Add test for if

src/CMakeLists.txt

@@ -63,6 +63,7 @@ functionaltest("mathops")
 functionaltest("len")
 functionaltest("not")
 functionaltest("type")
+functionaltest("if")
 
 install(TARGETS apfl DESTINATION lib)
 install(TARGETS apfl-bin DESTINATION bin)

src/functional-tests/if.at

@@ -0,0 +1,39 @@
+===== script =====
+i = 1
+if (== i 1) {
+    print "1: ok"
+}
+
+if (not (== i 1)) {
+    print "2: fail"
+} {
+    print "2: ok"
+}
+
+if false {
+    print "3: fail"
+} nil {
+    print "3: fail"
+} {
+    print "3: ok"
+}
+
+print (if true {
+    "4: ok"
+} {
+    "4: fail"
+})
+
+if false {
+    print "5: fail"
+} nil {
+    print "5: fail"
+} (== 1 2) {
+    print "5: fail"
+}
+
+===== output =====
+1: ok
+2: ok
+3: ok
+4: ok