/
handlers_test.ts
309 lines (276 loc) · 8.33 KB
/
handlers_test.ts
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
const { test } = Deno;
import { assert, assertEquals, assertThrowsAsync } from "../testing/asserts.ts";
import {
LogLevels,
LogLevelNames,
getLevelName,
getLevelByName,
LevelName,
} from "./levels.ts";
import { BaseHandler, FileHandler, RotatingFileHandler } from "./handlers.ts";
import { LogRecord } from "./logger.ts";
import { existsSync } from "../fs/exists.ts";
const LOG_FILE = "./test_log.file";
class TestHandler extends BaseHandler {
public messages: string[] = [];
public log(str: string): void {
this.messages.push(str);
}
}
test("simpleHandler", function (): void {
const cases = new Map<number, string[]>([
[
LogLevels.DEBUG,
[
"DEBUG debug-test",
"INFO info-test",
"WARNING warning-test",
"ERROR error-test",
"CRITICAL critical-test",
],
],
[
LogLevels.INFO,
[
"INFO info-test",
"WARNING warning-test",
"ERROR error-test",
"CRITICAL critical-test",
],
],
[
LogLevels.WARNING,
["WARNING warning-test", "ERROR error-test", "CRITICAL critical-test"],
],
[LogLevels.ERROR, ["ERROR error-test", "CRITICAL critical-test"]],
[LogLevels.CRITICAL, ["CRITICAL critical-test"]],
]);
for (const [testCase, messages] of cases.entries()) {
const testLevel = getLevelName(testCase);
const handler = new TestHandler(testLevel);
for (const levelName of LogLevelNames) {
const level = getLevelByName(levelName as LevelName);
handler.handle(
new LogRecord(`${levelName.toLowerCase()}-test`, [], level)
);
}
assertEquals(handler.level, testCase);
assertEquals(handler.levelName, testLevel);
assertEquals(handler.messages, messages);
}
});
test("testFormatterAsString", function (): void {
const handler = new TestHandler("DEBUG", {
formatter: "test {levelName} {msg}",
});
handler.handle(new LogRecord("Hello, world!", [], LogLevels.DEBUG));
assertEquals(handler.messages, ["test DEBUG Hello, world!"]);
});
test("testFormatterAsFunction", function (): void {
const handler = new TestHandler("DEBUG", {
formatter: (logRecord): string =>
`fn formatter ${logRecord.levelName} ${logRecord.msg}`,
});
handler.handle(new LogRecord("Hello, world!", [], LogLevels.ERROR));
assertEquals(handler.messages, ["fn formatter ERROR Hello, world!"]);
});
test({
name: "FileHandler with mode 'w' will wipe clean existing log file",
async fn() {
const fileHandler = new FileHandler("WARNING", {
filename: LOG_FILE,
mode: "w",
});
await fileHandler.setup();
fileHandler.handle(new LogRecord("Hello World", [], LogLevels.WARNING));
await fileHandler.destroy();
const firstFileSize = (await Deno.stat(LOG_FILE)).size;
await fileHandler.setup();
fileHandler.handle(new LogRecord("Hello World", [], LogLevels.WARNING));
await fileHandler.destroy();
const secondFileSize = (await Deno.stat(LOG_FILE)).size;
assertEquals(secondFileSize, firstFileSize);
Deno.removeSync(LOG_FILE);
},
});
test({
name: "FileHandler with mode 'x' will throw if log file already exists",
async fn() {
await assertThrowsAsync(
async () => {
Deno.writeFileSync(LOG_FILE, new TextEncoder().encode("hello world"));
const fileHandler = new FileHandler("WARNING", {
filename: LOG_FILE,
mode: "x",
});
await fileHandler.setup();
},
Deno.errors.AlreadyExists,
"ile exists"
);
Deno.removeSync(LOG_FILE);
},
});
test({
name:
"RotatingFileHandler with mode 'w' will wipe clean existing log file and remove others",
async fn() {
Deno.writeFileSync(LOG_FILE, new TextEncoder().encode("hello world"));
Deno.writeFileSync(
LOG_FILE + ".1",
new TextEncoder().encode("hello world")
);
Deno.writeFileSync(
LOG_FILE + ".2",
new TextEncoder().encode("hello world")
);
Deno.writeFileSync(
LOG_FILE + ".3",
