Added StringUtilitiesTest.scala, which passes.

1 files changed, 75 insertions, 0 deletions

diff --git a/scalding/src/test/scala/sandcrawler/StringUtilitiesTest.scala b/scalding/src/test/scala/sandcrawler/StringUtilitiesTest.scala
new file mode 100644
index 0000000..2df5a22
--- /dev/null
+++ b/scalding/src/test/scala/sandcrawler/StringUtilitiesTest.scala
@@ -0,0 +1,75 @@
+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
+  }
+}