partial cleanup of the macro pkg and move it from /core/router to the root because it may be used by the end-developers now to ammend the available macros per application

Former-commit-id: 951a5e7a401af25ecaa904ff6463b0def2c87afb

macro/interpreter/lexer/lexer_test.go

@@ -0,0 +1,54 @@
+package lexer
+
+import (
+	"testing"
+
+	"github.com/kataras/iris/macro/interpreter/token"
+)
+
+func TestNextToken(t *testing.T) {
+	input := `{id:number min(1) max(5) else 404}`
+
+	tests := []struct {
+		expectedType    token.Type
+		expectedLiteral string
+	}{
+		{token.LBRACE, "{"},     // 0
+		{token.IDENT, "id"},     // 1
+		{token.COLON, ":"},      // 2
+		{token.IDENT, "number"}, // 3
+		{token.IDENT, "min"},    // 4
+		{token.LPAREN, "("},     // 5
+		{token.INT, "1"},        // 6
+		{token.RPAREN, ")"},     // 7
+		{token.IDENT, "max"},    // 8
+		{token.LPAREN, "("},     // 9
+		{token.INT, "5"},        // 10
+		{token.RPAREN, ")"},     // 11
+		{token.ELSE, "else"},    // 12
+		{token.INT, "404"},      // 13
+		{token.RBRACE, "}"},     // 14
+	}
+
+	l := New(input)
+
+	for i, tt := range tests {
+		tok := l.NextToken()
+
+		if tok.Type != tt.expectedType {
+			t.Fatalf("tests[%d] - tokentype wrong. expected=%q, got=%q",
+				i, tt.expectedType, tok.Type)
+		}
+
+		if tok.Literal != tt.expectedLiteral {
+			t.Fatalf("tests[%d] - literal wrong. expected=%q, got=%q",
+				i, tt.expectedLiteral, tok.Literal)
+		}
+
+	}
+}
+
+// EMEINA STO:
+// 30/232 selida apto making a interpeter in Go.
+// den ekana to skipWhitespaces giati skeftomai
+// an borei na to xreiastw 9a dw aurio.