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Harden DFTE rendering and placeholder registration to fail safely under stalled and invalid inputs.

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Add regression coverage and docs updates so these edge cases stay stable across board test runs.
This commit is contained in:
alex
2026-04-16 13:48:25 +10:00
parent 416ab74238
commit 73fdd28f74
12 changed files with 262 additions and 38 deletions
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test/test_template_engine/tests/test_edge_cases.cpp
+12 -2
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@@ -26,8 +26,18 @@ void test_edge_cases_error_handling() {
TemplateContext ctx;
ctx.setRegistry(&registry);
// Test render with null template pointer (should handle gracefully)
// Note: initializeContext expects valid PROGMEM pointer, so we'll test with empty template
// Test render with null template pointer (should enter error cleanly)
TemplateRenderer::initializeContext(ctx, nullptr, false);
TEST_ASSERT_TRUE_MESSAGE(ctx.hasError(),
"Null template pointer should set context to error");
uint8_t nullBuffer[8];
size_t nullWritten = TemplateRenderer::renderNextChunk(ctx, nullBuffer, sizeof(nullBuffer));
TEST_ASSERT_EQUAL_UINT32_MESSAGE(0u, static_cast<uint32_t>(nullWritten),
"Null template render should produce no output");
// Test render with empty template
ctx.reset();
ctx.setRegistry(&registry);
TemplateRenderer::initializeContext(ctx, empty_template);
String result1 = captureRenderedOutput(ctx);
TEST_ASSERT_EQUAL_STRING_MESSAGE("", result1.c_str(),