Pull duplicated test logic from strategies into single test file

test/strategies_test.zsh

@@ -0,0 +1,85 @@
+#!/usr/bin/env zsh
+
+source "${0:a:h}/test_helper.zsh"
+
+oneTimeSetUp() {
+	source_autosuggestions
+}
+
+assertBackslashSuggestion() {
+	set_history <<-'EOF'
+		echo "hello\nworld"
+	EOF
+
+	assertSuggestion \
+		'echo "hello\' \
+		'echo "hello\nworld"'
+}
+
+assertDoubleBackslashSuggestion() {
+	set_history <<-'EOF'
+		echo "\\"
+	EOF
+
+	assertSuggestion \
+		'echo "\\' \
+		'echo "\\"'
+}
+
+assertTildeSuggestion() {
+	set_history <<-'EOF'
+		cd ~/something
+	EOF
+
+	assertSuggestion \
+		'cd' \
+		'cd ~/something'
+
+	assertSuggestion \
+		'cd ~' \
+		'cd ~/something'
+
+	assertSuggestion \
+		'cd ~/s' \
+		'cd ~/something'
+}
+
+assertParenthesesSuggestion() {
+	set_history <<-'EOF'
+		echo "$(ls foo)"
+	EOF
+
+	assertSuggestion \
+		'echo "$(' \
+		'echo "$(ls foo)"'
+}
+
+assertSquareBracketsSuggestion() {
+	set_history <<-'EOF'
+		echo "$history[123]"
+	EOF
+
+	assertSuggestion \
+		'echo "$history[' \
+		'echo "$history[123]"'
+}
+
+testSpecialCharsForAllStrategies() {
+	local strategies
+	strategies=(
+		"default"
+		"match_prev_cmd"
+	)
+
+	for s in $strategies; do
+		ZSH_AUTOSUGGEST_STRATEGY="$s"
+
+		assertBackslashSuggestion
+		assertDoubleBackslashSuggestion
+		assertTildeSuggestion
+		assertParenthesesSuggestion
+		assertSquareBracketsSuggestion
+	done
+}
+
+run_tests "$0"