diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/junit/scala/reflect/internal/ScopeTest.scala | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/test/junit/scala/reflect/internal/ScopeTest.scala b/test/junit/scala/reflect/internal/ScopeTest.scala new file mode 100644 index 0000000000..5166620189 --- /dev/null +++ b/test/junit/scala/reflect/internal/ScopeTest.scala @@ -0,0 +1,54 @@ +package symtab + +import scala.tools.nsc.symtab + +import org.junit.Assert._ +import org.junit.Test +import org.junit.runner.RunWith +import org.junit.runners.JUnit4 + +import scala.tools.testing.AssertUtil.assertThrows +import scala.tools.nsc.symtab.SymbolTableForUnitTesting + +@RunWith(classOf[JUnit4]) +class ScopeTest { + object symbolTable extends SymbolTableForUnitTesting + + import symbolTable._ + + @Test + def testNestedScopeSmall(): Unit = testNestedScope(0) + @Test + def testNestedScopeLarge(): Unit = testNestedScope(64) // exceeding MIN_HASH + + private def testNestedScope(initSize: Int) { + def sym(termName: String): Symbol = NoSymbol.newValue(TermName(termName)) + val foo = sym("foo") + val bar = sym("bar") + + val outerElems = List.tabulate(initSize)(i => sym(i.toString)) + val outer = newScopeWith(outerElems ++ List(foo, bar) : _*) + assertTrue(outer.containsName(foo.name)) + assertTrue(outer.containsName(bar.name)) + + val baz = sym("baz") + val nested = newNestedScope(outer) + + // Entries from the outer scope are entered in the nested. + assertTrue(outer.containsName(foo.name)) + assertTrue(outer.containsName(bar.name)) + + // Nested scopes structurally share ScopeEntry-s with the outer. + assertSame(outer.lookupEntry(foo.name), nested.lookupEntry(foo.name)) + nested.enter(baz) + + // Symbols entered in the nested scope aren't visible in the outer. + assertTrue(nested.containsName(baz.name)) + assertTrue(!outer.containsName(baz.name)) + + // Unlinking a symbol in the inner scope doesn't modify the outer + nested.unlink(bar) + assert(!nested.containsName(bar.name)) + assert(outer.containsName(bar.name)) + } +} |