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package sandcrawler
import org.scalatest._
class StringUtilitiesTest extends FlatSpec with Matchers {
"removeAccents()" should "handle the empty string" in {
StringUtilities.removeAccents("") shouldBe ""
}
it should "not change a string with unaccented characters" in {
StringUtilities.removeAccents("abc123") shouldBe "abc123"
}
it should "remove accents from Ls" in {
StringUtilities.removeAccents("E\u0141\u0142en") shouldBe "ELlen"
}
it should "remove accents from Es without changing case" in {
val result = StringUtilities.removeAccents("\u00e9")
result should have length 1
result shouldBe "e"
}
it should "convert the ø in Soren" in {
StringUtilities.removeAccents("Søren") shouldBe "Soren"
StringUtilities.removeAccents("SØREN") shouldBe "SOREN"
}
// Tests adapted from https://oldfashionedsoftware.com/2009/11/19/string-distance-and-refactoring-in-scala/
"stringDistance" should "work on empty strings" in {
StringUtilities.stringDistance("", "") shouldBe 0
StringUtilities.stringDistance("a", "") shouldBe 1
StringUtilities.stringDistance("", "a") shouldBe 1
StringUtilities.stringDistance("abc", "") shouldBe 3
StringUtilities.stringDistance("", "abc") shouldBe 3
}
it should "work on equal strings" in {
StringUtilities.stringDistance("", "") shouldBe 0
StringUtilities.stringDistance("a", "a") shouldBe 0
StringUtilities.stringDistance("abc", "abc") shouldBe 0
}
it should "work where only inserts are needed" in {
StringUtilities.stringDistance("", "a") shouldBe 1
StringUtilities.stringDistance("a", "ab") shouldBe 1
StringUtilities.stringDistance("b", "ab") shouldBe 1
StringUtilities.stringDistance("ac", "abc") shouldBe 1
StringUtilities.stringDistance("abcdefg", "xabxcdxxefxgx") shouldBe 6
}
it should "work where only deletes are needed" in {
StringUtilities.stringDistance( "a", "") shouldBe 1
StringUtilities.stringDistance( "ab", "a") shouldBe 1
StringUtilities.stringDistance( "ab", "b") shouldBe 1
StringUtilities.stringDistance("abc", "ac") shouldBe 1
StringUtilities.stringDistance("xabxcdxxefxgx", "abcdefg") shouldBe 6
}
it should "work where only substitutions are needed" in {
StringUtilities.stringDistance( "a", "b") shouldBe 1
StringUtilities.stringDistance( "ab", "ac") shouldBe 1
StringUtilities.stringDistance( "ac", "bc") shouldBe 1
StringUtilities.stringDistance("abc", "axc") shouldBe 1
StringUtilities.stringDistance("xabxcdxxefxgx", "1ab2cd34ef5g6") shouldBe 6
}
it should "work where many operations are needed" in {
StringUtilities.stringDistance("example", "samples") shouldBe 3
StringUtilities.stringDistance("sturgeon", "urgently") shouldBe 6
StringUtilities.stringDistance("levenshtein", "frankenstein") shouldBe 6
StringUtilities.stringDistance("distance", "difference") shouldBe 5
StringUtilities.stringDistance("java was neat", "scala is great") shouldBe 7
}
}
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