github.com/vescale/zgraph@v0.0.0-20230410094002-959c02d50f95/planner/expr_rewriter_test.go (about)

     1  // Copyright 2022 zGraph Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package planner_test
    16  
    17  import (
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/assert"
    21  	"github.com/vescale/zgraph/datum"
    22  	"github.com/vescale/zgraph/expression"
    23  	"github.com/vescale/zgraph/parser/ast"
    24  	"github.com/vescale/zgraph/planner"
    25  )
    26  
    27  func TestRewriteExpr(t *testing.T) {
    28  	cases := []struct {
    29  		expr   ast.ExprNode
    30  		expect expression.Expression
    31  	}{
    32  		{
    33  			expr:   &ast.ValueExpr{Datum: datum.NewInt(1)},
    34  			expect: &expression.Constant{Value: datum.NewInt(1)},
    35  		},
    36  	}
    37  
    38  	for _, c := range cases {
    39  		expr, err := planner.RewriteExpr(c.expr, &planner.LogicalDual{})
    40  		assert.Nil(t, err)
    41  		assert.Equal(t, c.expect, expr)
    42  	}
    43  }