Bug/binary expression (#135)

Added boolean binary operator

pkg/compiler/compiler_unary_test.go

@@ -0,0 +1,92 @@
+package compiler_test
+
+import (
+	"context"
+	"github.com/MontFerret/ferret/pkg/compiler"
+	. "github.com/smartystreets/goconvey/convey"
+	"testing"
+)
+
+func TestUnaryOperator(t *testing.T) {
+	Convey("RETURN !{BOOLEAN}", t, func() {
+		c := compiler.New()
+
+		out1, err := c.MustCompile(`
+			RETURN !TRUE
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out1), ShouldEqual, `false`)
+
+		out2, err := c.MustCompile(`
+			RETURN !FALSE
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out2), ShouldEqual, `true`)
+	})
+
+	Convey("RETURN foo ? TRUE : FALSE ", t, func() {
+		c := compiler.New()
+
+		out1, err := c.MustCompile(`
+			LET foo = TRUE
+			RETURN foo ? TRUE : FALSE
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out1), ShouldEqual, `true`)
+
+		out2, err := c.MustCompile(`
+			LET foo = TRUE
+			RETURN !foo ? TRUE : FALSE
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out2), ShouldEqual, `false`)
+	})
+
+	Convey("RETURN { enabled: !val}", t, func() {
+		c := compiler.New()
+
+		out1, err := c.MustCompile(`
+			LET val = ""
+			RETURN { enabled: !val }
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out1), ShouldEqual, `{"enabled":true}`)
+
+		out2, err := c.MustCompile(`
+			LET val = ""
+			RETURN { enabled: !!val }
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out2), ShouldEqual, `{"enabled":false}`)
+	})
+
+	Convey("RETURN -v", t, func() {
+		c := compiler.New()
+
+		out1, err := c.MustCompile(`
+			LET v = 1
+			RETURN -v
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out1), ShouldEqual, `-1`)
+	})
+
+	Convey("RETURN +v", t, func() {
+		c := compiler.New()
+
+		out1, err := c.MustCompile(`
+			LET v = -1
+			RETURN +v
+		`).Run(context.Background())
+
+		So(err, ShouldBeNil)
+		So(string(out1), ShouldEqual, `-1`)
+	})
+}