1 files changed, 377 insertions, 0 deletions
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
new file mode 100755
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+++ b/t/t7800-difftool.sh
@@ -0,0 +1,377 @@
+#!/bin/sh
+#
+# Copyright (c) 2009, 2010 David Aguilar
+#
+
+test_description='git-difftool
+
+Testing basic diff tool invocation
+'
+
+. ./test-lib.sh
+
+remove_config_vars()
+{
+	# Unset all config variables used by git-difftool
+	git config --unset diff.tool
+	git config --unset diff.guitool
+	git config --unset difftool.test-tool.cmd
+	git config --unset difftool.prompt
+	git config --unset merge.tool
+	git config --unset mergetool.test-tool.cmd
+	git config --unset mergetool.prompt
+	return 0
+}
+
+restore_test_defaults()
+{
+	# Restores the test defaults used by several tests
+	remove_config_vars
+	unset GIT_DIFF_TOOL
+	unset GIT_DIFFTOOL_PROMPT
+	unset GIT_DIFFTOOL_NO_PROMPT
+	git config diff.tool test-tool &&
+	git config difftool.test-tool.cmd 'cat $LOCAL'
+	git config difftool.bogus-tool.cmd false
+}
+
+prompt_given()
+{
+	prompt="$1"
+	test "$prompt" = "Launch 'test-tool' [Y/n]: branch"
+}
+
+stdin_contains()
+{
+	grep >/dev/null "$1"
+}
+
+stdin_doesnot_contain()
+{
+	! stdin_contains "$1"
+}
+
+# Create a file on master and change it on branch
+test_expect_success PERL 'setup' '
+	echo master >file &&
+	git add file &&
+	git commit -m "added file" &&
+
+	git checkout -b branch master &&
+	echo branch >file &&
+	git commit -a -m "branch changed file" &&
+	git checkout master
+'
+
+# Configure a custom difftool.<tool>.cmd and use it
+test_expect_success PERL 'custom commands' '
+	restore_test_defaults &&
+	git config difftool.test-tool.cmd "cat \$REMOTE" &&
+
+	diff=$(git difftool --no-prompt branch) &&
+	test "$diff" = "master" &&
+
+	restore_test_defaults &&
+	diff=$(git difftool --no-prompt branch) &&
+	test "$diff" = "branch"
+'
+
+# Ensures that git-difftool ignores bogus --tool values
+test_expect_success PERL 'difftool ignores bad --tool values' '
+	diff=$(git difftool --no-prompt --tool=bad-tool branch)
+	test "$?" = 1 &&
+	test "$diff" = ""
+'
+
+test_expect_success PERL 'difftool forwards arguments to diff' '
+	>for-diff &&
+	git add for-diff &&
+	echo changes>for-diff &&
+	git add for-diff &&
+	diff=$(git difftool --cached --no-prompt -- for-diff) &&
+	test "$diff" = "" &&
+	git reset -- for-diff &&
+	rm for-diff
+'
+
+test_expect_success PERL 'difftool honors --gui' '
+	git config merge.tool bogus-tool &&
+	git config diff.tool bogus-tool &&
+	git config diff.guitool test-tool &&
+
+	diff=$(git difftool --no-prompt --gui branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+test_expect_success PERL 'difftool --gui last setting wins' '
+	git config diff.guitool bogus-tool &&
+	git difftool --no-prompt --gui --no-gui &&
+
+	git config merge.tool bogus-tool &&
+	git config diff.tool bogus-tool &&
+	git config diff.guitool test-tool &&
+	diff=$(git difftool --no-prompt --no-gui --gui branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+test_expect_success PERL 'difftool --gui works without configured diff.guitool' '
+	git config diff.tool test-tool &&
+
+	diff=$(git difftool --no-prompt --gui branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# Specify the diff tool using $GIT_DIFF_TOOL
+test_expect_success PERL 'GIT_DIFF_TOOL variable' '
+	test_might_fail git config --unset diff.tool &&
