Merge pull request #3147 from som-snytt/issue/repl-columns

SI-7969 REPL -C columnar output

1 files changed, 85 insertions, 0 deletions

diff --git a/test/junit/scala/tools/nsc/interpreter/TabulatorTest.scala b/test/junit/scala/tools/nsc/interpreter/TabulatorTest.scala
new file mode 100644
index 0000000000..21e338eac0
--- /dev/null
+++ b/test/junit/scala/tools/nsc/interpreter/TabulatorTest.scala
@@ -0,0 +1,85 @@
+package scala.tools.nsc
+package interpreter
+
+//import org.junit.Assert._
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+case class Tabby(width: Int = 80, isAcross: Boolean = false, marginSize: Int = 3) extends Tabulator
+case class VTabby(width: Int = 80, isAcross: Boolean = false, marginSize: Int = 3) extends VariColumnTabulator
+
+@RunWith(classOf[JUnit4])
+class TabulatorTest {
+
+  @Test def oneliner() = {
+    val sut   = Tabby()
+    val items = List("a", "b", "c")
+    val res   = sut tabulate items
+    assert(res.size == 1)
+    assert(res(0).size == 1)
+    assert(res(0)(0) startsWith "a")
+    assert(res(0)(0) endsWith "c")
+  }
+  @Test def twoliner() = {
+    val sut   = Tabby(width = 40)
+    val items = List("a" * 15, "b" * 15, "c" * 15)
+    val res   = sut tabulate items
+    assert(res.size == 2)
+    assert(res(0).size == 2)
+    assert(res(1).size == 2)          // trailing empty strings
+    assert(res(1)(0) startsWith "b")
+  }
+  @Test def twolinerx() = {
+    val sut   = Tabby(width = 40, isAcross = true)
+    val items = List("a" * 15, "b" * 15, "c" * 15)
+    val res   = sut tabulate items
+    assert(res.size == 2)
+    assert(res(0).size == 2)
+    assert(res(1).size == 1)          // no trailing empty strings
+    assert(res(1)(0) startsWith "c")
+  }
+  // before, two 9-width cols don't fit in 20
+  // but now, 5-col and 9-col do fit.
+  @Test def twolinerVariable() = {
+    val sut   = VTabby(width = 20)
+    val items = (1 to 9) map (i => i.toString * i)
+    val rows  = sut tabulate items
+    assert(rows.size == 5)
+    assert(rows(0).size == 2)
+    assert(rows(0)(0).size == 8) // width is 55555 plus margin of 3
+  }
+  @Test def sys() = {
+    val sut   = VTabby(width = 40)
+    val items = List("BooleanProp", "PropImpl", "addShutdownHook", "error",
+                    "process", "CreatorImpl", "ShutdownHookThread", "allThreads",
+                    "exit", "props", "Prop", "SystemProperties",
+                    "env", "package", "runtime")
+    val rows  = sut tabulate items
+    assert(rows.size == 8)
+    assert(rows(0).size == 2)
+    assert(rows(0)(0).size == "ShutdownHookThread".length + sut.marginSize)   // 21
+  }
+  @Test def syswide() = {
+    val sut   = VTabby(width = 120)
+    val items = List("BooleanProp", "PropImpl", "addShutdownHook", "error",
+                    "process", "CreatorImpl", "ShutdownHookThread", "allThreads",
+                    "exit", "props", "Prop", "SystemProperties",
+                    "env", "package", "runtime")
+    val rows  = sut tabulate items
+    assert(rows.size == 2)
+    assert(rows(0).size == 8)
+    assert(rows(0)(0).size == "BooleanProp".length + sut.marginSize)  // 14
+  }
+  @Test def resultFits() = {
+    val sut   = VTabby(width = 10)
+    // each of two lines would fit, but layout is two cols of width six > 10
+    // therefore, should choose ncols = 1
+    val items = List("a", "bcd",
+                    "efg", "h")
+    val rows  = sut tabulate items
+    assert(rows.size == 4)
+    assert(rows(0).size == 1)
+    assert(rows(0)(0).size == "efg".length + sut.marginSize)  // 6
+  }
+}