Comparing 2 multiline strings.groovy

def string1 = """\
001001
000101
000101
"""

def string2 = """\
10
01
01
"""

def string3 = """\
010
010
010
"""

def string4 = """\
10001000
00100100
00000100
"""

def includes(String s1, String s2) {
    def linesS1 = s1.readLines()
    def linesS2 = s2.readLines()

    def s1Width = linesS1[0].length()
    def s2Width = linesS2[0].length()

    assert linesS1.size() == linesS2.size() && s1Width >= s2Width

    def height = linesS1.size()

    def s1Column = 0
    def s2Column = 0

    while (s1Column <= s1Width - s2Width) { // maxColumn is smaller than biggest string width
        if (linesS1[0][s1Column] == linesS2[0][0]) { // Upper char of current s1 column equals first char in s2
            def success = true

            loop:
            for (int row = 0; row < height; row++) { // Cycle through each row
                for (int col = 0; col < s2Width; col++) { // Cycle through each column
                    if (linesS2[row][col] != linesS1[row][col + s1Column]) {
                        success = false
                        break loop
                    }
                }
            }

            if (success) {
                return true
            }

        }
        s1Column++
    }

    return false
}

//string1.contains(string2)   > true
//string1.contains(string3)   > false
//string4.contains(string2)   > true
//string4.contains(string3)   > false

println includes(string1, string2)
println includes(string1, string3)
println includes(string4, string2)
println includes(string4, string3)