github.com/minio/minio@v0.0.0-20240328213742-3f72439b8a27/internal/s3select/sql/stringfuncs_contrib_test.go (about)

     1  /*
     2   * MinIO Object Storage (c) 2021 MinIO, Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *      http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package sql
    18  
    19  import "testing"
    20  
    21  func TestEvalSQLSubstring(t *testing.T) {
    22  	evalCases := []struct {
    23  		s           string
    24  		startIdx    int
    25  		length      int
    26  		resExpected string
    27  		errExpected error
    28  	}{
    29  		{"abcd", 1, 1, "a", nil},
    30  		{"abcd", -1, 1, "a", nil},
    31  		{"abcd", 999, 999, "", nil},
    32  		{"", 999, 999, "", nil},
    33  		{"测试abc", 1, 1, "测", nil},
    34  		{"测试abc", 5, 5, "c", nil},
    35  	}
    36  
    37  	for i, tc := range evalCases {
    38  		res, err := evalSQLSubstring(tc.s, tc.startIdx, tc.length)
    39  		if res != tc.resExpected || err != tc.errExpected {
    40  			t.Errorf("Eval Case %d failed: %v %v", i, res, err)
    41  		}
    42  	}
    43  }