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dfe44c917c
This should prevent from emitting too long lines when too long args are passed to logger.* functions. For example, too long MetricsQL queries or too long data samples.
26 lines
721 B
Go
26 lines
721 B
Go
package logger
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import (
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"fmt"
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"testing"
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)
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func TestFormatLogMessage(t *testing.T) {
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f := func(format string, args []interface{}, maxArgLen int, expectedResult string) {
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t.Helper()
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result := formatLogMessage(maxArgLen, format, args)
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if result != expectedResult {
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t.Fatalf("unexpected result; got\n%q\nwant\n%q", result, expectedResult)
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}
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}
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// Zero format args
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f("foobar", nil, 1, "foobar")
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// Format args not exceeding the maxArgLen
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f("foo: %d, %s, %s, %s", []interface{}{123, "bar", []byte("baz"), fmt.Errorf("abc")}, 3, "foo: 123, bar, baz, abc")
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// Format args exceeding the maxArgLen
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f("foo: %s, %q, %s", []interface{}{"abcde", fmt.Errorf("foo bar baz"), "xx"}, 4, `foo: a..e, "f..z", xx`)
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}
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