spec/expressive_spec.rb in expressive-0.0.23 vs spec/expressive_spec.rb in expressive-0.0.24

@@ -4,11 +4,11 @@
   before(:each) do
     @scope = Expressive::TopLevel.new
   end
 
   describe "all_symbols" do
-    it { Expressive.all_symbols.should =~ %w(+ - * / = set sum get put post >= > < <= and or if date lookup round $round $days_ago $hours_ago $minutes_ago $append $id $head $lookup $reverse $tail) }
+    it { Expressive.all_symbols.should =~ %w(+ - * / = set sum $sub get put post >= > < <= and or if date lookup round $round $days_ago $hours_ago $minutes_ago $append $id $head $lookup $reverse $tail) }
   end
 
   describe "understands booleans" do
     it { Expressive.run("true").should eql true }
     it { Expressive.run("false").should eql false }
@@ -35,10 +35,11 @@
     it { Expressive.run("(+ 4 2)").should eql 6.0 }
     it { Expressive.run("(- 4 2)").should eql 2.0 }
     it { Expressive.run("(* 4 2)").should eql 8.0 }
     it { Expressive.run("(/ 4 2)").should eql 2.0 }
     it { Expressive.run("(sum 1 2 3)").should eql 6.0 }
+    it { Expressive.run("(sub 1 2 3)").should eql -4.0 }
     it { Expressive.run("(sum )").should eql 0 }
     it { Expressive.run("(- (sum 1 5 7) 3)").should eql 10.0}
     it { Expressive.run("(round 0.12345 2)").should eql 0.12}
   end
 
@@ -76,9 +77,62 @@
       it { Expressive.run('(if (> nil_value 4) "greater" "not so greater")', @scope).should eql "not so greater" }
       it { Expressive.run('(if (> 4 nil_value) "greater" "not so greater")', @scope).should eql "greater" }
       it { Expressive.run('(if (> 4 nil_value) "greater" "not so greater")', @scope).should eql "greater" }
       it { Expressive.run('(if (<= nil_value 4) "greater" "not so greater")', @scope).should eql "greater" }
       it { Expressive.run('(if (>= 4 nil_value) "greater" "not so greater")', @scope).should eql "greater" }
+    end
+
+    context "multiple if statements" do
+      before do
+        @scope["depth"] = "4mm"
+        @statement = <<-EOH
+          (if (= depth "8mm") 1
+            (if (= depth "7mm") 0.8
+              (if (= depth "6mm") 0.65
+                (if (= depth "5mm") 0.5
+                  (if (= depth "4mm") 0.35
+                    (if (= depth "3mm") 0.2
+                      (if (= depth "2mm") 0.05 0)
+                    )
+                  )
+                )
+              )
+            )
+          )
+EOH
+      end
+      it do
+        @scope["depth"] = "8mm"
+        Expressive.run(@statement, @scope).should eql 1
+      end
+      it do
+        @scope["depth"] = "7mm"
+        Expressive.run(@statement, @scope).should eql 0.8
+      end
+      it do
+        @scope["depth"] = "6mm"
+        Expressive.run(@statement, @scope).should eql 0.65
+      end
+      it do
+        @scope["depth"] = "5mm"
+        Expressive.run(@statement, @scope).should eql 0.5
+      end
+      it do
+        @scope["depth"] = "4mm"
+        Expressive.run(@statement, @scope).should eql 0.35
+      end
+      it do
+        @scope["depth"] = "3mm"
+        Expressive.run(@statement, @scope).should eql 0.2
+      end
+      it do
+        @scope["depth"] = "2mm"
+        Expressive.run(@statement, @scope).should eql 0.05
+      end
+      it do
+        @scope["depth"] = "1.6mm"
+        Expressive.run(@statement, @scope).should eql 0
+      end
     end
   end
 
   describe "understands logical statements" do
     it { Expressive.run('(and true true)').should eql true }