Introduce query language (resembling reprepro syntax).

query/lex_test.go

@@ -0,0 +1,46 @@
+package query
+
+import (
+	"fmt"
+	. "launchpad.net/gocheck"
+)
+
+type LexerSuite struct {
+}
+
+var _ = Suite(&LexerSuite{})
+
+func (s *LexerSuite) TestLexing(c *C) {
+	_, ch := lex("query", "package (<< 1.3), $Source | !app")
+
+	c.Check(<-ch, Equals, item{typ: itemString, val: "package"})
+	c.Check(<-ch, Equals, item{typ: itemLeftParen, val: "("})
+	c.Check(<-ch, Equals, item{typ: itemLt, val: "<<"})
+	c.Check(<-ch, Equals, item{typ: itemString, val: "1.3"})
+	c.Check(<-ch, Equals, item{typ: itemRightParen, val: ")"})
+	c.Check(<-ch, Equals, item{typ: itemAnd, val: ","})
+	c.Check(<-ch, Equals, item{typ: itemString, val: "$Source"})
+	c.Check(<-ch, Equals, item{typ: itemOr, val: "|"})
+	c.Check(<-ch, Equals, item{typ: itemNot, val: "!"})
+	c.Check(<-ch, Equals, item{typ: itemString, val: "app"})
+	c.Check(<-ch, Equals, item{typ: itemEOF, val: ""})
+}
+
+func (s *LexerSuite) TestConsume(c *C) {
+	l, _ := lex("query", "package (<< 1.3)")
+
+	c.Check(l.Current(), Equals, item{typ: itemString, val: "package"})
+	c.Check(l.Current(), Equals, item{typ: itemString, val: "package"})
+	l.Consume()
+	c.Check(l.Current(), Equals, item{typ: itemLeftParen, val: "("})
+	l.Consume()
+	c.Check(l.Current(), Equals, item{typ: itemLt, val: "<<"})
+}
+
+func (s *LexerSuite) TestString(c *C) {
+	l, _ := lex("query", "package (<< 1.3)")
+
+	c.Check(fmt.Sprintf("%s", l.Current()), Equals, "\"package\"")
+	l.Consume()
+	c.Check(fmt.Sprintf("%s", l.Current()), Equals, "(")
+}