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-rwxr-xr-xt/t4045-diff-relative.sh249
1 files changed, 249 insertions, 0 deletions
diff --git a/t/t4045-diff-relative.sh b/t/t4045-diff-relative.sh
new file mode 100755
index 0000000..9b46c4c
--- /dev/null
+++ b/t/t4045-diff-relative.sh
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+test_description='diff --relative tests'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+ git commit --allow-empty -m empty &&
+ echo content >file1 &&
+ mkdir subdir &&
+ echo other content >subdir/file2 &&
+ blob_file1=$(git hash-object file1) &&
+ blob_file2=$(git hash-object subdir/file2) &&
+ git add . &&
+ git commit -m one
+'
+
+check_diff () {
+ dir=$1
+ shift
+ expect=$1
+ shift
+ short_blob=$(git rev-parse --short $blob_file2)
+ cat >expected <<-EOF
+ diff --git a/$expect b/$expect
+ new file mode 100644
+ index 0000000..$short_blob
+ --- /dev/null
+ +++ b/$expect
+ @@ -0,0 +1 @@
+ +other content
+ EOF
+ test_expect_success "-p $*" "
+ git -C '$dir' diff -p $* HEAD^ >actual &&
+ test_cmp expected actual
+ "
+}
+
+check_numstat () {
+ dir=$1
+ shift
+ expect=$1
+ shift
+ cat >expected <<-EOF
+ 1 0 $expect
+ EOF
+ test_expect_success "--numstat $*" "
+ echo '1 0 $expect' >expected &&
+ git -C '$dir' diff --numstat $* HEAD^ >actual &&
+ test_cmp expected actual
+ "
+}
+
+check_stat () {
+ dir=$1
+ shift
+ expect=$1
+ shift
+ cat >expected <<-EOF
+ $expect | 1 +
+ 1 file changed, 1 insertion(+)
+ EOF
+ test_expect_success "--stat $*" "
+ git -C '$dir' diff --stat $* HEAD^ >actual &&
+ test_cmp expected actual
+ "
+}
+
+check_raw () {
+ dir=$1
+ shift
+ expect=$1
+ shift
+ cat >expected <<-EOF
+ :000000 100644 $ZERO_OID $blob_file2 A $expect
+ EOF
+ test_expect_success "--raw $*" "
+ git -C '$dir' diff --no-abbrev --raw $* HEAD^ >actual &&
+ test_cmp expected actual
+ "
+}
+
+for type in diff numstat stat raw
+do
+ check_$type . file2 --relative=subdir/
+ check_$type . file2 --relative=subdir
+ check_$type subdir file2 --relative
+ check_$type . dir/file2 --relative=sub
+done
+
+check_diff_relative_option () {
+ dir=$1
+ shift
+ expect=$1
+ shift
+ relative_opt=$1
+ shift
+ test_expect_success "config diff.relative $relative_opt -p $*" "
+ short_blob=\$(git rev-parse --short $blob_file2) &&
+ cat >expected <<-EOF &&
+ diff --git a/$expect b/$expect
+ new file mode 100644
+ index 0000000..\$short_blob
+ --- /dev/null
+ +++ b/$expect
+ @@ -0,0 +1 @@
+ +other content
+ EOF
+ test_config -C $dir diff.relative $relative_opt &&
+ git -C '$dir' diff -p $* HEAD^ >actual &&
+ test_cmp expected actual
+ "
+}
+
+check_diff_no_relative_option () {
+ dir=$1
+ shift
+ expect=$1
+ shift
+ relative_opt=$1
+ shift
+ test_expect_success "config diff.relative $relative_opt -p $*" "
+ short_blob_file1=\$(git rev-parse --short $blob_file1) &&
+ short_blob_file2=\$(git rev-parse --short $blob_file2) &&
+ cat >expected <<-EOF &&
+ diff --git a/file1 b/file1
+ new file mode 100644
+ index 0000000..\$short_blob_file1
+ --- /dev/null
+ +++ b/file1
+ @@ -0,0 +1 @@
+ +content
+ diff --git a/$expect b/$expect
+ new file mode 100644
+ index 0000000..\$short_blob_file2
+ --- /dev/null
+ +++ b/$expect
+ @@ -0,0 +1 @@
+ +other content
+ EOF
+ test_config -C $dir diff.relative $relative_opt &&
+ git -C '$dir' diff -p $* HEAD^ >actual &&
+ test_cmp expected actual
