1 files changed, 29 insertions, 0 deletions
diff --git a/Tests/barTests/BlockRefreshTests.swift b/Tests/barTests/BlockRefreshTests.swift
new file mode 100644
index 0000000..495bcac
--- /dev/null
+++ b/Tests/barTests/BlockRefreshTests.swift
@@ -0,0 +1,29 @@
+import Combine
+import Testing
+@testable import bar
+
+@Test @MainActor func unchangedOutputDoesNotPublish() {
+	let block = Block(name: "test", placement: .left, command: "")
+	var publications = 0
+	let subscription = block.$cells.dropFirst().sink { _ in publications += 1 }
+	defer { subscription.cancel() }
+
+	block.apply(["same", "same"])
+	block.apply(["same", "same"])
+	#expect(publications == 1)
+	#expect(block.cells.map(\.rawValue) == ["same", "same"])
+
+	// A highlight-only change must still publish, even with identical text.
+	block.apply(["&!1 same", "same"])
+	#expect(publications == 2)
+	#expect(block.cells[0].id == " same:1")
+	block.apply([])
+	block.apply([])
+	#expect(publications == 3)
+	#expect(block.cells.isEmpty)
+}
+
+@Test func runnerPreservesOutputAcrossPoolDrain() {
+	#expect(Runner.run("printf 'first\\n\\nlast\\n'") == ["first", "", "last"])
+	#expect(Runner.run("exit 1") == ["ERROR"])
+}