tests: Add tests for automatic use of pager

[git.git] / t / t7006-pager.sh

diff --git a/t/t7006-pager.sh b/t/t7006-pager.sh
new file mode 100755 (executable)
index 0000000..4f52ea5
--- /dev/null
+++ b/t/t7006-pager.sh
@@ -0,0 +1,163 @@
+#!/bin/sh
+
+test_description='Test automatic use of a pager.'
+
+. ./test-lib.sh
+
+rm -f stdout_is_tty
+test_expect_success 'is stdout a terminal?' '
+       if test -t 1
+       then
+               : > stdout_is_tty
+       fi
+'
+
+if test -e stdout_is_tty
+then
+       test_set_prereq TTY
+else
+       say stdout is not a terminal, so skipping some tests.
+fi
+
+unset GIT_PAGER GIT_PAGER_IN_USE
+git config --unset core.pager
+PAGER='cat > paginated.out'
+export PAGER
+
+test_expect_success 'setup' '
+       test_commit initial
+'
+
+rm -f paginated.out
+test_expect_success TTY 'some commands use a pager' '
+       git log &&
+       test -e paginated.out
+'
+
+rm -f paginated.out
+test_expect_success TTY 'some commands do not use a pager' '
+       git rev-list HEAD &&
+       ! test -e paginated.out
+'
+
+rm -f paginated.out
+test_expect_success 'no pager when stdout is a pipe' '
+       git log | cat &&
+       ! test -e paginated.out
+'
+
+rm -f paginated.out
+test_expect_success 'no pager when stdout is a regular file' '
+       git log > file &&
+       ! test -e paginated.out
+'
+
+rm -f paginated.out
+test_expect_success TTY 'git --paginate rev-list uses a pager' '
+       git --paginate rev-list HEAD  &&
+       test -e paginated.out
+'
+
+rm -f file paginated.out
+test_expect_success 'no pager even with --paginate when stdout is a pipe' '
+       git --paginate log | cat &&
+       ! test -e paginated.out
+'
+
+rm -f paginated.out
+test_expect_success TTY 'no pager with --no-pager' '
+       git --no-pager log &&
+       ! test -e paginated.out
+'
+
+# A colored commit log will begin with an appropriate ANSI escape
+# for the first color; the text "commit" comes later.
+colorful() {
+       read firstline < $1
+       ! expr "$firstline" : "^[a-zA-Z]" >/dev/null
+}
+
+rm -f colorful.log colorless.log
+test_expect_success 'tests can detect color' '
+       git log --no-color > colorless.log &&
+       git log --color > colorful.log &&
+       ! colorful colorless.log &&
+       colorful colorful.log
+'
+
+rm -f colorless.log
+git config color.ui auto
+test_expect_success 'no color when stdout is a regular file' '
+       git log > colorless.log &&
+       ! colorful colorless.log
+'
+
+rm -f paginated.out
+git config color.ui auto
+test_expect_success TTY 'color when writing to a pager' '
+       TERM=vt100 git log &&
+       colorful paginated.out
+'
+
+rm -f colorful.log
+git config color.ui auto
+test_expect_success 'color when writing to a file intended for a pager' '
+       TERM=vt100 GIT_PAGER_IN_USE=true git log > colorful.log &&
+       colorful colorful.log
+'
+
+unset PAGER GIT_PAGER
+git config --unset core.pager
+test_expect_success 'determine default pager' '
+       less=$(git var GIT_PAGER) &&
+       test -n "$less"
+'
+
+if expr "$less" : '^[a-z]*$' > /dev/null && test_have_prereq TTY
+then
+       test_set_prereq SIMPLEPAGER
+fi
+
+unset PAGER GIT_PAGER
+git config --unset core.pager
+rm -f default_pager_used
+test_expect_success SIMPLEPAGER 'default pager is used by default' '
+       cat > $less <<-EOF &&
+       #!$SHELL_PATH
+       : > default_pager_used
+       EOF
+       chmod +x $less &&
+       PATH=.:$PATH git log &&
+       test -e default_pager_used
+'
+
+unset GIT_PAGER
+git config --unset core.pager
+rm -f PAGER_used
+test_expect_success TTY 'PAGER overrides default pager' '
+       PAGER=": > PAGER_used" &&
+       export PAGER &&
+       git log &&
+       test -e PAGER_used
+'
+
+unset GIT_PAGER
+rm -f core.pager_used
+test_expect_success TTY 'core.pager overrides PAGER' '
+       PAGER=: &&
+       export PAGER &&
+       git config core.pager ": > core.pager_used" &&
+       git log &&
+       test -e core.pager_used
+'
+
+rm -f GIT_PAGER_used
+test_expect_success TTY 'GIT_PAGER overrides core.pager' '
+       git config core.pager : &&
+       GIT_PAGER=": > GIT_PAGER_used" &&
+       export GIT_PAGER &&
+       git log &&
+       test -e GIT_PAGER_used
+'
+
+test_done