replace jest with ava

node_modules/ava/lib/worker/line-numbers.js

@@ -0,0 +1,90 @@
+function parse(file) {
+	const fs = require('fs');
+	const acorn = require('acorn');
+	const walk = require('acorn-walk');
+
+	const ast = acorn.parse(fs.readFileSync(file, 'utf8'), {
+		ecmaVersion: 11,
+		locations: true
+	});
+
+	const locations = [];
+	walk.simple(ast, {
+		CallExpression(node) {
+			locations.push(node.loc);
+		}
+	});
+
+	// Walking is depth-first, but we want to sort these breadth-first.
+	locations.sort((a, b) => {
+		if (a.start.line === b.start.line) {
+			return a.start.column - b.start.column;
+		}
+
+		return a.start.line - b.start.line;
+	});
+
+	return locations;
+}
+
+function findTest(locations, declaration) {
+	// Find all calls that span the test declaration.
+	const spans = locations.filter(loc => {
+		if (loc.start.line > declaration.line || loc.end.line < declaration.line) {
+			return false;
+		}
+
+		if (loc.start.line === declaration.line && loc.start.column > declaration.column) {
+			return false;
+		}
+
+		if (loc.end.line === declaration.line && loc.end.column < declaration.column) {
+			return false;
+		}
+
+		return true;
+	});
+
+	// Locations should be sorted by source order, so the last span must be the test.
+	return spans.pop();
+}
+
+const range = (start, end) => new Array(end - start + 1).fill(start).map((element, index) => element + index);
+
+module.exports = ({file, lineNumbers = []}) => {
+	if (lineNumbers.length === 0) {
+		return undefined;
+	}
+
+	// Avoid loading these until we actually need to select tests by line number.
+	const callsites = require('callsites');
+	const sourceMapSupport = require('source-map-support');
+
+	const locations = parse(file);
+	const selected = new Set(lineNumbers);
+
+	return () => {
+		// Assume this is called from a test declaration, which is located in the file.
+		// If not… don't select the test!
+		const callSite = callsites().find(callSite => callSite.getFileName() === file);
+		if (!callSite) {
+			return false;
+		}
+
+		// FIXME: This assumes the callSite hasn't already been adjusted. It's likely
+		// that if `source-map-support/register` has been loaded, this would result
+		// in the wrong location.
+		const sourceCallSite = sourceMapSupport.wrapCallSite(callSite);
+		const start = {
+			line: sourceCallSite.getLineNumber(),
+			column: sourceCallSite.getColumnNumber() - 1 // Use 0-indexed columns.
+		};
+
+		const test = findTest(locations, start);
+		if (!test) {
+			return false;
+		}
+
+		return range(test.start.line, test.end.line).some(line => selected.has(line));
+	};
+};