+	GIT_DIFF_TOOL=test-tool &&
+	export GIT_DIFF_TOOL &&
+
+	diff=$(git difftool --no-prompt branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# Test the $GIT_*_TOOL variables and ensure
+# that $GIT_DIFF_TOOL always wins unless --tool is specified
+test_expect_success PERL 'GIT_DIFF_TOOL overrides' '
+	git config diff.tool bogus-tool &&
+	git config merge.tool bogus-tool &&
+
+	GIT_DIFF_TOOL=test-tool &&
+	export GIT_DIFF_TOOL &&
+
+	diff=$(git difftool --no-prompt branch) &&
+	test "$diff" = "branch" &&
+
+	GIT_DIFF_TOOL=bogus-tool &&
+	export GIT_DIFF_TOOL &&
+
+	diff=$(git difftool --no-prompt --tool=test-tool branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# Test that we don't have to pass --no-prompt to difftool
+# when $GIT_DIFFTOOL_NO_PROMPT is true
+test_expect_success PERL 'GIT_DIFFTOOL_NO_PROMPT variable' '
+	GIT_DIFFTOOL_NO_PROMPT=true &&
+	export GIT_DIFFTOOL_NO_PROMPT &&
+
+	diff=$(git difftool branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# git-difftool supports the difftool.prompt variable.
+# Test that GIT_DIFFTOOL_PROMPT can override difftool.prompt = false
+test_expect_success PERL 'GIT_DIFFTOOL_PROMPT variable' '
+	git config difftool.prompt false &&
+	GIT_DIFFTOOL_PROMPT=true &&
+	export GIT_DIFFTOOL_PROMPT &&
+
+	prompt=$(echo | git difftool branch | tail -1) &&
+	prompt_given "$prompt" &&
+
+	restore_test_defaults
+'
+
+# Test that we don't have to pass --no-prompt when difftool.prompt is false
+test_expect_success PERL 'difftool.prompt config variable is false' '
+	git config difftool.prompt false &&
+
+	diff=$(git difftool branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# Test that we don't have to pass --no-prompt when mergetool.prompt is false
+test_expect_success PERL 'difftool merge.prompt = false' '
+	test_might_fail git config --unset difftool.prompt &&
+	git config mergetool.prompt false &&
+
+	diff=$(git difftool branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# Test that the -y flag can override difftool.prompt = true
+test_expect_success PERL 'difftool.prompt can overridden with -y' '
+	git config difftool.prompt true &&
+
+	diff=$(git difftool -y branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+# Test that the --prompt flag can override difftool.prompt = false
+test_expect_success PERL 'difftool.prompt can overridden with --prompt' '
+	git config difftool.prompt false &&
+
+	prompt=$(echo | git difftool --prompt branch | tail -1) &&
+	prompt_given "$prompt" &&
+
+	restore_test_defaults
+'
+
+# Test that the last flag passed on the command-line wins
+test_expect_success PERL 'difftool last flag wins' '
+	diff=$(git difftool --prompt --no-prompt branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults &&
+
+	prompt=$(echo | git difftool --no-prompt --prompt branch | tail -1) &&
+	prompt_given "$prompt" &&
+
+	restore_test_defaults
+'
+
+# git-difftool falls back to git-mergetool config variables
+# so test that behavior here
+test_expect_success PERL 'difftool + mergetool config variables' '
+	remove_config_vars &&
+	git config merge.tool test-tool &&
+	git config mergetool.test-tool.cmd "cat \$LOCAL" &&
+
+	diff=$(git difftool --no-prompt branch) &&
+	test "$diff" = "branch" &&
+
+	# set merge.tool to something bogus, diff.tool to test-tool
+	git config merge.tool bogus-tool &&
+	git config diff.tool test-tool &&
+
