[llvm][mustache] Precommit test for Set Delimiter

[ilovepi]

Adds a new unit test for the Mustache Set Delimiter feature.

This test is written with inverted logic (EXPECT_NE) so that it
passes with the current implementation, which does not support
the feature. Once the feature is implemented, this test will fail,
signaling that the test logic should be flipped to EXPECT_EQ.

[ilovepi]

• [llvm][mustache] Avoid extra allocations in parseSection #159199
• [llvm][mustache] Optimize accessor splitting with a single pass #159198
• [llvm][mustache] Avoid redundant saves in accessor splitting #159197
• [llvm][mustache] Use single pass when tokenizing #159196
• [llvm][mustache] Avoid extra copy for json strings #159195
• [llvm][mustache] Use BumpPtrAllocator to save ASTNodes #159194
• [llvm][mustache] Simplify debug logging #159193
• [llvm][mustache] Fix failing StandaloneIndentation test #159192
• [llvm][mustache] Introduce MustacheContext to simplify mustache APIs #159191
• [llvm][mustache] Remove out parameters from processTags() #159190
• [llvm][mustache] Refactor template rendering #159189
• [llvm][mustache] Refactor tokenizer for clarity #159188
• [llvm][mustache] Support setting delimiters in templates #159187
• [llvm][mustache] Precommit test for Set Delimiter #159186 👈 (View in Graphite)
• [llvm][mustache] Align standalone partial indentation with spec #159185
• [llvm][mustache] Precommit test for StandaloneIndentation #159184
• [llvm][mustache] Add support for Triple Mustache #159183
• [llvm][mustache] Precommit tests for Triple Mustache #159182
• main

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[llvmbot]

@llvm/pr-subscribers-llvm-support

Author: Paul Kirth (ilovepi)

Changes

Adds a new unit test for the Mustache Set Delimiter feature.

This test is written with inverted logic (EXPECT_NE) so that it
passes with the current implementation, which does not support
the feature. Once the feature is implemented, this test will fail,
signaling that the test logic should be flipped to EXPECT_EQ.

---

Full diff: https://github.com/llvm/llvm-project/pull/159186.diff

1 Files Affected:

• (modified) llvm/unittests/Support/MustacheTest.cpp (+134)

diff --git a/llvm/unittests/Support/MustacheTest.cpp b/llvm/unittests/Support/MustacheTest.cpp
index b80c39fb7c5bc..f613fde072cde 100644
--- a/llvm/unittests/Support/MustacheTest.cpp
+++ b/llvm/unittests/Support/MustacheTest.cpp
@@ -1329,3 +1329,137 @@ TEST(MustacheTripleMustache, WithPadding) {
   EXPECT_EQ("|---|", Out);
 }
 
+TEST(MustacheDelimiters, PairBehavior) {
+  Value D = Object{{"text", "Hey!"}};
+  auto T = Template("{{=<% %>=}}(<%text%>)");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("(Hey!)", Out);
+}
+
+TEST(MustacheDelimiters, SpecialCharacters) {
+  Value D = Object{{"text", "It worked!"}};
+  auto T = Template("({{=[ ]=}}[text])");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("(It worked!)", Out);
+}
+
+TEST(MustacheDelimiters, Sections) {
+  Value D = Object{{"section", true}, {"data", "I got interpolated."}};
+  auto T = Template("[\n{{#section}}\n  {{data}}\n  |data|\n{{/section}}\n\n{{= "
+                    "| | =}}\n|#section|\n  {{data}}\n  |data|\n|/section|\n]\n");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("[\n  I got interpolated.\n  |data|\n\n  {{data}}\n  I got "
+            "interpolated.\n]\n",
+            Out);
+}
+
+TEST(MustacheDelimiters, InvertedSections) {
+  Value D = Object{{"section", false}, {"data", "I got interpolated."}};
+  auto T = Template("[\n{{^section}}\n  {{data}}\n  |data|\n{{/section}}\n\n{{= "
+                    "| | =}}\n|^section|\n  {{data}}\n  |data|\n|/section|\n]\n");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("[\n  I got interpolated.\n  |data|\n\n  {{data}}\n  I got "
+            "interpolated.\n]\n",
+            Out);
+}
+
+TEST(MustacheDelimiters, PartialInheritence) {
+  Value D = Object{{"value", "yes"}};
+  auto T = Template("[ {{>include}} ]\n{{= | | =}}\n[ |>include| ]\n");
+  T.registerPartial("include", ".{{value}}.");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("[ .yes. ]\n[ .yes. ]\n", Out);
+}
+
+TEST(MustacheDelimiters, PostPartialBehavior) {
+  Value D = Object{{"value", "yes"}};
+  auto T = Template("[ {{>include}} ]\n[ .{{value}}.  .|value|. ]\n");
+  T.registerPartial("include", ".{{value}}. {{= | | =}} .|value|.");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("[ .yes.  .yes. ]\n[ .yes.  .|value|. ]\n", Out);
+}
+
+TEST(MustacheDelimiters, SurroundingWhitespace) {
+  Value D = Object{};
+  auto T = Template("| {{=@ @=}} |");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_EQ("|  |", Out);
+}
+
+TEST(MustacheDelimiters, OutlyingWhitespaceInline) {
+  Value D = Object{};
+  auto T = Template(" | {{=@ @=}}\n");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_EQ(" | \n", Out);
+}
+
+TEST(MustacheDelimiters, StandaloneTag) {
+  Value D = Object{};
+  auto T = Template("Begin.\n{{=@ @=}}\nEnd.\n");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("Begin.\nEnd.\n", Out);
+}
+
+TEST(MustacheDelimiters, IndentedStandaloneTag) {
+  Value D = Object{};
+  auto T = Template("Begin.\n  {{=@ @=}}\nEnd.\n");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("Begin.\nEnd.\n", Out);
+}
+
+TEST(MustacheDelimiters, StandaloneLineEndings) {
+  Value D = Object{};
+  auto T = Template("|\r\n{{= @ @ =}}\r\n|");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("|\r\n|", Out);
+}
+
+TEST(MustacheDelimiters, StandaloneWithoutPreviousLine) {
+  Value D = Object{};
+  auto T = Template("  {{=@ @=}}\n=");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("=", Out);
+}
+
+TEST(MustacheDelimiters, StandaloneWithoutNewline) {
+  Value D = Object{};
+  auto T = Template("=\n  {{=@ @=}}");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("=\n", Out);
+}
+
+TEST(MustacheDelimiters, PairwithPadding) {
+  Value D = Object{};
+  auto T = Template("|{{= @   @ =}}|");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_EQ("||", Out);
+}
+

[github-actions]

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