{"TrimRight", "abba", "a", "abb"},
	{"TrimRight", "abba", "b", "abba"},
	{"Trim", "<tag>", "<>", "tag"},
	{"Trim", "* listitem", " *", "listitem"},

	in, arg, out string
}

var trimTests = []TrimTest{
	{"Trim", "abba", "a", "bb"},
	{"Trim", "abba", "ab", ""},
	{"TrimLeft", "abba", "ab", ""},
	{"TrimRight", "abba", "ab", ""},
	{"TrimLeft", "abba", "a", "bba"},
	{"TrimLeft", "abba", "b", "abba"},
	{"TrimRight", "abba", "a", "abb"},
	{"TrimRight", "abba", "b", "abba"},
	{"Trim", "<tag>", "<>", "tag"},
	{"Trim", "* listitem", " *", "listitem"},

		"abraham", "isaac",
	)
	testCases = append(testCases,
		testCase{gen3, "abracadabrakazam abraham", "poofkazam lincoln"},
		testCase{gen3, "abrasion abracad", "scrape abracad"},
		testCase{gen3, "abba abram abrasive", "abba abram abrasive"},
		testCase{gen3, "", ""},
	)

	// foo{1,2,3,4} have multiple old strings with an overall common prefix
	// and 1- or 2- byte extensions from the common prefix.
	foo1 := NewReplacer(

	indices []subexpIndex
}

var emptySubexpIndices = []subexpIndex{{"", -1}, {"missing", -1}}

var subexpCases = []subexpCase{
	{``, 0, nil, emptySubexpIndices},
	{`.*`, 0, nil, emptySubexpIndices},
	{`abba`, 0, nil, emptySubexpIndices},
	{`ab(b)a`, 1, []string{"", ""}, emptySubexpIndices},
	{`ab(.*)a`, 1, []string{"", ""}, emptySubexpIndices},
	{`(.*)ab(.*)a`, 2, []string{"", "", ""}, emptySubexpIndices},

ABB8          ; mapped                 ; 13E8          # 8.0  CHEROKEE SMALL LETTER TSV
ABB9          ; mapped                 ; 13E9          # 8.0  CHEROKEE SMALL LETTER WA
ABBA          ; mapped                 ; 13EA          # 8.0  CHEROKEE SMALL LETTER WE
ABBB          ; mapped                 ; 13EB          # 8.0  CHEROKEE SMALL LETTER WI