+ "
+}
+
+check_diff_no_relative_option . subdir/file2 false
+check_diff_no_relative_option . subdir/file2 true --no-relative
+check_diff_no_relative_option . subdir/file2 false --no-relative
+check_diff_no_relative_option subdir subdir/file2 false
+check_diff_no_relative_option subdir subdir/file2 true --no-relative
+check_diff_no_relative_option subdir subdir/file2 false --no-relative
+
+check_diff_relative_option . file2 false --relative=subdir/
+check_diff_relative_option . file2 false --relative=subdir
+check_diff_relative_option . file2 true --relative=subdir/
+check_diff_relative_option . file2 true --relative=subdir
+check_diff_relative_option subdir file2 false --relative
+check_diff_relative_option subdir file2 true --relative
+check_diff_relative_option subdir file2 true
+check_diff_relative_option subdir file2 false --no-relative --relative
+check_diff_relative_option subdir file2 true --no-relative --relative
+check_diff_relative_option . file2 false --no-relative --relative=subdir
+check_diff_relative_option . file2 true --no-relative --relative=subdir
+
+test_expect_success 'external diff with --relative' '
+ test_when_finished "git reset --hard" &&
+ echo changed >file1 &&
+ echo changed >subdir/file2 &&
+
+ write_script mydiff <<-\EOF &&
+ # hacky pretend diff; the goal here is just to make sure we got
+ # passed sensible input that we _could_ diff, without relying on
+ # the specific output of a system diff tool.
+ echo "diff a/$1 b/$1" &&
+ echo "--- a/$1" &&
+ echo "+++ b/$1" &&
+ echo "@@ -1 +0,0 @@" &&
+ sed "s/^/-/" "$2" &&
+ sed "s/^/+/" "$5"
+ EOF
+
+ cat >expect <<-\EOF &&
+ diff a/file2 b/file2
+ --- a/file2
+ +++ b/file2
+ @@ -1 +0,0 @@
+ -other content
+ +changed
+ EOF
+ GIT_EXTERNAL_DIFF=./mydiff git diff --relative=subdir >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'setup diff --relative unmerged' '
+ test_commit zero file0 &&
+ test_commit base subdir/file0 &&
+ git switch -c br1 &&
+ test_commit one file0 &&
+ test_commit sub1 subdir/file0 &&
+ git switch -c br2 base &&
+ test_commit two file0 &&
+ git switch -c br3 &&
+ test_commit sub3 subdir/file0
+'
+
+test_expect_success 'diff --relative without change in subdir' '
+ git switch br2 &&
+ test_when_finished "git merge --abort" &&
+ test_must_fail git merge one &&
+ git -C subdir diff --relative >out &&
+ test_must_be_empty out &&
+ git -C subdir diff --relative --name-only >out &&
+ test_must_be_empty out
+'
+
+test_expect_success 'diff --relative --name-only with change in subdir' '
+ git switch br3 &&
+ test_when_finished "git merge --abort" &&
+ test_must_fail git merge sub1 &&
+ test_write_lines file0 file0 >expected &&
+ git -C subdir diff --relative --name-only >out &&
+ test_cmp expected out
+'
+
+test_expect_failure 'diff --relative with change in subdir' '
+ git switch br3 &&
+ br1_blob=$(git rev-parse --short --verify br1:subdir/file0) &&
+ br3_blob=$(git rev-parse --short --verify br3:subdir/file0) &&
+ test_when_finished "git merge --abort" &&
+ test_must_fail git merge br1 &&
+ cat >expected <<-EOF &&
+ diff --cc file0
+ index $br3_blob,$br1_blob..0000000
+ --- a/file0
+ +++ b/file0
+ @@@ -1,1 -1,1 +1,5 @@@
+ ++<<<<<<< HEAD
+ +sub3
+ ++=======
+ + sub1
+ ++>>>>>>> br1
+ EOF
+ git -C subdir diff --relative >out &&
+ test_cmp expected out
+'
+
+test_done