While statements.

test/if.wren

@@ -28,3 +28,11 @@ io.write(c) // expect: good
 
 // Assignment in if condition.
 if (a = true) io.write(a) // expect: true
+
+// Newline after "if".
+if
+(true) io.write("good") // expect: good
+
+// Newline after "else".
+if (false) io.write("bad") else
+io.write("good") // expect: good

test/while.wren

@@ -0,0 +1,31 @@
+// Single-expression body.
+var c = 0
+while (c < 3) io.write(c = c + 1)
+// expect: 1
+// expect: 2
+// expect: 3
+
+// Block body.
+var a = 0
+while (a < 3) {
+    io.write(a)
+    a = a + 1
+}
+// expect: 0
+// expect: 1
+// expect: 2
+
+// Newline after "while".
+var d = 0
+while
+(d < 3) io.write(d = d + 1)
+// expect: 1
+// expect: 2
+// expect: 3
+
+// Result is null.
+var e = 0
+var f = while (e < 3) {
+  e = e + 1
+}
+io.write(f) // expect: null