1 files changed, 51 insertions, 0 deletions
diff --git a/test/gtest/source-map.cpp b/test/gtest/source-map.cpp
new file mode 100644
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+++ b/test/gtest/source-map.cpp
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+/*
+ * Copyright 2024 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "source-map.h"
+#include "print-test.h"
+#include "gtest/gtest.h"
+
+using namespace wasm;
+
+using SourceMapTest = PrintTest;
+
+// Check that debug location parsers can handle single-segment mappings.
+TEST_F(SourceMapTest, SourceMappingSingleSegment) {
+  auto text = "(module)";
+  Module wasm;
+  parseWast(wasm, text);
+
+  // A single-segment mapping starting at offset 0.
+  std::string sourceMap = R"(
+      {
+          "version": 3,
+          "sources": [],
+          "names": [],
+          "mappings": "A"
+      }
+  )";
+  std::vector<char> buffer(sourceMap.begin(), sourceMap.end());
+
+  SourceMapReader reader(buffer);
+
+  // Test `readSourceMapHeader` (only check for errors, as there is no mapping
+  // to print).
+  reader.readHeader(wasm);
+
+  // Test `readNextDebugLocation`.
+  // TODO: Actually check the result.
+  reader.readDebugLocationAt(1);
+}