772897a1cd
Use `diff --color=always` to print colored output for language test failures. I've also flipped the arguments so that expected lines missing from the actual output will be marked with a red `-` and additional lines found in the actual output will be marked with a green `+`. Previously it was the other way around, which was very confusing.
34 lines
1 KiB
Bash
34 lines
1 KiB
Bash
# Golden test support
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#
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# Test that the output of the given test matches what is expected. If
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# `_NIX_TEST_ACCEPT` is non-empty also update the expected output so
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# that next time the test succeeds.
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function diffAndAcceptInner() {
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local -r testName=$1
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local -r got="$2"
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local -r expected="$3"
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# Absence of expected file indicates empty output expected.
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if test -e "$expected"; then
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local -r expectedOrEmpty="$expected"
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else
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local -r expectedOrEmpty=lang/empty.exp
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fi
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# Diff so we get a nice message
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if ! diff --color=always --unified "$expectedOrEmpty" "$got"; then
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echo "FAIL: evaluation result of $testName not as expected"
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badDiff=1
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fi
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# Update expected if `_NIX_TEST_ACCEPT` is non-empty.
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if test -n "${_NIX_TEST_ACCEPT-}"; then
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cp "$got" "$expected"
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# Delete empty expected files to avoid bloating the repo with
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# empty files.
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if ! test -s "$expected"; then
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rm "$expected"
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fi
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fi
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}
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