Split out a separate test file for each widget

test/widgets/modify_test.zsh

@@ -0,0 +1,41 @@
+#!/usr/bin/env zsh
+
+source "${0:a:h}/../test_helper.zsh"
+
+oneTimeSetUp() {
+	source_autosuggestions
+}
+
+testModify() {
+	BUFFER=''
+	POSTDISPLAY=''
+
+	stub_and_eval \
+		_zsh_autosuggest_invoke_original_widget \
+		'BUFFER+="e"'
+
+	stub_and_echo \
+		_zsh_autosuggest_suggestion \
+		'echo hello'
+
+	_zsh_autosuggest_modify 'original-widget'
+
+	assertTrue \
+		'original widget not invoked' \
+		'stub_called _zsh_autosuggest_invoke_original_widget'
+
+	assertEquals \
+		'BUFFER was not modified' \
+		'e' \
+		"$BUFFER"
+
+	assertEquals \
+		'POSTDISPLAY does not contain suggestion' \
+		'cho hello' \
+		"$POSTDISPLAY"
+
+	restore _zsh_autosuggest_invoke_original_widget
+	restore _zsh_autosuggest_suggestion
+}
+
+run_tests "$0"