added tests

interpreter/tests/lox/variable/collide_with_parameter.lox

@@ -0,0 +1,3 @@
+fun foo(a) {
+  var a; // Error at 'a': Already a variable with this name in this scope.
+}

interpreter/tests/lox/variable/duplicate_local.lox

@@ -0,0 +1,4 @@
+{
+  var a = "value";
+  var a = "other"; // Error at 'a': Already a variable with this name in this scope.
+}

interpreter/tests/lox/variable/duplicate_parameter.lox

@@ -0,0 +1,4 @@
+fun foo(arg,
+        arg) { // Error at 'arg': Already a variable with this name in this scope.
+  "body";
+}

interpreter/tests/lox/variable/early_bound.lox

@@ -0,0 +1,10 @@
+var a = "outer";
+{
+  fun foo() {
+    print a;
+  }
+
+  foo(); // expect: outer
+  var a = "inner";
+  foo(); // expect: outer
+}

interpreter/tests/lox/variable/in_middle_of_block.lox

@@ -0,0 +1,10 @@
+{
+  var a = "a";
+  print a; // expect: a
+  var b = a + " b";
+  print b; // expect: a b
+  var c = a + " c";
+  print c; // expect: a c
+  var d = b + " d";
+  print d; // expect: a b d
+}

interpreter/tests/lox/variable/in_nested_block.lox

@@ -0,0 +1,6 @@
+{
+  var a = "outer";
+  {
+    print a; // expect: outer
+  }
+}

interpreter/tests/lox/variable/local_from_method.lox

@@ -0,0 +1,9 @@
+var foo = "variable";
+
+class Foo {
+  method() {
+    print foo;
+  }
+}
+
+Foo().method(); // expect: variable

interpreter/tests/lox/variable/redeclare_global.lox

@@ -0,0 +1,3 @@
+var a = "1";
+var a;
+print a; // expect: nil

interpreter/tests/lox/variable/redefine_global.lox

@@ -0,0 +1,3 @@
+var a = "1";
+var a = "2";
+print a; // expect: 2

interpreter/tests/lox/variable/scope_reuse_in_different_blocks.lox

@@ -0,0 +1,9 @@
+{
+  var a = "first";
+  print a; // expect: first
+}
+
+{
+  var a = "second";
+  print a; // expect: second
+}

interpreter/tests/lox/variable/shadow_and_local.lox

@@ -0,0 +1,8 @@
+{
+  var a = "outer";
+  {
+    print a; // expect: outer
+    var a = "inner";
+    print a; // expect: inner
+  }
+}

interpreter/tests/lox/variable/shadow_global.lox

@@ -0,0 +1,6 @@
+var a = "global";
+{
+  var a = "shadow";
+  print a; // expect: shadow
+}
+print a; // expect: global

interpreter/tests/lox/variable/shadow_local.lox

@@ -0,0 +1,8 @@
+{
+  var a = "local";
+  {
+    var a = "shadow";
+    print a; // expect: shadow
+  }
+  print a; // expect: local
+}

interpreter/tests/lox/variable/undefined_global.lox

@@ -0,0 +1 @@
+print notDefined;  // expect runtime error: Undefined variable 'notDefined'.

interpreter/tests/lox/variable/undefined_local.lox

@@ -0,0 +1,3 @@
+{
+  print notDefined;  // expect runtime error: Undefined variable 'notDefined'.
+}

interpreter/tests/lox/variable/uninitialized.lox

@@ -0,0 +1,2 @@
+var a;
+print a; // expect: nil

interpreter/tests/lox/variable/unreached_undefined.lox

@@ -0,0 +1,5 @@
+if (false) {
+  print notDefined;
+}
+
+print "ok"; // expect: ok

interpreter/tests/lox/variable/use_false_as_var.lox

@@ -0,0 +1,2 @@
+// [line 2] Error at 'false': Expect variable name.
+var false = "value";

interpreter/tests/lox/variable/use_global_in_initializer.lox

@@ -0,0 +1,3 @@
+var a = "value";
+var a = a;
+print a; // expect: value

interpreter/tests/lox/variable/use_local_in_initializer.lox

@@ -0,0 +1,4 @@
+var a = "outer";
+{
+  var a = a; // Error at 'a': Can't read local variable in its own initializer.
+}

interpreter/tests/lox/variable/use_nil_as_var.lox

@@ -0,0 +1,2 @@
+// [line 2] Error at 'nil': Expect variable name.
+var nil = "value";

interpreter/tests/lox/variable/use_this_as_var.lox

@@ -0,0 +1,2 @@
+// [line 2] Error at 'this': Expect variable name.
+var this = "value";