+	diff=$(git difftool --no-prompt branch) &&
+	test "$diff" = "branch" &&
+
+	restore_test_defaults
+'
+
+test_expect_success PERL 'difftool.<tool>.path' '
+	git config difftool.tkdiff.path echo &&
+	diff=$(git difftool --tool=tkdiff --no-prompt branch) &&
+	git config --unset difftool.tkdiff.path &&
+	lines=$(echo "$diff" | grep file | wc -l) &&
+	test "$lines" -eq 1 &&
+
+	restore_test_defaults
+'
+
+test_expect_success PERL 'difftool --extcmd=cat' '
+	diff=$(git difftool --no-prompt --extcmd=cat branch) &&
+	test "$diff" = branch"$LF"master
+'
+
+test_expect_success PERL 'difftool --extcmd cat' '
+	diff=$(git difftool --no-prompt --extcmd cat branch) &&
+	test "$diff" = branch"$LF"master
+'
+
+test_expect_success PERL 'difftool -x cat' '
+	diff=$(git difftool --no-prompt -x cat branch) &&
+	test "$diff" = branch"$LF"master
+'
+
+test_expect_success PERL 'difftool --extcmd echo arg1' '
+	diff=$(git difftool --no-prompt --extcmd sh\ -c\ \"echo\ \$1\" branch) &&
+	test "$diff" = file
+'
+
+test_expect_success PERL 'difftool --extcmd cat arg1' '
+	diff=$(git difftool --no-prompt --extcmd sh\ -c\ \"cat\ \$1\" branch) &&
+	test "$diff" = master
+'
+
+test_expect_success PERL 'difftool --extcmd cat arg2' '
+	diff=$(git difftool --no-prompt --extcmd sh\ -c\ \"cat\ \$2\" branch) &&
+	test "$diff" = branch
+'
+
+# Create a second file on master and a different version on branch
+test_expect_success PERL 'setup with 2 files different' '
+	echo m2 >file2 &&
+	git add file2 &&
+	git commit -m "added file2" &&
+
+	git checkout branch &&
+	echo br2 >file2 &&
+	git add file2 &&
+	git commit -a -m "branch changed file2" &&
+	git checkout master
+'
+
+test_expect_success PERL 'say no to the first file' '
+	diff=$( (echo n; echo) | git difftool -x cat branch ) &&
+
+	echo "$diff" | stdin_contains m2 &&
+	echo "$diff" | stdin_contains br2 &&
+	echo "$diff" | stdin_doesnot_contain master &&
+	echo "$diff" | stdin_doesnot_contain branch
+'
+
+test_expect_success PERL 'say no to the second file' '
+	diff=$( (echo; echo n) | git difftool -x cat branch ) &&
+
+	echo "$diff" | stdin_contains master &&
+	echo "$diff" | stdin_contains branch &&
+	echo "$diff" | stdin_doesnot_contain m2 &&
+	echo "$diff" | stdin_doesnot_contain br2
+'
+
+test_expect_success PERL 'difftool --tool-help' '
+	tool_help=$(git difftool --tool-help) &&
+	echo "$tool_help" | stdin_contains tool
+'
+
+test_expect_success PERL 'setup change in subdirectory' '
+	git checkout master &&
+	mkdir sub &&
+	echo master >sub/sub &&
+	git add sub/sub &&
+	git commit -m "added sub/sub" &&
+	echo test >>file &&
+	echo test >>sub/sub &&
+	git add . &&
+	git commit -m "modified both"
+'
+
+test_expect_success PERL 'difftool -d' '
+	diff=$(git difftool -d --extcmd ls branch) &&
+	echo "$diff" | stdin_contains sub &&
+	echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff' '
+	diff=$(git difftool --dir-diff --extcmd ls branch) &&
+	echo "$diff" | stdin_contains sub &&
+	echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff ignores --prompt' '
+	diff=$(git difftool --dir-diff --prompt --extcmd ls branch) &&
+	echo "$diff" | stdin_contains sub &&
+	echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff from subdirectory' '
+	(
+		cd sub &&
+		diff=$(git difftool --dir-diff --extcmd ls branch) &&
+		echo "$diff" | stdin_contains sub &&
+		echo "$diff" | stdin_contains file
+	)
+'
+
+test_done