!accept("!@#%", "%#@!")
        !accept("hey joe", "hoe hey")
    }

    def "does not accept candidate version that differs in separator"() {
        expect:
        !accept("1.0", "1_0")
        !accept("1_0", "1-0")
        !accept("1-0", "1+0")
        !accept("1.a.2", "1a2")
    }

    def "does not accept candidate version that has different number of trailing .0's"() {
        expect:

	assert(0_0e0 == 0.)
	assert(1_2_3e0 == 123.)
	assert(0_123e0 == 123.)

	assert(0e-0_0 == 0.)
	assert(1_2_3E+0 == 123.)
	assert(0123E1_2_3 == 123e123)

	assert(0.e+1 == 0.)
	assert(123.E-1_0 == 123e-10)
	assert(01_23.e123 == 123e123)

	assert(.0e-1 == .0)
	assert(.123E+10 == .123e10)
	assert(.0123E123 == .0123e123)

	assert(1_2_3.123 == 123.123)
	assert(0123.01_23 == 123.0123)

        "1.0.0"   | "1.0.0"
        "!@#%"    | "!@#%"
        "hey joe" | "hey joe"
    }

    def "versions that differ only in separators are equal"() {
        expect:
        compare("1.0", "1_0") == 0
        compare("1_0", "1-0") == 0
        compare("1-0", "1+0") == 0
        compare("1.a.2", "1a2") == 0 // number-word and word-number boundaries are considered separators
    }