+test_expect_success 'git config handles environment config pairs' '
+ GIT_CONFIG_COUNT=2 \
+ GIT_CONFIG_KEY_0="pair.one" GIT_CONFIG_VALUE_0="foo" \
+ GIT_CONFIG_KEY_1="pair.two" GIT_CONFIG_VALUE_1="bar" \
+ git config --get-regexp "pair.*" >actual &&
+ cat >expect <<-EOF &&
+ pair.one foo
+ pair.two bar
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'git config ignores pairs without count' '
+ test_must_fail env GIT_CONFIG_KEY_0="pair.one" GIT_CONFIG_VALUE_0="value" \
+ git config pair.one 2>error &&
+ test_must_be_empty error
+'
+
+test_expect_success 'git config ignores pairs with zero count' '
+ test_must_fail env \
+ GIT_CONFIG_COUNT=0 \
+ GIT_CONFIG_KEY_0="pair.one" GIT_CONFIG_VALUE_0="value" \
+ git config pair.one
+'
+
+test_expect_success 'git config ignores pairs exceeding count' '
+ GIT_CONFIG_COUNT=1 \
+ GIT_CONFIG_KEY_0="pair.one" GIT_CONFIG_VALUE_0="value" \
+ GIT_CONFIG_KEY_1="pair.two" GIT_CONFIG_VALUE_1="value" \
+ git config --get-regexp "pair.*" >actual &&
+ cat >expect <<-EOF &&
+ pair.one value
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'git config ignores pairs with zero count' '
+ test_must_fail env \
+ GIT_CONFIG_COUNT=0 GIT_CONFIG_KEY_0="pair.one" GIT_CONFIG_VALUE_0="value" \
+ git config pair.one >error &&
+ test_must_be_empty error
+'
+
+test_expect_success 'git config ignores pairs with empty count' '
+ test_must_fail env \
+ GIT_CONFIG_COUNT= GIT_CONFIG_KEY_0="pair.one" GIT_CONFIG_VALUE_0="value" \
+ git config pair.one >error &&
+ test_must_be_empty error
+'
+
+test_expect_success 'git config fails with invalid count' '
+ test_must_fail env GIT_CONFIG_COUNT=10a git config --list 2>error &&
+ test_i18ngrep "bogus count" error &&
+ test_must_fail env GIT_CONFIG_COUNT=9999999999999999 git config --list 2>error &&
+ test_i18ngrep "too many entries" error
+'
+
+test_expect_success 'git config fails with missing config key' '
+ test_must_fail env GIT_CONFIG_COUNT=1 GIT_CONFIG_VALUE_0="value" \
+ git config --list 2>error &&
+ test_i18ngrep "missing config key" error
+'
+
+test_expect_success 'git config fails with missing config value' '
+ test_must_fail env GIT_CONFIG_COUNT=1 GIT_CONFIG_KEY_0="pair.one" \
+ git config --list 2>error &&
+ test_i18ngrep "missing config value" error
+'
+
+test_expect_success 'git config fails with invalid config pair key' '
+ test_must_fail env GIT_CONFIG_COUNT=1 \
+ GIT_CONFIG_KEY_0= GIT_CONFIG_VALUE_0=value \
+ git config --list &&
+ test_must_fail env GIT_CONFIG_COUNT=1 \
+ GIT_CONFIG_KEY_0=missing-section GIT_CONFIG_VALUE_0=value \
+ git config --list
+'
+
+test_expect_success 'environment overrides config file' '
+ test_when_finished "rm -f .git/config" &&
+ cat >.git/config <<-EOF &&
+ [pair]
+ one = value
+ EOF
+ GIT_CONFIG_COUNT=1 GIT_CONFIG_KEY_0=pair.one GIT_CONFIG_VALUE_0=override \
+ git config pair.one >actual &&
+ cat >expect <<-EOF &&
+ override
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'GIT_CONFIG_PARAMETERS overrides environment config' '
+ GIT_CONFIG_COUNT=1 GIT_CONFIG_KEY_0=pair.one GIT_CONFIG_VALUE_0=value \
+ GIT_CONFIG_PARAMETERS="${SQ}pair.one=override${SQ}" \
+ git config pair.one >actual &&
+ cat >expect <<-EOF &&
+ override
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'command line overrides environment config' '
+ GIT_CONFIG_COUNT=1 GIT_CONFIG_KEY_0=pair.one GIT_CONFIG_VALUE_0=value \
+ git -c pair.one=override config pair.one >actual &&
+ cat >expect <<-EOF &&
+ override
+ EOF
+ test_cmp expect actual
+'
+