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This module provides a function test_regex() that is functionally rather like regexp_matches(), but with additional debugging-oriented options and additional output. The debug options are somewhat obscure; they are chosen to match the API of the test harness that Henry Spencer wrote way-back-when for use in Tcl. With this, we can import all the test cases that Spencer wrote originally, even for regex functionality that we don't currently expose in Postgres. This seems necessary because we can no longer rely on Tcl to act as upstream and verify any fixes or improvements that we make. In addition to Spencer's tests, I added a few for lookbehind constraints (which we added in 2015, and Tcl still hasn't absorbed) that are modeled on his tests for lookahead constraints. After looking at code coverage reports, I also threw in a couple of tests to more fully exercise our "high colormap" logic. According to my testing, this brings the check-world coverage for src/backend/regex/ from 71.1% to 86.7% of lines. (coverage.postgresql.org shows a slightly different number, which I think is because it measures a non-assert build.) Discussion: https://postgr.es/m/2873268.1609732164@sss.pgh.pa.us
9 lines
323 B
SQL
9 lines
323 B
SQL
/* src/test/modules/test_regex/test_regex--1.0.sql */
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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
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\echo Use "CREATE EXTENSION test_regex" to load this file. \quit
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CREATE FUNCTION test_regex(pattern text, string text, flags text)
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RETURNS SETOF text[]
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STRICT
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AS 'MODULE_PATHNAME' LANGUAGE C;
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