comments_test.go

/*
Copyright 2017 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package sqlparser

import "testing"

func TestSplitTrailingComments(t *testing.T) {
	var testCases = []struct {
		input, outSQL, outComments string
	}{{
		input:       "/",
		outSQL:      "/",
		outComments: "",
	}, {
		input:       "*/",
		outSQL:      "*/",
		outComments: "",
	}, {
		input:       "/*/",
		outSQL:      "/*/",
		outComments: "",
	}, {
		input:       "a*/",
		outSQL:      "a*/",
		outComments: "",
	}, {
		input:       "*a*/",
		outSQL:      "*a*/",
		outComments: "",
	}, {
		input:       "**a*/",
		outSQL:      "**a*/",
		outComments: "",
	}, {
		input:       "/*b**a*/",
		outSQL:      "",
		outComments: "/*b**a*/",
	}, {
		input:       "/*a*/",
		outSQL:      "",
		outComments: "/*a*/",
	}, {
		input:       "/**/",
		outSQL:      "",
		outComments: "/**/",
	}, {
		input:       "/*b*/ /*a*/",
		outSQL:      "",
		outComments: "/*b*/ /*a*/",
	}, {
		input:       "foo /* bar */",
		outSQL:      "foo",
		outComments: " /* bar */",
	}, {
		input:       "foo /** bar */",
		outSQL:      "foo",
		outComments: " /** bar */",
	}, {
		input:       "foo /*** bar */",
		outSQL:      "foo",
		outComments: " /*** bar */",
	}, {
		input:       "foo /** bar **/",
		outSQL:      "foo",
		outComments: " /** bar **/",
	}, {
		input:       "foo /*** bar ***/",
		outSQL:      "foo",
		outComments: " /*** bar ***/",
	}, {
		input:       "foo /*** bar ***/ ",
		outSQL:      "foo",
		outComments: " /*** bar ***/",
	}, {
		input:       "*** bar ***/",
		outSQL:      "*** bar ***/",
		outComments: "",
	}}
	for _, testCase := range testCases {
		gotSQL, gotComments := SplitTrailingComments(testCase.input)

		if gotSQL != testCase.outSQL {
			t.Errorf("test input: '%s', got SQL\n%+v, want\n%+v", testCase.input, gotSQL, testCase.outSQL)
		}
		if gotComments != testCase.outComments {
			t.Errorf("test input: '%s', got Comments\n%+v, want\n%+v", testCase.input, gotComments, testCase.outComments)
		}
	}
}

func TestStripLeadingComments(t *testing.T) {
	var testCases = []struct {
		input, outSQL string
	}{{
		input:  "/",
		outSQL: "/",
	}, {
		input:  "*/",
		outSQL: "*/",
	}, {
		input:  "/*/",
		outSQL: "/*/",
	}, {
		input:  "/*a",
		outSQL: "/*a",
	}, {
		input:  "/*a*",
		outSQL: "/*a*",
	}, {
		input:  "/*a**",
		outSQL: "/*a**",
	}, {
		input:  "/*b**a*/",
		outSQL: "",
	}, {
		input:  "/*a*/",
		outSQL: "",
	}, {
		input:  "/**/",
		outSQL: "",
	}, {
		input:  "/*!*/",
		outSQL: "/*!*/",
	}, {
		input:  "/*!a*/",
		outSQL: "/*!a*/",
	}, {
		input:  "/*b*/ /*a*/",
		outSQL: "",
	}, {
		input: `/*b*/ --foo
bar`,
		outSQL: "bar",
	}, {
		input:  "foo /* bar */",
		outSQL: "foo /* bar */",
	}, {
		input:  "/* foo */ bar",
		outSQL: "bar",
	}, {
		input:  "-- /* foo */ bar",
		outSQL: "",
	}, {
		input:  "foo -- bar */",
		outSQL: "foo -- bar */",
	}, {
		input: `/*
foo */ bar`,
		outSQL: "bar",
	}, {
		input: `-- foo bar
a`,
		outSQL: "a",
	}, {
		input:  `-- foo bar`,
		outSQL: "",
	}}
	for _, testCase := range testCases {
		gotSQL := StripLeadingComments(testCase.input)

		if gotSQL != testCase.outSQL {
			t.Errorf("test input: '%s', got SQL\n%+v, want\n%+v", testCase.input, gotSQL, testCase.outSQL)
		}
	}
}

func TestExtractMysqlComment(t *testing.T) {
	var testCases = []struct {
		input, outSQL, outVersion string
	}{{
		input:      "/*!50708SET max_execution_time=5000 */",
		outSQL:     "SET max_execution_time=5000",
		outVersion: "50708",
	}, {
		input:      "/*!50708 SET max_execution_time=5000*/",
		outSQL:     "SET max_execution_time=5000",
		outVersion: "50708",
	}, {
		input:      "/*! SET max_execution_time=5000*/",
		outSQL:     "SET max_execution_time=5000",
		outVersion: "",
	}}
	for _, testCase := range testCases {
		gotVersion, gotSQL := ExtractMysqlComment(testCase.input)

		if gotVersion != testCase.outVersion {
			t.Errorf("test input: '%s', got version\n%+v, want\n%+v", testCase.input, gotVersion, testCase.outVersion)
		}
		if gotSQL != testCase.outSQL {
			t.Errorf("test input: '%s', got SQL\n%+v, want\n%+v", testCase.input, gotSQL, testCase.outSQL)
		}
	}
}