feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

1 files changed, 32 insertions, 0 deletions

diff --git a/vanilla/node_modules/@vitest/utils/dist/offset.js b/vanilla/node_modules/@vitest/utils/dist/offset.js
new file mode 100644
index 0000000..d8cb08d
--- /dev/null
+++ b/vanilla/node_modules/@vitest/utils/dist/offset.js
@@ -0,0 +1,32 @@
+const lineSplitRE = /\r?\n/;
+function positionToOffset(source, lineNumber, columnNumber) {
+	const lines = source.split(lineSplitRE);
+	const nl = /\r\n/.test(source) ? 2 : 1;
+	let start = 0;
+	if (lineNumber > lines.length) {
+		return source.length;
+	}
+	for (let i = 0; i < lineNumber - 1; i++) {
+		start += lines[i].length + nl;
+	}
+	return start + columnNumber;
+}
+function offsetToLineNumber(source, offset) {
+	if (offset > source.length) {
+		throw new Error(`offset is longer than source length! offset ${offset} > length ${source.length}`);
+	}
+	const lines = source.split(lineSplitRE);
+	const nl = /\r\n/.test(source) ? 2 : 1;
+	let counted = 0;
+	let line = 0;
+	for (; line < lines.length; line++) {
+		const lineLength = lines[line].length + nl;
+		if (counted + lineLength >= offset) {
+			break;
+		}
+		counted += lineLength;
+	}
+	return line + 1;
+}
+
+export { lineSplitRE, offsetToLineNumber, positionToOffset };