new TextEncoder().encode("hello world")
);
const fileHandler = new RotatingFileHandler("WARNING", {
filename: LOG_FILE,
maxBytes: 50,
maxBackupCount: 3,
mode: "w",
});
await fileHandler.setup();
await fileHandler.destroy();
assertEquals((await Deno.stat(LOG_FILE)).size, 0);
assert(!existsSync(LOG_FILE + ".1"));
assert(!existsSync(LOG_FILE + ".2"));
assert(!existsSync(LOG_FILE + ".3"));
Deno.removeSync(LOG_FILE);
},
});
test({
name:
"RotatingFileHandler with mode 'x' will throw if any log file already exists",
async fn() {
await assertThrowsAsync(
async () => {
Deno.writeFileSync(
LOG_FILE + ".3",
new TextEncoder().encode("hello world")
);
const fileHandler = new RotatingFileHandler("WARNING", {
filename: LOG_FILE,
maxBytes: 50,
maxBackupCount: 3,
mode: "x",
});
await fileHandler.setup();
},
Deno.errors.AlreadyExists,
"Backup log file " + LOG_FILE + ".3 already exists"
);
Deno.removeSync(LOG_FILE + ".3");
Deno.removeSync(LOG_FILE);
},
});
test({
name: "RotatingFileHandler with first rollover",
async fn() {
const fileHandler = new RotatingFileHandler("WARNING", {
filename: LOG_FILE,
maxBytes: 25,
maxBackupCount: 3,
mode: "w",
});
await fileHandler.setup();
fileHandler.handle(new LogRecord("AAA", [], LogLevels.ERROR)); // 'ERROR AAA\n' = 10 bytes
assertEquals((await Deno.stat(LOG_FILE)).size, 10);
fileHandler.handle(new LogRecord("AAA", [], LogLevels.ERROR));
assertEquals((await Deno.stat(LOG_FILE)).size, 20);
fileHandler.handle(new LogRecord("AAA", [], LogLevels.ERROR));
// Rollover occurred. Log file now has 1 record, rollover file has the original 2
assertEquals((await Deno.stat(LOG_FILE)).size, 10);
assertEquals((await Deno.stat(LOG_FILE + ".1")).size, 20);
await fileHandler.destroy();
Deno.removeSync(LOG_FILE);
Deno.removeSync(LOG_FILE + ".1");
},
});
test({
name: "RotatingFileHandler with all backups rollover",
async fn() {
Deno.writeFileSync(LOG_FILE, new TextEncoder().encode("original log file"));
Deno.writeFileSync(
LOG_FILE + ".1",
new TextEncoder().encode("original log.1 file")
);
Deno.writeFileSync(
LOG_FILE + ".2",
new TextEncoder().encode("original log.2 file")
);
Deno.writeFileSync(
LOG_FILE + ".3",
new TextEncoder().encode("original log.3 file")
);
const fileHandler = new RotatingFileHandler("WARNING", {
filename: LOG_FILE,
maxBytes: 2,
maxBackupCount: 3,
mode: "a",
});
await fileHandler.setup();
fileHandler.handle(new LogRecord("AAA", [], LogLevels.ERROR)); // 'ERROR AAA\n' = 10 bytes
await fileHandler.destroy();
const decoder = new TextDecoder();
assertEquals(decoder.decode(Deno.readFileSync(LOG_FILE)), "ERROR AAA\n");
assertEquals(
decoder.decode(Deno.readFileSync(LOG_FILE + ".1")),
"original log file"
);
assertEquals(
decoder.decode(Deno.readFileSync(LOG_FILE + ".2")),
"original log.1 file"
);
assertEquals(
decoder.decode(Deno.readFileSync(LOG_FILE + ".3")),
"original log.2 file"
);
assert(!existsSync(LOG_FILE + ".4"));
Deno.removeSync(LOG_FILE);
Deno.removeSync(LOG_FILE + ".1");
Deno.removeSync(LOG_FILE + ".2");
Deno.removeSync(LOG_FILE + ".3");
},
});
test({
name: "RotatingFileHandler maxBytes cannot be less than 1",
async fn() {
await assertThrowsAsync(
async () => {
const fileHandler = new RotatingFileHandler("WARNING", {
filename: LOG_FILE,
maxBytes: 0,
maxBackupCount: 3,
mode: "w",
});
await fileHandler.setup();
},
Error,
"maxBytes cannot be less than 1"
);
},
});
test({
name: "RotatingFileHandler maxBackupCount cannot be less than 1",
async fn() {
await assertThrowsAsync(
async () => {
const fileHandler = new RotatingFileHandler("WARNING", {
filename: LOG_FILE,
maxBytes: 50,
maxBackupCount: 0,
mode: "w",
});
await fileHandler.setup();
},
Error,
"maxBackupCount cannot be less than 1"
);
},
});